Text preview for : boss GT-3.pdf part of Boss GT3 GT3 multi effects service manual
Back to : boss GT-3.pdf | Home
GT-3 Feb. 1999
SERVICE NOTES SPECIFICATIONS
q AD Conversion q
First Edition 24 bit AF Method 64 times Oversampling Modulation
q DA Conversion q
Issued by RJA 20 bit 128 times Oversampling Modulation
Guitar Effects Processor q Sampling Frequency
44.1 kHz
q
q Program Memories q
340: 140 (User) + 200 (Preset)
q Nominal Input Level q
TABLE OF CONTENTS Page INPUT:
RETURN:
-10 dBm
-10 dBm
SPECIFICATIONS ............................................................................................... 1 q Input Impedance q
INPUT: 1 M
PANEL LAYOUT ............................................................................................... 2 RETURN: 220 k
EXPLODED VIEW ............................................................................................... 3 q Nominal Output Level q
IDENTIFYING VERSION NUMBER ............................................................................................... 6 OUTPUT: 0 dBm
SEND: -10 dBm
Transmitting / receiving data via MIDI ............................................................................................... 6
q Output Impedance q
Factory settings ............................................................................................... 8 OUTPUT: 2 k
SEND: 2 k
TEST MODE ............................................................................................... 9
q Dynamic Range q
BLOCK DIAGRAM ............................................................................................... 15 100 dB or greater (IHF-A)
CIRCUIT DIAGRAM (SW BOARD) ............................................................................................... 16 q Controls q
< Front >
CIRCUIT DIAGRAM (1/2) (MAIN) ............................................................................................... 17 Value dial
CIRCUIT DIAGRAM (2/2) (MAIN) ............................................................................................... 18 Effect select buttons
SFX, COMP/LM, WAH, OD/DS,
CIRCUIT BOARD (MAIN) ............................................................................................... 19 PREAMP/SP SIM, EQ, MOD, DELAY,
CHORUS, REVERB, MASTER,
CIRCUIT BOARD (SW BOARD) ............................................................................................... 20 PEDAL/ASSIGN
Exit button
ERROR MESSAGE ............................................................................................... 21 Parameter buttons L/R
Write button
CHANGE INFORMATION ............................................................................................... 22 Manual button
Utility button
Tuner/Bypass button
Number pedals 1-4
Bank pedals up/down
Control pedal
Expression pedal
< Rear >
Output level knob
Power switch
q Display q
16 characters, 2 lines (backlit LCD)
q Connectors q
Input jack
Output jacks L(MONO)/R
Headphones jack (stereo mini type)
Send jack
Return jack
Sub expression pedal/Sub control pedal 1,2 jack
