boss gt 3 repair manual

GT-3 Feb. 1999

1

SERVICE NOTESFirst Edition

Issued by RJA

Copyright 1999 by ROLAND CORPORATIONAll rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION.

17059955 Printed in Japan AA00 (DP)

TABLE OF CONTENTS PageSPECIFICATIONS ............................................................................................... 1PANEL LAYOUT ............................................................................................... 2EXPLODED VIEW ............................................................................................... 3IDENTIFYING VERSION NUMBER ............................................................................................... 6Transmitting / receiving data via MIDI ............................................................................................... 6Factory settings ............................................................................................... 8TEST MODE ............................................................................................... 9BLOCK DIAGRAM ............................................................................................... 15CIRCUIT DIAGRAM (SW BOARD) ............................................................................................... 16CIRCUIT DIAGRAM (1/2) (MAIN) ............................................................................................... 17CIRCUIT DIAGRAM (2/2) (MAIN) ............................................................................................... 18CIRCUIT BOARD (MAIN) ............................................................................................... 19CIRCUIT BOARD (SW BOARD) ............................................................................................... 20ERROR MESSAGE ............................................................................................... 21CHANGE INFORMATION ............................................................................................... 22

Guitar Effects Processor

SPECIFICATIONS AD Conversion

24 bit AF Method 64 times Oversampling Modulation

DA Conversion20 bit 128 times Oversampling Modulation

Sampling Frequency44.1 kHz

Program Memories340: 140 (User) + 200 (Preset)

Nominal Input LevelINPUT: -10 dBmRETURN: -10 dBm

Input ImpedanceINPUT: 1 MRETURN: 220 k

Nominal Output LevelOUTPUT: 0 dBmSEND: -10 dBm

Output ImpedanceOUTPUT: 2 kSEND: 2 k

Dynamic Range100 dB or greater (IHF-A)

Controls< Front >Value dialEffect select buttonsSFX, COMP/LM, WAH, OD/DS,PREAMP/SP SIM, EQ, MOD, DELAY,CHORUS, REVERB, MASTER,PEDAL/ASSIGNExit buttonParameter buttons L/RWrite buttonManual buttonUtility buttonTuner/Bypass buttonNumber pedals 1-4Bank pedals up/downControl pedalExpression pedal

< Rear >Output level knobPower switch

Display16 characters, 2 lines (backlit LCD)

ConnectorsInput jackOutput jacks L(MONO)/RHeadphones jack (stereo mini type)Send jackReturn jackSub expression pedal/Sub control pedal 1,2 jackMIDI Connectors IN/OUT

Power SupplyAC 14 V; Supply AC adaptor(BOSS BRC-120, 230, 240)

Current Draw800 mA

Dimensions487 (W) 222 (D) 97 (H) mm19-3/16 (W) 8-3/4 (D) 3-7/8 (H) inches

Weight4.0 kg/ 8 lbs 14 oz

AccessoriesOwner's Manual English (#G6017276)

Japanese (#G6017277)Quick Start English (#G6017279)

Japanese (#G6017278)AC adaptor BRC-120 (#00899089)

BRC-230 (#00899090)BRC-240A (#00899101)

Euro Converter Plug (230VE only)ECP01-5A (#00905234)

OptionsFoot Switch:FS-5U, FS-5LExpression Pedal:

EV-5 (Roland)FV-300L+PCS-33 (Roland)

MIDI IMPLEMENTATIONEnglish (#17048954)Japanese (#17048953)

* 0 dBm = 0.775 Vrms

(SW BOARD) (1/2) (MAIN) (2/2) (MAIN) (MAIN) (SW BOARD)

AD24AF64

DA20128

44.1 kHz

340140200

INPUT -10 dBmRETURN -10 dBm

INPUT 1 MRETURN 220 k

OUTPUT 0 dBmSEND -10 dBm

OUTPUT 2 kSEND 2 k

100 dBIHF-A

SFX, COMP/LM, WAH, OD/DS,PREAMP/SP SIM, EQ, MOD, DELAY,CHORUS, REVERB, MASTER,PEDAL/ASSIGNLR14UPDOWN

162LCD

L (MONO)R1,2MIDIINOUT

AC 14 V; AC(BOSS BRC-100)

800 mA

487 (W) 222 (D) 97 (H) mm

4.0 kgAC

(#G6017277)

(#G6017276)

(#G6017279) (#G6017278)

(#40232389) (#40121767) (#40019167)ACBRC-100 (#00899078)

FS-5U, FS-5L

EV-5(RolandFV-300LPCS-33(Roland

MIDI (#17048953) (#17048954)

0 dBm = 0.775 Vrms

GT-3 Feb. 1999

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ABCDEFGHIJKLMNOPQRSTUV

PANEL LAYOUTFRONT VIEW

REAR VIEW

PEDAL SWITCH PEDAL(G2187602)

SUPPORT SPRING(G2177103)

PEDAL FOOT(G2357109)

SwitchSKQKAH(13129778)

Keytop D S-KEYTOP MD3H BLK(22495279)

LEDL-312LRD(F5029117)

SwitchSKQKAB(01780101)

TOP COVER(G2017129)

LCD CoverDISPLAY COVER(G2567104)

LCDWD-C1602R-2BLYC(F5029404)

KeytopD S-KEYTOP SX4H BLK(00904256)


KnobD R-KNOB L BLK(22485303)

Encoder EVQ VEM F01 24B(01013223)

KeytopD S-KEYTOP SD4H BLK(00900178)

LEDL-312LRD(F5029117)


PEDAL LABEL (DOWN)(G2217709) PEDAL LABEL (UP)

(G2217711)

VR PEDAL(G2187517)

VR PLATE(G2357112)

LEDGL-3PR8(15029281)

SpacerSPACER 3*6*10(H2369401)

PEDAL LABEL (1)(G2217705)




PEDAL LABEL (CTL)(G2217710)

PEDAL ESCUTCHEON(G2227301)

JackHEC0740-010010(13449728)

KnobP R-KNOB SF-A BLK/LCG(01340412)

VRRK09K12A0 (10kA x2)(01676523)

Jack HSJ0857-01-1210(13449440)

JackHTJ-064-12D(13449150MF)

KnobG S-BUTTON S1H BLK(12499175)

SwitchSDKLA1-B(01676512)

Cord HookCORD HOOK 236-712(22360712)

JackHTJ-064-12I(13449155MF)

BOTTOM COVER(G2817131)

JackYKF51-5054(13429825)

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EXPLODED VIEW[Part]

NO. PART CODE PART NAME DESCRIPTION Q'TYq G2357108 FOOT 6w G2817131 BOTTOM COVER 1e 71235078 MAIN BOARD ASSY (EXG) 1r 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD 1t 22495279 D S-KEYTOP MD3H BLK 249-279(W/WINDOW) 4y 00904256 D S-KEYTOP D S-KEYTOP SX4H BLK 1u 00900178 D S-KEYTOP SD4H BLK 1i F5029404 LCD WD-C1602R-2BLYC 1o G2567103 MAIN ESCUTCHEON 1!0 F3479101 FFC CARD 14P L=80MM 1!1 G3467132 WIRING 16P L=230MM 1!2 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD 1!3 G2017129 TOP COVER 1!4 G2227301 ESCUTCHEON 7!5 G2187602 SWITCH PEDAL 7!6 G2177103 SUPPORT SPRING 7!7 G2357109 PEDAL FOOT 7!8 22360712 CORD HOOK 236-712 1!9 12499175 G S-BUTTON S1H BLK 249-175 1@0 01340412 P R-KNOB SF-A BGLK/LCG 1@1 G2147116 SHAFT STAY 1@2 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD 1@3 G2187517 VR PEDAL 1@4 G2147117 PIN STAY 1@5 G2147115 PEDAL HOLDER 1@6 G2147119 BOLT HOLDER 1@7 G2357110 CUSHION F 1@8 G2357111 CUSHION R 1@9 G2357112 VR PLATE 1#0 G2567104 DISPLAY COVER LCD COVER 1#1 22485303 D R-KNOB L BLK 248-303 1#2 G2217705 PEDAL LABEL(1) 1#3 G2217706 PEDAL LABEL(2) 1#4 G2217707 PEDAL LABEL(3) 1#5 G2217708 PEDAL LABEL(4) 1#6 G2217710 PEDAL LABEL(CTL) 1#7 G2217709 PEDAL LABEL(DOWN) 1#8 G2217711 PEDAL LABEL(UP) 1#9 F3479102 FFC CARD 18P L=115MM 1$0 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD 1$1 12569249S0 LITHIUM BATTERY 220MAH/3V CR2032 (=12569249) 1$2 40016523 INSULOK TIE 100M/M T-18R >

[Screw]NO. PART CODE PART NAME DESCRIPTIONa 40342712 SCREW M36 PAN MACHINE W/SW+SMALL PW BZCb 40013067 SCREW M38 PAN SEMS FE ZCc 40012867 SCREW M38 PAN HEAD DOUBLE SEMS FE ZCd 40012534 SCREW M36 BINDING S-TITE FE BZCe 40342701 SCREW M2.38 BINDING TAP TIGHT P ZCf 40011312 SCREW M38 BINDING P-TITE FE BZCg 40019123 SCREW M38 BINDING S-TIGHT BZCh 40127689 SCREW M310 BINDING TAPTIGHT S TYPE FE BZCi 40342690 HEX BOLT M685 HALF THREAD BZCj 40016001 LOCK NUT M6 U BZCk 40015901 E-RING M2.5 SUSl 40016067 PLAIN WASHER 6131 BZCm 40123545 NUT M9112 (JACK) FE NIn 40016467 JACK WASHER M9.2140.5 FENIo 40016445 NUT (JACK) HAJ-0999-01-190p 40016456 WASHER (JACK) HSJ-0999-01-210q 40011878 M3 EXTERNAL TOOTH WASHER FECM

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GT-3 Feb. 1999

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Note : Consider about the natural environment carefully before through the old lithium battery away when you exchangeto the new one.you exchange to the new one.

