epson epl-5500w service manual

EPSON TERMINAL PRINTER

EPL-5500WSERVICE MANUAL

EPSON4005668

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NOTICE

All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKOEPSON’s express written permission is forbidden.

The contents of this manual are subjects to change without notice.

All efforts have been made to ensure the accuracy of the contents of this manual. However, should anyerrors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual orthe consequence thereof.

Epson is a registered trademark of Seiko Epson Corporation.

General Notice:Other product names used herein are for identication purposes only and may be trademarksof their respective campanies.

Copyright © 1995 by SEIKO EPSON CORPORATION Nagano, Japan

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PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage toequipment.

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Greatcaution should be exercised in performing procedures preceded by DANGER Headings.

WARNING Signals a precaution which, if ignored, could result in damage to equipment.

The precautionary measures itemized below should always be observed when performing repair/ mainte-nance procedures.

DANGER

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERI-PHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITHBASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS INTHEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CON-NECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THEPOWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKINGON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI-FIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE,LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS APRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CON-NECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THEPOWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDSAND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATICDISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSINGINTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BYTHE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAP-PROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLEEPSON WARRANTY.

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SAFETY INFORMATION

This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser,provided the printer is operated according to the instructions in this manual provided.

Since radiation emitted by the laser is completely confined within protective housings, the laser beam cannot escapefrom the machine during any phase of user operation.

For United States Users;

[Laser Safety]

This printer is certified as a Class 1 Laser product under the U.S. Department of Health andHuman Services (DHHS) Radiation Performance Standard according to the Radiation Controlfor Health and Safety Act of 1968. This means that the printer does not produce hazardous laserradiation.

[CDRH Regulations]

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Adminis-tration implemented regulations for laser products on August 2, 1976. Compliance is mandatoryfor products marketed in the United States. The label shown below indicates compliance withthe CDRH regulations and must be attached to laser products marketed in the United States.

WARNING : Use of controls, adjustments or performance of procedures other thanthose specified in this manual may result in hazardous radiation exposure.

[Internal Laser Radiation]

Maximum Radiation Power: 5.0× 10-4 (W)Wave Length: 790 ± 20 nm

This is a Class IIIb Laser Diode Assay that has an invisible laser beam. The print head unit isNOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under anycircumstances.

For Other Countries Users;

WARNING : Use of controls, adjustments or performance of procedures other thanthose specified in this manual may result in hazardous radiation exposure.

This is a semiconductor laser. The maximum power of the laser diode is 5.0× 10-4

W and the wavelength is 790± 20 nm.

For Denmark Users;

ADVARSELUsynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgåudsættelse for stråling.

Klasse 1 laser produkt der opfylder IEC825 sikkerheds kravene.

For Finland, Sweden Users;

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VAROITUSLaitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altis-taa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteiylle.

VARNINGOm apparaten används på annat sätt än i denna bruksanvisning specificerats, kananvändaren utsättas för osynlig laserstrålning, som överskrider gränsen för laser klass1.

For Finland, Sweden Service People

VAROITUSAvattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle laser-säteilylle. Äläkatso säteeseen.

VARNINGOsynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ejstrålen.

For Norway Users;

ADVARSELDersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kanbrukeren utsettes for unsynlig laserstråling som overskrider grensen for laser klasse 1.

Dette er en halvleder laser. Maksimal effeckt til laserdiode er 5.0× 10-4 W ogbølgelengde er 790± 20 nm.

Laser Safety Labels

[Label on rear printer case]

A laser safety labels is attached on the outside of the printer shown below.

For United State

For Europe

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[Label inside printer]

The following laser safety label will be attached inside the printer as shown below.

For Denmark, Finland, Sweden, and Norway

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PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair ofEPL-5500W.The instructions and procedures included herein are intended for the experience repair technician, and attentionshould be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTIONProvides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLESDescribes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLYIncludes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENTSIncludes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTINGProvides Epson-approved techniques for adjustment.

CHAPTER 6. MAINTENANCEDescribes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

APPENDIXDescribes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

The contents of this manual are subject to change without notice.

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REVISION SHEET

Revision Issue Date Revision Page

Rev. A November 24, 1995 1st issue

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TABLE OF CONTENTS

CHAPTER 1. GENERAL DESCRIPTIONCHAPTER 2. OPERATING PRINCIPLESCHAPTER 3. DISASSEMBLY AND ASSEMBLYCHAPTER 4. ADJUSTMENTSCHAPTER 5. TROUBLESHOOTINGCHAPTER 6. MAINTENANCEAPPENDIX

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Chapter 1 General Description

Table of Contents

1.1 FEATURES 1-1

1.2 SPECIFICATIONS 1-31.2.1 Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31.2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.3 Reliability Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51.2.4 Environmental Conditions for Operating (Include Imaging Cartridge) . . . . 1-51.2.5 Environmental Conditions for Storage and Transportation . . . . . . . . . . . . 1-51.2.6 Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.7 Specifications for Consumable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.2.9 Software Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.3 INTERFACE SPECIFICATIONS 1-91.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4 OPERATING INSTRUCTIONS 1-91.4.1 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-91.4.2 Display of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.2.1 Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-101.4.2.2 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.4.3 Printing Resolution Host PC Capability Dependency. . . . . . . . . . . . . . . . 1-11

1.5 MAIN COMPONENTS 1-121.5.1 C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-131.5.2 PWB-E Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-141.5.3 PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-141.5.4 Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-151.5.5 FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-151.5.6 Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-161.5.7 Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Figures

Figure 1-1. Exterior View of the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Figure 1-2. Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Figure 1-3. Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Figure 1-4. Component Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12Figure 1-5. C180 MAIN Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Figure 1-6. PWB-E Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-7. PWB-F Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Figure 1-8. Optical Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15Figure 1-9. Fusing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15Figure 1-10. Photoconductor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16Figure 1-11. Developing Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List of Tables

Table 1-1. Options for the EPL-5500W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Table 1-2. Paper Feed Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-3. Paper Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Table 1-4. Usability of Special Papers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Table 1-5. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Table 1-6. Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10Table 1-7. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10Table 1-8. Host PC Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Rev. A 1-iii

1.1 FEATURES

The EPSON EPL-5500W laser printer has a 300/600 dots per inch (dpi) resolution and 6 pages per minute(ppm) printing speed in a dedicated Microsoft® Windows Printing System. It works under MicrosoftWindows 3.1x and Windows 95, achieving very high performance due to the recent advances in PCtechnology. The main features are:

❏ No ozone

❏ Printing speed — 6 ppm

❏ Resolution — 600/300 dpi

❏ Light weight — about 5 kg (11 lb)

❏ Small footprint

❏ Low running cost: separation of the development/toner cartridge and photoconductor unit

❏ Ease of use with Microsoft Windows Printing System (WPS)

❏ PCL4 software emulation mode

❏ High throughput, especially with fine-pitch halftone image output

❏ Freedom from the memory overflow

❏ Freedom from document incompatibility, True WYSIWYG

❏ Bidirectional parallel interface (ECP and Microsoft Peppy modes)

❏ Achieves high throughput with a very high-speed parallel interface. Maximum transmission speed isapproximately 2 MB/sec. (under ECP mode) or 600 KB/ sec. (under Peppy mode).

Figure 1-1 shows an exterior view of the EPL-5500W.

Figure 1-1. Exterior View of the EPL-5500W

EPL-5500W Service Manual General Description

Rev. A 1-1

Table 1-1 lists the optional units available for the EPL-5500W.

Table 1-1. Options for the EPL-5500W

Cat. No. Description Note

S050005 Developer cartridge Developer and toner cartridgeS051029 Photoconductor unit —

General Description EPL-5500W Service Manual

1-2 Rev. A

1.2 SPECIFICATIONS

This section provides statistical data for the EPL-5500W.

1.2.1 Basic Specifications

Printing method: Laser beam scanning and dry electrophotography

Resolution: 600/300 dpi

Printing speed: 6 ppm (letter/A4)

First printing time (A4/LT): Less than 20 seconds (face-up output)

Warm-up time: Less than 35 seconds(at rated current and 23° C (73° F) temperature)

Paper supply: See Table 1-2.

Table 1-2. Paper Feed Methods

Paper SupplyCapacity Using20 lb. (75 g/m 2)

PaperPaper Sizes Usage Thickness

(Ream Weight)

Standard built-in paper tray

150B5, A4, LT,EXEC, LGL

16 to 24 lb.(60 to 90 g/m2)

5 to 10Monarch,DL, C5, Env #10,11, 12, 14

Envelopes made of20 to 24 lb.(75 to 90 g/m2)paper

Manual feed slot 1Any size feedable(Note 2)

16 to 42 lb.(60 to 157 g/m2)

Notes:

1. The weight in pounds (lb) is determined by the weight of 500 sheets cut to 17× 22 inches;1 g/m2 = 0.2659763 lb.

2. Paper size range: width 3 to 8.5 inches (76 to 216 mm)length 5 to 14.0 inches (127 to 356 mm)

Paper types: See Table 1-3.

Table 1-3. Paper Types

Standard paperXerox 4024 DP paper20 lb (75 g/m2)

Normal paper

Regular photocopier paperBond paperRecycled paper16 to 24 lb (60 to 90 g/m2)

Special papers

Card stock (90 to 157 g/m2)EnvelopesLabelsLetterheadTransparency (OHP) sheetsColored paper


Rev. A 1-3

Usability of special papers: See Table 1-4.

Table 1-4. Usability of Special Papers

Input OHP Envelopes Labels Card Stock Letterhead

Standard built-inpaper tray

P P P P R

Manual feed slot P P P P R

R: Reliable feeding and good image quality.P: Possible, but better avoided.N: Not supported.

Paper feed alignment and direction: Center alignment for all sizes

Paper ejection: Face down

Output tray capacity: 100 sheets (face down)

Printable area (standard paper): See Figure 1-2.

Note: The actual printable area depends on the printer mode.

Noise: Less than 35 dB(A), standbyLess than 47 dB(A), operating

Ozone density: Less than 0.01 ppm

Toxicity: No toxicity exists in organic photoconductor (OPC), toner, orplastic materials

Printable Area

4.0 mm

4.0 mm

4.0 mm4.0 mm

Figure 1-2. Printable Area


1-4 Rev. A

1.2.2 Electrical Specifications

Table 1-5. Electrical Requirements and Ranges

Description 100 V Version 200 V Version

Rated voltage 100 ∼ 120 VAC 220 ∼ 240 VACInput voltage range 90 ∼ 132 VAC 198 ∼ 264 VACRated frequency range 50 ∼ 60 HzInput frequency range 47 ∼ 63 HzPower consumption Less than 500 W Less than 600 WPower consumption whilein standby mode

Less than 15 W(without option)

1.2.3 Reliability Specifications

MPBF (Mean Prints Between Failures): Over 25,000 sheets

Note: MPBF indicates the average number of pages printed before an occurrence of a problem requiringreplacement or service.

MTBF (Mean Time Between Failures): 3000 power on hours (POH)Jam rate: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Feed failure: 1 out of 2,000 sheets or less (excluding multiple-sheet feeding)Multiple paper feeds: 1 out of 500 sheets or lessPaper curl height: 30 mm (1.2 inches) or lessLeading edge bending (1 cm or more): 1 out of 1,000 sheetsMTTR (Mean Time To Repair): 30 minutes or lessDurability: 5 years or 1,800,000 sheets

1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge)

Temperature: 10 to 35° C (50 to 95° F)

Humidity: 15 to 85% RH

Altitude: 2,500 m (8,200 feet) or lower

Levelness: 1°

Illuminance: 3,000 lux or less (Must not be exposed to direct sunlight.)

