boss gt-3 service notes

8/3/2019 Boss GT-3 Service Notes

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SERVICE NO TES

First 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 PageS PEC IF ICA TIO NS .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. 1

PANEL LAYOUT ............................................................................................... 2

EXPLODED VIEW ............................................................................................... 3

IDENTIFYING VERSION NUMBER ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 6

Transmitting / receiving data via MIDI ...............................................................................................6

Factor y settings ............................................................................................... 8

TEST MODE ............................................................................................... 9

BLOCK DIAGRAM ............................................................................................... 1 5

CIRCUIT DIAGRAM (SW BOARD) ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 16

CIRCUIT DIAGRAM (1/2) (MAIN) . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 17

CIRCUIT DIAGRAM (2/2) (MAIN) . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 18

CIRCUIT BOARD (MAIN) . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 19

CIRCUIT BOARD (SW BOARD) ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 20

E RR OR ME SSA GE .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. 2 1

CHANGE INFORMATION . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 22

Guitar Effects Processor

SPECIFICATIONSq AD Conversion

24 bit AF Method 64 times Oversampling Modulation

q DA Conversion20 bit 128 times Oversampling Modulation

q Sampling Frequency44.1 kHz

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

q Nominal Input LevelINPUT: -10 dBmRET UR N: - 10 dB m

q Input ImpedanceINPUT: 1 MRETURN: 220 k

q Nominal Output LevelOUTPUT: 0 dBmSEND: -10 dBm

q Output ImpedanceOUTPUT: 2 k SEND: 2 k

q Dynamic Range100 dB or greater (IHF-A)

q 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 pedal

Expression pedal

< Rear >Output level knobPower switch

q Display16 characters, 2 lines (backlit LCD)

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

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

q Current Draw800 mA

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

q Weight4.0 kg/ 8 lbs 14 oz

q AccessoriesOwner's Manual English (#G6017276)

Japanese (#G6017277)Quic k S ta rt E ngli sh ( #G60 1727 9)

Japanese (#G6017278)A C a da pt or B RC -1 20 ( #0 08 99 08 9)

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

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

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

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

MIDI IMPLEMENTATIONEngli sh (#17048954)Japanese (#17048953)

* 0 dBm = 0.775 Vrms

(SW BO AR D)

(1/2) (M AIN)

(2/2) (M AIN)

(M AIN)

(SW BO AR D)

q AD24AF64

q DA20128

q 44.1 kH z

q 340140 200

q INPUT -10 dBmRETURN -10 dBm

q IN PU T 1 M RETURN 220 k

q O U T P U T 0 d B mS EN D -1 0 dB m

q O U T P U T 2 kSE ND 2 k

q 100 dBIHF -A

q SFX, CO M P/LM , W AH , OD /DS,PREAM P/SP SIM , EQ, MO D, DELA Y,CHOR US, REVERB, MASTER,PEDA L/ASSIGN LR 14UPDO W N

q 162LCD

q L (M ON O)R 1,2M IDI INOU T

q AC 14 V; AC(BO SS BR C-100)

q 800 mA

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

q 4.0 kgA C

q (#G6017277)

(#G6017276)

(#G6017279) (#G6017278)

(#40232389) (#40121767) (#40019167)AC BRC -100 (#00899078)

q F S-5U, FS-5L

EV -5(RolandFV -300LPC S-33(Roland

M IDI (#17048953) (#17048954)

0 dBm = 0.775 Vrm s


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PANEL LAYOUT

FRONT VIEW

REAR VIEW

PEDAL SWITCH PEDAL(G2187602)

SUPPORT SPRING(G2177103)

PEDAL FOOT(G2357109)

SwitchSKQKAH(13129778)

KeytopD 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)

EncoderEVQ 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)

JackHSJ0857-01-1210(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 6

w G2817131 BOTTOM COVER 1

e 71235078 MAIN BOARD ASSY (EXG) 1

r 7 12 35 08 9 S W BO ARD A SS Y SW BD1+SW BD2+SW BD3+EXP BRD 1

t 22495279 D S-KEYTOP MD3H BLK 249-279(W/WINDOW) 4

y 00904256 D S-KEYTOP D S-KEYTOP SX4H BLK 1

u 00900178 D S-KEYTOP SD4H BLK 1

i F5029404 LCD WD-C1602R-2BLYC 1

o G2567103 MAIN ESCUTCHEON 1

!0 F3479101 FFC CARD 14P L=80MM 1

!1 G3467132 WIRING 16P L=230MM 1

!2 7 12 35 08 9 S W BO ARD A SS Y 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 7 12 35 08 9 S W BO ARD A SS Y 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

@8G2357111 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 7 12 35 08 9 S W BO ARD A SS Y 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 BZC

b 40013067 SCREW M38 PAN SEMS FE ZCc 40012867 SCREW M38 PAN HEAD DOUBLE SEMS FE ZC

d 40012534 SCREW M36 BINDING S-TITE FE BZC

e 40 342701 SCREW M2.38 BINDING TAP TIGHT P ZC

f 40011312 SCREW M38 BINDING P-TITE FE BZC

g 40019123 SCREW M38 BINDING S-TIGHT BZC

h 40127689 SCREW M310 BINDING TAPTIGHT S TYPE FE BZC

i 40 342690 HEX BOLT M685 HALF THREAD BZC

j 40016001 LOCK NUT M6 U BZC

k 40015901 E-RING M2.5 SUS

l 40016067 PLAIN WASHER 6131 BZC

m 40123545 NUT M9112 (JACK) FE NI

n 40016467 JACK WASHER M9.2140.5 FENI

o 40016445 NUT (JACK) HAJ-0999-01-190

p 40016456 WASHER (JACK) HSJ-0999-01-210

q 40011878 M3 EXTERNAL TOOTH WASHER FECM

1 x6

2

3

4

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6

7

8

9

10

11

12

13

14

15

16

17 18

19

40

20

21

22

23

24

25

26

2728

39

42

b x2

r

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d x8

c x11

a x2

e

f x14

g x2

hd

f x2

m

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op

x6

x6

nm

d x3

i

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l

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k

41

x4

x7

29

30

31

32

33

34

35

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Note : Consider about the natural environment carefully before through the old lithium battery away when you exchange