NOTE1 : *1 The parts marked # are new (initial parts).NOTE2 : *2 The parts marked have safety-related characteristics.

*1 *2

CASING# G2817131 BOTTOM COVER# G2017129 TOP COVER# G2187517 VR PEDAL for VR PEDAL ASSY

KNOB, BUTTON00904256 D S-KEYTOP SX4H BLK for PANEL SW00900178 D S-KEYTOP SD4H BLK for PANEL SW22485303 D R-KNOB L BLK 248-30322495279 D S-KEYTOP MD3H BLK 249-279(W/WINDOW) for PANEL SW12499175 G S-BUTTON S1H BLK 249-17501340412 P R-KNOBSF-A BGLK/LCG

SWITCH# 01676512 SDKLA1-B PUSH SWITCH SW1 on Main Board# 01780101 SKQKAB TACT SWITCH SW8-SW27 on SW Board

13129778 SKQKAH TACT SWITCH SW1-SW7 on SW Board

JACK, SOCKET13449728 HEC0740-010010 ADAPTOR JACK JK1 on Main Board13449440 HSJ0857-01-1210 PHONE JACK (MINI) JK6 on Main Board

# 13449150MF HTJ-064-12D PHONE JACK (STEREO) JK3 on Main Board# 13449155MF HTJ-064-12I PHONE JACK (MONO) JK4,JK5,JK7-JK9 on Main Board

13429825 YKF51-5054 2PZ MIDI CONNECTOR JK2 on Main Board

DISPLAY UNIT# F5029404 WD-C1602R-2BLYC LCD

POWER SUPPLY UNIT00905234 ECP01-5A EURO CONVERTER PLUG

PWB ASSY# 71235078 MAIN BOARD ASSY# 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD

IC# 01780112 AK4522VF IC (AD/DA) IC12,IC14 on Main Board# 01676501 HD6413006FP IC (CPU) IC1 on Main Board

15289123 M51953AFP-600C IC (RESET) IC4 on Main Board

PARTS LISTCONSIDERATIONS ON PARTS ORDERINGWhen ordering any parts listed in the parts list, please specify the following items in the order sheet.

QTY PART NUMBER DESCRIPTION MODEL NUMBER10 22575241 Sharp key C-20/5015 2247017300 Knob (orange) DAC-15D

Failure to completely fill the above items with correct number and description will result in delayed or evenundelivered replacement.

Ex.

SAFETY PRECAUTION:The parts marked have safety-related characteristics.Use on ly l i s t ed pa r t s fo rreplacement.

15289109 M5216FP-600D IC (OP AMP) IC20 on Main Board15189261 M5218AFP-600E IC (OP AMP) TAPE IC16,IC19,IC21,IC22 on Main Board15289156 M5222FP IC (VCA FLAT) IC17 on Main Board15289106 M5238AFP-600C IC (OP AMP) IC18 on Main Board00565123 M66310P IC (LED DRIVER) IC2 on SW Board01016434 M66312P IC (LED DRIVER) IC1 on SW Board

# F5229803 MX23C4000PC-10 IC MASK ROM (4M DIP) IC3 on Main Board00346445 NJM2100M(TE3) IC (OP AMP) IC13,IC15 on Main Board15289125 PC410KT 178FAY IC (PHOTO COUPLER) IC23 on Main Board15199240 TA78L05S IC (V.RGL) IC10,IC11 on Main Board00892556 TC170C140AF-003 (ESP2) IC (CUSTOM) IC8 on Main Board01122412 TC551001CF-70L IC (SRAM) IC7 on Main Board

# F5259701 TC74HC04AFN GATE IC IC5,IC24 on Main Board# F5259702 TC74HC10AFN GATE IC IC6 on Main Board

00458034 TC75S51F TE85R IC (OP AMP) IC25 on Main Board# F5279510 V53C16256HK50 IC (DRAM 4M) IC9 on Main Board

HYBRID01344056 SI-8501L IC REGULATOR IC26 on Main Board

TRANSISTOR15119132 2SA1015GR(TPE2) TRANSISTOR Q103 on Main Board15309104 2SA1586GR TE85R TRANSISTOR Q16,Q17 on Main Board15119823 2SB-1375-O POWER TRANSISTOR Q32 on Main Board15319108 2SC-3324GR-TE85R TRANSISTOR Q5 on Main Board01019412 2SC2120Y TRANSISTOR Q101,Q102 on Main Board15319107 2SC4116GR-TE85R TRANSISTOR Q1 on Main Board15319115 2SC4213A TE85L TRANSISTOR Q4,Q6-Q10 on Main Board15129844 2SD-2012-O TRANSISTOR Q33 on Main Board15329103T0 2SK880GR-TE85R FET Q2,Q3,Q11 on Main Board15329521 RN1307-TE85R TRANSISTOR Q12,Q13,Q15 on Main Board15329533 RN2307-TE85R TRANSISTOR Q14 on Main Board

DIODEF5019209RT 1N4004 DIODE D101-D104 on Main Board15339121 1SS-301-TE85R DIODE D11 on Main Board15019126 1SS133 T-77 SWITCHING DIODE D1-D27 on SW Board15339120T0 1SS302-TE85R DIODE D4,D6,D8,D9 on Main Board15339119T0 1SS352-TPH3 DIODE D1-D3,D5,D7,D10 on Main Board

# F5029117 L-312LRD LED 8-LED13,LED18-LED27 on SW Board15029281 GL-3PR8 LED 1-LED5 on SW Board

# F5339310 RD10ESAB2 ZENER DIODE D105,D106 on Main Board

RESISTOR# F5399903 100KOHM (F-RANK, 1%) CHIP RESISTOR R23 on Main Board# F3829255 10OHM(2W) CARBON RESISTOR R201 on Main Board# F5399902 18KOHM (F-RANK, 1%) CHIP RESISTER R26,R28 on Main Board# F3829254 47OHM(2W) CARBON RESISTOR R202,R203 on Main Board# F5399901 6.8KOHM(F-RANK 1%) CHIP RESIST0R R25 on Main Board# F5419707 CRN34101J RESISTOR ARRAY RA1-RA3,RA9 on Main Board# F5419704 CRN34102J RESISTOR ARRAY RA6,RA8 on Main Board# F5419705 CRN34103J RESISTOR ARRAY RA5,RA7 on Main Board# F5419706 CRN34104J RESISTOR ARRAY RA4,RA10 on Main Board# F5419708 CRN34331J RESISTOR ARRAY RA11 on Main Board

15399389 RPC10T 471J Y10W MTL, FILM RESISTOR R62 on Main Board

POTENTIOMETER# 01676523 RK09K12A0 10KA X2 POTENTIOMETER VR1 on Main Board

01016167 RK11K1140(10K SP B) 10KX1 POTENTIOMETER VR1 on SW Board

CAPACITOR01128045 ERZVA7V330 CAPACITOR (VARICAP) C201 on Main Board

INDUCTOR, COIL, FILTER12449396 BLM31A601SPT EMI FILTER L3,L4 on Main Board12449452 BLM41A800SPT EMI FILTER L5 on Main Board13529246 DSS310-91D223S EMI FILTER L1,L2 on Main Board

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10 22575241 Sharp key C-20/5015 2247017300 Knob (orange) DAC-15D

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CRYSTAL, RESONATOR00894023 MA-406 20MHZ TE24 CRYSTAL X1 on Main Board01453167 SG-8002DC 67.7376MHZ CRYSTAL XT1 on Main Board