Surrounding space: Printer should have at least 100 mm (4") of clearance on its sidesand rear.

1.2.5 Environmental Conditions for Storage and Transportation



Drop test: Clear to JIS Z0200-1987 Level 1

Vibration: Vibration frequency 5 to 100 Hz and 100 to 5 HzAcceleration 1 GAcceleration direction 3 directions

Resistance to atmospheric pressure: More than 61.3 KPa

Storage life: 18 months (following date of manufacture)


Rev. A 1-5

1.2.6 Applicable Standards

Safety Standards

120 VAC model: UL 1950, CSA 22.2 No. 950 Deviation 3220/240 VAC model: EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950),

SEMKO (IEC950), DEMKO (IEC950)

Safety Regulations (Laser Radiation)

120 VAC model: FDA (NCDRH) Class 1220/240 VAC model: VDE 0837 (Laser Class 1) (IEC825), SETI (IEC825), SEMKO

(IEC825), DEMKO (IEC825)

EMI

120 VAC model: FCC Part 15 Subpart B Class B, DOC Class B220/240 VAC model: Vfg 243 (VDE 0878 Part 3,30)

EN55022 Class B (CISPR Pub. 22 Class B)CE marking, EMC

Others

Toner: No effect on human health (OSHA-TSCA, EINECS)OPC: No effect on human health (OSHA)Ozone: Less than 0.01 mmp

other UL478 (5th edition)Materials: SWISS environmental law (must contain no CdS)

1.2.7 Specifications for Consumables

Life: Developer and toner cartridge: 3,000 pagesPhotoconductor unit: 20,000 pages

Note: In continuous printing mode with A4/letter paper at a 5% image ratio (black/white ratio). The lifevaries, depending on the printing mode (continuous or intermittent) and/or the image ratio.

Environmental Conditions for Storage and Transportation



Drop test: Height 76 cm (30.4 inches)Vibration: Same as printerResistance to atmospheric pressure: More than 74 KpaStorage term: 18 months (following date of manufacture)

1.2.8 Physical Specifications

Dimensions (Width× Depth× Height):

Printer: 352× 264 × 299 mm (13.9× 10.4× 11.8 inches)Weight: Approx. 5 kg (11 lb), with consumables, excluding all options


1-6 Rev. A

1.2.9 Software Specifications

Built-in modes: Microsoft Windows Printing SystemPCL4 (software emulation)


Rev. A 1-7

1.3 INTERFACE SPECIFICATIONS

The EPL-5500W is equipped with the following external interfaces:

❏ Parallel interface

1.3.1 Parallel Interface

The parallel interface has the following two modes:

❏ ECP mode❏ Microsoft Peppy mode

Pin assignments: Fully IEEE-1284 compliant

Connector type: P90-25027-1 (Amphenol) receptacle

Applicable plug: 57-30360 (Amphenol or equivalent)


1-8 Rev. A

1.4 OPERATING INSTRUCTIONS

This section describes printer functions, including control panel operation and messages.

1.4.1 Control Panel

The printer control panel gives you easy control over most common printer operations. The panel consists ofthe indicator lights described below.

Indicator Lights

❏ GREEN light

ON: Printer is ready or idle.

Blinking: Printer is currently receiving data.

❏ RED light

ON: Printer has detected errors.

GREEN Light

RED Light

Figure 1-3. Control Panel


Rev. A 1-9

1.4.2 Display of Messages

This printer indicates two types of messages with the status message window for the printer driver on the PC.

1.4.2.1 Status Messages

This section describes the status messages.

Table 1-6. Status Messages

Message Status

Printer ready Printer is ready.

Printing Printer is printing.

Manual feed Printer is loading paper from manual feed slot.

Paused Printer is in pause mode.

Printing stopped Printer is stopping during printing of a job.

Please wait Printer is in the wait condition.

Paused printer warming up Printer is warming up.

Printer warming up Printer is warming up.

1.4.2.2 Error Messages

This section describes error messages, what they indicate, and what measures to take to eliminate the error.

Table 1-7. Error Messages

Message Status Measures

Configuration error

The user is unable to redirecta port, or system softwarecannot find a file to completea request.

Check the printer connectionport, and reinstall the driver.

Low memory Memory in PC has run out. Add the memory to the PC.

No local printerThe printer is not connectedto the local port when you areusing PCL emulation.

PCL emulation does notsupport a network.

Status not availableThe printer does not returnstatus information.

Check the printer connection.

Check printer/ cableThe printer does not returnstatus information.

Check the printer connection.

Service error Printer is damaged. Service required.

Clear paper jam A paper jam occurred.Open the cover and removethe jammed paper. Thenclose the cover.


1-10 Rev. A

Table 1-7. Error Messages (Continued)

Message Status Measures

Check Toner & CoverPrinter is cover open or notoner cartridge is installed.

Check the cover and tonercartridge.

Wrong paper loadedPaper in the tray to be fed intothe printer is different from thespecified paper size.

Check the paper size.

Change paper Paper settings are wrong. Check the paper size settings.

1.4.3 Printing Resolution Host PC Capability Dependency

This printer driver calculates the host PC’s capability every time Windows starts up, and the driver drops theprinting resolution at the beginning of each job automatically if the value it detects will not allow completeprinting at the resolution the user has set. This printer can print pages at the resolution if the HOST PC fulfillthe following conditions.

Table 1-8. Host PC Conditions

CPU

Installed DRAM Quantity

Windows 3.1, WFW 3.11 Windows 95

< 8 MB ≥ 8 MB < 8 MB ≥ 12 MB

80386SX16/20/25/33 MHzor compatibles

300 DPI(Note 1)

300 DPI(Note 1)

— —

80386DX16/20/25/33 MHzor compatibles

300 DPI(Note 1)

300 DPI(Note 1)

300 DPI(Note 1)

300 DPI(Note 1)

80486SX/DX16/20 MHzor compatibles

300/600 DPI(Note 2)

300/600 DPI(Note 2)

300/600 DPI(Note 2)

300/600 DPI(Note 2)

80486SX/DX25/33/50 MHz80486DX250/66 MHz80486DX475/100 MHzPentium60/66/75/90/100120/133 MHz

300/600 DPI(Note 2)

300/600 DPI300/600 DPI

(Note 2)300/600 DPI

Note 1: Some pages may be not be printed completely, depending on complexity of those pages.

Note 2: Some pages may not be printed at 600 DPI depending on complexity of those pages.


Rev. A 1-11

1.5 MAIN COMPONENTS

To simplify maintenance and repair, the main components of the EPL-5500W have been designed for easyremoval and replacement. The main components are:

❏ C180 MAIN Board Main board❏ PWB-E Board Power supply circuit board❏ PWB-F Board High-voltage supply circuit board❏ Optical Unit Printhead unit❏ Fusing Unit❏ Photoconductor unit❏ Developer cartridge❏ Housing

Optical Unit

C180 MAIN Board

PWB-E Board

PWB-F Board

Fusing Unit

Figure 1-4. Main Components


1-12 Rev. A

1.5.1 C180 MAIN Board

The C180 MAIN board contains a parallel interface controller and engine controller board. The primaryfunctions of this board are receiving print data from the host and sending the print image to the enginecontroller via the video interface.

❏ Memory chips

4M-bit DRAM (U4)

❏ Custom ICs

ASIC E05B23 (U6)

The engine controller consists of an M3807x 8-bit CPU, including a MASK ROM. It controls laser scanning(the polygon mirror drive motor), image synchronization, laser beam pulse width, and power.

M3807(IC201)

E05B23(U6)

4M DRAM(U4)

Figure 1-5. C180 MAIN Board


Rev. A 1-13

1.5.2 PWB-E Board

The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the ACline voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 Vtype and 220/240 V type. The difference between the two circuits is only in the input section.

CAUTION

Do not touch VR1 on PWB-E board. This volume is for factory setting only.

1.5.3 PWB-F Board

The PWB-F is the high-voltage supply circuit board. It converts the development bias, OPC drum chargebias, and image transfer bias.

CAUTION

Do not touch VR3 on the PWB-F board. These volumes are for factory setting only.

F1

VR1

Figure 1-6. PWB-E Board

VR3

Figure 1-7. PWB-F Board


1-14 Rev. A

1.5.4 Optical Unit

The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) whichdrives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by thelaser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrorsand lenses, to create a latent electro-photographic image on the drum.

1.5.5 Fusing Unit

The fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp, thermistor,and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 V type. The onlydifference between them is the heater lamp.

Figure 1-8. Optical Unit

Figure 1-9. Fusing Unit


Rev. A 1-15

1.5.6 Photoconductor Unit

Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit.

1.5.7 Developing Cartridge

The developing mechanism for the printing process is integrated into this cartridge.

Figure 1-10. Photoconductor Unit

Figure 1-11. Developing Unit


1-16 Rev. A

Chapter 2 Operating Principles

Table of Contents

2.1 ENGINE OPERATION 2-12.1.1 Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.1.1.1 Paper Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.1.1.2 Drum Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42.1.1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.4 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.1.1.5 Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.1.1.6 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.1.2 Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.1.2.1 Main Motor Functions and Control . . . . . . . . . . . . . . . . . . . . . . . . 2-82.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor. . . . . . . . . . . . . . . 2-92.1.2.3 Fuser Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-102.1.2.4 Scanner Mirror Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-112.1.2.5 Laser Diode Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-122.1.2.6 Bias Voltages and Laser Drive Timing . . . . . . . . . . . . . . . . . . . . 2-132.1.2.7 Fan Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-152.1.2.8 Power Supply Circuit Function and Safety Protection. . . . . . . . . 2-15

2.2 PARALLEL INTERFACE CONTROLLER OPERATION 2-162.2.1 C180 MAIN Board Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Figures

Figure 2-1. Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Figure 2-2. Print Process Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Figure 2-3. Paper Feeding from the Paper Feed Tray . . . . . . . . . . . . . . . . . . . . 2-3Figure 2-4. Drum Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Figure 2-5. Laser Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-6. Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Figure 2-7. Image Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-8. Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Figure 2-9. Engine Controller Connecting Diagram . . . . . . . . . . . . . . . . . . . . . . 2-7Figure 2-10. Gear and Roller Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Figure 2-11. Main Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9Figure 2-12. Paper Take-Up Sensor and Paper Exit Sensor On/Off Timing . . . 2-9Figure 2-13. Fuser Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10Figure 2-14. Temperature for Fuser Control Procedure . . . . . . . . . . . . . . . . . . 2-10Figure 2-15. Scanner Motor Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11Figure 2-16. Laser Diode Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-17. LDATA Generation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12Figure 2-18. Laser Emission Power Adjustment Timing . . . . . . . . . . . . . . . . . . 2-12Figure 2-19. High-Voltage Supply Block Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-13Figure 2-20. Print Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-21. Print Sequence (Start) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-22. Print Sequence (End) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14Figure 2-23. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-15Figure 2-24. Parallel Interface Controller Section . . . . . . . . . . . . . . . . . . . . . . . 2-16Figure 2-25. C180 MAIN Board Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2-16

List of Tables

Table 2-1. Functions of C180 MAIN Board Main Elements . . . . . . . . . . . . . . . 2-18

2.1 ENGINE OPERATION

This section describes the functions and operating principles of the EPL-5500W engine. Figure 2-1 shows thelocations and names of the main engine components.