MIDI Connectors IN/OUT
q Power Supply q
AC 14 V; Supply AC adaptor
(BOSS BRC-120, 230, 240)
q Current Draw q
800 mA
q Dimensions q
487 (W) × 222 (D) × 97 (H) mm
19-3/16 (W) × 8-3/4 (D) × 3-7/8 (H) inches
q Weight q
4.0 kg/ 8 lbs 14 oz
q Accessories q
Owner'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)
q Options q
Foot Switch:FS-5U, FS-5L
Expression Pedal:
EV-5 (Roland)
Copyright © 1999 by ROLAND CORPORATION FV-300L+PCS-33 (Roland)
MIDI IMPLEMENTATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION. English (#17048954)
Japanese (#17048953)
* 0 dBm = 0.775 Vrms 1
17059955 Printed in Japan AA00 (DP)
GT-3 Feb. 1999
A PANEL LAYOUT / Keytop
D S-KEYTOP SX4H BLK
(00904256)
Keytop
D S-KEYTOP SD4H BLK
(00900178)
Keytop
B FRONT VIEW D S-KEYTOP MD3H BLK
(22495279)
Switch
SKQKAB
LED
L-312LRD
(01780101) (F5029117)
C LED
L-312LRD
(F5029117)
LCD Cover
DISPLAY COVER
Knob
D R-KNOB L BLK
(22485303)
Switch
SKQKAB
(G2567104) (01780101) VR PEDAL
D Switch
SKQKAB TOP COVER LCD
WD-C1602R-2BLYC
Encoder
EVQ VEM F01 24B
PEDAL LABEL (DOWN)
(G2217709)
PEDAL LABEL (UP)
(G2187517)
VR PLATE
(G2357112)
(01780101) (G2017129) (01013223)
(F5029404) (G2217711)
E
F
G
H
I LED
GL-3PR8
J (15029281)
Spacer
SPACER 3*6*10
K (H2369401)
L
M PEDAL SWITCH PEDAL
(G2187602)
N SUPPORT SPRING
PEDAL ESCUTCHEON (G2177103)
(G2227301)
PEDAL FOOT
O PEDAL LABEL (1) PEDAL LABEL (2) PEDAL LABEL (3) PEDAL LABEL (4) PEDAL LABEL (CTL)
(G2357109)
(G2217705) (G2217706) (G2217707) (G2217708) (G2217710) Switch
P SKQKAH
(13129778)
REAR VIEW Knob Knob
Q P R-KNOB SF-A BLK/LCG
(01340412)
G S-BUTTON S1H BLK
(12499175)
Jack Jack Cord Hook
R VR
RK09K12A0 (10kA x2)
(01676523)
HSJ0857-01-1210
(13449440)
HTJ-064-12D
(13449150MF)
Switch
SDKLA1-B
(01676512)
CORD HOOK 236-712
(22360712)
S
T
U BOTTOM COVER Jack Jack
(G2817131) Jack YKF51-5054 HEC0740-010010
V HTJ-064-12I
(13449155MF)
(13429825) (13449728)
2
GT-3 Feb. 1999
A EXPLODED VIEW /
[Part]
B NO.
q
PART CODE PART NAME
G2357108 FOOT
DESCRIPTION Q'TY
6
30
w G2817131 BOTTOM COVER 1
C e
r
71235078
71235089
MAIN BOARD ASSY
SW BOARD ASSY
(EXG)
SW BD1+SW BD2+SW BD3+EXP BRD
1
1 31
t 22495279 D S-KEYTOP MD3H BLK 249-279(W/WINDOW) 4 1 x6
D y
u
00904256
00900178
D S-KEYTOP
D S-KEYTOP
D S-KEYTOP SX4H BLK
SD4H BLK
1
1
d x8
m 29
i F5029404 LCD WD-C1602R-2BLYC 1 32
E o
!0
G2567103
F3479101
MAIN ESCUTCHEON
FFC CARD 14P L=80MM
1
1
a x2
n
!1 G3467132 WIRING 16P L=230MM 1
F !2
!3
71235089
G2017129
SW BOARD ASSY
TOP COVER
SW BD1+SW BD2+SW BD3+EXP BRD 1
1
!4 G2227301 ESCUTCHEON 7
37
G !5
!6
G2187602
G2177103
SWITCH PEDAL
SUPPORT SPRING
7
7 38
!7 G2357109 PEDAL FOOT 7
H !8
!9
22360712
12499175
CORD HOOK
G S-BUTTON S1H BLK
236-712
249-175
1
1
r
33
@0 01340412 P R-KNOB SF-A BGLK/LCG 1 3
@1
I @2
@3
G2147116
71235089
G2187517
SHAFT STAY
SW BOARD ASSY
VR PEDAL
SW BD1+SW BD2+SW BD3+EXP BRD
1
1
1
2
b x2
34
35
@4 G2147117 PIN STAY 1 42
J @5
@6
G2147115
G2147119
PEDAL HOLDER
BOLT HOLDER
1
1
39 q
36
@7 G2357110 CUSHION F 1 c x11
K @8
@9
G2357111
G2357112
CUSHION R
VR PLATE
1
1
41