ENCODER01013223 EVQ VEM F01 24B POTENTIOMETER (ROTARY ENCODER) EN1 on SW Board

CONNECTOR# 13369916 5597-14APB CONNECTOR 14P CN2 on Main Board# 01780123 5597-18APB CONNECTOR 18P CN3 on Main Board# F3449702 6216 014 110 808 CONNECTOR 14P CN1 on SW Board# F3439122 6216 018 110 808 CONNECTOR 18P CN4 on SW Board# F3439123 A2001WR2-3P CONNECTOR 3P CN4 on Main Board# F3439121 A2541WR2-2A16NP CONNECTOR 16P CN1 on Main Board

WIRING, CABLE# F3479101 FFC CARD 14P L=80MM BETWEEN MAIN BOARD ASSY AND SW BOARD 2 ASSY# F3479102 FFC CARD 18P L=115MM BETWEEN MAIN BOARD ASSY AND SW BOARD 1 ASSY

G3477140 RIBON CABLE 3P CN2,CN3 on SW Board# G3467132 WIRING 16P L=230MM for LCD# G3467133 WIRING 3P L=330MM CN5 on SW Board

BATTERY12569249S0 CR2032 LITHIUM BATTERY 220MAH/3V

SCREWS40016067 PLAIN WASHER 6X13X1 BZC for VR PEDAL ASSY40011312 SCREW M38 BINDING P-TITE FE BZC for MIDI JACK40011278 SCREW M38 BINDING P-TITE FE ZC for SW BOARD ASSY40019123 SCREW M38 BINDING S-TIGHT BZC for SW PEDAL ASSY

# 40342701 SCREW M2.38 BINDING TAP TIGHT P ZC for LCD40127689 SCREW M310 BINDING TAPTIGHT S TYPE FE BZC for CORD HOOK40012867 SCREW M38 PAN HEAD DOUBLE SEMS FE ZC for MAIN ESCUTCHEON, SW BOARD ASSY40011878 M3 EXTERNAL TOOTH WASHER FECM for MAIN BOARD (near CN2)40016445 NUT (JACK) HAJ-0999-01-190

# 40342690 HEX BOLT M685 HALF THREAD BZC for VR PEDAL ASSY40016456 WASHER (JACK) HSJ-0999-01-21040015901 E-RING M2.5 SUS for VR PEDAL ASSY40016001 LOCK NUT M6 U BZC for VR PEDAL ASSY

# 40342712 SCREW M36 PAN MACHINE W/SW+SMALL PW BZC for BOTTOM COVER40012534 SCREW M36 BINDING S-TITE FE BZC for BOTTOM COVER, ADAPTOR JACK HOLDER, VR PEDAL ASSY40013067 SCREW M38 PAN SEMS FE ZC for MAIN BOARD40123545 NUT M9112 (JACK) FE NI40016467 JACK WASHER M9.2140.5 FE NI

PACKING# G2267109 AC ADAPTOR PAD# G2267108 LOWER PAD# G2607210 PACKING CASE# G2267107 UPPER PAD

MISCELLANEOUS# G2147118 AC JACK HOLDER for JK1(ADAPTOR JACK) on Main Board

G2357108 BASE for BOTTOM COVER12189815 BATTERY HOLDER BH-32 BT1 on Main Board

# G2147119 BOLT HOLDER for VR PEDAL ASSY22360712 CORD HOOK 236-712 for AC ADAPTOR CORD

# G2357110 CUSHION F for VR PEDAL ASSY# G2357111 CUSHION R for VR PEDAL ASSY# G2567104 DISPLAY COVER LCD COVER# G2257203 JACK COVER for JK9(INPUT JACK) on Main Board# G2567103 MAIN ESCUTCHEON for PANEL SW,ENCODER,LCD

G2227301 PEDAL ESCUTCHEON for PEDAL SW ASSYG2357109 PEDAL FOOT for PEDAL SW ASSY

# G2147115 PEDAL HOLDER for VR PEDAL ASSY# G2217705 PEDAL LABEL(1) for PEDAL SW ASSY# G2217706 PEDAL LABEL(2) for PEDAL SW ASSY# G2217707 PEDAL LABEL(3) for PEDAL SW ASSY

# G2217708 PEDAL LABEL(4) for PEDAL SW ASSY# G2217710 PEDAL LABEL(CTL) for PEDAL SW ASSY# G2217709 PEDAL LABEL(DOWN) for PEDAL SW ASSY# G2217711 PEDAL LABEL(UP) for PEDAL SW ASSY# G2147117 PIN STAY for VR PEDAL ASSY# G2147116 SHAFT STAY for VR PEDAL ASSY# H2369401 SPACER 3*6*10 for LED1-LED5(L-34HDSL) on SW Board

G2177103 SUPPORT SPRING for PEDAL SW ASSYG2187602 SWITCH PEDAL for PEDAL SW ASSY

# G2357112 VR PLATE for VR PEDAL ASSY40016523 INSULOK TIE 100M/M T-18R for Main Board ASSY

ACCESSORIES (Standard)00899078 AC ADAPTOR BRC-10000899089 AC ADAPTOR BRC-12000899090 AC ADAPTOR BRC-23000899101 AC ADAPTOR BRC-240A

# G6017276 OWNER'S MANUAL ENGLISH# G6017277 OWNER'S MANUAL JAPANESE# G6017279 QUICK START ENGLISH# G6017278 QUICK START JAPANESE

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Transmitting / receiving data via MIDIThe GT-3 can use exclusive messages to set another GT-3 to thesame settings, or to transmit its settings to a device such as asequencer for storage. The process of transmitting such data iscalled bulk dump, and the process of receiving such data is calledbulk load.

Transmitting data (Bulk dump)The following types of data can be transmitted. When transmittingdata, you can specify the starting and ending points of the data to besent, so only the desired data is transmitted.

Display Data that is transmittedSystem Utility parametersQuick FX Effect setting, pedal setting and control assign

setting data stored in the user.#1-1 to #35-4 The setting contents of patches 1-1 to 35-4Temp The contents of the currently selected patch

< Connections >When saving the data to a sequencerMake connections as shown below, and set the sequencer to acondition ready to receive exclusive messages.

* For details on sequencer operation, refer to the manual for thesequencer you are using.

MIDI OUT

MIDI IN

IDENTIFYING VERSION NUMBER

1. Turn the power off.2. While pressing [MASTER],[PEDAL/ASSIGN], [TUNER/BY

PASS] and [UTILITY] key, turn on power.3. The version number is displayed.

0 0 G T - 3V e r . 1 . 0 1

GT-3GT-3

System

Quick FX

#1-1#35-4 1-135-4

Temp

1.

2. [MASTER][PEDAL/ASSIGN][TUNER/BYPASS]

[UTILITY]

3.

GT-3 Feb. 1999

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When copying the data to another GT-3Make connections as shown below, and set the device ID of bothunits to match.

< Transmission procedure >

1. Select "4.MIDI" with [UTILITY].

2. Use [PARAMETER] to access the following parameter (BulkDump) in the display.

3. Move the cursor to "starting point" with [PARAMETER], thenselect the data to be the starting point with the VALUE dial.

4. Move the cursor to "ending point" with [PARAMETER], thenselect the data to be the ending point with the VALUE dial.

5. Press [WRITE] to transmit the data.

When the transmission has been completed, the previousdisplay will reappear.

6. Press [EXIT] to end the procedure.

MIDI OUT

MIDI IN

starting point ending piont

Receiving data (Bulk load)< Connections >When receiving data saved on a sequencer into the GT-3Make connections as follows. Set the GT-3 to the device ID towhich it was set when transmitting the data.

* For details on sequencer operation, refer to the manual for thedevice you are using.

< Reception procedure >1. Select "4.MIDI" with [UTILITY].

2. Use [PARAMETER] to access the following parameter (BulkLoad) in the display.

3. Transmit data from the transmitting device. When the GT-3receives data, the following display will appear.

When data reception is complete, the following display willappear.

At this time, data may continue to be received.

4. Press [EXIT] to end the procedure.Press [EXIT], and the GT-3 responds with "Checking ..." andchecks the received data. When it finishes checking the data, itwill return to the Play page.

MIDI OUT

MIDI IN

2,3,46 1 5

3

GT-3ID

1. UTILITY4.MIDI

2. PARAMETERBulk Dump

3. PARAMETER

VALUE

4. PARAMETER

VALUE

5. WRITE

6. EXIT

GT-3GT-3

ID

1. UTILITY4.MIDI

2. PARAMETERBulk Load

3. GT-3

4. EXIT

EXITChecking...

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Restoring the factory settings (Initialization)To restore the factory settings of the GT-3, do as follows. You caninitialize all settings, or only a specified section of the patch data inthe user area or utility settings.The following types of data can be initialized.

Display Data that is initializedSystem Utility parametersQuick FX Effect setting, pedal setting and control assign

setting data stored in the user.#1-1 to #35-4 The setting contents of patches 1-1 to 35-4

[Procedure]

1. Turn off the power.

2. While holding [MOD] and [SFX] down, switch on the unit.A display will appear, allowing you to specify the area of datayou wish to initialize.* If you decide not to initialize the settings, press [EXIT].