1. Fan Motor (M3) 11. Paper Feeding Tray2. Lower Fusing Roller 12. Paper Lift-up Plate3. Paper Exit Sensor (PC3) 13. Paper Take-up Roller4. Upper Fusing Roller 14. Paper Transport Roller5. Heater Lamp (H1) 15. Paper Take-up Sensor (PC1)6. Paper Exit Roller 16. Pre-image Transfer Roller7. Print Tray 17. Electrode Comb8. Optical Unit 18. Drum Cartridge9. Toner Cartridge10. Manual Feed Guide

1

2

3

4 56

7

8

9

10

11

1213

14

15

16

17

18

Figure 2-1. Main Components

EPL-5500W Service Manual Operating Principles

Rev. A 2-1

2.1.1 Print Process

This section describes the print process from paper feeding to paper exit. Figure 2-2 shows a diagram of theprint process.

Optical Unit

Drum Cartridge

Toner Cartridge

Paper FeedingTray

Fusing

ImageTransfer

Print Exit

DrumCharge

TonerHopper

Develop-ment

Multi Feeding(150 sheets)

Manual Feed(1 sheet)

Exposure

Figure 2-2. Print Process Diagram

Operating Principles EPL-5500W Service Manual

2-2 Rev. A

2.1.1.1 Paper Feeding

Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot (1 sheet ata time). Paper fed by the paper take-up roller is transported to the transport roller, pre-image transfer roller,and then exit roller. After this, the paper is fed out onto the print tray. The starting position of an image isdecided by the paper take-up sensor (PC1). A photo sensor is used as the paper take-up sensor (PC1) and thepaper exit sensor (PC3).

Paper Feeding Tray (Standard Tray)

When the paper take-up solenoid is energized, the main motor (M1) drive is transmitted to the paper take-uproller via the paper take-up clutch (a one-way clutch) to rotate the paper take-up roller one revolution. At thesame time, the depression cam rotates and releases the paper lift-up plate to feed the top (first) paper. Thefixed separating pad is used for the paper separation system. It prevents the second or later sheets from beingfed together with the top paper.

Upper Fusing Roller Paper Exit Roller

LowerFusingRoller

PC Drum

Pre-Image TransferRoller

Paper Lift-Up Plate

Fixed SeparatingPad

Transport Roller

Paper Take-Up Sensor (PC1)

Paper Exit Sensor(PC3)

Paper Take-UpRoller

DepressionCam

Paper Take-Up Clutch

Paper Take-UpSolenoid (SL1)

When SL1 is de-energized

When SL1 is energized

Paper Lift-Up Plate Paper

Figure 2-3. Paper Feeding from the Paper Feed Tray


Rev. A 2-3

2.1.1.2 Drum Charge

The PC drum is charged with static electricity before laser exposure. The rotating charge brush and pre-filmare used as the charging method. Less ozone is generated by the corona charge of the rotating charge brushand the pre-film, and the PC drum can be charged with low voltage because the charge is directly applied tothe PC drum. The charge brush is rotated by the drive of the M1 main motor via its gear.

Drum Cartridge

Rotating ChargeBrush

PC DrumProtectingShutter

PC Drum

Charged Surface:(approx. -800 V)

PC DrumProtectingShutter

Drum Chargingand Pre-fi lm Bias

PWB-FC180 MAIN

A

B Pre-film

A: Drum Charging BiasB: Drum Ground

IC201

Figure 2-4. Drum Charge


2-4 Rev. A

2.1.1.3 Laser Exposure

The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan)sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scanline.

2.1.1.4 Development

Toner is applied to the invisible static image on the PC drum and a toner image is created on the surface.When the PC drum starts to rotate (when the main motor is activated), the PC drum surface remains 0 V atthe position between the rotating charge brush and sleeve roller. At this time, a specified positive voltage isapplied to the sleeve roller to prevent toner from being attracted back onto the PC drum (reverse biascontrol).

1. Toner hopper: Contains toner.2. Toner agitating screw:Stirs the toner in the hopper and sends the toner to the toner transport

roller.3. Toner transport roller: Transports the toner to the sleeve roller.4. Doctor blade: Spreads a thin, even coat of toner over the resin sleeve. The toner is

negatively charged by passing between this blade and resin sleeve.5. Sleeve roller: Rotates the resin sleeve.6. Resin sleeve: Carries the toner to the PC drum surface for development.7. Bias seal: Collects the toner remaining on the resin sleeve.8. PC drum: Is exposed to the laser to create an invisible image and rotates to carry

the developed image to the paper surface.

Charged Surface

Laser-Exposed Surface:(Approx. -50 V)

PWB-D

SOS Sensor

Reflector Mirror

Laser Diode

M2

CN210

CN205

C180 MAIN

IC201

1

5

1

7

Figure 2-5. Laser Exposure

2

4

3

Vs Terminal

VB TerminalVBL Terminal

VB (Developing Bias)

VBL (Toner Blade Bias)

Vs (Lower Seal Bias)

PWB-F

CN1F

CN204

C180 MAIN

IC201

1

8

1

8

Figure 2-6. Development


Rev. A 2-5

2.1.1.5 Image Transfer

The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper.

2.1.1.6 Fusing

The toner image transferred onto the paper is fixed securely using a heat roller system as the fusing system.The upper fusing roller, which is heated by the heater lamp, fuses the toner image, which is securely fixed bythe pressure between the upper and lower fusing rollers. Thermistor TH1 detects and controls the temperatureof the upper fusing roller. Thermal fuse TF1 blows when the temperature exceeds 200° C (392° F), shuttingdown power to the heater lamp.

Image Transfer Unit

Housing

Pre-Image Transfer Roller

Housing

Electrode Comb

Electrode Comb

Housing

Pre-Image TransferRoller

Housing Ground

Image Transfer Bias

PWB-F

CN1F

PWB-S

C180 MAIN

IC201

CN2041

8

1

8

1

8

1

8

Figure 2-7. Image Transfer

Lower Fusing Roller

Thermal Fuse

Thermistor

Upper FusingRoller

Heater Lamp

Paper

Figure 2-8. Fusing


2-6 Rev. A

2.1.2 Engine Control

This section describes engine control, the power supply board, and the high-voltage supply board. Theengine is controlled by the main board (C180 MAIN board). Figure 2-9 shows the engine controllerconnection diagram.

C180 MAIN Board

MainMotor(M1)

PolygonMotor(M2)

FanMotor(M2)

ExitSensor(PC3)

PaperTake-upSensor(PC1)

PaperTake-upSolenoid(SL1)

FusingRollerThermistor(TH1)

PWB-SPWB-FHighVoltageUnit

Image TransferHousing

Image TransferCharger

PWB-DLaserDiodeDrive

PWB-EPowerUnit

Heater Lamp

Interlock Switch

Figure 2-9. Engine Controller Connection Diagram


Rev. A 2-7

2.1.2.1 Main Motor Functions and Control

The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit (lowercassette) via each gear, as shown below.

Toner Cartridge

Sleeve Roller A

Paper Exit Roller

Upper Fusing RollerLower FusingRoller

PC Drum

Pre-image TransferRoller

Main Motor (M1)

Optional Second Paper Feeding Unit

Paper Take-Up Roller

Paper Transport Roller

A

Figure 2-10. Gear and Roller Positions


2-8 Rev. A

Figure 2-11 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor,controlled by the CPU (IC201) on the main board (C180 MAIN). This board has a stepping motor driver ICthat drives the M1 main motor with a constant current.

2.1.2.2 Paper Take-Up Sensor and Paper Exit Sensor

The paper take-up sensor has three functions:1. To detect the top edge of paper. The engine starts printing when the detection signal

is received.2. To detect paper size. The printer detects the time it takes for paper to pass the paper

take-up sensor during paper feeding. If this time is long, longer paper is feeding;if the time is short, shorter paper is feeding.

3. To detect paper jams and feed jams.

If the paper take-up sensor does not turn on for paper feeding, the printer detects a feed jam or no paper. Afeed jam is a paper jam that occurs in the feed process.

If any of the following conditions is detected, the printer detects a paper jam. A paper jam is a jam thatoccurs in the printing process area.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is on at power on or when the upper caseis closed.

The paper take-up sensor (PC1) or the paper exit sensor (PC3) is not turned on or off within thespecified time. (Refer to the following timing chart.)

A

B

CN206

4321

M1 Main Motor

BoardC180 MAIN

B

A

Figure 2-11. Main Motor Drive Circuit

2.0 11.0

Take Up Solenoid ON

3.5-4.5 3.4-4.7

[seconds]

PC1(CN203-3)

PC3(CN208-3)

Figure 2-12. Paper Take-Up Sensor and Paper Exit SensorOn/Off Timing


Rev. A 2-9

2.1.2.3 Fuser Control

The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives aFUSERsignal from the main board (C180 MAIN), the power supply board (PWB-E) supplies the AC voltage to theheater lamp. This AC voltage is cut by an interlock switch when the case is open.

Thermistor TH1 detects the surface temperature of the upper fusing roller and inputs that analog voltage tothe 77-pin chip, IC201. Based on this temperature data, the heater lamp on/off signal (theFUSER signal) isoutput from the 54-pin chip, IC201, causing heater lamp H1 to turn on or off to control the fusingtemperature. When the heater lamp is not turned off even if the thermistor detects a high temperaturemalfunction (which occurs if the surface temperature of the upper fusing roller exceeds 200º C), the signalfrom the 75-pin chip, IC201, changes from H to L to turn off the heater lamp forcibly.

The following figure shows the fuser temperature control procedure.

1. Warm up: After printer initialization, printer warm up starts, and the heater lamp turns on untilthe upper fusing roller’s temperature reaches approximately 172º C (342º F).

2. Standby: In standby mode, the upper fusing roller’s temperature is controlled to maintain 156º C(313º F). When this condition continues for 3 minutes, the printer goes into standbymode at low temperature.

3. Print cycle: When the printer receives the printing command from the controller, the upperfusing roller is controlled to maintain 172º C (342º F).

4. Standby at low temperature: The upper fusing roller is controlled to maintain 112º C (234º F).

C180 MAIN

IC201

77

54

75

Analog Voltage Detected by theThermistor (TH1)

5 VDC

L

H

IC202B56

4

L

H

H H

23

1IC202A

4 3

L

L H1:ONH H1:OFF

12

1

5

1

5

TH1

Thermistor

PWB-E 123

H1

TF1

Heater Lamp

Thermal Fuse

Heater LampON/OFF Signal

CN202

CN207

CN1E

CN3E

Figure 2-13. Fuser Control Circuit

Temperature (Degrees C)

172

156

112

Power On

Warm up Standby Standby with LowTemperature

Time

When a print is made immediately after warm up

Figure 2-14. Temperature for Fuser Control Procedure


2-10 Rev. A

If any of the following conditions are detected, the printer indicates a fuser error:

1. If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec.after warm up. (This error applies only when the thermistor detects a temperature of 90º C (194º F)or less.)

2. If the thermistor detects that the temperature has not reached 172º C (342º F) within 60 sec. afterwarm up.

3. Except in pause mode (see the note below), if the thermistor detects that the temperature in theidle state has fallen to 80º C (176º F) or lower for 50 msec., or the temperature during printing hasfallen to 133º C (271º F) or lower.

4. The thermistor detects that the temperature has exceeded 193º C (379º F) for 50 msec. duringtemperature control.

Note: In Pause Mode, the control temperature is decreased to save power in the idle state, theheater lamp is turned OFF.

Thermo fuse TF1 cuts power if the temperature of the fusing section rises to an abnormally high level (over200° C, 392° F).

2.1.2.4 Scanner Motor Control

Figure 2-16 is the scanner motor (M2) control circuit. The scanner motor is driven while it receives thePOLYGON CTL signal. Motor rotation speed is 8622 rpm.

