Roland Boss GT-10 Operating and maintenance manual

SERVICE NOTES
Issued by RJA
Copyright © 2008 Roland Corporation
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of Roland Cororation.
Printed in Japan (0290) (CC-KWS)17058541E0
Mar. 2008 GT-10
Preliminary
Table of Contents
Cautionary Notes ..............................................................2
Main Specifications ...........................................................3
Location of Controls .........................................................4
Location of Controls Parts List........................................5
Exploded View ..................................................................6
Exploded View Parts List.................................................8
Important Notes When Disassembling..........................9
Wiring Diagram Parts List.............................................10
Parts List ...........................................................................12
Verifying the Version Number......................................15
Saving and Loading Data...............................................15
Performing a Factory Reset............................................15
Updating the System ......................................................15
Test Mode.........................................................................16
Circuit Board (Main Board) ...........................................24
Circuit Diagram (Main Board: 1/5)..............................26
Circuit Diagram (Main Board: 2/5)..............................28
Circuit Diagram (Main Board: 3/5)..............................30
Circuit Diagram (Main Board: 4/5)..............................32
Circuit Diagram (Main Board: 5/5)..............................34
Circuit Board (SW VR, Pedal, Bank, ENC,
EXP Board) .......................................................................36
Circuit Diagram (SW VR Board)...................................38
Circuit Diagram (Pedal Board)......................................40
Circuit Diagram (Bank Board).......................................42
Circuit Diagram (ENC Board) .......................................42
Circuit Diagram (EXP Board) ........................................43
Determination of Main Board Model ...........................43

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Mar. 2008 GT-10
Cautionary Notes
Before beginning the procedure, please read
through this document. The matters described may
differ according to the model.
Back Up User Data!
User data may be lost during the course of the procedure. Refer to “Saving
and Loading Data” (p. 15) in the Service Notes and save the data. After
completing the procedure, restore the backed-up data to the product.
Important Notes on Disassembly
When disassembling, first check and verify the disassembly procedures, then
carry out actual disassembly operations. Be especially careful to ensure that
the following parts are not lost.
• Jack Bushing (#G2257327R0)
• Insulating Washer 14.5X9.2 (#G2637118R0)
• USB Connector Cap (USBC-1) (#05015034)
Parts List
A component whose part code is ******** cannot be supplied as a service part
because one of the following reasons applies.
• Because it is supplied as an assembled part (under a different part code).
• Because a number of circuit boards are grouped together and supplied as
a single circuit board (under a different part code).
• Because supply is prohibited due to copyright restrictions.
• Because reissuance is restricted.
• Because the part is made to order (at current market price).
Circuit Diagram
In the circuit diagram, “NIU” is an abbreviation for “Not in Use,” and
“UnPop” is an abbreviation for “Unpopulated.” They both mean non-mounted
components. The circuit board and circuit board diagram show silk-screened
indications, but no components are mounted.