Initialization will be canceled, and the normal power-ondisplay will appear.

3. Move the cursor to "Starting Point" with [PARAMETER], thenuse the VALUE dial to get the display to show the data that isthe beginning point of the initialization.

4. Move the cursor to "Ending Point" with [PARAMETER], thenget the display to show the ending point of the initialization,also using the VALUE dial.

5. Press [WRITE].The specified area of data will be initialized. The GT-3 will thenbe in its normal power-on state.

3,4 5 3,42

starting point ending piont

Factory settings< TUNER >TUNER Pitch: A=440HzTUNER Out: Bypass

< MANUAL >1: LM (COMP/LM)2: OD (OD/DS)3: DD (DELAY)4: CE (CHORUS) : HR (MOD) : TU (TUNER)

< GLOBAL >Your Setting?: Gt.Amp (Combo)Low EQ: 0dBHigh EQ: 0dBNS Threshold: 0dBReverb Level: 100%

< SYSTEM >LCD Contrast: 16Dial Function: P.NUMBER & VALUESUB CTL1 Func: AssignableSUB CTL2 Func: AssignablePatch Change Mode: Wait for a Num.BANK Extent: 85Assign Hold: On

< MIDI >MIDI RX Channel: 1MIDI Omni Mode: Omni OnMIDI TX Channel: RxMIDI Device ID: 1MIDI PC OUT: OnMIDI EXP OUT: 7MIDI CTL OUT: 80MIDI SUB CTL1OUT: OffMIDI SUB CTL2 OUT: OffMIDI Map Select: Fix

< HARMONIST SCALE >

< AUTO RIFF PHRASE >

GT-3

System

Quick FX

1-135-4 1-135-4

1.

2. SFXMOD

EXIT

3. PARAMETER

VALUE

4. PARAMETER

VALUE

5. WRITE

TUNER Pitch A=440Hz

TUNER Out Bypass

1 LMCOMP/LM

2 ODOD/DS

3 DDDELAY

4 CECHORUS

HRMOD TUTUNER

Your Setting? Gt.AmpCombo

Low EQ 0dB

High EQ 0dB

NS Threshold 0dB

Reverb Level 100%

LCD Contrast 16

Dial Function P.NUMBER & VALUE

SUB CTL1 Func Assignable

SUB CTL2 Func Assignable

Patch Change Mode Wait for a Num.

BANK Extent 85

Assign Hold On

MIDIMIDI RX Channel 1

MIDI Omni Mode Omni On

MIDI TX Channel Rx

MIDI Device ID 1

MIDI PC OUT On

MIDI EXP OUT 7

MIDI CTL OUT 80

MIDI SUB CTL1OUT Off

MIDI SUB CTL2OUT Off

MIDI Map Select Fix

GT-3 Feb. 1999

9

TEST MODE

CAUTION:The user data will be lost during the test mode. Save theuser data on an external memory (e.g. sequencer, MC-50MK2)before entering test mode. For saving procedure, refer to"Transmitting/receiving data via MIDI" in this manual.

Test options1. Display2. LCD Contrast3. Switch4. EXP PEDAL5. Battery6. MIDI IN/OUT7. OUTPUT D/A8. DS A/D/A [GAIN LOW ]9. DS A/D/A [GAIN HIGH]

10. DS A/D/A [OVERDRIVE]11. DS A/D/A [CV CHECK ]12. EXT OD CHECK13. INPUT A/D14. DSP Pitch Interrupt Signal15. Noise (INOUT)16. Noise (EXT)17. Noise (DS)18. Calibrate EXP19. Factory Load

Tools required Expression Pedal(Roland EV-5) MIDI cable Noise meter Oscilloscope Audio generator Blank plug

Entering test mode

(1) Start from the "1. Display" test.

Pressing buttons [MASTER] and [PEDAL/ASSIGN], turn thepower on.

The LCD will show the version of ROM firmware, for approx. 1second.

0 0 G T - 3V e r . 1 . 0 1

During this 1 second, the DSP is tested.When the DSP test is successful, the unit starts the next test.Otherwise, it will show an error message.

(2) Start from the "12.EXT OD CHECK" test.

Pressing buttons [PRE AMP/SP SIM] and [EQ], turn the power on.

Test Description

1. Display

This test first turns on all segments of LCD and LEDs.

2. LCD Contrast

2 . L C D 0 C o n t r a s t0 0 0 0 C o n t r a s t = 1 5

Turn the [VALUE] encoder dial and verify change in LCDcontrast.

1) Turn the [VALUE] encoder dial counterclockwise untilfifteen clicks are felt. The LCD will show below.

2 . L C D 0 C o n t r a s t0 0 0 0 C o n t r a s t = 0

2) Turn the [VALUE] encoder dial clockwise until fifteenclicks are felt. The LCD will show below.

2 . L C D 0 C o n t r a s t0 0 0 0 C o n t r a s t = 1 5

The program proceeds to the next test.

3. Switch

S F X 0 # - - - - - - - - -0 0 0 0 - - - - - - - - - -

Shown on the left of the LCD are the name of buttons and onthe right are the location of these buttons.Initially these button locations are preceded by the symbol "-".When this symbol changes to "*", press the correspondingbutton and the symbol "#" is replaced by "*".Wrong selection calls the error message.

[MASTER][PEDAL/ASSIGN]

PRE AMP/SP SIMEQ

GT-3 Feb. 1999

10

Normally, the buttons should be pressed in the order givenbelow:(1) Effect selector buttons

From left to right and upper to lower.(2) Pedal switches

[BANK DOWN][BANK UP]

[1][2][3][4][CTL]

When pressing a button associated with an LED:(1) Make sure that the LED is lighting, and(2) It is turned off as the button is pressed.

When pressing the pedal switch [1], the program proceeds tothe next test.

4. EXP PEDAL

4 . E X P 0 P E D A L[ - - - ] [ - - - ] [ - - - ]

Insert EV-5 into [SUB EXP PEDAL/SUB CTL 1,2]. Setminimum volume of EV-5 zero.Test order is the pedal on the unit and [SUB EXP PEDAL/SUB CTL 1,2].

1) Depress the pedal to the center of its travel.The center of the LCD will show "***".

4 . E X P 0 P E D A L 4 . S U B 0 E X P 0 P E D A L[ - - - ] [ * * * ] [ - - - ] o r [ - - - ] [ * * * ] [ - - - ]

2) Depress the pedal further to the bottom.The right of the LCD will show "***".

4 . E X P 0 P E D A L 4 . S U B 0 E X P 0 P E D A L[ - - - ] [ * * * ] [ * * * ] o r [ - - - ] [ * * * ] [ * * * ]

3) Fully release the pedal. The left of the LCD will show"***".

4 . E X P 0 P E D A L 4 . S U B 0 E X P 0 P E D A L[ * * * ] [ * * * ] [ * * * ] o r [ * * * ] [ * * * ] [ * * * ]


5. Battery

5 . B a t t e r y0 0 0 0 3 . 2 V

The LCD will show the voltage of the battery used to back upthe memory.

Press the button [EXIT] to proceed to the next test.

6. MIDI IN/OUT

6 . M I D I 0 I N / O U T0 N o 0 C o n n e c t

Hook up [MIDI IN] socket to [MIDI OUT] socket throughthe MIDI cable.The display "No Connect" will be replaced by "Verify OK!",if the MIDI circuit is normal.The program automatically proceeds to the next test.

6 . M I D I 0 I N / O U T0 V e r i f y 0 O K 0 !

7. OUTPUT D/A

7 . O U T P U T 0 D / A0 M u t e 0 O f f / - -

A) Verify the rectangular waveform on the scope.B) The signal is automatically and periodically muted.

Check the complete muting function.C) Turn OUTPUT control clockwise and counterclockwise

and verify corresponding level changes.

7 . O U T P U T D / A M u t e - - - / O n

Oscilloscope:0.5V/DIV,0.5mS/DIV

[BANK DOWN][BANK UP]

[1][2][3][4][CTL]

SUB EXP PEDAL/

SUB CTL 1,2

SUB EXP PEDAL/SUB CTL 1,2

EXIT

MIDI INMIDI OUT

GT-3 Feb. 1999

11

Mute=Off Mute=Onfig .1


8. DS A/D/A [GAIN LOW]

8 . D S 0 A / D / A : L O W0 [ G A I N 0 L O W ]

Internally generated analog test signal is converted intodigital and reconverted back to analog signal in the DS circuitbefore being output to OUTPUT sockets.

NOTE: For the following measurements, first connect theoscilloscope to OUTPUT R. Repeat the measurement byconnecting the scope to OUTPUT L(MONO) with the blankplug inserted in OUTPUT R.