If the any of following conditions are detected, the printer indicates a scanner motor error:

1. The SSCAN signal has not been given once within 1 sec. after the scanner motor is energized.2. The number of scanner motor rotations has not stabilized within± 0.5 rpm by 4.2 sec. after the

motor is energized.3. The number of scanner motor rotations has exceeded± 3% for more than 0.5 sec. after the motor

is energized, even if the rotation number stabilizes within± 0.5 rpm.

+24VGND2

54321CN210

C180 MAIN BoardM2 Scanner Motor

NC

+5VP_CTL

Figure 2-15. Scanner Motor Control Circuit


Rev. A 2-11

2.1.2.5 Laser Diode Drive

Figure 2-16 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA,LDAPC1, and LDAPC2) from the main board (C180 MAIN).

The LDATA signal is the laser on/off signal. When it is LOW, the laser emits, and when it is HIGH, thelaser stops emitting.LDATA is the combination of the two signals in the figure below. If theVIDEO or theFORCED LASER DIODE ON signal is activated (LOW), theLDATA signal will be active. TheVIDEOsignal is an image signal sent from the video controller circuit. The FORCED LASER DIODE ON signal isa laser emission signal to apply the laser beam to the SOS sensor.

The laser diode is forcibly activated after scanner motor M2 turns on. At this time, laser emission power isadjusted. LDAPC1 and LDAPC2 are the laser emission power adjust signals; they are analog signals.LDAPC1 is a tuning, and LDAPC2 is a fine tuning signal.

If either of the following conditions is detected, the printer indicates a laser error:

The LDAPC1 signal or LDAPC2 signal has been out of the specified range while laser power is adjusted.

SSCANLD_CTL

LDAPC1LDAPC2

L DATA

C180 MAIN Board

LDSOS(PWB-D)

Laser Diode

SOS Sensor

SOS Mirror

Figure 2-16. Laser Diode Drive Circuit

L DATA

Forced Laser Diode ON

VIDE Ofrom the VideoController Circuit(C180 MAIN)

Figure 2-17. LDATA Generation Circuit

Scanner Motor On

LDATA

LDAPC1

LDAPC2

P_CTL

Figure 2-18. Laser Emission Power Adjustment Timing


2-12 Rev. A

2.1.2.6 Bias Voltages and Laser Drive Timing

Figure 2-19 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developingbias voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltagesupply board (PWB-F). If the printer detects a case-open condition, the interlock switch is set to off, whichcuts the +24 VDC, which, in turn, cuts the bias voltages.

These bias voltages are controlled by the main board (C180 MAIN). TheHV-T signal is the image transferbias voltage control. While this signal is LOW, the image transfer electrode comb is charged to from +3 to+6K VDC by the high-voltage supply circuit.HV SEL1 andHV SEL2 are image transfer bias level controlsignals.

The HVB signal is the digital signal for developing bias voltage control. This signal controls the bias on/off.The BIAS MON signal controls the bias voltage level (–300 V to –375K VDC) using pulse data. The imagedensity is controlled by the developing bias voltage level.

+24 VDC

InterlockSW

Power SupplyBoard(PWB-E)

+24 VDC

HV-C

HV-THV SEL1

Image TransferBias 3K to 6 K VDC

DevelopingBias-270 to -370 VDC

Drum Charge-2.0 K VDC

MainBoard(C180 MAIN)

High Voltage SupplyBoard(PWB-F)

Toner Doctor BladeBias -500 VDC

HV SEL2HV B

BIAS MON

Seal Bias -250 VDC

PWB-S

Figure 2-19. High-Voltage Supply Block Diagram


Rev. A 2-13

Figure 2-20 shows the print process.

Figure 2-21 shows the start print sequence. The printer’s engine starts printing when it receives thePRINTsignal from the video controller circuit.

Figure 2-22 is the end of the print sequence.

Brush Roller Charging

Laser Exposure

PC Drum

Image Transfer

Development

Figure 2-20. Print Process

[m sec.]

PrintCommand

Polygon Motor(M3)

Paper Take-upSensor (PC1)

Paper Take-upSolenoid(SL1/2)

Main Motor(M1)

Drum Charge

LaserExposure

Development

ImageTransfer

20

200

500300

2310

150

500

260

1st:770, 2nd:2820

1st: 790 to 13002nd: 2670 to 3080

480

1st: 15102nd: 1680

Normal M3 Rotation

4000

Figure 2-21. Print Sequence (Start)

[m sec.]

Polygon Motor(M3)

Main Motor(M1)

Drum Charge

LaserExposure

Development

ImageTransfer

Paper ExitSensor (PC3) 5160

850

480

Figure 2-22. Print Sequence (End)


2-14 Rev. A

2.1.2.7 Fan Motor Control

The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates duringprinting. When printing ends, the fan motor stops after 3 min.

If the following condition is detected, the printer indicates a laser error:

The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.

2.1.2.8 Power Supply Circuit Function and Safety Protection

The printer’s power supply board (PWB-E) supplies the +5 VDC and +24 VDC. The +24 VDC is used asthe bias voltage supply, main motor (M1) drive, scanner motor (M2) drive, fan motor (M3) drive, andsolenoid drive. For safety protection, the +24 VDC line is cut when the interlock switch (case open switch)is off.

AC IN

InterlockSW

+24 VDC

+5 VDC

FG

SG

Power Supply Board(PWB-E)

Figure 2-23. Power Supply Circuit Block Diagram


Rev. A 2-15

2.2 PARALLEL INTERFACE CONTROLLER OPERATION

The parallel interface controller section converts from a bidirectional parallel interface to a video interface.The parallel interface controller section is in the C180 MAIN board.

2.2.1 C180 MAIN Board Operation

Figure 2-25 shows a block diagram of parallel interface controller section of the C180 MAIN board.

C180 MAIN Board

Parallel Interface Controller Section

Engine Controller Section

Figure 2-24. Parallel Interface Controller Section

E05B23(U8)

4M DRAM(U4)

BidirectionalParallel I/F

Engine ControllerSection

Figure 2-25. C180 MAIN Board Block Diagram


2-16 Rev. A

Table 2-1 lists the functions of the main elements of the video controller section in the C180 MAIN board.

Table 2-1. Functions of C180 MAIN Board Main Elements

Element Location Function

E05B23 ASIC U8This ASIC contains the following functions:

Changing from parallel I/F to video I/F.DRAM management (refresh control, RAS/CAS control).

DRAM U4 These DRAMs are used as the working area of the E05B23.


Rev. A 2-17

Chapter 3 Disassembly and Assembly

Table of Contents

3.1 GENERAL INFORMATION 3-13.1.1 Precautions for Disassembly/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.3 Small Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23.1.4 Service Checks after Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2 DISASSEMBLY AND ASSEMBLY 3-43.2.1 Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.1.1 Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.2.2 Removal of the Controller Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2.2.1 Main Board (C180 MAIN Board) Removal . . . . . . . . . . . . . . . . . . 3-53.2.3 Disassembling the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.1 Optical Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.2.3.2 Image Transfer Roller Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.2.3.3 Upper Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.2.3.4 High-Voltage Supply Board (PWB-F) Removal . . . . . . . . . . . . . . 3-103.2.3.5 Power Supply Unit (PWB-E) Removal. . . . . . . . . . . . . . . . . . . . . 3-113.2.3.6 Fusing Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-123.2.3.7 Fusing Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

List of Figures

Figure 3-1. Removing the Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Figure 3-2. Removing the Shield Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-3. Removing the C169 MAIN-B Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5Figure 3-4. Removing the Optical Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6Figure 3-5. Removing the Image Transfer Unit -1. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-6. Removing the Image Transfer Unit -2. . . . . . . . . . . . . . . . . . . . . . . . 3-7Figure 3-7. Moving the Image Transfer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-8. Reinstalling the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Figure 3-9. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-10. Removing the Upper Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Figure 3-11. Removing the PWB-F Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-12. Removing the PWB-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Figure 3-13. Removing the PWB-E Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-14. Removing the PWB-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11Figure 3-15. Gear and Spring Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-16. Removing the Fusing Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . 3-12Figure 3-17. Removing the Harness Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-18. Removing the Fusing Entrance Guide . . . . . . . . . . . . . . . . . . . . . 3-13Figure 3-19. Removing the Fusing Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-20. Roller Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14Figure 3-21. Removing the Heater Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15Figure 3-22. Removing the Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16Figure 3-23. Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16Figure 3-24. Removing the Paper Separator . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-25. Paper Exit Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17Figure 3-26. Removing the G-Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-27. Removing the Upper Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-18Figure 3-28. Removing the Lower Fusing Roller . . . . . . . . . . . . . . . . . . . . . . . 3-19Figure 3-29. Removing the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

List of Tables

Table 3-1. Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Table 3-2. Abbreviations Used for Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Table 3-3. Screw Types and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Table 3-4. Checks after Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.1 GENERAL INFORMATION

This chapter describes disassembly/assembly procedures to use to replace the main assemblies of theEPL-5500W.

3.1.1 Precautions for Disassembly/Assembly

Follow the precautions below when disassembling/assembling the printer.

WARNING

❒ Disconnect the power cord before disassembling/assembling the printer.❒ Be sure to handle the fusing unit carefully, because the unit remains hot for a while afterthe printer stops printing.❒ If it is necessary to plug in the power cord and operate the printer after disassembling it,please be careful of the following:1.Keep your hands and clothing well away from operating or rotating parts (such asrollers, fan motors, etc.).2.Never touch electric terminals or high-voltage components (such as the charger and thehigh-voltage unit).

CAUTION

❒ Do not disassemble the photoconductor unit and toner cartridge.❒ If the photoconductor unit is removed from the printer, do not place it in direct sunlight.❒ Do not disassemble the optical unit.❒ Never turn power on if the optical unit is not installed.❒ To prevent damage to ICs from static electricity, do not touch the ICs on the circuitboard or the terminals of peripheral electrical components with your hands.❒ Use only the recommended tools to ensure safe and efficient maintenance work.Inappropriate tools may damage the machine.❒ Never open the upper unit until the main motor stops completely. Otherwise, the gearsmay be damaged.❒ When transporting the printer, remove the photoconductor unit and toner cartridge fromthe printer.❒ When transporting the printer a long distance, pack up the printer using the originalpacking material.

3.1.2 Tools

Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.

Table 3-1. Tools

Name Commercially Available? Part No.

Philips screwdriver no. 2 Yes B743800200Regular screwdriver Yes B743000100Tweezers Yes B641000100Soldering iron Yes B740200100Round-nose pliers Yes B740400100

EPL-5500W Service Manual Disassembly and Assembly

Rev. A 3-1

3.1.3 Small Parts

In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and3-3 list these abbreviations.

Table 3-2. Abbreviations Used for Screws

Abbreviation Part Name

CP Cross-recessed Pan headCC Cross-recessed Cup headCP(O) Cross-recessed Pan head with Outside-toothed lock washerCP(S)(P1) Cross-recessed Pan head with Spring lock washer and 1 Plain washerCCB Cross-recessed Cup head BindSCB Slotted Cross-recessed B-tightSCB(S)(P1) Slotted Cross-recessed Bind with Spring washer and 1 Plain washer

Table 3-3. Screw Types and Abbreviations

HeadBody Washer

(Assembled)Top Side

1.Cross-recessedhead

2.Slotted Cross-recessed head

1.Bind

2.Pan

3.Cup

1.Normal

—————-

2. B-tight

1.Plain washer 1

2.Outside-toothedlock washer

3.Spring washer

Disassembly and Assembly EPL-5500W Service Manual

3-2 Rev. A

3.1.4 Service Checks after Repair

Check the repaired unit using the following list on completion of servicing.