to 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, BUTTON

00904256 D S-KEYTOP SX4H BLK for PANEL SW00900178 D S-KEYTOP SD4H BLK for PANEL SW

22485303 D R-KNOB L BLK 248-303

2 24 95 27 9 D S- KEY TO P MD3H BLK 249-279(W/WINDOW) for PANEL SW

12499175 G S-BUTTON S1H BLK 249-175

01340412 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, SOCKET

13449728 HEC0740-010010 ADAPTOR JACK JK1 on Main Board

13449440 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 UNIT

00905234 ECP01-5A EURO CONVERTER PLUG

PWB ASSY

# 71235078 MAIN BOAR D 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 ORDERING

When ordering any parts listed in the parts list, please specify the following items in the order sheet.

QT Y PAR T NU MBER DESC RI PTI ON MO DE L NU MBER

10 22575241 Sharp key C-20/50

15 2247017300 Knob (orange) DAC-15D

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

undelivered replacement.

Ex.

SAFETY PRECAUTION:

The parts marked have safety-

related characteristics.

U s e on l y l i s t e d pa r t s f o r

replacement.

15289109 M5216FP-600D IC (OP AMP) IC20 on Main Board

15189261 M5218AFP-600E IC (OP AMP) TAPE IC16,IC19,IC21,IC22 on Main Board

15289156 M5222FP IC (VCA FLAT) IC17 on Main Board

15289106 M5238AFP-600C IC (OP AMP) IC18 on Main Board

00565123 M66310P IC (LED DRIVER) IC2 on SW Board

01016434 M66312P IC (LED DRIVER) IC1 on SW Board

# F5229803 MX23C4000PC-10 IC MASK ROM (4M DIP) IC3 on Main Board

00346445 NJM2100M(TE3) IC (OP AMP) IC13,IC15 on Main Board

15289125 PC410KT 178FAY IC (PHOTO COUPLER) IC23 on Main Board

15199240 TA78L05S IC (V.RGL) IC10,IC11 on Main Board

00892556 TC170C140AF-003 (ESP2) IC (CUSTOM) IC8 on Main Board

01122412 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

HYBRID

01344056 SI-8501L IC REGULATOR IC26 on Main Board

TRANSISTOR

15119132 2SA1015GR(TPE2) TRANSISTOR Q103 on Main Board

15309104 2SA1586GR TE85R TRANSISTOR Q16,Q17 on Main Board

15119823 2SB-1375-O POWER TRANSISTOR Q32 on Main Board

15319108 2SC-3324GR-TE85R TRANSISTOR Q5 on Main Board

01019412 2SC2120Y TRANSISTOR Q101,Q102 on Main Board

15319107 2SC4116GR-TE85R TRANSISTOR Q1 on Main Board

15319115 2SC4213A TE85L TRANSISTOR Q4,Q6-Q10 on Main Board

15129844 2SD-2012-O TRANSISTOR Q33 on Main Board

15329103T0 2SK880GR-TE85R FET Q2,Q3,Q11 on Main Board

15329521 RN1307-TE85R TRANSISTOR Q12,Q13,Q15 on Main Board

15329533 RN2307-TE85R TRANSISTOR Q14 on Main Board

DIODE

F5019209RT 1N4004 DIODE D101-D104 on Main Board15339121 1SS-301-TE85R DIODE D11 on Main Board