OUTPUT level control:MAXOscilloscope:0.5V/DIV, 0.5mS/DIV

fig 2


9. DS A/D/A[GAIN HIGH]

9 . D S 0 A / D / A : H I G H0 [ G A I N H I G H ]

Follow the steps described in the test 8.Note that the circuit gain is set to high during this test.


OUTPUT level control:MAXOscilloscope:0.5V/DIV,0.5mS/DIV

fig. 3


10.DS A/D/A[OVERDRIVE]

1 0 . D S 0 A / D / A : O D0 0 [ O V E R D R I V E ]

Follow the steps described in the test 8.Note that this time the circuit being tested is OD but not DSP.


EXIT

L(MONO)R

OUTPUTL(MONO)

L,R

L(MONO)R

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

GT-3 Feb. 1999

12


fig. 4


11.DS A/D/A[CV CHECK ]

1 0 . D S A / D / A : C V0 0 [ C V C H E C K ] 0 0

The CV level sweeps from 0 to 100. Verify smooth waveformlevel change.

NOTE: This test cannot be interrupted until one CV sweepcycle completes. (0-100-0)



CV CHECK=0 CV CHECK=100

fig. 5Press the button [EXIT] to proceed to the next test.

12. EXT OD CHECK

1 2 . E X T 0 O D 0 C H E C K0 0 [ D S P E X T O U T ]

Check the signal path:

A) Connect the oscilloscope to either OUTPUT socket andverify rectangular output waveform.

ESP D/A SEND(Signal source)

ESP A/D RETURN

D/A OUTPUT(Rectangular waveform)

B) Insert the blank plug into RETURN socket and verifydiscontinued signal path.

ESP D/A SEND(Signal source)

---x-- (Cut off)

ESP A/D RETURN

D/A OUTPUT(Rectangular)


OUTPUT level control:MAXOscilloscope:0.5V/DIV, 0.5mS/DIV

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

/)

/)

/)

/)

/)

GT-3 Feb. 1999

13

fig. 6


13.INPUT A/D

1 3 . I N P U T A / D0 0 [ I N - - - - - O U T ]

Feed a rectangular waveform to the unit and verify thecorresponding output.


INPUT:Rectangular Waveform, 400Hz, 40mVp-pOUTPUT level control:MAXOscilloscope:0.5V/DIV,0.5mS/DIV

fig. 7


14.DSP pitch interrupt signal

1 4 . D S P 0 I N T 0 ( 6 7 p )

Interrupt signal generated at DSP is checked.If the test fails, the program displays the error message andwon't proceed to the next test.

15.Noise (INOUT)

1 5 . N o i s e ( I N O U T )0 0 [ I N - - - - - O U T ]


OUTPUT level control:MAX

Measure the residual noise levels which must be less than -82dBm (IHF-A).

ESP A/D INPUT

D/A OUTPUT(Connect noise meter)


16.Noise(EXT)

1 6 . N o i s e ( E X T )0 0 [ R E T U R N - O U T ]




Inser t a b lankp l u g i n t o t h eRETURN socket.

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

, 400Hz, 40mVp-p

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

/)

GT-3 Feb. 1999

14

ESP A/D INPUT

D/A SEND

ESP A/D RETURN



17.Noise(DS)

1 7 . N o i s e ( D S )0 0 [ D S - - - - - O U T ]




ESP A/D INPUT

D/A

DS Circuit

ESP A/D



18.Calibrate EXP

1 8 . C a l i b r a t e 0 E X P

This step set the margin at the lowest level and the margin atthe highest level.1) Set the pedal at fully released (up) position. Keep your

hand away from the pedal.2) Press [WRITE] button and the margin at the lowest level

is set.3) Set the pedal to the bottom. Keep your hand off from the

pedal.4) Press [WRITE] button and the margin at the highest level

is set.


19.Factory Load

1 9 . F a c t o r y 0 L o a d

Press [WRITE] button two times to load the factory presetdata.

EXIT

L(MONO)R

OUTPUT L(MONO)

L,R

L(MONO)

R

EXIT

WRITE

WRITE

WRITE

/)

/)

GT-3 Feb. 1999

15


CN3

IC14CODECAK4522

IC8 DSP

IC9DRAM 4M

IC7SRAM 1M

IC2 or IC3ROM 4M

LCD UNIT

SW 2 BOARD ASSYPEDAL SW,LED

IC12CODECAK4522

OUTPUT L

OUTPUT R

RETURN

SEND

PHONES

MIDI OUT IN

OUTPUTVOLUME

IC1 CPUH8/3006

SUB EXP PEDALSUB CTL 1,2

INPUT

AnalogDistortion

JK4

JK5

IC21a

IC21bQ11 IC13a

IC13b

IC19aIC20a

IC20b IC19bVR1a

VR1b

IC15a

IC15bIC18b

JK8

JK7

JK6

JK9

JK3

EXT OD/DS

EXT OD/DS

JK2

CN2

CN1

CN1

SW 1 BOARD ASSYPANEL SW,LEDENCODER

CN4

EXP BOARD ASSYPEDAL VR

CN5CN4

MAIN BOARD ASSY

BLOCK DIAGRAM/

GT-3 Feb. 1999

16


CIRCUIT DIAGRAM (SW BOARD)

READ6

71235089SW BOARD3 ASSY

BANK DOWN BANK UP

READ4

PEDAL 4

READ3

PEDAL CTLPEDAL 3PEDAL 2

READ1

PEDAL 1

READ0SCAN3

CKS

CKL

+5V

A

SQH

SCAN3

GND

READ0

READ1

READ3

READ4

READ5

TO

CN2

ON

MAIN

BOARD

READ2READ6

READ2

SW BOARD2 ASSY71235089

READ5

TO CN4 ON MAIN BOARD

EXP BOARD ASSY71235089

(10K SP B)

WRITEEZ EDITMASTER

"4"

DELAYPARAM[]

REVERB

PEDAL UTILITY

MANUAL

TUNER

READ5

READ6

READ3

READ4

READ2

READ0

READ1

SCAN0

SCAN2

SCAN1

SCAN0

READ0

READ1

READ2

READ3

READ4

READ5

READ6

SQH+5V

GND

ENC B

ENC A

GND

CKSCKL

SFX COMP WAH OD/DS EQPREAMP

UTILITYTUNERMANUALMASTER PEDAL EZREVCHOMOD DELAY

1 2D7

1SS133

1 2SW6

SKQKAH1 2

D6

1SS133

1 2SW7

SKQKAH

1 2D5

1SS133

1 12 23 3

CN31 12 23 3

CN2

RIBON CABLE 3P

1 2D4

1SS133

1 2SW4

SKQKAH 1 2

SW5

SKQKAH 1 2

SW2

SKQKAH1 2

D2

1SS133

1 2D3

1SS133

1 2SW3

SKQKAH1 2

D1

1SS133

1 2SW1

SKQKAH

1 12 23 34 45 56 67 78 89 9

10 1011 1112 1213 1314 14

CN16216 014 110 808

2A2B2C2D2E

A 14

OE 13

CKL 12R 10

CKS 11

VCC

16

GND8

SQH 9QH 7QG 6QF 5QE 4QD 3QC 2QB 1QA 15

IC1M66312P

R11k

2E

1

2

LED1L-34HDSL

2C

R21k

R31k

2D

1

2

LED2L-34HDSL

1

2

LED3L-34HDSL

R41k

R51k

2A

2B

1

2

LED4L-34HDSL

1

2

LED5L-34HDSL

1

2

3

4

VR1

RK11K1140

112233

CN5WIRING 3P

1 2D24

1SS133

1 2D17

1SS133

1 2SW24

SKQKAB 1 2

SW17

SKQKAB1 2

D19

1SS133

1 2D22

1SS133

1 2SW22

SKQKAB1 2

D15

1SS133

1 2SW15

SKQKAB 1 2

SW19

SKQKAB1 2

D8

1SS133

1 2D11

1SS133

1 2SW11

SKQKAB 1 2

SW8

SKQKAB1 2 3 4

EN1EVQ VEM F01 24B

1 1CN6

WIRING SW 1 2

SW9

SKQKAB

1 2SW10

SKQKAB

1 2D9

1SS133

1 2D10

1SS133

1 2D12

1SS133

1 2D13

1SS133

1 2SW12

SKQKAB

1 2SW13

SKQKAB

1 2D16

1SS133

1 2D14

1SS133

1 2SW20

SKQKAB 1 2

SW16

SKQKAB

1 2SW14

SKQKAB 1 2

SW18

SKQKAB1 2

D18

1SS133

1 2D20

1SS133

1 2D21

1SS133

1 2D23

1SS133

1 2SW23

SKQKAB

1 2SW21

SKQKAB

1 2D27

1SS133

1 2D26

1SS133

1 2D25

1SS133

1 2SW27

SKQKAB 1 2

SW26

SKQKAB

1 2SW25

SKQKAB

1H

1F

R121k

R131k

1L

1J

R101k

R111k

1P

1N

R81k

R91k

1A1B1C1D

QA 1QB 2

VCC

3

A 4

OE 5

CKL 6

R 7

CKS 8

GND9

SQP 10QO 11QP 12QN 13QM 14QL 15QK 16QJ 17QI 18QH 19QG 20QF 21QE 22QD 23QC 24

IC2M66310P

1 12 23 34 45 56 67 78 89 9

10 1011 1112 1213 1314 1415 1516 1617 1718 18

CN4

6216 018 110 808

1E1F1G1H1I1J1K1L1M1N1O1P

1O

1M

1

2

LED8L-312LRD

1

2

LED9L-312LRD

1I

1K

1

2

LED10L-312LRD

1

2

LED11L-312LRD

1D

1E

1G

1

2

LED12L-312LRD

1

2

LED13L-312LRD

1B

1C

1A

R271k

1

2

LED27L-312LRD

R251k

R261k

1

2

LED25L-312LRD

1

2

LED26L-312LRD

R231k

R241k

1

2

LED23L-312LRD

1

2

LED24L-312LRD

R201k

R211k

R221k

1

2

LED20L-312LRD

1

2

LED21L-312LRD

1

2

LED22L-312LRD

R181k

R191k

1

2

LED18L-312LRD

1

2

LED19L-312LRD

/ (SW BOARD)