Table 3-4. Checks after Repair

Item Location Checkpoint Check

Operation

Control panel Do all LEDs and buttons function normally?Heater lamp Does the heater lamp turn on normally?Test Page Is the test page printed normally?Data print Does data print in all modes?

Adjustments Print positionIs the gap between the top edge of the paper andthe horizontal line in the adjustment printing sheetprint exactly 4.2 mm (0.17 inch).

Cleaning

Is toner and dust removed from the paper path?Is the paper take-up roller cleaned?Is the roller in the fusing unit cleaned?Is the outer surface of the printer clean?

PackingAre the consumables removed from the printer?Is the unit packed securely?Are accessories packed also?


Rev. A 3-3

3.2 DISASSEMBLY AND ASSEMBLY

This section describes and illustrates procedures for removing and disassembling components of theEPL-5500W. Cleaning is described in Chapter 6. The assembly procedures are not described, except forspecial notes where necessary, because assembly can be accomplished by performing disassembly in reverse.

3.2.1 Housing Removal

This section describes how to remove the cases and the rear frame.

3.2.1.1 Case Removal

1. Push the upper unit lock release button, and open the upper unit.

2. Remove each cover in the following order.

ASSEMBLY POINT

When reinstalling each cover, securely insert the protrusions for the cover into the cutouts in theprinter frame.

2. Front Cover

1. Left cover

3. OperationCover

4. Rear Cover

Upper unit

Upper unit lockrelease button

Figure 3-1. Removing the Housing


3-4 Rev. A

3.2.2 Removal of the Controller Section

The control section is comprised of the controller board (the C180 MAIN board).

3.2.1.1 Main Board (C180 MAIN Board) Removal

1. Turn the printer so that its right side faces you.

2. Remove the right cover.

3. Remove 2 screws, and then remove the shield case.

4. Disconnect all connectors on the C180 MAIN board.

5. Remove the 5 screws for the C180 MAIN board.

6. Remove the C180 MAIN board.

Figure 3-2. Removing the Shield Case

Figure 3-3. Removing the C180 MAIN Board


Rev. A 3-5

3.2.3 Disassembling the Engine

This section describes disassembling the engine, including the high-voltage unit (PWB-F) and power supplyboard (PWB-E).

3.2.3.1 Optical Unit Removal

CAUTION

❒ Do not touch the optical unit, except during replacement.❒ Do not open the unit under any conditions.❒ Do not remove the circuit board from the optical unit under any conditions.

1. Open the top cover.

2. Remove the right cover, left cover, and front cover. (Refer to Section 3.2.1.1.)

3. Remove the cover shield plate.

4. Disconnect connectors CN205 and CN210 from the C180 MAIN board.

4. Remove the 6 screws from the optical unit.

5. Remove the optical unit.

Figure 3-4. Removing the Optical Unit


3-6 Rev. A

3.2.3.2 Image Transfer Unit Removal


2. Remove harness cover A. (Refer to Section 3.2.3.3.)

3. Remove the 2 screws and holders at both ends of the image transfer unit.

4. Disconnect the 2 connectors and remove the unit.

Figure 3-5. Removing the Image Transfer Unit - 1

Figure 3-6. Removing the Image Transfer Unit - 2


Rev. A 3-7

ASSEMBLY POINT

After reinstalling the image transfer unit, check that the unit smoothly moves up and down.

5. Remove the electrode comb.

ASSEMBLY POINT

When reinstalling the electrode comb, be careful of the direction of installation. Install theelectrode comb so that the comb terminal faces the image transfer roller drive gear.

Figure 3-7. Moving the Image Transfer Unit

Figure 3-8. Reinstalling the Electrode Comb


3-8 Rev. A

3.2.3.3 Upper Unit Removal

1. Open the upper unit.

2. Remove the right cover and left cover. (Refer to Section 3.2.1.1.)

3. Disconnect connectors CN202, CN208, and CN211 from the C180 MAIN.

4. Remove harness covers A and B, and pull CN1 out from the PWB-E board.

5. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

6. Slide and remove the unit as shown in the illustration.

A

B

Figure 3-9. Removing the Harness Cover

Figure 3-10. Removing the Upper Unit


Rev. A 3-9

3.2.3.4 High-Voltage Supply Board (PWB-F) Removal


2. Remove 1 screw from the PWB-F cover.

3. Remove the PWB-F cover.

4. Remove the 4 screws from the PWB-F board.

5. Disconnect 2 connectors.

6. Remove the PWB-F board.

Figure 3-11. Removing the PWB-F Cover

Figure 3-12. Removing the PWB-F


3-10 Rev. A

3.2.3.5 Power Supply Unit (PWB-E) Removal

1. Remove the upper unit. (Refer to Section 3.2.3.3.)

2. Remove 6 screws, and remove the PWB-E cover.

3. Disconnect connector CN207 from the C180 MAIN board.

4. Remove 4 screws and 2 screws, and then remove the PWB-E.

Figure 3-13. Removing the PWB-E Cover

Figure 3-14. Removing the PWB-E


Rev. A 3-11

3.2.3.6 Fusing Unit Removal

1. Open the top cover. (Refer to Section 3.2.3.3.)

2. Remove the image transfer unit. (Refer to Section 3.2.3.2.)

3. Remove 1 screw, and remove the drive tension section of the fusing unit.

4. Remove the transport gear.

5. Release the hook for the spring and remove the drive gear section of the fusing unit.

ASSEMBLY POINT

When rehooking the spring, be sure to hook it in the correct position.

6. Remove 2 screws, and remove the fusing guide plate.

drive gear sectionof the Fusing unit

drive transportgear

hook of thespring

drive tension sectionof the Fusing unit

Figure 3-15. Gear and Spring Position

Figure 3-16. Removing the Fusing Guide Plate


3-12 Rev. A

7. Remove the harness cover.

8. Remove the fusing entrance guide.

Figure 3-17. Removing the Harness Cover

Figure 3-18. Removing the Fusing Entrance Guide


Rev. A 3-13

10. Remove 4 screws, and remove the fusing unit.

ASSEMBLY POINT

After reinstalling the fusing unit, check the direction of the bushings on the paper exit roller andthe connection between the roller and the ground plate.

Figure 3-19. Removing the Fusing Unit

Figure 3-20. Roller Position


3-14 Rev. A

3.2.3.7 Fusing Unit Disassembly

This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, and upper fusingroller.

Heater Lamp

CAUTION

Do not touch the glass surface of the lamp with your bare hands.

1. Remove the fusing guide plate. (Refer to Section 3.2.3.8.)

2. Pull the heater lamp out of the lamp holder from the front side.

ASSEMBLY POINT

When reinstalling the lamp, position its voltage indicator to the left side (non-gear end.).

Figure 3-21. Removing the Heater Lamp


Rev. A 3-15

Thermistor

1. Remove the fusing unit. (Refer to Section 3.2.3.6.)

2. Remove the 1 screw, and remove the thermistor.

ASSEMBLY POINT

When reinstalling the thermistor, wire the harness as shown below.

Figure 3-22. Removing the Thermistor

Figure 3-23. Wiring


3-16 Rev. A

Paper Separator


2. Release the lock of the holder, and remove the 3 paper separators.

ASSEMBLY POINT

When reinstalling the paper separators, be careful of their positions, because the middle onediffers from the others.

Paper Exit Sensor


2. Remove the paper exit sensor.

Figure 3-24. Removing the Paper Separators

Figure 3-25. Paper Exit Sensor


Rev. A 3-17

Fusing Roller


2. Remove the 2 G-rings from the fusing unit.

CAUTION

When reinstalling the G-rings:❒ Be careful of the direction.❒ Securely position them into the grooves of the fusing roller.

3. Remove the upper fusing roller drive gear.

4. Remove the upper fusing roller.

Figure 3-26. Removing the G-Rings

Figure 3-27. Removing the Upper Fusing Roller


3-18 Rev. A

5. Take out the lower fusing roller.

Thermal Fuse


2. Remove 2 screws, and remove the thermal fuse.

Figure 3-28. Removing the Lower Fusing Roller

Figure 3-29. Removing the Thermal Fuse


Rev. A 3-19

Chapter 4 Adjustment

Table of Contents

4.1 ADJUSTMENT 4-14.1.1 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

List of Figures

Figure 4-1. Print Position Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-ii Rev. A

4.1 ADJUSTMENTS

This section describes the adjustment procedures for the EPL-5500W. You must perform these adjustmentsafter servicing the printer, especially when any component or part is replaced.

4.1.1 Print Position Adjustment

You can adjust the vertical print position on a sheet of paper by turning the image synchronizing volumecontrol on the main board (C180 MAIN). After replacing a main board, be sure to adjust the print positionusing the procedure below.

1. Connect the EPL-5500W to LPT1 port of PC. And set the A4 size paper.

2. Install the EPL-5500W printer driver.

3. Set paper size to A4 setting byPCL Emulation Front Panel window.

4. Copy the adjustment printing data filelj4a4.bin to c:\ drive.

5. Open theDOS Prompt window.

7. Type thecopy /b lj4a4.bin lpt1: , and thenEnter . Printer print adjustment printing sheet.

8. Check that the registration gap between the leading edge of the sheet and the horizontal line printed onthe page is within the following range:

4.2± 2.5 mm (0.17± 0.1 inches) for a adjustment printing sheet on A4 paper:If the gap is not correct, adjust the print position as described in the next few steps.

9. Turn printer power off.

10. Open the right cover and shield plate. (See Chapter 3.)

11. Adjust the image synchronizing adjustment volume (VR1) on the main board (C180 MAIN) so that thegap for the print position of the horizontal line (down from the top edge of the sheet) becomes 4.2 mm(0.17 inches) .

Turn VR1 clockwise to increase the gap for the print position of the horizontal line.Turn VR1 counterclockwise to decrease the gap.

12. Turn on the printer.

13. Print a adjustment printing sheet again (Step 7) to check the print position.

14. Repeat steps 8 to 13 until the print position is 4.2 mm (0.17 inches).

15. Reattach the shield plate and right case.

4.2 mmLeading Edge

Figure 4-1. Print Position Adjustment

EPL-5500W Service Manual Adjustments

Rev. A 4-1

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW 5-1

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL 5-1

5.3 TROUBLESHOOTING 5-35.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35.3.2 Print Quality Anomaly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

List of Tables

Table 5-1. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Table 5-2. Symptoms and Reference Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Table 5-3. The Printer Does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-4. Both LED Lights Do Not Come On. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-5. Clear Paper Jam (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Table 5-6. Clear Paper Jam (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Table 5-7. Check Toner & Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Table 5-8. Service Error (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6Table 5-9. Service Error (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-10. Service Error (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-11. Service Error (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7Table 5-12. Print Quality Anomalies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

5.1 OVERVIEW

The EPL-5500W has a sophisticated, built-in, self-diagnostic function that reduces troubleshooting time byidentifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems forpage printers, in which even a trivial failure can result in a serious print quality problem.

5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL

This section describes the self-diagnostic function, in which the controller automatically checks the operatingconditions of each component. If any abnormality is detected, the printer driver displays a message in thestatus window.

If an engine error is detected, the printer driver displays a “SERVICE CALL” message. This error messagedoes not display error information details. To isolate the problem more, you must read the engine error statusregister of the printer using a special tool. This tool is program for Windows 3.1.