15019126 1SS133 T-77 SWITCHING DIODE D1-D27 on SW Board

15339120T0 1SS302-TE85R DIODE D4,D6,D8,D9 on Main Board

15339119T0 1SS352-TPH3 DIODE D1-D3,D5,D7,D10 on Main Board

# F5029117 L-312LRD LED 8-LED13,LED18-LED27 on SW Board

15029281 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



# F5419708 CRN34331J RESISTOR ARRAY RA11 on Main Board15399389 RPC10T 471J Y10W MTL, FILM RESISTOR R62 on Main Board

POTENTIOMETER

# 01676523 RK09K12A0 10KA X2 POTENTIOMETER VR1 on Main Board

01 016167 RK11K1140(1 0K SP B) 10 KX1 POTENTIOMETER VR1 on SW Board

CAPACITOR

01128045 ERZVA7V330 CAPACITOR (VARICAP) C201 on Main Board

INDUCTOR, COIL, FILTER

12449396 BLM31A601SPT EMI FILTER L3,L4 on Main Board

12449452 BLM41A800SPT EMI FILTER L5 on Main Board

13529246 DSS310-91D223S EMI FILTER L1,L2 on Main Board

4

10 22575241 Sharp key C-20/50

15 2247017300 Knob (orange) DAC-15D

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CRYSTAL, RESONATOR

00894023 MA-406 20MHZ TE24 CRYSTAL X1 on Main Board

01453167 SG-8002DC 67.7376MHZ CRYSTAL XT1 on Main Board

ENCODER

01013223 E VQ VE M 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

BATTERY

12569249S0 CR2032 LITHIUM BATTERY 220MAH/3V

SCREWS

40016067 PLAIN WASHER 6X13X1 BZC for VR PEDAL ASSY

4 00 11 31 2 S CRE W M 38 BINDING P-TITE FE BZC for MIDI JACK

4 00 11 27 8 S CRE W M 38 BINDING P-TITE FE ZC for SW BOARD ASSY

4 00 19 12 3 S CRE W M 38 BINDING S-TIGHT BZC for SW PEDAL ASSY

# 40342701 SCREW M2.38 BINDING TAP TIGHT P ZC for LCD

4 01 27 68 9 S CRE W M 310 BINDING TAPTIGHT S TYPE FE BZC for CORD HOOK

4 00 12 86 7 S CRE W M 38 PA N HE AD D OUB LE SE MS FE ZC f or MA IN ES CU TC HE ON , S W BO ARD AS SY

40011878 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 ASSY

40016456 WASHER (JACK) HSJ-0999-01-210

40015901 E-RING M2.5 SUS for VR PEDAL ASSY

40016001 LOCK NUT M6 U BZC for VR PEDAL ASSY

# 40342712 SCREW M36 PAN MACHINE W/SW+SMALL PW BZC for BOTTOM COVER

4 00 12 53 4 S CRE W M 36 BINDING S-TITE FE BZC for BOTTOM COVER, ADAPTOR JACK HOLDER, VR PEDAL ASSY

4 00 13 06 7 S CRE W M 38 PAN SEMS FE ZC for MAIN BOARD

4012354 5 NUT M9112 (JACK) FE NI

40016467 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 BoardG2357108 BASE for BOTTOM COVER

12189815 BATTERY HOLDER BH-32 BT1 on Main Board

# G2147119 BOLT HOLDER for VR PEDAL ASSY

22360712 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 ASSY

G2357109 PEDAL FOOT for PEDAL SW ASSY

# G2147115 PEDAL HOLDER for VR PEDAL ASSY

# G2217705 PEDAL LABEL(1) 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 ASSY

G2187602 SWITCH PEDAL for PEDAL SW ASSY

# G2357112 VR PLATE for VR PEDAL ASSY

40016523 INSULOK TIE 100M/M T-18R for Main Board ASSY

ACCESSORIES (Standard)

00899078 AC ADAPTOR BRC-100

00899089 AC ADAPTOR BRC-120

00899090 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 the

same settings, or to transmit its settings to a device such as a

sequencer for storage. The process of transmitting such data is

called bulk dump, and the process of receiving such data is called

bulk load.

Transmitting data (Bulk dump)The following types of data can be transmitted. When transmitting

data, you can specify the starting and ending points of the data to be

sent, so only the desired data is transmitted.

Displ ay Data that i s transmi tted

S ys te m Ut il ity pa ra me te rs

Quick FX Effect sett ing, pedal sett ing and control assign

setting data stored in the user.

#1-1 to #35-4 The setting contents of patches 1-1 to 35-4

Temp The contents of the currently selected patch

< Connections >

When saving the data to a sequencer

Make connections as shown below, and set the sequencer to a

condition ready to receive exclusive messages.

* For details on sequencer operation, refer to the manual for the

sequencer 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 - 3

V e r . 1 . 0 1

G T-3GT-3

System

Q uick FX

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

Temp

1.

2. [M A STER ][PED A L/A SSIG N ][TU N ER /BY PA SS]

[U TILITY ]

3.


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When copying the data to another GT-3

Make connections as shown below, and set the device ID of both

units to match.

< Transmission procedure >

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

2. Use [PARAMETER] to access the following parameter (Bulk

Dump) in the display.

3. Move the cursor to "starting point" with [PARAMETER], then

select the data to be the starting point with the VALUE dial.

4. Move the cursor to "ending point" with [PARAMETER], then

select 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 previous

display 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-3

Make connections as follows. Set the GT-3 to the device ID to

which it was set when transmitting the data.

* For details on sequencer operation, refer to the manual for the

device 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-3

receives data, the following display will appear.

When data reception is complete, the following display will

appear.

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 ..." and

checks the received data. When it finishes checking the data, it

will return to the Play page.

MIDI OUT

MIDI IN

2, 3, 46 1 5

3

GT-3

ID

1.U TILITY4.M ID I

2.PAR A M ET ER Bulk D um p

3.PA RA M ET ER

V A LU E

4.PA RA M ET ER

V A LU E

5.W RITE

6.EX IT

GT-3

G T-3

ID

1. UTILITY4.M ID I

2. PA RA M ET ER Bulk Load

3. GT-3

4. EX IT

EX ITC hecking...


8/22

GT-3 Feb. 1999

8

Restoring the factory settings (Initialization)To restore the factory settings of the GT-3, do as follows. You can

initialize all settings, or only a specified section of the patch da ta in

the user area or utility settings.

The following types of data can be initialized.

D is pl ay D at a th at is in it ia li ze d

System Utility pa rameter s

Quick FX Effect set ting, pedal set t ing 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 data

you wish to initialize.

* If you decide not to initialize the settings, press [EXIT].

Initialization will be canceled, and the normal power-on

display will appear.

3. Move the cursor to "Starting Point" with [PARAMETER], then

use the VALUE dial to get the display to show the data that is

the beginning point of the initialization.

4. Move the cursor to "Ending Point" with [PARAMETER], then

get 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 then

be in its normal power-on state.

3 ,4 5 3 ,42

starting point ending piont

Factory settings

< TUNER >

TUN ER Pit ch : A =440Hz

TUNER Out: Bypas s

< MANUAL >

1: LM (COMP/LM)

2: OD (OD/DS)

3: DD (DELAY)

4: CE (CHORUS)

v : HR (MOD)

w : TU (TUNER)

< GLOBAL >

Your Setting?: Gt.Amp (Combo)

Low EQ: 0dB

High EQ: 0dB

NS Threshold: 0dB

Reverb Level: 100%

< SYSTEM >

LCD Contrast: 16

Dial Function: P.NUMBER & VALUE

SUB CTL1 Fu nc: Ass ignable

SUB CTL2 Fu nc: Ass ignable

Patch Change Mode: Wait for a Num.