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Mar. 2008 GT-10
Main Specifications
GT-10: Guitar Effects Processor
AD Conversion
24-bit + AF method (*)
DA Conversion
24-bit
Sampling Frequency
44.1 kHz
Program Memories
400: 200 (user) + 200 (preset)
Nominal Input Level
INPUT: -10 dBu
RETURN: -10 dBu
Input Impedance
INPUT: 1 M ohm
RETURN: 220 k ohms
Nominal Output Level
OUTPUT: -10 dBu/+4 dBu
SEND: -10 dBu
Output Impedance
OUTPUT: 2 k ohms
SEND: 3 k ohms
Dynamic Range
100 dB or greater (IHF-A)
Digital Output
Coaxial type (conforms to IEC60958)
Display
132 x 64 dots graphic LCD (backlit LCD)
7 segments, 3 characters LED
Connectors
INPUT jack (1/4 inch phone type)
OUTPUT jacks L/MONO, R (1/4 inch phone type)
PHONES jack (Stereo 1/4 inch phone type)
EXT LOOP jacks SEND, RETURN (1/4 inch phone type)
AMP CONTROL jack (1/4 inch phone type)
EXP PEDAL 2/CTL3,4 jack (1/4 inch TRS phone type)
USB connector
DIGITAL OUT jack (coaxial type)
MIDI connectors IN, OUT
DC IN jack
Power Supply
DC 9 V (AC Adaptor: Roland PSB-1U)
Current Draw
800 mA
Dimensions
542 (W) x 272 (D) x 77 (H) mm
21-3/8 (W) x 10-3/4 (D) x 3-1/16 (H) inches
Maximum height:
542 (W) x 272 (D) x 104 (H) mm
21-3/8 (W) x 10-3/4 (D) x 4-1/8 (H) inches
Weight
4.9 kg / 10 lbs 13 oz (excluding AC Adaptor)
Accessories
AC Adaptor (Roland PSB-1U)(#04236101)
Power Code for 120V (#02562456)
for 230V (#01903356)
for 240VA (#03785590)
Euro Converter Plug (#00905234)
Owner’s Manual English (#G6027126R0)
Roland Service (Information Sheet)(#********)
Options
Foot switch: BOSS FS-5U
Dual Foot switch: BOSS FS-6
Expression Pedal: BOSS FV-500L/500H, Roland EV-5
Foot switch Cable: Roland PCS-31(1/4 inch Phone plug (stereo) - 1/4 inch
Phone plug (mono) x2)
* 0 dBu = 0.775 Vrms
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.
*AF method (Adaptive Focus method)
This is a proprietary method from Roland & BOSS that vastly improves the
signal-to-noise (S/N) ratio of the A/D and D/A converters.

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Mar. 2008 GT-10
Location of Controls
fig.panel-GT-10.eps

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Mar. 2008 GT-10
Location of Controls Parts List
Parts
Screw
No. Part Code Part Name Description Q’ty
1 F3229203R0 ROTARY POTENTIOMETER RD901F-40-15F-B10K-0068 1
2 G2477526R0 R-KNOB INDEX 1
3 G2527521R0 PANEL 1
4 F5229817R0 8SEG LED A-553SR-A B/W 1
5 G2567171R0 DISPLAY COVER 1
6 F5229821R0 LCD UNIT W/WIRING KMC13264-H-00-SPF 1
7 F5229820R0 LED (RED) L-7104SRT 11
8 F5229818R0 LED (GREEN) L-7104SGT 2
9 01780101 TACT SWITCH SKQKABD010 24
10 G2477528R0 CURSOR KEY A 1
11 01905467 ROTARY ENCODER EVE GC1 F20 24B 1
12 G2477524R0 ENCODER-KNOB LF 1
13 G2477527R0 CURSOR KEY B 1
14 G2497020R0 KEYTOP UNIT 1
15 G2199526R0 LED SPACER LEDS-2.5(B) 3
16 G2027952R0 TOP COVER 1
17 G2187917R0 VR PEDAL 1
18 G2357313R0 VR PEDAL PLATE M 1
19 G2357314R0 VR PEDAL PLATE S 1
20 G2527523R0 LABEL (1) 1
21 G2217797R0 LABEL (2) 1
22 G2217796R0 LABEL (3) 1
23 G2217795R0 LABEL (4) 1
24 G2217794R0 LABEL (CTL 1) 1
25 G2217791R0 LABEL (CTL 2) 1
26 G2217792R0 LABEL (BANK DOWN) 1
27 G2217793R0 LABEL (BANK UP) 1
28 G2497022R0 SW ESCUTCHEON 8
29 03344723 TACT SWITCH SKQKAKD010 8
30 G2187916R0 SW PEDAL 8
31 G2199527R0 LED SPACER LEDS-10.5 8
32 F3229187R0 POTENTIOMETER RV112FF-40B1-15F-0B20K-0057 4
33 G2477525R0 R-KNOB 4
34 G2497021R0 KEYTOP UNIT S 1
35 F5229819R0 LED(RED) L-7104SURC-E 10
36 G2147913R0 LED SPACER 2
37 G2497019R0 KEYTOP CLEAR-5H 2
38 G2207422R0 GURD ESCT 1
39 G2237632R0 GUARD PLATE 1
40 03239801 6.5MM JACK HTJ-064-12I 6
41 04909467 6.5MM JACK(PHONES) HTJ-064-05A 1
42 03344701 6.5MM JACK HTJ-064-12DS 1
43 02781101 USB CONNECTOR YKF45-0020N 1
44 05015034 USB CONNECTOR CAP USBC-1 1
45 01343723 RCA(PIN) JACK YKC21-3117(ORANGE) 1
46 13429825 MIDI CONNECTOR YKF51-5054V 1
47 F3129307R0 SWITCH SDKLA1-B 1
48 12499175 BUTTON JSPUE0011A 1
49 04908701 ADAPTOR JACK KM02018ABM1P 1
50 G2147127R0 DC JACK HOLDER 1
51 22365714 CORD HOOK 1
52 G2357120R0 FOOT H=5 5
53 G2207423R0 BOTTOM COVER 1
No. Part Code Part Name Description Q’ty
a H5039521R0 NUT M7 5
b H5039126 M9 WASHER 1
c H5039520R0 NUT M9 1
d H5049003R0 SCREW M4X4 NI 5
e H5049004R0 SCREW M3X10.5 NI 5
f H5039158R0 WASHER M9X14X0.5T NI 6
g H5039510R0 NUT M9X12X2T NI 7
h G2257327R0 JACK BUSH 1
i G2637118R0 INSULATING WASHER 14.5X9.2 1
j 40563989 SCREW 4X8 TAPTITE S BINDING NI 1
k 40342712 SCREW M3X6 PAN MACHINE W/SW+SMALL PW BZC 1
l 40011312 SCREW 3X8 BINDING TAPTITE P BZC 3
m 40019123 SCREW 3X8 BINDING TAPTITE S BZC 2