The procedure for using the program is as follows:

1. Connect the EPL-5500W to the PC’s LPT1 port, and power the printer on.

2. Start Windows 3.1.

3. If you are using the EPL-5500W printer driver, you must change it so that it does not direct output to aprinter. (If you are not using the EPL-5500W printer driver, skip to step 9.)

CAUTION

The tool program cannot run if EPL-5500W printer driver output is directed a printer port inWindows 3.1, because the EPL-5500W printer driver and special tool both use an interfaceprotocol program. The interface protocol program for the special tool cannot be active in Windows3.1 while the interface protocol for the EPL-5500W printer driver is active.

4. Open theMain window in Windows 3.1.

5. Open thePrinters window.

6. SelectEPL-5500W.

7. Click theConnect button to change thePorts: selection in theConnect menu fromLPT1: or LPT2:to FILE:.

8. Select another printer under theInstalled Printers: list, and then click theSet As Default Printerbutton.

9. Run the SLEEKDBG.EXE file for the special tool from the Program Manager. Windows 3.1 opens theCimarosa Debug Tool window.

10. Set thePort to LPT1 in theCimarosa Debug Tool window.

11. Click the Read / Write Register button in theCimarosa Debug Tool window. The SelectProtocol Cimarosa window is opened.

12. Set the protocol toPeppy .

13. Type000D in theAddress box and04 in theData write box. Then click theWrite button.

14. Type000E in the Address box. And then click theRead button. TheData read box displays theerror code.

The error codes are shown in Table 5-1 on the next page.

EPL-5500W Service Manual Troubleshooting

Rev. A 5-1

Table 5-1. Error Codes

Error Code Error Condition

0x02 Fan motor error0x10 Scanner mirror motor error0x13 Scanner mirror motor and fan motor error0x20 Laser light error0x23 Laser light and fan motor error0x31 Laser light and scanner mirror motor error0x40 Fusing unit error0x43 Fusing unit and fan motor error0x51 Fusing unit and scanner mirror motor error0x52 Fusing unit, scanner mirror motor, and fan motor error0x61 Fusing unit and laser light error0x62 Fusing unit, laser light, and fan motor error0x70 Fusing unit, laser light, and scanner mirror motor error0x73 Fusing unit, laser light, scanner mirror motor, and fan motor error

Troubleshooting EPL-5500W Service Manual

5-2 Rev. A

5.3 TROUBLESHOOTING

This section describes troubleshooting abnormal operations and print quality problems.

5.3.1 Troubleshooting of Abnormal Operations

This section describes how to detect malfunctions, and determine their cause, and it suggests what actions totake for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table.

Table 5-2. Symptoms and Reference Tables

Symptom Printer Condition ReferenceTable

The printer does not operate at all.The heater lamp in fusing unit does not come on,and so neither LED light is on.

5-3

“Status not available” or “Checkprinter / cable” is displayed.

“Status not available” or “Check printer / cable”is displayed by the printer driver interface.

5-4

“Clear paper jam” is displayed.

“Clear paper jam” is displayed by the printerdriver interface during power on.

5-5

“Clear paper jam” is displayed by the printerdriver interface during printing.

5-6

“Check Toner & Cover” isdisplayed.

“Check Toner & Cover” is displayed by theprinter driver interface.

5-7

“Service Call” is displayed.

A fusing unit error is detected.(Refer to Section 5.2)

5-8

A fan motor error is detected.(Refer to Section 5.2)

5-9

A scanner motor error is detected.(Refer to Section 5.2)

5-10

A laser light error is detected.(Refer to Section 5.2)

5-11


Rev. A 5-3

Table 5-3. The Printer Does Not Operate at All

Cause Step Checkpoint Finding Solution

Connector CN207 on theC180 MAIN board may bedisconnected.

1Is connector CN207 on theC180 MAIN boarddisconnected?

YesConnect CN207on the board.

The fuse on the PWB-Eboard may be blown.

2Has the fuse blown on thePWB-E board?

Yes Replace the fuse.

PWB-E board may be dead. 3

With power on, is there anoutput of +5 VDC between pin4 (+) and pin 3 (–) for CN207on C180 MAIN board?

NoReplace thePWB-E board.

C180 MAIN board may bedead.

4 — —Replace the C180MAIN board.

Table 5-4. Both LED Lights Do Not Come On


The C180 MAIN board maybe dead.

1If you replace the C180 MAINboard, do the LEDs come on?

YesReplace the C180MAIN board.

Table 5-5. Clear Paper Jam (1)


The paper take-up sensorflag position may beincorrect.

1Is the paper take-up sensorflag position OK?

NoReposition thepaper take-upsensor flag.

The paper exit sensor flagposition may be incorrect.

2Is the paper exit sensor flagposition OK?

NoReposition thepaper exit sensorflag.

The paper take-up sensorconnector may bedisconnected.

3Is the paper take-up sensorconnector disconnected?

Yes Connect it.

The paper exit sensorconnector may bedisconnected.

4Is the paper exit sensorconnector disconnected?

Yes Connect it.

The paper exit sensor maybe bad.

5 — — Replace it.

The paper take-up sensormay be bad.

6 — — Replace it.


5-4 Rev. A

Table 5-6. Clear Paper Jam (2)


The paper take-upsolenoid coils may beopen or shorted.

1

Disconnect CN203 on theC180 MAIN board, and checkthe coil resistance betweenpins 5 and 6 on thedisconnected cable side of theconnector using a multimeter.Is the resistanceapproximately 80 ohms?

NoReplace the papertake-up solenoid.

If the coil is shorted, check thesolenoid drive circuit using theprocedure below:1. Set the multimeter to

voltage.2. Place the (–) terminal of

the multimeter on pin 5of connector CN207 onthe C180 MAIN board.

3. Place the (+) terminal ofthe multimeter on pin 6(GND).

With power on, does themultimeter detect any current?

Yes

Replace the papertake-up solenoidand the C180 MAINboard.

The main motor coilsmay be open or shorted.

2

Disconnect CN206 on theC180 MAIN board, and checkthe coil resistance betweenpins 1 and 2 and between pins3 and 4 (2 points total) on thedisconnected cable side of theconnector using a multimeter.

Pin 1 — Pin 2Pin 3 — Pin 4

Are the resistances of all fourpoints approximately 10 ohms?

NoReplace the mainmotor.

3

If any coil is shorted, check themain motor drive circuit usingthe following procedure:1. Set the multimeter to

voltage.2. Place the (–) terminal of

the multimeter on pins1, 2, 3, or 6 of CN206on the C180 MAINboard.

3. Place the (+) terminal onpin 2 of CN207 on theC180 MAIN board(GND).

With power on, does themultimeter detect current?

YesReplace the C180MAIN board.

Continued on next page


Rev. A 5-5

Table 5-6. Clear Paper Jam (2) (Continued)


Paper take-up sensor flagposition may be incorrect.

4Is the paper take-up sensorflag position incorrect?

YesReseat the papertake-up sensor flag.

Paper take-up roller maybe bad.

5 — —Replace the papertake-up roller.

Table 5-7. Check Toner & Cover


The interlock switch leveris bad.

1Does the switch turn on whenthe case is closed?

NoReplace theinterlock lever.

The interlock switch maybe bad.

2Does the switch toggle?(Check with a multimeter.)

NoReplace theinterlock switch.

The PWB-E board may bedead.

3

With power on, is there anoutput of +24 VDC betweenpin 1 (+) and pin 2 (–) forCN207 on C180 MAIN board?

NoReplace the PWB-Eboard.

Table 5-8. Service Error (1)


The connector for thethermistor may bedisconnected.

1Is the thermistor connectordisconnected?

Yes Connect it.

The C180 MAIN boardmay be bad.

2Does the heater lampremain lit up until the erroroccurs?

YesReplace the C180 MAINboard.

The heater lamp orthermal fuse in the fusingunit may be bad.

3Does the heater lampcome on at power on?

NoReplace the heater lampor thermal fuse in thefusing unit.

The PWB-E board maybe dead.

4 — —Replace the PWB-Eboard.


5-6 Rev. A



Connector CN211 on theC180 MAIN board may bedisconnected.

1Is CN211 on the C180 MAINboard disconnected?

Yes Connect it.

The fan motor may be bad. 2 — — Replace it.



The optical unit may be bad. 1 — —Replace theoptical unit.

The C180 MAIN board maybe bad.




The optical unit may bebad.

1 — —Replace the opticalunit.

The C180 MAIN boardmay be dead.



Rev. A 5-7

5.4.2 Print Quality Anomalies

This section describes how to isolate possible causes of a print quality problem.

Table 5-12. Print Quality Anomalies

Symptom Possible Cause Part Name Check Item Remedy

Low image density Poordevelopment

PWB-F board —Replace the PWB-Fboard.

Image transferproblem

Image transferunit

Check to see if thesurface of imagetransfer unit isdamaged.

Replace the imagetransfer unit.


Defective PCdrum

Photoconduc-tor unit

—Replace thephotoconductor unit.

Improper printdensity setting

— —Adjust the printdensity using theprinter settings.

Foggy background Poor develop-ment

Tonercartridge

—Replace the tonercartridge.

Impropercharging

Drum charge

—Replace the PWB-Fboard.

Check the wiring ofthe PC drum chargingbias line.

Replace thephotoconductor unit.




5-8 Rev. A

Table 5-12. Print Quality Anomalies (Continued)


Blank print

Poordevelopment

Imagingcartridge

Check whether thetoner cartridge isinstalled properly.

Reinstall the tonercartridge.


Impropercharging


Poor imagetransfer

Image transferunit

Check the surface ofthe image transferunit.

Replace the imagetransfer unit.




Defective opticalunit

Optical unit —Replace the opticalunit.

Black printImpropercharging


—Replace thephotoconductor unit.


Poordevelopment

Tonercartridge


PWB-F boardReplace the PWB-Fboard.



Defective opticalunit

Optical unit —Replace the opticalunit.

White/black linesand bands.

Impropercharging


—Replace the imagingcartridge.

Poordevelopment


Tonercartridge


Dirt on the fusingroller

Fusing roller — Clean the fusing roller.


Rev. A 5-9

Table 5-12. Print Quality Anomalies (Continued)


Toner smudges onthe back side of thesheet.

Impropercharging

PWB-F —Replace the PWB-Fboard.

Poordevelopment


Improper fusing Fusing unit —Replace the fusingunit.

Offset print

Improper fusing Fusing unit —Replace the fusingunit.

White spotsPoor imagetransfer

Image transferunit

—Replace the imagetransfer unit.



5-10 Rev. A

Chapter 6 Maintenance

Table of Contents

6.1 MAINTENANCE 6-16.1.1 User Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.1.1.1 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1.1.2 Replacement of Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6.1.2 Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.1.2.1 Periodic Service Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36.1.2.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

List of Figures

Figure 6-1. Position of the Special Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Figure 6-2. Cleaning the Electrode Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

List of Tables

Table 6-1. Periodic Service Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3Table 6-2. Cleaning Parts and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-ii Rev. A

6.1 MAINTENANCE

The EPL-5500W is a page printer that uses an electrophotographic printing method. Unlike most impact orink-jet printers, the key components in the electrophotographic process are integrated into two expendableunits (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential toensure high-quality output. Other maintenance items are also described in this chapter, which is divided intotwo sections: user maintenance (preventive maintenance) and service maintenance (repair).

6.1.1 User Maintenance

Users can achieve maximum print quality from the printer by following the procedures below:

6.1.1.1 Cleaning

This section describes the cleaning required for optimal print quality.

❒ External Cleaning

Be sure to disconnect the printer from the power outlet before cleaning it. Wipe the cover and external partsof the printer with a damp cloth that has been soaked in a neutral cleaning solution.

