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

5
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

6
Mar. 2008 GT-10
Exploded View
fig.bunkai.eps@L

7
Mar. 2008 GT-10
fig.bunkai.eps@R

8
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

9
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

11
Mar. 2008 GT-10
fig.block-wiring.eps@R

12
Mar. 2008 GT-10
Parts List
fig.-part1-e.eps
SAFETY PRECAUTIONS:
The parts marked have
safety-related characteristics. Use
only listed parts for replacement.
NOTE: The parts marked # are new. (initial parts)
Due to one or more of the following reasons,
parts with parts code ******** cannot be supplied as service parts.
• Part supplied only as a component in a complete assembly
• Copyright does not permit the part to be supplied
• Part is sold commercially
The description "Q'TY" means a necessary number of the parts per one product.
CASING
G2207423R0 BOTTOM COVER 1
G2567171R0 DISPLAY COVER 1
# G2527521R0 PANEL 1
G2147909R0 PEDAL HOLDER 1
G2497022R0 SW ESCUTCHEON 8
G2187916R0 SW PEDAL 8
75D732S0R0 SW PEDAL UNIT 8
# G2027952R0 TOP COVER 1
G2187917R0 VR PEDAL 1
G2357313R0 VR PEDAL PLATE M 1
G2357314R0 VR PEDAL PLATE S 1
75D732B0R1 VR PEDAL UNIT 1
G2147874R0 BOLT HOLDER 2
G2147897R0 SHAFT STAY 1
G2147898R0 BOLT HOLDER 2
G2177103R0 SUPPORT SPRING 8
G2357120R0 FOOT H=5 5
G2357111R0 CUSHION R 1
G2357109R0 PEDAL FOOT 8
G2567121 RUBBER SW ESCUTCHEON 1
KNOB, BUTTON
G2477526R0 R-KNOB INDEX OUTPUT LEVEL Knob 1
G2497019R0 KEYTOP CLEAR-5H SW VR Board 2
G2477528R0 CURSOR KEY A SW VR Board 1
G2477527R0 CURSOR KEY B SW VR Board 1
G2477524R0 ENCODER-KNOB LF 1
G2497020R0 KEYTOP UNIT SW VR Board 1
G2497021R0 KEYTOP UNIT S SW VR Board 1
G2477525R0 R-KNOB PARAMERTER Knob 4
12499175 BUTTON JSPUE0011A 1
SWITCH
F3129307R0 SWITCH SDKLA1-B 1
03344723 TACT SWITCH SKQKAKD010 SW201, SW202, SW203, SW204, SW205,
SW206 on Pedal Board,
SW301, SW302 on Bank Board
8
01780101 TACT SWITCH SKQKABD010 SW101, SW102, SW103, SW104, SW105,
SW106, SW107, SW108, SW109, SW110,
SW111, SW112, SW113, SW114, SW115,
SW116, SW117, SW118, SW119, SW120,
SW121, SW122, SW123, SW124 on SW VR
Board
24
JACK, SOCKET
02781101 USB CONNECTOR YKF45-0020N JK 1 on Main Board 1
03344701 6.5MM JACK HTJ-064-12DS JK12 on Main Board 1
03239801 6.5MM JACK HTJ-064-12I JK4, JK5, JK7, JK8, JK9, JK10, JK14 on Main
Board
6
01343723 RCA(PIN) JACK YKC21-3117(ORANGE) JK2 on Main Board 1
13429825 MIDI CONNECTOR YKF51-5054V JK3 on Main Board 1
DISPLAY UNIT
F5229821R0 LCD UNIT W/WIRING KMC13264-H-00-SPF 1
F5229817R0 8SEG LED A-553SR-A B/W LED112 on SW VR Board 1
PWB ASSY
# 75D733M0R0 MAIN BOARD ASSY 1
# 75D733S0R0 SW SHEET ASSY 1