GT-3 Feb. 1999

17


CIRCUIT DIAGRAM (1/2) (MAIN)GAIN SWOD SWDS SWGAIN CV

PWM

MUTE

OUT INMIDI

(67.7376MHZ)

(4M,16BIT)

ADA_PD

EXP/CTL1,2

TO

CN5

ON

EXP

BOARD ENCORDER

RST

SW SCAN

LED DRIVE

SW READ0SW SCAN3

SW READ5

SW READ4SW READ3

SW READ1

LED CKS

LED A

SQH+5VGND

LED CKL

SW

BOARD

2

TO

CN1

ON

SW SCAN1

ENC AENC B

SW SCAN2SW SCAN0

SW READ6

SW READ5

SW READ4

SW READ3

SW READ2

SW READ1

SW READ0

LED CKS

SW READ6SW READ2

GND

+5V

GND

SQHLED CKL

To

CN4

ON

SW

BOARD

1

SW READ

for EMI

LCD CONTRAST

TO LCD UNIT

1

2

3Q12RN1307

R8110k

R7810k

1

2

3Q13RN1307

R8210k

R7910k

1

3

2Q14RN2307

R8010k

C940.1

C950.1

8

4

IC22CM5218AFP

C27210/16 6

57

IC22BM5218AFP 1

2

3Q15RN1307

2

31

IC22AM5218AFP

R87100k

R862.2k

C960.01

R8810k

R8410k

R8510k

R901M

R89

100

C273

47/16 1

3

2

Q162SA1586GR

D71SS352

R7110k

MUTE

DS_SWOD_SWGAIN_SW

C900.1

R72 120

C870.1

5 6

IC24C74HC04

9 8

IC24D74HC04

11 10

IC24E74HC04

13 12

IC24F74HC04

14

7

IC24G74HC04

A 1

K 3 GND 4VO 5

VCC 6IC23

PC-410KT

6 4 5 3 2 1

JK2YKF51-5054

C910.1

L3 BLM31B601

L4 BLM31B601

D101SS352R73 100

R70 220

R68 220

R6647k

R67

3.3k

R6910k

3 4

IC24B74HC04

1 2

IC24A74HC04

1

3

2Q172SA1586GR M_MUTE

M_OUT

M_IN

C7515p

C7615p

X1MA-406(20MHz)

C590.1

CS_DSP

3 4 5

6

IC6B74HC10AFN

9 10 11

8

IC6C74HC10AFN

14

7

IC6D74HC10AFN

13 12

IC5F74HC04AFN

11 10

IC5E74HC04AFN C58

0.1

1 2 13

12

IC6A74HC10AFN

1 2

IC5A74HC04AFN

3 4

IC5B74HC04AFN

5 6

IC5C74HC04AFN

9 8

IC5D74HC04AFN

14

7

IC5G74HC04AFN

C430.1

R54

150

R8310k

C21210/16OUT

3

OE 1

VCC 4

GND 2

XT1SG-8002DC

L5BLM41A800

DS_SWGAIN_SW

GAIN_CVOD_SW

MUTEADA_PD

C410.1

C21310/16

C420.1A8 26

A7 25A6 24A5 23A4 22A3 19A2 18A1 17A0 16

NC 11NC 12NC 15NC 30

RAS 14UCAS 28LCAS 29WE 13OE 27

I/O15 39I/O14 38I/O13 37I/O12 36I/O11 34I/O10 33

I/O9 32I/O8 31I/O7 10I/O6 9I/O5 8I/O4 7I/O3 5I/O2 4I/O1 3I/O0 2

VCC 1VCC 6VCC 20

VSS 21VSS 35VSS 40

IC9

V53C16256HK50

EA8EA7EA6

CD7CD6CD5CD4CD3CD2CD1CD0

64

65

29

53

74 75 76 77 78 79 81 82 83 84 85 86 87 88

92 93 94 95 96 97 98 99

68 70 69

66 67

51

130131

125128

120121

111112113114115116

62 61 60 59 58 57

133

101102103104105106107

132

13613713813914014114227262524232221201716

15

1413

4948474645444342393837363534333210 9 8 7 6 5 4 3

12

18

30

41

54

72

90

108

109

211

19

28

31

40

50

55

63

71

73

80

89

91

100

124

52

117

122

56

118

123

129

110

119

126

1134

127

135

143

144

IC8TC170C140AF-003 (ESP2)

CA13CA12CA11CA10CA9CA8CA7CA6CA5CA4CA3CA2CA1CA0

CA16CA15CA14CA13CA12CA11CA10CA9CA8CA7CA6CA5CA4CA3CA2CA1CA0

CA17CA18CA19

CS_RAM

DINT1

DINT0

DS_SWOD_SWGAIN_SW

BATTERYEXP_PEDAL

L_CONT

XB

XA

RD6

RD2

XATAL

69

EXTAL

68

VCC70

VCC37

VCC

3

VSS94

VSS67

VSS59

VSS46

VSS24

VSS13

AVCC78

VREF

79

AVSS88

A19 58A18 57A17 56A16 55A15 54A14 53A13 52A12 51A11 50A10 49

A9 48A8 47A7 45A6 44A5 43A4 42A3 41A2 40A1 39A0 38

D15 36D14 35D13 34D12 33D11 32D10 31

D9 30D8 29

LWR 74HWR 73

RD 72

AS 71

RES 65

RESO 12

STBY 64

NMI 66

MD2 77MD1 76MD0 75

P67/PHAI 63P62/BACK 62P61/BREQ 61P60/WAIT 60

P77/AN7/DA1 87P76/AN6/DA0 86P75/AN5 85P74/AN4 84P73/AN3 83P72/AN2 82P71/AN1 81P70/AN0 80

P84/CS0 93P83/IRQ3/CS1/AD 92P82/IRQ2/CS2 91P81/CS3/IRQ1 90P80/IRQ0/RFSH 89

PA7/TP7/TIOCB2/ 2PA6/TP6/TIOCA2/ 1PA5/TP5/TIOCB1/100PA4/TP4/TIOCA1/ 99PA3/TP3/TIOCB0/ 98PA2/TP2/TIOCA0/ 97PA1/TP1/TCLKB/T 96PA0/TP0/TCLKA/T 95

PB7/TP15/RXD2 11PB6/TP14/TXD2 10PB5/TP13/LCAS/S 9PB4/TP12/UCAS 8PB3/TP11/TMIO3/ 7PB2/TP10/TMO2/C 6PB1/TP9/TMIO1/D 5PB0/TP8/TMO0/CS 4

P95/SCK1/IRQ5 19P94/SCK0/IRQ4 18P93/RXD1 17P92/RXD0 16P91/TXD1 15P90/TXD0 14

P47/D7 28P46/D6 27P45/D5 26P44/D4 25P43/D3 23P42/D2 22P41/D1 21P40/D0 20

IC1HD6413006FP

JACK_CTL2JACK EXP1/CTL1

R7610k C93

0.1

3

1

D8A1SS302

2

3

D8B1SS302

R7410k

R774.7k

R75470k

3

1

D9A1SS302

2

3

D9B1SS302

C920.001

JK3HTJ-064-12D

C440.1

R551k

1 12 23 3

CN4

CN3P

R582.2k

R562.2k

C630.033

R57

47k

R59

47k C640.033

XB

XA

LCD7LCD6LCD5LCD4LCD3LCD2LCD1LCD0

GAIN_CV

MUTEL_EL_R/WL_RS

RD5RD4RD3

RD1RD0

M_OUTA

CKSM_MUTEM_IN

CKL


RD

WR

CA16CA15CA14CA13CA12CA11CA10CA9CA8CA7CA6CA5CA4CA3CA2CA1CA0

CA17CA18

C770.1

A17 3A16 34A15 35A14 36A13 37A12 38A11 39A10 40A9 41A8 42A7 4A6 5A5 6A4 7A3 8A2 9A1 10A0 11DQ15/A-1 31

NC 2

CE 12WE 43OE 14BYTE 33

DQ14 29DQ13 27DQ12 25DQ11 22DQ10 20

DQ9 18DQ8 16DQ7 30DQ6 28DQ5 26DQ4 24DQ3 21DQ2 19DQ1 17DQ0 15

RP 44

VPP 1VCC 23

VSS 13VSS 32

IC2

LH28F400BVN-BL85 (ZL70100-ZL82199)(ZL93200-ZL93399)