26
#0 G2567104 DISPLAY COVER LCD COVER 1 25
L
4
#1 22485303 D R-KNOB L BLK 248-303 1
#2 G2217705 PEDAL LABEL(1) 1
#3 G2217706 PEDAL LABEL(2) 1 10
M #4
#5
G2217707
G2217708
PEDAL LABEL(3)
PEDAL LABEL(4)
1
1
7
f x14
i
6
#6 G2217710 PEDAL LABEL(CTL) 1 e
N
5 x4
#7 G2217709 PEDAL LABEL(DOWN) 1 28 l 27
d x3
#8 G2217711 PEDAL LABEL(UP) 1 12 40 22 k
#9 F3479102 FFC CARD 18P L=115MM 1 8
O $0
$1
71235089
12569249S0
SW BOARD ASSY
LITHIUM BATTERY 220MAH/3V
SW BD1+SW BD2+SW BD3+EXP BRD
CR2032 (=12569249)
1
1
n
l
$2 40016523 INSULOK TIE 100M/M T-18R << ORDERING PER 1000 PCS >> 11 21
m j 24
P [Screw]
23
NO. PART CODE PART NAME DESCRIPTION
Q a
b
40342712
40013067
SCREW M3×6
SCREW M3×8 PAN
PAN MACHINE W/SW+SMALL PW BZC
SEMS FE ZC
n x6
m x6
c 40012867 SCREW M3×8 PAN HEAD DOUBLE SEMS FE ZC
20
d
R e
40012534
40342701
SCREW M3×6 BINDING
SCREW M2.3×8
S-TITE FE BZC
BINDING TAP TIGHT P ZC
9
f 40011312 SCREW M3×8 BINDING P-TITE FE BZC
p o
g 40019123 SCREW M3×8 BINDING S-TIGHT BZC
S h
i
40127689
40342690
SCREW M3×10
HEX BOLT M6×85
BINDING TAPTIGHT S TYPE FE BZC
HALF THREAD BZC
16
14
19 f x2
13
j 40016001 LOCK NUT M6 U BZC
T k
l
40015901
40016067
E-RING
PLAIN WASHER
M2.5 SUS
6×13×1 BZC 15
17 18
h
d
g x2 x7
m 40123545 NUT M9×11×2 (JACK) FE NI
U n
o
40016467
40016445
JACK WASHER
NUT (JACK)
M9.2×14×0.5 FENI
HAJ-0999-01-190
p 40016456 WASHER (JACK) HSJ-0999-01-210
V q 40011878 M3 EXTERNAL TOOTH WASHER FECM
3
GT-3 Feb. 1999
15289109 M5216FP-600D IC (OP AMP) IC20 on Main Board
PARTS LIST / 15189261 M5218AFP-600E IC (OP AMP) TAPE IC16,IC19,IC21,IC22 on Main Board
CONSIDERATIONS ON PARTS ORDERING 15289156 M5222FP IC (VCA FLAT) IC17 on Main Board
SAFETY PRECAUTION:
The parts marked have safety-
When ordering any parts listed in the parts list, please specify the following items in the order sheet. 15289106 M5238AFP-600C IC (OP AMP) IC18 on Main Board
QTY PART NUMBER DESCRIPTION MODEL NUMBER
related characteristics. Ex. 10 22575241 Sharp key C-20/50 00565123 M66310P IC (LED DRIVER) IC2 on SW Board
Use only listed parts for
replacement.
15 2247017300 Knob (orange) DAC-15D 01016434 M66312P IC (LED DRIVER) IC1 on SW Board
Failure to completely fill the above items with correct number and description will result in delayed or even
undelivered replacement. # F5229803 MX23C4000PC-10 IC MASK ROM (4M DIP) IC3 on Main Board
00346445 NJM2100M(TE3) IC (OP AMP) IC13,IC15 on Main Board
4
15289125 PC410KT 178FAY IC (PHOTO COUPLER) IC23 on Main Board
10 22575241 Sharp key C-20/50 15199240 TA78L05S IC (V.RGL) IC10,IC11 on Main Board
15 2247017300 Knob (orange) DAC-15D
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
Note : Consider about the natural environment carefully before through the old lithium battery away when you exchange # F5279510 V53C16256HK50 IC (DRAM 4M) IC9 on Main Board
to the new one.you exchange to the new one.
HYBRID
NOTE1 : *1 The parts marked # are new (initial parts). 01344056 SI-8501L IC REGULATOR IC26 on Main Board
NOTE2 : *2 The parts marked have safety-related characteristics.