BANK Extent: 85

Assign Hold: On

< MIDI >

MIDI 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 CTL2 OUT: Off

MIDI Map Select: Fix

< HARMONIST SCALE >

< AUTO RIFF PHRASE >

G T-3

System

Q uick FX

1-1 35-4 1-1 35-4

1.

2.SFXM O D

EX IT

3.PA R A M ET ER

V A LU E

4.PA R A M ET ER

V A LU E

5.W RITE

TU NER Pitch A=440Hz

TUN ER Out Bypass

1 L MCOM P /L M

2 ODOD/DS

3 DD DEL A Y

4 CECHO R U S

v H RM O D

w TUTUN E R

Your Setting? Gt.Am pCom bo

Low EQ 0dB

H igh EQ 0dB

NS Threshold 0dB

Reverb Level 100%

LCD Contrast 16

Dial Function P.NUM BER & VALU E

SUB CTL1 Func Assignable

SUB CTL2 Func Assignable

Patch Change M ode W ait for a N um .

B A N K E xtent 85

A ssign H o ld O n

MIDIM IDI RX Channel 1

M IDI Om ni M ode Om ni On

M IDI TX Channel Rx

M IDI Device ID 1

M ID I PC O U T O n

M ID I E X P O U T 7

M ID I C T L O U T 80

M IDI SUB CTL1OUT Off

M IDI SUB CTL2OUT Off

M ID I M ap Select Fix


9/22

GT-3 Feb. 1999

9

TEST MODE

CAUTION:The user data will be lost during the test mode. Save the

user 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 options

1. Display

2. LCD Contrast

3. Switch

4. EXP PEDAL5. Battery

6. MIDI IN/OUT

7. OUTPUT D/A

8. 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 CHECK

13. INPUT A/D

14. DSP Pitch Interrupt Signal

15. Noise (INOUT)

16. Noise (EXT)

17. Noise (DS)

18. Calibrate EXP

19. Factory Load

Tools required

Expression Pedal(Roland EV-5)

M ID I c ab le

N oi se meter

Oscil loscope

Audio generator

Bl an k p lu g

Entering test mode

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

Pressing buttons [MASTER] and [PEDAL/ASSIGN], turn the

power on.

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

second.

0 0 G T - 3

V 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

s s s s s s s s s s s s s s s s

s s s s s s s s s s s s s s s s

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 t

0 0 0 0 C o n t r a s t = 1 5

Turn the [VALUE] encoder dial and verify change in LCD

contrast.

1) Turn the [VALUE] encoder dial counterclockwise until

fifteen clicks are felt. The LCD will show below.


0 0 0 0 C o n t r a s t = 0

2) Turn the [VALUE] encoder dial clockwise until fifteen

clicks are felt. The LCD will show below.


0 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 on

the right are the location of these buttons.

Initially these button locations are preceded by the symbol "-".

When this symbol changes to "*", press the corresponding

button and the symbol "#" is replaced by "*".

Wrong selection calls the error message.

[M A STE R][PED A L/ASSIGN ]

PRE A M P/SP SIM EQ


10/22

GT-3 Feb. 1999

10

Normally, the buttons should be pressed in the order given

below:

(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 to

the 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]. Set

minimum 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 "***".


[ - - - ] [ * * * ] [ * * * ] o r [ - - - ] [ * * * ] [ * * * ]

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

"***".


[ * * * ] [ * * * ] [ * * * ] o r [ * * * ] [ * * * ] [ * * * ]


5. Battery

5 . B a t t e r y

0 0 0 0 3 . 2 V

The LCD will show the voltage of the battery used to back up

the 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 T

0 N o 0 C o n n e c t

Hook up [MIDI IN] socket to [MIDI OUT] socket through

the 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 T

0 V e r i f y 0 O K 0 !

7. OUTPUT D/A

7 . O U T P U T 0 D / A

0 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

[BAN K D OW N ][BAN K UP]

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

SU B E X P PE D A L/

SU B C TL 1,2

SUB EX P PED A L/SU B C TL 1,2

EX IT

M ID I INM ID I OU T

GT 3 F b 1999


11/22

GT-3 Feb. 1999

11

Mute=Off Mute=On

fig .1


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

8 . D S 0 A / D / A : L O W

0 [ G A I N 0 L O W ]

Internally generated analog test signal is converted into

digital and reconverted back to analog signal in the DS circuit

before being output to OUTPUT sockets.

NOTE: For the following measurements, first connect the

oscilloscope to OUTPUT R. Repeat the measurement by

connecting the scope to OUTPUT L(MONO) with the blank

plug inserted in OUTPUT R.

OUTPUT level control:MAX

Oscilloscope: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 H

0 [ 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.







fig. 3


10.DS A/D/A[OVERDRIVE]

1 0 . D S 0 A / D / A : O D

0 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.





EX IT

L(M O N O )R

O U TPU TL(M O NO )

L,R

L(M O N O )R

EX IT

L(M O N O )R

OU TPU T L(M O N O ) L,R

L(M O N O )

R

EX IT

L(M O N O )R

OU TPU T L(M O N O )

L,R

L(M O N O )

R

GT 3 Feb 1999


12/22

GT-3 Feb. 1999

12



fig. 4


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

1 0 . D S A / D / A : C V

0 0 [ C V C H E C K ] 0 0

The CV level sweeps from 0 to 100. Verify smooth waveform

level change.