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Mar. 2008 GT-10
Exploded View
fig.bunkai.eps@L

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Mar. 2008 GT-10
fig.bunkai.eps@R

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Mar. 2008 GT-10
Exploded View Parts List
Parts
No. Part Code Part Name Description Q’ty
1 G2027952R0 TOP COVER 1
2 G2207423R0 BOTTOM COVER 1
3 G2237632R0 GUARD PLATE 1
4 G2207422R0 GUARD ESCT 1
5 G2567171R0 DISPLAY COVER 1
6 G2527521R0 PANEL 1
13 G2637107R0 RUBBER SW 1
16 G2147806R0 STAY (POM) 1
18 G2257331R0 INSULATING SHEET 1
19 G2497021R0 KEYTOP UNIT S 1
20 G2497019R0 KEYTOP CLEAR-5H 2
21 G2497020R0 KEYTOP UNIT 1
22 G2477525R0 R-KNOB 4
23 G2477526R0 R-KNOB INDEX 1
24 G2477524R0 ENCODER-KNOB LF 1
25 G2477528R0 CURSOR KEY A 1
26 G2477527R0 CURSOR KEY B 1
27 22365714 CORD HOOK 1
14 G2567121 RUBBER SW ESCUTCHEON 1
32 G2527523R0 LABEL (1) 1
33 G2217797R0 LABEL (2) 1
34 G2217796R0 LABEL (3) 1
35 G2217795R0 LABEL (4) 1
36 G2217794R0 LABEL (CTL 1) 1
37 G2217791R0 LABEL (CTL 2) 1
38 G2217792R0 LABEL (BANK DOWN) 1
39 G2217793R0 LABEL (BANK UP) 1
40 G2357120R0 FOOT H=5 5
41 F5229821R0 LCD UNIT W/WIRING KMC13264-H-00-SPF 1
42 12499175 1
43 05015034 USB CONNECTOR CAP USBC-1 1
44 G2147913R0 LED SPACER 2
45 G2257327R0 JACK BUSH 1
46 G2637118R0 INSULATING WASHER 14.5X9.2 1
47 75D732B0R1 VR PEDAL UNIT 1
* This unit includes the following parts.
7G2187917R0 VR PEDAL 1
8G2357313R0 VR PEDAL PLATE M 1
9G2357314R0 VR PEDAL PLATE S 1
10 G2357111R0 CUSHION R 1
11 G2147874R0 BOLT HOLDER 2
12 G2147898R0 BOLT HOLDER 2
15 G2147909R0 PEDAL HOLDER 1
17 G2147897R0 SHAFT STAY 1
hH5019115R0 SCREW 3X8 PAN TAPPING B1 BZC 2
mH5069003R0 BOLT HEX M6X67 1
nH5069004R0 U-NUT M6 NI 1
qH5039707R0 WASHER M6 T1NI 1
48 75D732S0R0 SW PEDAL UNIT
* This unit includes the following parts.
31 G2497022R0 SW ESCUTCHEON 8
28 G2187916R0 SW PEDAL 8
29 G2177103R0 SUPPORT SPRING 8
30 G2357109R0 PEDAL FOOT 8
49 75D733M0R0 MAIN BOARD ASSY 1
50 75D733S0R0 SW SHEET ASSY 1
51 75D733S0R0 SW SHEET ASSY 1
52 75D733S0R0 SW SHEET ASSY 1
53 75D733S0R0 SW SHEET ASSY 1
54 75D733S0R0 SW SHEET ASSY 1
56 75D733S0R0 SW SHEET ASSY 1