RDWR

DINT1DINT0

CS_DSP


C880.1

R49 180

R51 100

R50 100

EA5EA4EA3EA2EA1EA0

ERASECASEWE

ED5ED4

ED9ED8ED7ED6

ED10ED11

ED7ED6ED5ED4

ED8ED9ED10ED11

CD7CD6CD5CD4CD3CD2CD1CD0 R52

100

R53100

C80

0.1


CA17CA18

CA19

A18 31A17 30A16 2A15 3A14 29A13 28A12 4A11 25A10 23A9 26A8 27A7 5A6 6A5 7A4 8A3 9A2 10A1 11A0 12

CE 22OE 24

D7 21D6 20D5 19D4 18D3 17D2 15D1 14D0 13

NC 1VCC 32

VSS 16IC3MX23C4000PC-10 (ZL92200-Z93199)

(ZL93400- )

C78

0.1

C79

0.1

SC3SC2SC1SC0

C74

0.1

ACKS

SC3SC2

4321

5 6 7 8

RA11CRN34331J

CKL4321

5 6 7 8

RA9CRN34101J

4 3 2 1

5 6 7 8

RA10CRN34104J

C730.1

1 12 23 34 45 56 67 78 89 9

10 1011 1112 1213 1314 14

CN25597-14APB

C20910/16

1 12 23 34 45 56 67 78 89 9

10 1011 1112 1213 1314 1415 1516 1617 1718 18

CN3

5597-18APB

C700.1

C710.1

4 3 2 1

5 6 7 8

RA7CRN34103J

4 3 2 1

5 6 7 8

RA5CRN34103J

4321

5 6 7 8

RA6CRN34102J

4321

5 6 7 8

RA8CRN34102J

C720.1

SC1SC0

RD6RD5RD4

RD3RD2RD1

C27410/16

CA2CA1CA0


CA15

CA19

CA16 A16 2A15 31A14 3A13 28A12 4A11 25A10 23A9 26A8 27A7 5A6 6A5 7A4 8A3 9A2 10A1 11A0 12

CS1 22

R/W 29

OE 24 D0 13D1 14D2 15D3 17D4 18D5 19D6 20D7 21

CS2 30

NC 1

VDD 32

GND 16

IC7

TC551001CF-70L

C570.1

C610.1

C480.1

C550.1

C460.1

C450.1

BTV

C560.1

C540.1

C530.1

C470.1

C500.1

C510.1

C520.1

C49

0.1

C12

0.1

MCKLRCK

BCKAD1AD0

DA0DA1

256fsfs64fs


RST

C27110/16

R6310k

R651M 3

1D11A1SS301

3 2

D11B1SS301

R64

10k

CA0

WR

RD

CS_RAM

C86

0.1

3

1 4

5

2

IC25TC75S51F

D11SS352

OUT 6

NC 8GND 4

VCC 7NC 1NC 2NC 3CD 5

IC4

M51953AFP

C60

0.1

C2112.2/50

L_CONT

RD0

4 3 2 1

5 6 7 8

RA4CRN34104J

C670.1

C680.1

C660.1

C690.1

R61

1k

C820.1

1

2

3Q12SC4116GR

R62470

R60470

C810.1

C650.1

C21010/16

C620.1

C20810/16

4321

5 6 7 8

RA1CRN34101J

4321

5 6 7 8

RA2CRN34101J

4321

5 6 7 8

RA3CRN34101J

C830.1

1 12 23 34 45 56 67 78 89 9

10 1011 1112 1213 1314 1415 1516 16

CN1A2541WR2-2A16NP

LCD0LCD1LCD2LCD3

LCD4LCD5LCD6LCD7

L_RSL_R/WL_E

BT1BH-32

MIDI and Flash

DSP and SRAM

/ (1/2) (MAIN)