NOTE: This test cannot be interrupted until one CV sweep

cycle completes. (0-100-0)







CV CHECK=0 CV CHECK=100

fig. 5


12. EXT OD CHECK

1 2 . E X T 0 O D 0 C H E C K

0 0 [ D S P E X T O U T ]

Check the signal path:

A) Connect the oscilloscope to either OUTPUT socket and

verify 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 verify

discontinued 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(M O N O )R


L,R

L(M O N O )

R

EX IT

L(M O N O )R


L,R

L(M O N O )

R

EX IT

/)

/)

/)

/)

/)

GT-3 Feb 1999


13/22

GT-3 Feb. 1999

13

fig. 6


13.INPUT A/D

1 3 . I N P U T A / D

0 0 [ I N - - - - - O U T ]

Feed a rectangular waveform to the unit and verify the

corresponding output.





INPUT:Rectangular Waveform, 400Hz, 40mVp-p



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 and

won'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 ]






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 ]







78dBm (IHF-A).

Inser t a b l ank

p l u g i n t o t h e

RETURN socket.

EX IT

L(M O N O )R


L,R

L(M O N O )

R

EX IT

, 400Hz, 40mVp-p

L(M O N O )R


L,R

L(M O N O )

R

EX IT

L(M O N O )R OU TPU T L(M O N O )

L,R

L(M O N O )

R

/)

GT-3 Feb. 1999


14/22

GT 3 Feb. 1999

14

ESP A/D INPUT

D/A SEND

ESP A/D RETURN

D/A OUTPUT



17.Noise(DS)

1 7 . N o i s e ( D S )

0 0 [ D S - - - - - O U T ]







54dBm (IHF-A).

ESP A/D INPUT

D/A

DS Circuit

ESP A/D

D/A OUTPUT



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 at

the 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 thepedal.

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 preset

data.

EX IT

L(M O N O )R


L,R

L(M O N O )

R

EX IT

W R ITE

W R ITE

W R ITE

/)

/)

GT-3 Feb. 1999


15/22

15

A

B

C

D

EF

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

CN3

IC14

CODEC

AK4522

IC8 DSP

IC9

DRAM 4M

IC7

SRAM 1M

IC2 or IC3

ROM 4M

LCD UNIT

SW 2 BOARD ASSY

PEDAL SW,LED

IC12

CODEC

AK4522

OUTPUT L

OUTPUT R

RETURN

SEND

PHONES

MIDI OUT IN

OUTPUTVOLUME

IC1 CPU

H8/3006

SUB EXP PEDAL

SUB CTL 1,2

INPUT

Analog

Distortion

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 ASSY

PANEL SW,LED

ENCODER

CN4

EXP BOARD ASSY

PEDAL VR

CN5CN4

MAIN BOARD ASSY

BLOCK DIAGRAM/

GT-3 Feb. 1999


16/22

16

A

B

C

D

EF

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

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 ASSY

71235089

READ5

TO CN4 ON MAIN BOARD

EXP BOARD ASSY

71235089

(10KSPB)