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Mar. 2008 GT-10
Screw
Important Notes When Disassembling
Guard Against Lost Parts
When disassembling, first check and verify the disassembly procedures, then
carry out actual disassembly operations. Be especially careful to ensure that
the following parts are not lost.
• Jack Bushing (#G2257327R0)
• Insulating Washer 14.5X9.2 (#G2637118R0)
• USB Connector Cap (USBC-1) (#05015034)
Components Mounted on the SW VR
Board
When replacing the LED spacer (#G2147913R0) or keytop unit (#G2497020R0)
on the SW VR Board, first detach LED1 or LED2 and LED3 shown in the
Exploded View (p. 6), then carry out the replacement.
* When mounting the LEDs, be careful to orient the parts correctly.
Modifying the Wiring
The length of the following ribbon cables differs depending on the production
period. If the length is too long, modify the cable as shown below.
• 3-pin ribbon cable between SW VR Board CN105 and ENC (encoder)
Board CN501 (Ain the figure below)
• 9-pin ribbon cable between Pedal Board CN202 and Bank Board CN301
(Bin the figure below)
fig.wiring-set1.eps
Tape Application
After installing the SW VR Board, use Filament Tape #898 (#40122645) to
secure the 2-pin wiring from the LCD unit to the Insulating Sheet
(#G2257331R0) as shown in the figure below.
fig.tape.eps
No. Part Code Part Name Description Q’ty
a H5049003R0 SCREW M4X4 NI 5
b H5049004R0 SCREW M3X10.5 NI 5
c 40563989 SCREW 4X8 TAPTITE S BINDING NI 1
d 40019123 SCREW 3X8 BINDING TAPTITE S BZC 7
e 40011278 SCREW 3X8 BINDING TAPTITE P FE ZC 28
f 40017934 SCREW M3X6 PAN MACHINE W/SW+PW(L) FE ZC 8
g 40342712 SCREW M3X6 PAN MACHINE W/SW+SMALL PW BZC 12
j 40011312 SCREW 3X8 BINDING TAPTITE P BZC 3
r H5039521R0 NUT M7 5
s H5039510R0 NUT M9X12X2T NI 7
t H5039158R0 WASHER M9X14X0.5T NI 6
u H5039520R0 NUT M9 2
v H5039126 M9 WASHER 2

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Mar. 2008 GT-10
Wiring Diagram Parts List
fig.block-wiring.eps@L
* LCD KMC13264-H-00-SPF (#F5229821R0) includes the following LCD UNIT (LCD FPC, BACKLIGHT WIRING.)
No. Part Code Part Name Description Q’ty
W1 F3417194R0 WIRING EXP 3PIN 1
W2 F3417195R0 RIBBON CABLE ENC 3PIN 1
W3 F3417196R0 WIRING SW 12PIN 1
W4 F3417197R0 WIRING AD 7PIN 1
W5 F3417198R0 WIRING LED 11PIN 1
W6 F3417199R0 WIRING PEDAL 13PIN 1
W7 F3477081R0 RIBBON CABLE PEDAL 9PIN 1