13
Mar. 2008 GT-10
IC
02453056 IC (LED DRIVER) BU2090FS-E2 IC102 on SW VR Board 4
F5209167 IC (TTL) 74HC4052D IC101 on SW VR Board 1
DIODE
F5229818R0 LED (GREEN) L-7104SGT LED113 on SW VR Board, LED305 on Bank
Board
2
F5229819R0 LED (RED) L-7104SURC-E LED101, LED102, LED103, LED104,
LED106, LED107, LED108, LED109,
LED110, LED111 on SW VR Board
10
F5229820R0 LED (RED) L-7104SRT LED105 on SW VR Board,
LED201, LED202, LED203, LED204,
LED205, LED206 on Pedal Board,
LED301, LED302, LED303, LED304 on Bank
Board
11
15019126 SWITCHING DIODE 1SS133 T-77 D101, D102, D103, D104, D105, D106, D107,
D108, D109, D110, D111, D112, D113, D114,
D115, D116, D117, D118, D119, D120, D121,
D122, D123, D124 on SW VR Board,
D201, D202, D203, D204, D205, D206 on
Pedal Board,
D301, D302 on Bank Board
32
RESISTOR
13749773T0 CARBON RESISTOR SR25TRE 101 J R101, R102, R103, R104, R105, R106, R107,
R108, R109, R110, R111, R112, R113, R114,
R115, R116, R117, R118, R119, R120, R121,
R122, R123, R124, R125, R126, R127, R128,
R129, R130, R131, R132, R133, R134, R135 on
SW VR Board,
R201, R202, R203, R204, R205, R206 on Pedal
Board,
R301, R302, R303, R304 on Bank Board
45
13749769T0 CARBON RESISTOR SR25TRE 680 J R136 on SW VR Board, R305 on Bank Board 2
POTENTIOMETER
F3279782R0 POTENTIOMETER RK11K1140(10K SPECIAL B-
CURVE)
VR401 on EXP Board 1
# F3229187R0 POTENTIOMETER RV112FF-40B1-15F-0B20K-0057 VR102, VR103, VR104, VR105 on SW VR
Board
4
# F3229203R0 ROTARY POTENTIOMETER RD901F-40-15F-B10K-0068 VR101 on SW VR Board 1
CAPACITOR
# F3639959R0 CHEMICAL CAPACITOR SVP220M1CD05M C109, C112, C116, C117, C118, C119, C121,
C124 on SW VR Board
8
03125023 CERAMIC CAPACITOR RPER11H103K2M1A01A C101, C102, C103, C104, C105, C106, C107,
C108, C110 on SW VR Board
9
13529132 CERAMIC CAPACITOR RPEF11H104Z2M1A01A C111, C113, C114, C115, C120, C122, C123
on SW VR Board,
C201, C204 on Pedal Board
9
ENCODER
01905467 ROTARY ENCODER EVE GC1 F20 24B EN501 on ENC 1
CONNECTOR
F3439890R0 CONNECTOR A2001WR2-3P CN4 on Main Board 1
F3439891R0 CONNECTOR A2001WR2-2P CN8 on Main Board 1
F3439179 CONNECTOR 7P A2001WR2-7P CN7 on Main Board 1
F3439231 CONNECTOR 12P A2001WR2-12P CN2 on Main Board 1
F3439232 CONNECTOR 13P A2001WR2-13P CN102 on SW VR Board 1
F3439166 CONNECTOR A2001WR2-11P CN6 on Main Board 1
# 04901667 CONNECTOR 52559-2852 CN1 on Main Board 1
04908701 ADAPTOR JACK KM02018ABM1P JK10 on Main Board 1
04909467 6.5MM JACK (PHONES) HTJ-064-05A JK6 on Main Board 1
WIRING, CABLE
F3417194R0 WIRING EXP 3PIN CN401 on EXP Board 1
F3417198R0 WIRING LED 11PIN CN103 on SW VR Board 1
F3417196R0 WIRING SW 12PIN CN104 on SW VR Board 1
F3417199R0 WIRING PEDAL 13PIN CN201 on Pedal Board 1
F3417197R0 WIRING AD 7PIN CN101 on SW VR Board 1
F3417195R0 RIBBON CABLE ENC 3PIN CN105 on SW VR Board,
CN501 on EXP Board
2
F3477081R0 RIBBON CABLE PEDAL 9PIN CN202 on Pedal Board,
CN301 on Bank Board
2