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

12D7

1SS133

1 2SW6

SKQKAH

12D6

1SS133

1 2SW7

SKQKAH

12D5

1SS133

1 1

2 2

3 3

CN311

22

33

CN2

RIBON CABLE3P

12D4

1SS133

1 2SW4

SKQKAH

1 2SW5

SKQKAH

1 2SW2

SKQKAH

12D2

1SS133

12D3

1SS133

1 2SW3

SKQKAH

12D1

1SS133

1 2SW1

SKQKAH

11

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9

9

10 1011 11

12 12

13 13

14 14

CN16216 014 110 808

2A2B2C2D2E

A14

OE13

CKL12

R10

CKS11

VCC

16

GND

8

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

1QA15

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

1

1

2

2

3

3

CN5WIRING3P

12D24

1SS133

12D17

1SS133

1 2SW24

SKQKAB

1 2SW17

SKQKAB

12D19

1SS133

12D22

1SS133

1 2SW22

SKQKAB

12D15

1SS133

1 2SW15

SKQKAB

1 2SW19

SKQKAB

12D8

1SS133

12D11

1SS133

1 2SW11

SKQKAB

1 2SW8

SKQKAB1 2 3 4

EN1EVQVEMF01 24B

1 1CN6

WIRINGSW

1 2SW9

SKQKAB

1 2SW10

SKQKAB

12D9

1SS133

12D10

1SS133

12D12

1SS133

12D13

1SS133

1 2SW12

SKQKAB

1 2SW13

SKQKAB

12D16

1SS133

12D14

1SS133

1 2SW20

SKQKAB

1 2SW16

SKQKAB

1 2SW14

SKQKAB

1 2SW18

SKQKAB

12D18

1SS133

12D20

1SS133

12D21

1SS133

12D23

1SS133

1 2SW23

SKQKAB

1 2SW21

SKQKAB

12D27

1SS133

12D26

1SS133

12D25

1SS133

1 2SW27

SKQKAB

1 2SW26

SKQKAB

1 2SW25

SKQKAB

1H

1F

R121k

R131k

1L

1J

R101k

R111k

1P

1N

R81k

R91k

1A1B1C1D

QA1

QB2VC

C

3

A4

OE5

CKL6

R7

CKS8

GND

9

SQP 10

QO 11

QP 12

QN 13QM

14QL15

QK 16QJ 17QI 18QH 19QG 20QF 21QE 22QD 23QC 24

IC2M66310P

1 1

22

33

4 4

5 5

6 6

7 7

88

9 9

10 10

11 11

12 12

1313

1414

1515

16 16

17 17

18 18

CN4

6216 018 110 808

1E1F1G1H1I1J1K1L1M1N1O1P

1O 1M

1

2

LED8L-312LRD

1

2

LED9L-312LRD

1I1K

1

2

LED10L-312LRD

1

2

LED11L-312LRD

1D1E1G

1

2

LED12L-312LRD

1

2

LED13L-312LRD

1B1C 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


17/22

17

A

B

C

D

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F

G

H

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K

L

M

N

O

P

Q

R

S

T

U

V

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

SWREAD0

SWSCAN3

SWREAD5

SWREAD4

SWREAD3

SWREAD1

LED CKS

LED A

SQH

+5VGND

LED CKL

SW

BOARD

2

TO

CN1

ON

SWSCAN1

ENC A

ENC B

SWSCAN2

SWSCAN0

SWREAD6

SWREAD5

SWREAD4

SWREAD3

SWREAD2

SWREAD1

SWREAD0

LED CKS

SWREAD6SWREAD2

GND

+5V

GND

SQH

LED CKL

To

CN4

ON

SW

BOARD

1

SW READ

forEMI

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

C27210/166

57

IC22BM5218AFP

1

2

3Q15RN1307

2

31

IC22AM5218AFP

R87100k

R862.2k

C960.01

R8810k

R8410k

R8510k

R901M

R89

100

C273

47/161

3

2

Q162SA1586GR

D71SS352

R7110k

MUTE

DS_SWOD_SWGAIN_SW

C900.1

R7 2 1 20

C870.1

56

IC24C74HC04

98

IC24D74HC04

1110

IC24E74HC04

1312

IC24F74HC04

14

7

IC24G74HC04

A1

K3 GND 4VO 5

VCC 6IC23

PC-410KT

6 4 5 3 2 1

JK2YKF51-5054

C910.1

L3 BLM31B601

L4 BLM31B601

D101SS352

R7 3 1 00

R7 0 2 20

R6 8 2 20

R6647k

R67

3.3k

R6910k

34

IC24B74HC04

12

IC24A74HC04

1

3

2Q172SA1586GR M_MUTE

M_OUT

M_IN

C7515p

C7615p

X1

MA-406(20MHz)