❒ Internal Cleaning

Be sure the printer has been disconnected from the power supply and that the fusing unit has cooled down. Ifthe electrode comb of the image transfer unit is dirty, clean it with a special tool, using the following steps:

1. Pick up the electrode comb cleaner from the upper unit.

2. Wipe the electrode comb surface from end to end with the electrode comb cleaner several times.

Figure 6-1. Position of the Special Tool

Electrode Comb Cleaner

Cleaner Section

Pre-image Transfer Roller

Image Transfer RearGuide

Figure 6-2. Cleaning the Electrode Comb

EPL-5500W Service Manual Maintenance

Rev. A 6-1

6.1.1.2 Replacement of Consumables

This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5%print ratio.

If printed images become faint, remove the toner cartridge and gently shake it. This will distribute the tonerand may make the images darker. If the image is still too light, replace the toner cartridge cartridge.

If the printed image remains faint after you have replaced the toner cartridge, change the photo-conductor unit.

Maintenance EPL-5500W Service Manual

6-2 Rev. A

6.1.2 Service Maintenance

This section describes the periodic service maintenance and the cleaning required.

6.1.2.1 Periodic Service Maintenance

The following units need service maintenance periodically, because they are subject to functionaldeterioration as the total number of printed pages increases, resulting in bad print quality.

Table 6-1. Periodic Service Maintenance

Unit Service Interval

Image transfer unit Approx. 100,000 pages

Fusing unit Approx. 100,000 pages

The service interval listed above is only a reference value. You do not need to perform service maintenanceexactly at this time.

6.1.2.2 Cleaning

Some parts of this printer require regular cleaning. Clean each part using the specified method and tools.(Refer to Chapter 3 for disassembly procedures.)

Table 6-2. Cleaning Parts and Procedures

Parts Name Cleaning Procedure

Paper take-up roller Wipe the surface with a dry soft cloth.

Upper fusing roller (in fusing unit)Dip a soft cloth in silicon oil and wipe the dust off.

Lower fusing roller (in fusing unit)

Thermistor (in fusing unit) Dip a soft cloth in denatured alcohol and wipe thedust off.Paper separator and rollers (in fusing unit)

EPL-5500W Service Manual Maintenance

Rev. A 6-3

Maintenance EPL-5500W Service Manual

6-4 Rev. A

Appendix A Reference Materials

Table of Contents

A.1 CONNECTOR PIN ASSIGNMENTS A-1A.1.1 Main Board (C180 MAIN-B Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.2 CIRCUIT DIAGRAM A-7

A.3 CIRCUIT BOARD COMPONENT LAYOUT A-12

List of Figures

Figure A-1. Connector Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1Figure A-2. C180 MAIN Circuit Diagram (1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-7Figure A-3. C180 MAIN Circuit Diagram (2/2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-9Figure A-4. PWB-E (120V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10Figure A-5. PWB-E (220/240V) Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . A-11Figure A-6. C180 MAIN Component Layout (Side A) . . . . . . . . . . . . . . . . . . . A-12Figure A-7. C180 MAIN Component Layout (Side B) . . . . . . . . . . . . . . . . . . . A-13

List of Tables

Table A-1. Board Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2Table A-2. CN2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3Table A-3. CN202 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-4. CN203 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-5. CN204 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-6. CN205 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-7. CN206 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4Table A-8. CN207 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-9. CN208 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-10. CN209 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-11. CN210 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5Table A-12. CN211 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

A.1 CONNECTOR PIN ASSIGNMENTS

Figure A-1 illustrates the interconnection of the primary components. Table A-1 gives the size and adescription of each connector.

1234

M 1

Main Motor

5432

M 2

Poly gon Motor

1234

1

C N 1 M

CN206ϕAϕAϕBϕB

POLYGON CTL5 VD CG N D24 VDCN C

12

M 3

Fan Moto r CN211FA N24 VDC

CN 2 1 0

1231

23C N 3 S

AN ODE (PC1)G N DP C3

P C 3

CN 2 0 8Paper Exit Sensor

1231

23CN1S

ANODE (PC1)G N DPC 1

P C 1

CN203Paper Take-up Sensor

456

N C24 VDCFE E D1

S L 1 121

2

Paper Take-upSolenoid

C N2S

Fus ing Rol le rTher mistor

TH 112

THE RMIS TOR5 VD C

CN202

123

H V CHV THV SEL1

456

HV SEL2H V BB IAS MON

78

12345678

PWB- S87654321

CN204

PWB- F

HighVo ltageUn it

87654321

G N D24 VDC

CN1F

ImageTransferHousing

Imag eTransferCharger

123

24 VDCFE E D2N C

456

5 VD CG N DP E MP2

78

PSIZE 02NDBIN

910

mm/ inch esUNIVERS AL

118

CHE CK 1

PWB- A87654321

CN1A

1 211109

CN209

12

S L 2

Paper Take-upSo leno id

24 VDCFE E D2

2nd Paper Feed ingUn it ( Optional)

CHE CK 2

7654321

1234567

PWB - D

CN205 C N 1 D

Laser DiodeDr ive Board

12345

12345

D C 5 VL DAT A

G N DLD APC1 (LDVR1)LD APC1 (LDVR2)

C O

S SCAN

CN207

P WB -E

123

H 1

T F 1

Fus ing Rol le rHeate r Lamp

Fusing Roller Thermal Fuse

CN1ECN3E

24 VDCG N DG N D

5 V DC

FUS E R L AMP

InterlockSwitch

InletBo ar d

Power SW

Inlet

PowerUn it

H EAT NN C

HEA T L

C180 MAINBoard

H O STP C

C N 2

Figure A-1. Connector Connections

EPL-5500W Service Manual Appendix

Rev. A A-1

Table A-1. Board Connector Summary

Connector Description Pins Reference

Main Board (C180 MAIN Board)CN1 Video interface (not used) 20 pins —CN2 Centronics parallel interface 36 pins Table A-2

CN202 Connector for thermistor 2 pins Table A-3

CN203Connector for paper take-up solenoid and paper take-upsensor

6 pins Table A-4

CN204Connector for high-voltage supply board (PWB-S and PWB-Fboard)

8 pins Table A-5

CN205 Connector for optical unit 7 pins Table A-6CN206 Connector for motor 4 pins Table A-7CN207 Connector for power supply board (PWB-E board) 5 pins Table A-8CN208 Connector for paper exit sensor 3 pins Table A-9CN209 Connector for lower paper cassette 12 pins Table A-10CN210 Connector for optical unit 5 pins Table A-11CN211 Connector for fan 2 pins Table A-12

Power Supply Board (PWB-E Board)CN1 Connector for AC power inlet 4 pins —CN2 Connector for main board 5 pin Table A-8CN3 Connector for heater lamp 3 pins —

High-Voltage Supply Board (PWB-F Board)CN1 Connector for main board 8 pins Table A-5CN2 Connector for paper take-up sensor 3 pins —

Appendix EPL-5500W Service Manual

A-2 Rev. A

A.1.1 Main Board (C180 MAIN Board)

Table A-2. CN2 Pin Assignments

Pin No. Signal Name I/O Description

1 STROBE I STROBE signal2 DATA1 I Data bit 13 DATA 2 I Data bit 24 DATA 3 I Data bit 35 DATA 4 I Data bit 46 DATA 5 I Data bit 57 DATA 6 I Data bit 68 DATA 7 I Data bit 79 DATA 8 I Data bit 810 ACKNLG O ACKNLG signal11 BUSY O BUSY signal12 PE O PE signal13 SLCT O SLCT signal14 AUTO-FEED I AUTO-FEED signal15 NC — Not connected16 GND — GND

17 CHASSISGND — CHASSIS GND

18 NC — Not connected19 GND — GND20 GND — GND21 GND — GND22 GND — GND23 GND — GND24 GND — GND25 GND — GND26 GND — GND27 GND — GND28 GND — GND29 GND — GND30 GND — GND31 INIT I INIT signal32 ERROR O ERROR signal33 GND — GND34 NC — Not connected35 +5 — +5 VDC36 SLCT IN I SLCT IN signal


Rev. A A-3



1 +5 — +5 VDC2 TH I Fuser temperature



1 PS1 I Paper take-up sensor2 GND1 — Ground3 PS1 I Paper take-up sensor4 NC — Not connected5 +24V — +24 VDC6 FEED1 O Paper take-up solenoid drive



1 HV-C —2 HV-T I3 HV-S —4 HV-S2 —5 HV-B6 BIAS-M O7 GND2 — Ground8 +24 — +24 VDC



1 SSCAN I Horizontal synchronous signal2 LD-CTL I Laser power signal3 LDAPC2 O Laser power adjust 24 LDAPC1 O Laser power adjust 15 GND1 — Ground6 LDATA O Laser data7 +5V — +5 VDC



1 A O Motor phase A2 A O Motor phase A3 B O Motor phase B4 B O Motor phase B


A-4 Rev. A



1 +24V — +24 VDC2 GND2 — Ground3 GND1 — Ground4 +5V — +5 VDC5 FUSER O Heater lamp on



1 PS3 I Paper exit sensor2 PS3 I Paper exit sensor3 GND — Ground



1 +24 V — +24 VDC2 FEED2 O Lower cassette solenoid on3 NC — Not connected4 +5V — +5 VDC5 GND1 — Ground6 PE2 I Lower cassette paper empty7 PSIZ08 PSIZ19 PSIZE210 CHECK111 CHECK212 CHECK3



1 NC — Not connected2 +24V — +24 VDC3 GND2 — Ground4 +5V — +5 VDC5 P-CTL O Polygon motor control



1 +24V — +24 VDC2 FAN O Fan control


Rev. A A-5


A-6 Rev. A

A.2 CIRCUIT DIAGRAMS

Figure A-2. C180 MAIN Circuit Diagram (1/2)