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Mar. 2008 GT-10
SCREWS
H5039707R0 WASHER M6 T1NI 1
H5069004R0 U-NUT M6 NI 1
H5039520R0 NUT M9 2
G2637118R0 INSULATING WASHER 14.5X9.2 1
H5069003R0 BOLT HEX M6X67 1
H5039521R0 NUT M7 5
H5039510R0 NUT M9X12X2T NI 7
H5039158R0 WASHER M9X14X0.5T NI 6
H5019115R0 SCREW 3X8 PAN TAPPING B1 BZC 2
# H5049003R0 SCREW M4X4 NI 5
# H5049004R0 SCREW M3X10.5 NI 5
H5039126 M9 WASHER 2
40563989 SCREW 4X8 TAPTITE S BINDING NI 1
40342712 SCREW M3X6 PAN MACHINE W/
SW+SMALL PW BZC
12
40017934 SCREW M3X6 PAN MACHINE W/SW+PW(L)
FE ZC
8
40019123 SCREW 3X8 BINDING TAPTITE S BZC 7
40011312 SCREW 3X8 BINDING TAPTITE P BZC 3
40011278 SCREW 3X8 BINDING TAPTITE P FE ZC 28
PACKING
# G2627792R0 PACKING CASE 1
G2267643R0 PAD L 1
G2267642R0 PAD R 1
# G2617330R0 OUTER PACKING CASE -
MISCELLANEOUS
G2527523R0 LABEL (1) 1
G2217797R0 LABEL (2) 1
G2217796R0 LABEL (3) 1
G2217795R0 LABEL (4) 1
G2217793R0 LABEL (BANK UP) 1
G2217792R0 LABEL (BANK DOWN) 1
G2217794R0 LABEL (CTL 1) 1
G2217791R0 LABEL (CTL 2) 1
05015034 USB CONNECTOR CAP USBC-1 1
22365714 CORD HOOK 1
G2237632R0 GUARD PLATE 1
G2207422R0 GUARD ESCT 1
G2257331R0 INSULATING SHEET 1
G2257332R0 JACK COVER L MK1, MK3 on Main Board 2
G2147913R0 LED SPACER on SW VR Board 2
G2147127R0 DC JACK HOLDER MK2 on Main Board 1
G2147806R0 STAY (POM) 1
G2637107R0 RUBBER SW 1
# G2199527R0 LED SPACER LEDS-10.5 LED201, LED202, LED203, LED204,
LED205, LED206 on Pedal Board,
LED301, LED304 on Bank Board
8
# G2199526R0 LED SPACER LEDS-2.5(B) LED302, LED303, LED305 on Bank Board 3
# G2257327R0 JACK BUSH 1
40122645 FILAMENT TAPE #898 F6019011 -
ACCESSORIES (Standard)
# G6017472R0 OWNER’S MANUAL JAPANESE 1
# G6027126R0 OWNER’S MANUAL ENGLISH 1
# G6017476R0 LEAFLET PATCH LIST (COPY) JAPANESE 1
# G6027130R0 LEAFLET PATCH LIST (COPY) ENGLISH 1
40232389 WARRANTY CARD FOR BOSS JAPAN ONLY 1
01903334 AC CORD SET PSE 100V 1.0M FOR PSB-1U 1
02562456 AC CORD SET 120V 1.0M (NON POLAR) 1
01903356 AC CORD SET 230V 1.0M FOR PSB 1
03785590 AC CORD SET SC-078-NA05 240VA 1
04236101 AC ADAPTOR WITHOUT AC
CORD
PSB-1U(S) UNIVERSAL 1
00905234 EURO CONVERTER PLUG ECP01-5A 1