C590.1

CS_DSP

345

6

IC6B74HC10AFN

91011

8

IC6C74HC10AFN

14

7

IC6D74HC10AFN

13 12

IC5F74HC04AFN

11 10

IC5E74HC04AFN C58

0.1

1213

12

IC6A74HC10AFN

1 2

IC5A74HC04AFN

3 4

IC5B74HC04AFN

5 6

IC5C

74HC04AFN

9 8

IC5D74HC04AFN

14

7

IC5G74HC04AFN

C430.1

R54

150

R8310k

C21210/16OUT

3

OE1

VCC4

GND 2

XT1SG-8002DC

L5BLM41A800

DS_SW

GAIN_SW

GAIN_CV

OD_SW

MUTEADA_PD

C410.1

C21310/16

C420.1A826

A725

A624

A523

A422

A319

A218

A117

A016

NC11

NC12

NC15

NC30

RAS14

UCAS28

LCAS29

WE13

OE27

I/O15 39

I/O14 38

I/O13 37

I/O1236

I/O11 34

I/O1033

I/O9 32

I/O831

I/O7 10

I/O6 9

I/O5 8

I/O4 7

I/O3 5

I/O24

I/O13

I/O02

VCC 1

VCC 6

VCC 20

VSS21

VSS35

VSS 40

IC9

V53C16256HK50

EA8EA7EA6

CD7CD6CD5CD4CD3CD2CD1CD0

64

65

29

53

7475767778798182838485868788

9293949596979899

687069

6667

51

130131

125128

120121

111112113114

115116

626160595857

133

101102103104105106107

132

13613713813914014114227262524232221201716

15

1413

4948474645444342393837

3635343332109876543

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

IC8

TC170C140AF-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

VCC

70

VCC

37

VCC

3

VSS

94

VSS

67

VSS

59

VSS

46

VSS

24

VSS

13

AVCC

78

VREF

79

AVSS

88

A19 58

A1857

A1756

A1655

A1554

A14 53

A13 52

A12 51

A11 50

A10 49

A948

A847

A745

A644

A5 43

A4 42

A3 41

A2 40

A139

A0 38

D1536

D1435

D1334

D12 33

D11 32

D10 31

D9 30

D8 29

LWR74

HWR73

RD 72

AS 71

RES 65

RESO12

STBY 64

NMI 66

MD277

MD176

MD075

P67/PHAI63

P62/BACK62

P61/BREQ61

P60/WAIT60

P77/AN7/DA187

P76/AN6/DA086

P75/AN585

P74/AN484

P73/AN383

P72/AN282

P71/AN181

P70/AN080

P84/CS093

P83/IRQ3/CS1/AD92

P82/IRQ2/CS291

P81/CS3/IRQ190

P80/IRQ0/RFSH89

PA7/TP7/TIOCB2/2

PA6/TP6/TIOCA2/1

PA5/TP5/TIOCB1/100

PA4/TP4/TIOCA1/99

PA3/TP3/TIOCB0/98

PA2/TP2/TIOCA0/97

PA1/TP1/TCLKB/T96

PA0/TP0/TCLKA/T95

PB7/TP15/RXD211

PB6/TP14/TXD210

PB5/TP13/LCAS/S9

PB4/TP12/UCAS8

PB3/TP11/TMIO3/7

PB2/TP10/TMO2/C6

PB1/TP9/TMIO1/D5

PB0/TP8/TMO0/CS4

P95/SCK1/IRQ519

P94/SCK0/IRQ418

P93/RXD117

P92/RXD016

P91/TXD115

P90/TXD014

P47/D728

P46/D627

P45/D526

P44/D425P43/D323

P42/D222

P41/D121

P40/D020

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 1

2 2

3 3

CN4

CN3P

R582.2k

R562.2k

C630.033

R57

47k

R59

47k C640.033

XB

XA

LCD7LCD6LCD5LCD4LCD3LCD2LCD1LCD0

GAIN_CV

MUTEL_EL_R/W

L_RS

RD5RD4RD3

RD1RD0

M_OUTA

CKS

M_MUTEM_IN

CKL


RD

WR

CA16CA15CA14CA13CA12CA11CA10CA9CA8CA7CA6CA5CA4CA3CA2CA1CA0

CA17CA18

C770.1

A173

A1634

A1535

A1436

A1337

A1238

A1139

A1040

A941

A842

A74

A65

A56

A47

A38

A29

A110

A011

DQ15/A-131

NC2

CE12

WE43

OE14

BYTE33

DQ14 29

DQ13 27

DQ12 25

DQ11 22

DQ1020

DQ918

DQ816

DQ7 30

DQ6 28

DQ5 26

DQ4 24

DQ3 21

DQ2 19

DQ1 17

DQ015

RP44

VPP 1

VCC 23

VSS13

VSS32

IC2

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

RDWR

DINT1DINT0

CS_DSP


C880.1

R4 9 1 80

R5 1 1 00

R5 0 1 00

EA5EA4EA3EA2EA1EA0

ERAS

ECASEWE

ED5ED4

ED9ED8ED7ED6

ED10ED11

ED7ED6ED5ED4

ED8ED9ED10ED11

CD7CD6CD5CD4CD3CD2CD1CD0 R52

100

R53100

C80

0.1


CA17CA18

CA19

A1831

A1730

A162

A153

A1429

A1328

A124

A1125

A1023

A926

A827

A75

A66

A57

A48

A39

A210

A111

A012

CE22

OE24

D7 21

D6 20

D5 19

D418

D317

D215

D114

D0 13

NC 1

VCC 32

VSS16

IC3MX23C4000PC-10(ZL92200-Z93199)

( ZL 93 400 - )

C78

0.1

C79

0.1

SC3SC2SC1SC0

C74

0.1

ACKS

SC3SC2

4321

5678

RA11CRN34331J

CKL

4321

5678

RA9CRN34101J

4 3 2 1

5 6 7 8

RA10CRN34104J

C730.1

11

22

33

4 4

5 5

6 6

7 7

8 8

99

1010

1111

1212

13 13

14 14

CN25597-14APB

C20910/16

11

22

33

4 4

5 5

6 6

7 7

8 8

99

1010

1111

1212

13 13

14 14

15 15

16 16

17 17

1818

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

5678

RA6CRN34102J

4321

5678

RA8CRN34102J

C720.1

SC1SC0

RD6RD5RD4

RD3RD2RD1

C27410/16

CA2CA1CA0


CA15

CA19

CA16A162

A1531

A143

A1328

A124

A1125

A1023

A926

A827

A75

A66

A57

A48

A39

A210

A111

A012

CS122

R/W29

OE24

D013

D1 14D2 15D3

17D4 18D5 19D6 20D7 21

CS230

NC 1

VDD32

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

BCK

AD1AD0

DA0DA1

256fsfs64fs


RST

C27110/16

R63

10k

R651M 3

1D11A1SS301

32

D11B1SS301

R64

10k

CA0

WR

RD

CS_RAM

C86

0.1

3

14

5

2

IC25TC75S51F

D11SS352

OUT 6

NC 8

GND 4

VCC7

NC1

NC2

NC3

CD5

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

3

Q12SC4116GR

R62470

R60470

C810.1

C650.1

C21010/16

C620.1

C20810/16

4321

5678

RA1CRN34101J

4321

5678

RA2CRN34101J

4321

5678

RA3CRN34101J

C830.1

11

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

1010

11 11

1212

13 13

14 14

15 15

16 16

CN1A2541WR2-2A16NP

LCD0LCD1LCD2LCD3

LCD4LCD5LCD6LCD7

L_RSL_R/WL_E

BT1BH-32

MIDIand Flash

DSP and SRAM

/ (1/2) (MAIN)

GT-3 Feb. 1999


18/22

18

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

CIRCUIT DIAGRAM (2/2) (MAIN)