Rev. A A-7


A-8 Rev. A

TO

DX

VID

EO

XH

SY

NC

X

R2

12

2.2

KR

20

82

.2K

1

2

3

4

8

7

6

5

RM

20

13

.3K

R2

11

10K

P5

4/C

NT

R0

15

P7

2/S

CL

K2

9

P5

3/IN

T4

16

P7

1/S

OU

T2

10

P70

/SIN

2 1

1

P00

56

P86

/RT

P4

66

P5

6/D

A1

13

P5

7/D

A2

12

P60

/AN

5

3

P81

/DA

4 7

1

P76

/AN

3

5

P04

52

P7

5/A

N2

6

P6

3/A

N9

/AM

P+

78

P6

4/A

N1

0/A

MP

- 7

7

P3

7 5

7

P77

/AN

4

4

AM

PO

UT

79

P02

54

XIN

30

XO

UT

31

P8

2/R

TP

0 7

0

P8

3/R

TP

1 6

9

P8

4/R

TP

2 6

8

P8

5/R

TP

3 6

7

P0

1 5

5

P0

3 5

3

P0

7 4

9

P2

2 3

8

P2

4 3

6

P3

6 5

8

P4

0 2

9

P4

1 2

8

P4

3/IN

T1

24

P4

7/S

RD

71

20

P5

0/T

OU

T 1

9

P5

1/I

NT

2 1

8

P5

2/I

NT

3 1

7

P6

2/A

N7

1

P8

7/R

TP

5 6

5

P3

36

1

P3

0/R

TP

66

4

P3

1/R

TP

76

3

P3

26

2

P4

2/IN

T0

25

P2

04

0

P21

39

P23

37

P4

6/S

CL

K1

21

P45

/TX

D2

2

P44

/RX

D2

3

RE

SE

T2

7

P1

54

3

P3

46

0

P1

64

2

P1

44

4

P13

45

P10

48

P1

14

7

P1

24

6

P3

55

9

P25

35

P26

34

P27

33

P80

/DA

37

2

P73

8

P0

55

1

P0

65

0

P5

5/C

NT

R1

14

P6

1/A

N6

2

P7

4 7

P1

74

1

VC

C7

3

AM

PV

CC

80

AD

VR

EF

74

P6

5/A

N1

1/D

AV

RE

F7

6

VS

S3

2

AV

SS

75

CN

AV

SS

26

IC2

01

M3

80

7X

R2

072

.2K

C2

39

0.0

1U

+5

V 7

SS

CA

N 1

LD

AT

A 6

LD

AP

C1

4

LD

AP

C2

3

LD

_C

TL

2

GN

D1

5

CN

20

5

11

12

13

IC2

02D

74

HC

02

R2

06

33

R2

54

1K

R2

53

68

0

C2

53

47

00

P

C2

58

0.1

U

8 9 1

0

IC2

02C

74

HC

02

C2

52

10

00

P

R2

96

10

K

R2

91

10

K

TP

20

4T

P

VC

C 7

C 5

GN

D 4

OU

T

6

NC

1

NC

2

NC

3

NC

8

IC2

51

M5

19

53A

FP

C2

57

0.1

UC

20

7

10

P

EP

RD

YX

PR

RD

YX

ET

BS

YX

SR

CL

KX

STS

XC

MD

X

CT

BS

YX

CP

RD

YX

RE

SE

TX

PR

INT

X

PS

3

1

PS

3

3

GN

D

2

CN

20

8

+2

4V

5

NC

4

PS

1

1

PS

1

3

FE

ED

1

6

GN

D1

2

CN

20

3

C2

40

0.0

1U

1

16

IC2

03

A

ULN

20

03

A

R2

13

22

0 1

/4W

R21

42

20

1/4

W

R21

6

47

K

R2

15

47K

C2

55

0.0

1U

C2

56

0.0

1U

C2

54

0.0

1U

40

0m

A

C2

51

10

00

P

1 3 2

VR

20

11

0K

R21

03

.0K

R2

09

1.0

K

C23

81

00

0P

C23

71

00

0P

C23

61

00

0P

C23

51

00

0P

C2

32

10

00

PC

231

10

00P

C2

30

10

00

P

C22

91

00

0P

C2

59

0.1

U

C2

43

0.1

U

PL

AC

E N

EA

R C

N2

05

PL

AC

E N

EA

R C

N21

0

NC

1

+2

4V

2

+5

V 4

P_

CT

L 5

GN

D2

3

CN

21

0

+5

V 2

TH

1

CN

20

2

TP

202

TP

+2

4V

2

FA

N 1

CN

21

1

C20

6

10

00P

R2

27

6.8

1/4

W

20

0m

A

R20

3

3.0

K 1

.0%

C2

14

10

00

P

DT

20

1

FB

1L

3N

R2

26

47

KR

29

5

10

K

C21

60

.01

U

1

2 3

4

8

7

6

5

RM

20

24

.7K

R23

34

.7K

R23

44

.7K

R2

364

7K

+2

4V

1

+5

V

4

NC

3

PE

2

6

PS

IZ0

7

PS

IZ1

8

PS

IZ2

9

FE

ED

2

2

CH

EC

K1

10

CH

EC

K2

11

CH

EC

K3

12

GN

D1

5

CN

209

C2

41

0.0

1U

C2

271

00

0P

C2

26

100

0P

C2

251

00

0P

7

10

IC2

03

G

UL

N20

03

A

2

15

IC20

3B

UL

N2

00

3A

5

12

IC20

3E

UL

N2

00

3A

3

14

IC20

3C

UL

N2

00

3A

C2

19

10

00

P

C2

20

10

00

P4

00

mA

C2

17

10

00

P

C2

18

10

00

P

C2

05

22P

CR

20

18

MH

z

C2

04

22

P

2 3

1

IC2

02

A

74

HC

02

5 6

4

IC2

02

B

74

HC

02

R2

93

10K

IC2

02-

14

4 1

3

IC2

03

D

UL

N20

03

A

C2

03

0.1

U

TP

20

3

TP

TP

20

1

TP

IC2

02-

7

C2

01

220

U/1

6V

FU

SE

R 5

+2

4V

1

GN

D2

2

+5

V 4

GN

D1

3

CN

207

A 1

A 2

B 3

B 4

CN

206

1A

R2

19

1K

R2

17

56

K

C2

108

20

P

C2

08

82

0P

R2

24

2.7

1/4

W

R2

21

1 1

/2W

1A

MA

15

MB

1

E 1

6

C 1

0

T

2

PH

8

I0 9

I1 7

VM

M 3

VM

M1

4

VC

C 6

VC

C1

1

GN

D 4

GN

D 5

GN

D1

2

GN

D1

3

IC2

04

TE

A37

18

SD

P

R2

92

10

K

1A

R2

38

10

KR

23

71

0K

R2

04

39

K

R20

56

.8K

TP

20

5T

P

R2

90

10

K

C21

5

0.1

U

6

11

IC2

03

F

ULN

20

03

AD

201

1S

S2

26

R22

3

10

0K

C2

13

0.0

22U

GN

D

8

NC

9

IC2

03

20

03X

C2

33

10

00

P

C22

41

00

0P

C22

31

000

P

C22

21

00

0P

C2

21

10

00

P

C23

4

10

00P

C2

281

00

0P

C2

42

0.1

U

HV

_S

2

4

+2

4V

8

HV

_C

1

HV

_S

3

HV

_T

2

HV

_B

5

BIA

S_

M

6

GN

D2

7

CN

20

4

C20

20

.1U

MA

15

MB

1

E 1

6

C 1

0

T

2

PH

8

I0 9

I1 7

VM

M 3

VM

M1

4

VC

C 6

VC

C1

1

GN

D 4

GN

D 5

GN

D1

2

GN

D1

3

IC2

05

TE

A3

71

8S

DP

C2

124

7U

35

V

1A

R2

201

K

R21

85

6K

C2

11

820

P

C2

09

820

P

R2

25

2.7

1/4

W

R2

22

1 1

/2W

1A

Figure A-3. C180 MAIN Circuit Diagram (2/2)


Rev. A A-9

LN

F16.3A, 125V

R1

470K

C1

0.22uF125V

NR

1E

NC

271D

-10

Z7D

271

L1Z0408, Z0462

C3

C4

C3

, C4

2200pF

125V

C2

0.1uF

125V

BD

1D

258A50

D2S

860

Th1100-g,M

100 10C,

M10007C

NTH

9D100LA

C19

0.01u250V

R24

100K0.5W

D4

EU

2A, A

GIC

ER

A22-06

R4

220K-180K

0.25W

R5

390K

0.25W

Q1

2SK

1445

2SK

1446

R7

4.7

C5

2200pF125V

+

C5

330u

F2

00V

C8

680p

1kV

500V

R5

222W

L10

ZD

2H

ZS

15

R11

68K

Q2

D1207

C1213

C1815

PC

1P

C81

7

C9

0.0

1uF5

0V

R8

6800.5W

R9

10K

ZD1

HZS

18-20

R10

22K

R25

18K

C10

4700p

F50

V

T1

Z04

96

D2

YG

901C2

D5LC

20U

D3

YG

801C4

D5S

C4M

FMB

-24M

+C

173300uF10V

++

C15

1000uF35V

C1

6100

0uF35V

R27

1.2K0.5W

R19

1.2K0.5W

R20

1.2K0.5W

R26

1.2K0.5W

L9

L7Z0

400

SC

R1

TF3215

2P4M

ZD4

HZS

27Z

D3

HZ

S6

R29

33R

3033C

21 1uF, 50V

R22

1000.5W

34 2 15

SW

2A

M51662A

531

CN

1

+24V

+24V G

ND

+5V G

ND

+5.1V

H.L

R12

1K0.25W

R21

0.25W

PC

2S

21M

D4

VS

21M

E4F

D1

ER

AG

1-21

1S

S8

1R

283

3

R12

1.2K

C14

0.0

47uF

50V

R1

433

0

PC

1P

C917

IC1

L5431TL431uP

C1093

HA

17431

C1

30.1uF50V

R1

547K

VR

11K

R15

1.8K

C7

0.1uF125

VL11

Z0

068

TRC

TM8415

SM

8GZ47

R2

4.7R3

33

13

CN

353259-0320

NL

Figure A-4. PWB-E (120 V) Circuit Diagram


A-10 Rev. A

+

5

1 2 3

N.

HE

AT

ER

36

0W

L.

1 2 3

N.

HE

AT

ER

36

0W

L.

CN

2

INL1

SW

1W

H1

WH

2

F1

25

0V

5A

C1

25

0V

0.3

3u

F

VS

14

70V

L1

CM

102

L2

CM

102

R1

1/4

W4

70

K

R2

1/4

W4

70

K

C2

250

V2

200

pF

C3

250

V2

200

pF

C4

25

0V

0.1

uF

RC

16

00V

, 1.5

AR

T1

10

C7

40

0V8

2uF

RC

51

20

0V

10

A

RC

512

00V

10

A

+

+

- +

1 2 4 3

ZC

VS

24

70

V

C2

12

50

V0

.1u

F

TH

16

00V

5A

C2

20

.01

uF

R2

11

/2W

1K

R2

21

/2W

33

PI6

1

61

42

R6

91

W1

.2K

CN

1

FU

SE

R L

AM

P

+2

4V

GN

D(+

24

V)

+5

.1V

GN

D(+

5.1

V)

R3

1/2

W4

70

K

R4

1/2

W4

70K

C9

1K

V1

00p

F

R6

2W

10

0

Q1

80

0V

3A

R1

24

.7K

1/4

W

R5

3W

10

0K

D1

800

1A

C8

63

0V

0.0

1u

F

T1

TM

19

9

D2

70V

0.1

5A

C1

00

.03

3u

F

Q2

50

V2

A

VR

12

00

C1

10

.04

7uF

R7

2W

16

R8

2W

16

R9

2W

16

R10

39

0

D3

2.0

-2.2

V

R1

11

00

D4

70

V0

.15

A

+

+

C62

35

V2

20

0u

FR

632

W1

.2K

R6

42

W1

.2K

SW

61

L62

CL

086

C6

41

0V

22

00

uF

+

C65

50

V1

0u

F

R7

3W

IRE

, PE

S

R6

63

W3

3

PI5

1

5 4

1 2

M5

1

R51

100

R5

21

K

C51

4.7

uF

R6

31

.58

K1

%

R5

41

.47

K1

%

D62

28

.2-

29

.6V

D6

14

.7-

4.9

V

D6

37

0V

0.1

5A

D64

70

V0

.15

A

TH

61

40

0V

5A

C6

14

.7u

F

R6

24

7

R6

11

K

R7

02

21

/4WD

651

9.5

-20

.4V

M6

1

7

8

4

6 5

C66

0.1

uF

R71

10

0

R7

23

.9K

Figure A-5. PWB-E (220/240 V) Circuit Diagram


Rev. A A-11

A.3 CIRCUIT BOARD COMPONENT LAYOUTS

Figure A-6. C180 MAIN Component Layout (Side A)


A-12 Rev. A

Figure A-7. C180 MAIN Component Layout (Side B)


Rev. A A-13

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As of October 1995

EPSON

Printed in Japan

95.11-.01-S

epson epl-5500w service manual

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