15
Mar. 2008 GT-10
Verifying the Version
Number
Start up in the Test Mode.
1. Hold down [OUTPUT SELECT] and [SYSTEM] and switch on the power.
* Continue holding down these buttons until 1: VERSION is displayed on the
screen.
2. Press [CATEGORY/ENTER].
The version number (*.** in the figure) and the checksum values (#### in
the figure) appear on the screen.
fig.version-GT10.eps
TOTAL SUM: The total of the following three items
PROGRAM SUM: The unit’s main program
USER SUM: User data
BOOT: The boot program
Unless instructed otherwise, for the checksum, verify the PROGRAM
SUM value.
Saving and Loading Data
To save user data, you use the bulk dump feature to perform a batch send to
an external MIDI device (such as computer sequencer connected via MIDI).
Similarly, to load user data back into the unit, you use the bulk load feature to
perform a batch receive from the external MIDI device.
The setting for PEDAL CALIBRATION at the SYSTEM MENU (or the pedal-
calibration setting in 7. INT EXP (p. 18) in the Test Mode) is not saved.
Sending Parameters to an
External MIDI Device (Bulk Dump)
1. Connect the GT-10 to the external MIDI device using MIDI.
2. Put the external MIDI device in standby for receiving MIDI Exclusive
(SysEx) data.
3. Press [SYSTEM].
4. Move the cursor to MIDI and press [CATEGORY/ENTER].
fig.bulkdmp1.eps
5. Move the cursor to B.DUMP and press [CATEGORY/ENTER].
fig.bulkdmp2.eps
6. Use System ~ Temp to select the items to send.
fig.bulkdmp3.eps
7. Press [CATEGORY/ENTER].
Sending starts. You can cancel this by pressing [EXIT].
Receiving Parameters from an
External Device (Bulk Load)
1. Connect the GT-10 to the external MIDI device using MIDI.
2. Send bulk data from the external MIDI device.
The message BULK DATA RECEIVING... is displayed while data is
being received.
* No operation on the GT-10 is needed.
* If data is not received, verify that the device ID of the GT-10 is the same as the
ID setting used when the bulk dump was carried out.
Performing a Factory Reset
1. With the power off, hold down [CATEGORY/ENTER] and [ ] and
switch on the power.
The message Force Factory Reset! is displayed on the screen.
2. Press [WRITE].
The message Now initializing... appears on the screen, and when the
displayed value reaches 100%, the Play mode screen appears.
3. Switch off the power.
Performing this Factory Reset initializes the system data and user data to the
factory defaults. Use a Sending Parameters to an External MIDI Device
(Bulk Dump) (p. 15) beforehand to save the data.
When you want to initialize only the system data, go to “Chapter 5 -- Making
Global Settings” in the owner’s manual and refer to the section entitled
“Restoring the Factory Settings (Factory Reset).”
Updating the System
You carry out updates of the system by using a computer or the like to play
back update-use MIDI data and receiving this data on the GT-10.
1. Using a UM-1 USB-MIDI interface or the like, connect MIDI OUT on the
computer to MIDI IN on the GT-10.
2. Hold down [CH SELECT], [DISPLAY MODE], and [WRITE] and switch
on the power.
3. The message SYSTEM UPDATER is displayed.
4. Wait several seconds until the message Waiting SMF... is displayed.
5. On the computer, start the program for sending MIDI data (such as
UpdSMF) and send the update-use MIDI data.
The message Now Receiving... is displayed while the data is being
received.
* The update takes around 20 minutes.
When the update finishes, the message Completed is displayed.
* Refer also to the documentation provided with distribution of the system update
file.