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
*1 *2
15319107 2SC4116GR-TE85R TRANSISTOR Q1 on Main Board
15319115 2SC4213A TE85L TRANSISTOR Q4,Q6-Q10 on Main Board
CASING
15129844 2SD-2012-O TRANSISTOR Q33 on Main Board
# G2817131 BOTTOM COVER 15329103T0 2SK880GR-TE85R FET Q2,Q3,Q11 on Main Board
# G2017129 TOP COVER 15329521 RN1307-TE85R TRANSISTOR Q12,Q13,Q15 on Main Board
# G2187517 VR PEDAL for VR PEDAL ASSY 15329533 RN2307-TE85R TRANSISTOR Q14 on Main Board
KNOB, BUTTON DIODE
00904256 D S-KEYTOP SX4H BLK for PANEL SW F5019209RT 1N4004 DIODE D101-D104 on Main Board
00900178 D S-KEYTOP SD4H BLK for PANEL SW 15339121 1SS-301-TE85R DIODE D11 on Main Board
22485303 D R-KNOB L BLK 248-303 15019126 1SS133 T-77 SWITCHING DIODE D1-D27 on SW Board
22495279 D S-KEYTOP MD3H BLK 249-279(W/WINDOW) for PANEL SW 15339120T0 1SS302-TE85R DIODE D4,D6,D8,D9 on Main Board
12499175 G S-BUTTON S1H BLK 249-175 15339119T0 1SS352-TPH3 DIODE D1-D3,D5,D7,D10 on Main Board
01340412 P R-KNOBSF-A BGLK/LCG # F5029117 L-312LRD LED 8-LED13,LED18-LED27 on SW Board
15029281 GL-3PR8 LED 1-LED5 on SW Board
SWITCH # F5339310 RD10ESAB2 ZENER DIODE D105,D106 on Main Board
# 01676512 SDKLA1-B PUSH SWITCH SW1 on Main Board
# 01780101 SKQKAB TACT SWITCH SW8-SW27 on SW Board RESISTOR
13129778 SKQKAH TACT SWITCH SW1-SW7 on SW Board # 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
JACK, SOCKET # F3829254 47OHM(2W) CARBON RESISTOR R202,R203 on Main Board
13449728 HEC0740-010010 ADAPTOR JACK JK1 on Main Board # F5399901 6.8KOHM(F-RANK 1%) CHIP RESIST0R R25 on Main Board
13449440 HSJ0857-01-1210 PHONE JACK (MINI) JK6 on Main Board # F5419707 CRN34101J RESISTOR ARRAY RA1-RA3,RA9 on Main Board
# 13449150MF HTJ-064-12D PHONE JACK (STEREO) JK3 on Main Board # F5419704 CRN34102J RESISTOR ARRAY RA6,RA8 on Main Board
# 13449155MF HTJ-064-12I PHONE JACK (MONO) JK4,JK5,JK7-JK9 on Main Board # F5419705 CRN34103J RESISTOR ARRAY RA5,RA7 on Main Board
13429825 YKF51-5054 2PZ MIDI CONNECTOR JK2 on Main Board # F5419706 CRN34104J RESISTOR ARRAY RA4,RA10 on Main Board
# F5419708 CRN34331J RESISTOR ARRAY RA11 on Main Board
DISPLAY UNIT 15399389 RPC10T 471J Y10W MTL, FILM RESISTOR R62 on Main Board
# F5029404 WD-C1602R-2BLYC LCD
POTENTIOMETER
POWER SUPPLY UNIT # 01676523 RK09K12A0 10KA X2 POTENTIOMETER VR1 on Main Board
00905234 ECP01-5A EURO CONVERTER PLUG 01016167 RK11K1140(10K SP B) 10KX1 POTENTIOMETER VR1 on SW Board
PWB ASSY CAPACITOR
# 71235078 MAIN BOARD ASSY 01128045 ERZVA7V330 CAPACITOR (VARICAP) C201 on Main Board
# 71235089 SW BOARD ASSY SW BD1+SW BD2+SW BD3+EXP BRD
INDUCTOR, COIL, FILTER
IC 12449396 BLM31A601SPT EMI FILTER L3,L4 on Main Board
# 01780112 AK4522VF IC (AD/DA) IC12,IC14 on Main Board 12449452 BLM41A800SPT EMI FILTER L5 on Main Board
# 01676501 HD6413006FP IC (CPU) IC1 on Main Board 13529246 DSS310-91D223S EMI FILTER L1,L2 on Main Board
15289123 M51953AFP-600C IC (RESET) IC4 on Main Board
4
GT-3 Feb. 1999
CRYSTAL, RESONATOR # G2217708 PEDAL LABEL(4) for PEDAL SW ASSY
00894023 MA-406 20MHZ TE24 CRYSTAL X1 on Main Board # G2217710 PEDAL LABEL(CTL) for PEDAL SW ASSY
01453167 SG-8002DC 67.7376MHZ CRYSTAL XT1 on Main Board # G2217709 PEDAL LABEL(DOWN) for PEDAL SW ASSY
# G2217711 PEDAL LABEL(UP) for PEDAL SW ASSY
ENCODER # G2147117 PIN STAY for VR PEDAL ASSY