PHONE

INPUT

OUTPUT L

OUTPUT R

RETURN

SEND

Power SW

JK6HSJ0857-01-1210

C10610p

R118

47k

C1040.001

R202

47/2W

R20347/2W

1

2

3

Q9

2SC4213A

1

2

3

Q82SC4213A

R105

1k

R106

1k

C11210p

C1140.1

C1130.1

6

57

IC19BM5218AFP

C1070.1

C259470/16

C260470/16

8

4

IC20C

M5216AFP

C25547/16

R11710k

R12610k

R12556k

C1090.1

C190.1

C200.1

8

4

IC19C

M5218AFP

C25310/16

C224100/16

C223100/16

C130.1

C180.1

R29

470

R3110

VREFH1

AINR+2

AINR-3

AINL+4

AINL-5

VA6

AGND7

DIF08

DIF19

LRCK10

SCLK11

SDTI12

SDTO13

SMUTE14

DEM015

DEM116

MCLK17

VD18

DGND19

PD20

CMODE21

AOUTL22

AOUTR23

VCOM24

IC14

AK4522AF

C229100/16

C225

100/16C2310p

6

57

IC15BNJM2100M

R23100k

R2618k

C249

10/166

57

IC18B

M5238FP

R13110k

C1190.01

R130

1.2kR12918k

C118NotIn 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

C25

10p

2

31

IC15ANJM2100M

R2818k

R256.8k

C260.1

R27

4.7k

R244.7k

R30470

C150.0022

C140.1

C22647/10

C2284.7/50

C25210/16

R33100

C11510p

R127

10k2

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

Q7

2SC4213A

R10910k

C258

100/16

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

Q6

2SC4213A

C108150p

8

4

IC15CNJM2100M

C240.1

C170.0022

C160.1

C2274.7/50

C261

10/16

R92220k

C9910p

6

57

IC21B

M5218AFP

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

12

Q2

2SK880GR

C60.1

C50.1

R172.2M

R1410k

R1668k

IN12

IN26

CV5

COM 3

OUT11

OUT27

VCC8

GND4

IC17

M5222FPR15270

R4233k

R38

10

C222100/16

C340.1

C270.1

C330.1

C320.1

VREFH1

AINR+2

AINR-3

AINL+4

AINL-5

VA6

AGND7

DIF08

DIF19

LRCK10

SCLK11

SDTI12

SDTO13

SMUTE14

DEM015

DEM116

MCLK17

VD 18

DGND19

PD20

CMODE21

AOUTL22

AOUTR23

VCOM24

IC12

AK4522AF

C218100/16

C217100/16

C216100/16

C1000.1

8

4

IC21CM5218AFP

C101

0.1

C267100/16

C266

100/16

MUTE

GAIN_SW

GAIN_CVOD_SW

DS_SW

AD1DA1

JK5HTJ-064-12I

R94

1k

R95100k

R96100k

R97

1kR98

4.7k

1

2

3

Q10

2SC4213AC269

10/16

C10210p

2

31

IC21AM5218AFP

C262

10/16

C268

10/16

R10347k

R10410k

C1030.001

R102

22k

R36

470

C290.0022

C280.1

C21947/10

C400.1

R43

4.7k

R464.7k

C3710p

6

57

IC13BNJM2100M

R45

47k

R4422k

C2214.7/50

R2110k

R20

4.7k

C245

10/16

C246

10/16

C2481000/10

R18

27k

2

3D6B1SS302

3

1

D6A

1SS302

6

57

IC16BM5218AFP

R1147k

R1347k

C2

47p

C247

10/16

C24410/16

31D4A

1SS302

23D4B

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

C202

2200/25

D101

1N4004

C840.1

C850.1

1

2

3Q4

2SC4213A

R22

47k

IN6

S.S2

GND

3

OUT1

LIN4

IC26SI-8501L

C203470/10

C3910p

C380.1

8

4

IC13CNJM2100M

2

31

IC13A

NJM2100M

R47100k

C2204.7/50

R37470

C310.0022

C300.1

R3968

C11

0.1

C90.1

C100.1

IN1

OUT3

GND

2

IC10TA78L05S

C214100/16

C215100/16C7

0.1C80.1C231

100/25

C230100/25

3

12

Q1012SC2120Y

IN1

OUT3

GND

2

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

12

Q1022SC2120Y

3

21

Q1032SA1015GR

C235100/25

C232100/25

3

21

Q322SB1375

3

12

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


19/22

19

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

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 isincorrectly replaced.Replace only with the same or equivalenttype recommended by manufacturer.

Discard used batteries according to themanufacturer's instructions.

VARNING!

Explosionsfara vid felaktigt batteribyte.Anvnd samma batterityp eller en

ekvivalent typ som rekommenderas avapparattillverkaren.Kassera anvnt batteri enligtfabrikantens instruktion.

VAROITUS!Paristo voi rjht, jos se on

virheellisesti asennettu.Vaihda paristo ainoastaanlaitevalmistajan suosittelemaantyyppiin. Hvit kytetty paristo

valmistajan ohjeiden mukaisesti.

For Nordic Countries

View from component side. View from foil side.

/ (MAIN)

GT-3 Feb. 1999


20/22

20

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

CIRCUIT BOARD (SW BOARD) / (SW BOARD)

GT-3 Feb. 1999


21/22

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 from

that written to it.

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

D R A M : - - 0 G R A M : - -

Symptom:IRAM of DSP(IC8) returns data which is different from

that 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 from

that 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, 92-99

ROM(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 that

written to it through DSP(IC8).

CPU(IC12) :pins 38-45, 47-58, 29-36

DSP(IC8) :pins 68-70, 74-79, 81-88, 92-99

ROM(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

DRAM(IC9) :pins 2-10, 16-19, 22-26

Battery Check

4 . B a t t e r y

0 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, the

display shows "Low".

4 . B a t t e r y

N 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 error

condition still exists, check the following parts and associatd

wirings.

CPU(IC1):pin 80

OP.Amp(IC25):pins 1-5

Resistor(R63, R64, R65)

Diode(D11)

Capacitor(C86)

MIDI Check

5 . M I D I 0 I N / O U T

N o 0 C o n n e c t

Symptom:No connect MIDI IN jack to MIDI OUT jack via the

MIDI cable.

5 . M I D I 0 I N / O U T

V e r i f y 0 E R R O R

Symptom:Transmitted data (MIDI OUT) and received data (MIDI

IN) don't agree with eack other.


MIDI IN

CPU(IC1):pin 16

Resister(R71,R72,R73)

Capacitor(C90)

Photo Coupler(IC23)

Diode(D10)MIDI OUT

CPU(IC1):pins 14, 28

Resister(R66,R67,R68,R69,R70)

Gate IC(IC24):pins 1-4

Transistor(Q17)

Inductor(L3,L4)

(M IDI OU T )(M IDI

IN)

GT-3 Feb. 1999


22/22

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 2

DSP(IC8):pin 67

CHANGE INFORMATION

Rom Version UP

Effective

ZL70100-ZL82199 IC2(FLA SH MEMORY) V er 1 .00

ZL93200-ZL93399

ZL92200-ZL93199 IC3(MASK ROM) Ver 1.01

ZL93400 up

Ver 1.01

The 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 M EM OR Y) Ver 1.00

ZL 93200-ZL 93399

ZL92200-ZL93199 IC3(M ASK RO M ) Ver 1.01

ZL93400

V er 1.01

boss gt-3 service notes

Documents