16
Mar. 2008 GT-10
System Update Error Messages
If the update fails, a message like the ones shown below is displayed.
Check Sum Error
A problem was found in the checksum value for the received Standard MIDI
file (SMF).
Receive Error
The received SMF may have a problem, the MIDI transmission may have been
interrupted, or the MIDI cable may be disconnected or have a broken wire.
Flash Write Error
Writing to the flash ROM failed. The peripheral circuitry for the flash ROM
may be defective, or the MIDI cable may be disconnected or have a broken
wire.
Also, if two asterisks (“*”) are displayed while data is being received, it means
that receipt of MIDI data has failed.
* Stopping partway through and resending also causes two asterisks to be
displayed, but this does not signify a problem.
Test Mode
Items Required
• Expression pedal (Roland EV-5) x 1
• MIDI cable x 1
• USB cable x 1
• Cable with a 1/4-inch phone plug x 1 (having a 33-ohm resistor [1/4 W
or more] connected between L channel and ground and between R
channel and ground)
• DIGITAL IN-compatible device x 1 (device that converts digital audio
signal to analog audio signals: Roland DA-400 or the like)
• Digital audio cable (coaxial) x 1
• Computer x 1
• Headphones x 1 set
• Oscilloscope x 1
• Monitor speaker x 2
• Noise meter x 1
• Tester x 1
• 47-k ohm plug x 1 (having a 47-k ohm resistor connected between the
signal line and ground, and having a metal cover [shielding] over the
area where the resistor is mounted)
• Dummy plug x 1 (open plug)
• Push/pull force gauge (capable of measurement from 100 g to 1 kg and
from 10 kg to 50 kg)
• Cable for measurement of DC IN current consumption
fig.check-cable.eps
* Before starting, on the computer, install and set up the folder containing the
dedicated USB driver for the GT-10 (GT-10 USB Driver) and the dedicated USB
checking software for the GT-10 (USBCheck.exe, the DLL, the settings file, and
the like). The GT-10 USB Driver and USBCheck.exe are obtained via Service
Network. USBCheck.exe runs only under Windows XP.
Entering the Test Mode/Selecting Test
Items
1. Hold down [OUTPUT SELECT] and [SYSTEM] and switch on the power.
* Continue holding down the buttons until a screen like the one shown below
appears.
fig.1version.eps
2. Turn the dial to select the test item, then press [CATEGORY/ENTER].
Test Items
Quitting the Test Mode
Switch off the power.
Test items in the Test Mode
Screen display Test description Page where
described
1. VERSION Version Verification p. 17
2. DEVICE Testing of the Peripheral ICs for
the CPU and for the DSP p. 17
3. LCD/ENC
Testing Covering LCD Contrast,
Missing LCD Dots, and Encoder
Operation
p. 17
4. SW/LED Testing of Operation Switches
and LEDs p. 18
5. OUTPUT LEV Testing of the OUTPUT Control p. 18
6. PARAM KNOB Testing of the PARAMETER Con-
trols p. 18
7. INT EXP Testing of the Expression Pedal
and Pedal-calibration Settings p. 18
8. EXT EXP Testing of the External Pedal Jack p. 19
9. MIDI MIDI Test p. 19
10. AMP CTRL Testing of the AMP CONTROL
Jack p. 19
11. USB&D.OUT Testing of the USB Circuitry and
DIGITAL OUT Circuitry p. 19
12. OUTPUT&MUTE
Testing of SEND, PHONES, OUT-
PUT L/R, the MUTE Circuitry for
each output, and the OUTPUT -
10/+4 dB Switching Circuitry
p. 20
13. INPUT Testing of the INPUT Circuitry p. 21
14. RETURN Testing of the RETURN Circuitry
and the RETURN Jack Switch p. 22
15. INPUT NOISE Testing of Residual Noise and
Shock at the Respective Outputs p. 22
16. LOOP NOISE Testing of the SEND/RETURN
Connection and RETURN Shock p. 22
17. FACT RESET Factory Reset p. 22
Test items outside the Test Mode
Test name Test description Page where
described
Short check Testing of AMP CTRL Insulation p. 22
EXP pedal operation-
load test
Testing of Load at Which Move-
ment of the Expression Pedal
Starts
p. 23
Muting and Play
Mode test
Testing of Muting Circuitry and
Verification of Product Startup p. 23
Current-consump-
tion Test
Verification of Current-consump-
tion Value for DC IN p. 23