GT-3 Feb. 1999

18


CIRCUIT DIAGRAM (2/2) (MAIN)PHONE

INPUT

OUTPUT L

OUTPUT R

RETURN

SEND

Power SW

JK6HSJ0857-01-1210

C10610p

R11847k

C1040.001

R20247/2W

R20347/2W

1

2

3

Q92SC4213A

1

2

3

Q82SC4213A

R105

1k

R106

1k

C11210p

C1140.1

C1130.1

6

57

IC19BM5218AFP

C1070.1

C259470/16

C260470/16

8

4

IC20CM5216AFP

C25547/16

R11710k

R12610k

R12556k

C1090.1

C190.1

C200.1

8

4

IC19CM5218AFP

C25310/16

C224100/16

C223100/16

C130.1

C180.1

R29470

R3110

VREFH 1

AINR+ 2

AINR- 3

AINL+ 4

AINL- 5

VA 6

AGND 7

DIF0 8DIF1 9

LRCK 10SCLK 11

SDTI 12SDTO 13

SMUTE 14

DEM0 15DEM1 16

MCLK 17

VD 18

DGND 19

PD 20

CMODE 21

AOUTL 22

AOUTR 23

VCOM 24IC14

AK4522AF

C229100/16

C225100/16C23

10p

6

57

IC15BNJM2100M

R23100k

R2618k

C24910/16

6

57

IC18BM5238FP

R13110k

C1190.01

R1301.2k R12918k

C118Not In Use

R133

10k

2

3

D12B1SS302

C275

0.047

C250100/16

C251100/16

JK9HTJ-064-12I

3

1

D12A1SS302

C1170.1

C1160.1

R1321M

8

4

IC18CM5238FP

2

31

IC18AM5238FP

C2510p

2

31

IC15ANJM2100M

R2818k

R256.8k

C260.1

R274.7k

R244.7k

R30470

C150.0022

C140.1

C22647/10

C2284.7/50

C25210/16

R33100

C11510p

R12710k

2

31

IC19AM5218AFP

C25610/16

C25710/16

C25447/16

32

1

VR1ARK09K12A0

65

1

VR1BRK09K12A0

R12310k

R11947k

R12856k

R12447k

C105150p

R120100

C11010p

2

31

IC20AM5216FP

6

57

IC20BM5216FP

C26510/16

R1081k

R12247k

C1110.001

R107

4.7k

1

2

3

Q72SC4213A

R10910k

C258100/16

R1131k JK7

HTJ-064-12I

R114100k

R1151k

MCKBCK

LRCK

AD0DA0

JK8HTJ-064-12I

R116100k

R4847k

ADA_PD

R121100

C26410/16C263

100/16

R1111k

R110

4.7kR11210k

1

2

3

Q62SC4213A

C108150p

8

4

IC15CNJM2100M

C240.1

C170.0022

C160.1

C2274.7/50

C261

10/16

R92220k

C9910p

6

57

IC21BM5218AFP

C27010/16

R9310k

R10110k

R9947k

3

1

2

Q112SK880GR

C980.001

R100120k

R91

10k

JK4HTJ-064-12I C97

0.1

C40.1

8

4

IC16CM5218AFP

D21SS352

D31SS352

R192.2k

R12

22k

C243

10/16

1

2

3

Q52SC3324GR

3

1 2

Q22SK880GR

C60.1

C50.1

R172.2M

R1410k

R1668k

IN1 2IN2 6

CV 5

COM 3

OUT1 1OUT2 7

VCC 8

GND 4

IC17

M5222FPR15270

R4233k

R3810

C222100/16

C340.1

C270.1 C330.1

C320.1

VREFH 1

AINR+ 2

AINR- 3

AINL+ 4

AINL- 5

VA 6

AGND 7

DIF0 8DIF1 9

LRCK 10SCLK 11

SDTI 12SDTO 13

SMUTE 14

DEM0 15DEM1 16

MCLK 17

VD 18

DGND 19

PD 20

CMODE 21

AOUTL 22

AOUTR 23

VCOM 24IC12

AK4522AF

C218100/16

C217100/16

C216100/16

C1000.1

8

4

IC21CM5218AFP

C1010.1

C267100/16

C266100/16

MUTE

GAIN_SW

GAIN_CVOD_SW

DS_SW

AD1DA1

JK5HTJ-064-12I

R941k

R95100k

R96100k

R97

1kR98

4.7k

1

2

3

Q102SC4213AC269

10/16

C10210p

2

31

IC21AM5218AFP

C262

10/16

C268

10/16

R10347k

R10410k

C1030.001

R102

22k

R36470

C290.0022

C280.1

C21947/10

C400.1

R434.7k

R464.7k

C3710p

6

57

IC13BNJM2100M

R4547k

R4422k

C2214.7/50

R2110k

R204.7k

C245

10/16

C246

10/16

C2481000/10

R18

27k

2

3D6B1SS302

3

1

D6A1SS302

6

57

IC16BM5218AFP

R1147k

R1347k

C2

47p

C247

10/16

C24410/16

3 1D4A

1SS302

2 3D4B

1SS302

C30.022

R1010k

R6

10k

D51SS352

R81k

2

31

IC16AM5218AFP

C24210/16

3

12

Q32SK880GR

C1220p

R918k

R7

1k

C240

0.1

R5100k

JK1HEC0740-010010

C201ERZVA7V330

C2410.01

3

2

1

L2DSS310-91D223SSW1

SDKLA1-B

C2022200/25

D101

1N4004

C840.1

C850.1

1

2

3Q42SC4213A

R2247k

IN 6

S.S 2GND3

OUT 1

LIN 4

IC26SI-8501L

C203470/10

C3910p

C380.1

8

4

IC13CNJM2100M

2

31

IC13ANJM2100M

R47100k

C2204.7/50

R37470

C310.0022

C300.1

R3968

C11

0.1

C90.1

C100.1

IN 1 OUT 3GND2

IC10TA78L05S

C214100/16

C215100/16C7

0.1C80.1C231

100/25

C230100/25

3

1 2

Q1012SC2120Y

IN 1 OUT 3GND2

IC11TA78L05SD102

1N4004

R201

10/2W

C2042200/25

R322.2k

C205470/25

3

2

1

L1DSS310-91D223S

R14.7k

R24.7k

D104

1N4004

C207470/25

C206470/25

D103

1N4004

C233100/25

C234100/25

3

1 2

Q1022SC2120Y

3

21

Q1032SA1015GR

C235100/25

C232100/25

3

21

Q322SB1375

3

1 2

Q332SD2012

R41k

C236100/16

C238100/16

R31.5k

1

2D105RD10ESAB2

1

2D106RD10ESAB2

C237100/16

C239100/16

Poly

(10kAx2)OUTPUT

(10kAx2)OUTPUT

Ceramic

Poly

/ (2/2) (MAIN)

GT-3 Feb. 1999

19


CIRCUIT BOARD (MAIN)

Apparatus containing Lithium batteries

ADVARSEL!Lithiumbatteri - Eksplosionsfare ved fejlagtig hndtering.Udskiftning m kun ske med batteri afsamme fabrikat og type.Levr det brugte batteri tilbage til leverandren.

ADVARSEL!Lithiumbatteri - Eksplosjonsfare.Ved utskifting benyttes kun batteri somanbefalt av apparatfabrikanten.Brukt batteri returneres apparatleverandren.

CAUTIONDanger of explosion if battery is incorrectly replaced.Replace only with the same or equivalent type recommended by manufacturer.Discard used batteries according to the manufacturer's instructions.

VARNING!Explosionsfara vid felaktigt batteribyte.Anvnd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren.Kassera anvnt batteri enligt fabrikantens instruktion.

VAROITUS!Paristo voi rjht, jos se onvirheellisesti asennettu.Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hvit kytetty paristo valmistajan ohjeiden mukaisesti.

For Nordic Countries

View from component side. View from foil side.

/ (MAIN)

GT-3 Feb. 1999

20


CIRCUIT BOARD (SW BOARD) / (SW BOARD)

GT-3 Feb. 1999

21

ERROR MESSAGE

DSP Check

P R A M : N G 0 I R A M : - -D R A M : - - 0 G R A M : - -

Symptom: RRAM of DSP(IC8) returns data which is different fromthat written to it.

P R A M : - - 0 I R A M : N GD R A M : - - 0 G R A M : - -

Symptom:IRAM of DSP(IC8) returns data which is different fromthat written to it.

P R A M : - - 0 I R A M : - -D R A M : - - 0 G R A M : N G

Symptom:GRAM of DSP(IC8) returns data which is different fromthat written to it.

* Check the following parts and assosiated wirings.

CPU(IC12) :pins 38-45, 47-58, 29-36DSP(IC8) :pins 68-70, 74-79, 81-88, 92-99ROM(IC2) (ZL70100-ZL82199) :pins 3-12, 15, 17, 19, 21, 24, 26, 28, 30, 31, 34-42

(ZL93200-ZL93399)ROM(IC3) (ZL92200-ZL93199) :pins 2-15, 17-23, 25-31

(ZL93400up)SRAM(IC7) :pins 2-15, 17-21, 23, 25-28, 31

P R A M : - - 0 I R A M : - -D R A M : N G 0 G R A M : - -

Symptom:DRAM(IC9) returns data which is different from thatwritten to it through DSP(IC8).

CPU(IC12) :pins 38-45, 47-58, 29-36DSP(IC8) :pins 68-70, 74-79, 81-88, 92-99ROM(IC2) (ZL70100-ZL82199) :pins 3-12, 15, 17, 19, 21, 24, 26, 28, 30, 31, 34-42

(ZL93200-ZL93399)ROM(IC3) (ZL92200-ZL93199) :pins 2-15, 17-23, 25-31

(ZL93400up)SRAM(IC7) :pins 2-15, 17-21, 23, 25-28, 31DRAM(IC9) :pins 2-10, 16-19, 22-26

Battery Check

4 . B a t t e r y0 0 0 0 1 . 0 V 0 0 0 L o w

If the battery voltage for memory back-up is "2.7V" or less, thedisplay shows "Low".

4 . B a t t e r yN o 0 B a t t e r y 0 ! !

If no battery connected, the display shows "No Battery !!".

* Replace with a new lithium battery of the same type. If the errorcondition still exists, check the following parts and associatdwirings.

CPU(IC1):pin 80OP.Amp(IC25):pins 1-5Resistor(R63, R64, R65)Diode(D11)Capacitor(C86)

MIDI Check

5 . M I D I 0 I N / O U TN o 0 C o n n e c t

Symptom:No connect MIDI IN jack to MIDI OUT jack via theMIDI cable.

5 . M I D I 0 I N / O U TV e r i f y 0 E R R O R

Symptom:Transmitted data (MIDI OUT) and received data (MIDIIN) don't agree with eack other.


MIDI INCPU(IC1):pin 16Resister(R71,R72,R73)Capacitor(C90)Photo Coupler(IC23)Diode(D10)

MIDI OUTCPU(IC1):pins 14, 28Resister(R66,R67,R68,R69,R70)Gate IC(IC24):pins 1-4Transistor(Q17)Inductor(L3,L4)

(MIDI OUT)(MIDI

IN)

GT-3 Feb. 1999

22

DSP pitch interrupt signal check

1 6 . D S P I N T 0 ( 6 7 p )0 0 0 - - - E R R O R ! - - -

Symptom:Interrupt signal generated at DSP(IC8) is not recognized.


CPU(IC1):pin 2DSP(IC8):pin 67

CHANGE INFORMATION

Rom Version UP

Effective

ZL70100-ZL82199 IC2(FLASH MEMORY) Ver 1.00ZL93200-ZL93399ZL92200-ZL93199 IC3(MASK ROM) Ver 1.01ZL93400 up

Ver 1.01The following improvements are incorporated. To reduce noises when switching a patch number. To change the parameter of the factory presets.

Service response When you meet a cram, add the following modification.

Remove IC2(Flash Memory), Solder IC3(Mask ROM).

ZL70100-ZL82199 IC2(FLASH MEMORY) Ver 1.00

ZL93200-ZL93399

ZL92200-ZL93199 IC3(MASK ROM) Ver 1.01

ZL93400

Ver 1.01

SPECIFICATIONS/PANEL LAYOUT/EXPLODED VIEW/PARTS LIST/IDENTIFYING VERSION NUMBER/Transmitting / receiving data via MIDI/Transmitting data (Bulk dump)/Receiving data (Bulk load)/Factory settings/Restoring the factory settings (Initialization)/TEST MODE/BLOCK DIAGRAM/CIRCUIT DIAGRAM (SW BOARD)/ (SW BOARD)CIRCUIT DIAGRAM (1/2) (MAIN)/ (1/2)(MAIN)CIRCUIT DIAGRAM (MAIN)/ (2/2)(MAIN)CIRCUIT BOARD (MAIN)/ (MAIN)CIRCUIT BOARD (SW BOARD)/ (SW BOARD)ERROR MESSAGE/CHANGE INFORMATION/

boss gt 3 repair manual

Documents

circuit board main

circuit board sw board

circuit diagram sw board

block diagram

nominal output leveloutput

dbm output impedanceoutput

dbm input impedanceinput

h mm19