17
Mar. 2008 GT-10
0. Starting the Test Mode
1. Hold down [OUTPUT SELECT] and [SYSTEM] and switch on the power.
* Continue holding down these buttons until a screen like the one shown below
appears.
fig.1version.eps
2. Verify that all LEDs light up.
3. Verify that the color of the LEDs is correct.
fig.ledall-GT-10.eps
4. Apply impact and verify that the LEDs and LCD screen do not go dark or
disappear.
5. Verify that all 4 backlight LEDs at the bottom of the LCD screen light up.
Example of defective illumination of the LEDs for the LCD-screen
backlight
fig.lcd-bl-led.eps
1. VERSION
Version Verification
1. Display 1: VERSION on the screen.
2. Press [CATEGORY/ENTER].
The version number (*.** in the figure) and the checksum values (#### in
the figure) appear on the screen.
fig.version-GT10.eps
TOTAL SUM: The total of the following three items
PROGRAM SUM: The unit’s main program
USER SUM: User data
BOOT: The boot program
Unless instructed otherwise, for the checksum, verify the PROGRAM
SUM value.
3. Press [EXIT].
4. Press [CATEGORY/ENTER] to go back to the test-item selection screen.
2. DEVICE
Testing of the Peripheral ICs for the CPU and for
the DSP
1. Use the dial to choose 2: DEVICE.
2. Press [CATEGORY/ENTER] to display the screen shown below.
fig.2device2.eps
If OK is displayed for all items, execution automatically advances to the
next test.
Descriptions of Errors
PR Check of DSP (IC3) internal program RAM
An error indicates either an internal defect in the DSP (IC3) or a
defective bus connection with the CPU (IC2).
DT Check of DSP (IC3) internal data RAM
An error indicates either an internal defect in the DSP (IC3) or a
defective bus connection with the CPU (IC2).
ER Check of the SDRAM (19) connected to the DSP (IC3)
An error indicates either an internal defect in the SDRAM or a
defective connection between the DSP (IC3) and the SDRAM
(19).
SR Check of the DSP (13) internal sampling-rate converter
An error indicates either an internal defect in the DSP (IC3) or a
defective bus connection with the CPU (IC2).
IN Check of DSP (13) -> CPU (IC2) interrupt operation
An error indicates a defective interrupt connection (IC3 pin 101)
from the DSP (13) to the CPU (IC2).
SYS Check of the user data EEPROM (IC37)
An error indicates either a defect in IC37 or a defective
connection between IC37 and the CPU (IC2).
USB Check of the USB TUSB (IC11) and USB boot data EEPROM
(IC13)
An error indicates either a defect in the TUSB (IC11) or EEPROM
(IC13), or a defective connection between the TUSB (IC11),
EEPROM (IC13), and CPU (IC2).
3. LCD/ENC
Testing Covering LCD Contrast, Missing LCD Dots,
and Encoder Operation
1. Use the dial to choose 3: LCD/ENC.
2. Press [CATEGORY/ENTER] to display the screen shown below.
fig.3lcdenc2.eps
3. Verify that turning the dial counterclockwise makes the contrast
progressively fainter.
4. Verify that turning the dial clockwise makes the contrast progressively
deeper.

18
Mar. 2008 GT-10
5. Press [ ] to display the screen shown below.
fig.3lcdenc3.eps
6. Verify that the LCD screen has no missing dots.
7. Press [ ] to display the screen shown below.
fig.3lcdenc4.eps
8. Verify that the lines on the four sides are unbroken.
9. Press [EXIT] to return to the test-item select screen.
4. SW/LED
Testing of Operation Switches and LEDs
1. Use the dial to choose 4: SW/LED.
2. Press [CATEGORY/ENTER] to display the screen shown below.
fig.4swlcd2e.eps
3. If ########## appears, verify that the corresponding LED is illuminated.
4. Press the button indicated by *******.
* Pressing a wrong button makes the message NG! appear.
5. If ########## appears, verify that the corresponding LED goes dark.
6. Repeat steps 3through 5.
When as the final item the LED for PEDAL 1 goes dark, execution
automatically advances to the next test.
5. OUTPUT LEV
Testing of the OUTPUT Control
fig.5outputlev2.eps
1. Turn the OUTPUT LEVEL control to minimum.
2. Turn the OUTPUT LEVEL control to maximum.
If OK is displayed, execution automatically advances to the next test.
6. PARAM KNOB
Testing of the PARAMETER Controls
fig.6paramknob2.eps
1. Turn the PARAMETER 1 control clockwise by 360 degrees or more.
2. Verify that the these values are displayed: 1/4 -> 2/4 -> 3/4 -> 4/4 -> OK.
3. In the same way, successively turn the PARAMETER 2 through
PARAMETER 4 controls clockwise by 360 degrees or more.
4. Verify that the these values are displayed: 1/4 -> 2/4 -> 3/4 -> 4/4 -> OK.
* Turning too rapidly may cause the correct results to fail to be displayed.
* Turning two or more controls at the same time causes NG (not OK) to be
displayed. Turn one at a time.
If OK is displayed, execution automatically advances to the next test.
7. INT EXP
Testing of the Expression Pedal and Pedal-
calibration Settings
* The CPU A/D value is displayed for identification of defect factors. No special
verification is required during the course of the procedures.
fig.7intexp2.eps
1. Depress the heel of the GT-10’s expression pedal all the way, then press
the [WRITE] button.
2. Verify that OK is displayed.
3. In the same way, depress the toe of the expression pedal all the way, then
press the [WRITE] button.
fig.7intexp3.eps
4. Verify that OK is displayed.
Execution advances to the screen shown below.
fig.7intexp4.eps

19
Mar. 2008 GT-10
5. Apply a load of 25 to 40 kg to the expression pedal at the location in the
figure below.
fig.exp-pedal-sw-e.eps
The expression pedal’s LED lights up.
This LED lights up only when the load to the expression pedal is over the
value for Threshold.
If it fails to light up, operate the dial to adjust the value for Threshold.
(Initial value: 6, variable range: 1through 16)
Smaller values make the expression pedal switch increasingly easier to
actuate, and larger values make the switch progressively more difficult to
actuate.
6. Press the [WRITE] button.
7. Verify that the message Done is displayed.
8. Pressing the [EXIT] button returns the unit to the test-item selection
screen.
* Executing a Factory Reset (17. FACT RESET (p. 22)) in the Test Mode
initializes the Threshold value just described (to a value of 6).
8. EXT EXP
Testing of the External Pedal Jack
1. Use the dial to choose 8: EXT EXP.
2. Pressing [CATEGORY/ENTER] displays the screen shown in the figure
below.
fig.8extexp2.eps
* If no expression pedal is connected, the message Not Connected is displayed.
3. Connect the EV-5 to the EXP PEDAL 2 jack.
* Set the sensitivity control on the EV-5 to 0.
4. Depress the heel of the EV-5 pedal all the way, and verify that MIN = OK
is displayed.
5. Depress the toe of the EV-5 pedal all the way, and verify that MAX = OK
is displayed.
6. When the message Pull out EXP PEDAL. appears, disconnect the plug
for the EV-5.
If OK is displayed, execution automatically advances to the next test.
9. MIDI
MIDI Test
fig.9midi2.eps
* When no MIDI cable is connected, the message No Connection.. is displayed.
1. Connect the MIDI IN and MIDI OUT jacks using a MIDI cable.
2. When the message Pull out the cable. appears, disconnect the plugs for
the MIDI cable.
If OK is displayed, execution automatically advances to the next test.
10. AMP CTRL
Testing of the AMP CONTROL Jack
fig.10ampctrl2.eps
1. Connect the dummy plug to the AMP CONTROL jack.
2. Set the tester to the resistance-measurement mode, and touch the + and -
probes respectively to the signal and ground connectors of the dummy
plug.
3. Verify that the readings on the tester match what is displayed on the LCD
screen as shown below.
4. Press [ ] to advance to the next test.
11. USB&D.OUT
Testing of the USB Circuitry and DIGITAL OUT
Circuitry
fig.11usbdout2.eps
After a short wait, the message No Connection.. is displayed.
1. Connect the left and right audio-output channels of the device capable of
digital input to the monitor speakers and the oscilloscope.
2. Using a digital audio cable, connect the DIGITAL OUT jack on the GT-10
to the DIGITAL IN jack on the device capable of digital input.
3. On the computer, start the dedicated USB checking software for the GT-
10 (USBCheck.exe).
4. Using a USB cable, connect the computer and the USB connector on the
GT-10.
The message CHECK SOUND is displayed on the GT-10’s screen.
The message VENDER is displayed in the USB checking software on the
computer.
* If the message No Connection.. does not disappear, a problem is present in the
computer’s settings, the USB connection, or the USB circuitry in the GT-10.
LCD screen display Tester
OPEN Infinite resistance
SHORT Around 0 ohm

20
Mar. 2008 GT-10
5. Verify that the waveform display on the oscilloscope is like that shown in
the figure below.
fig.11usbdout1.eps
Upper: left channel, lower: right channel
* The output level may vary according to the device capable of digital input.
6. Subject the product to vibration and verify that no noise or other
abnormal sound is heard from the monitor speakers.
7. Press [ ] to advance to the next test.
12. OUTPUT&MUTE
Testing of SEND, PHONES, OUTPUT L/R, the MUTE
Circuitry for each output, and the OUTPUT -10/+4
dB Switching Circuitry
fig.12output&mute2e.eps
SEND Test
1. Using a cable with a 1/4-inch phone plug, connect the SEND jack to
channel 1 on the oscilloscope and the left-channel monitor speaker.
2. Verify that the output waveform display on the oscilloscope is as shown
in the figure below, and that no waveform is displayed while MUTE is
displayed on the screen.
fig.12out-send.eps
3. Verify that the peak value is from 1.25 to 1.35 V.
4. Verify that signals are output from the monitor speakers and no noise or
other abnormal sound is heard, and that no sound is played while MUTE
is displayed on the screen.
PHONES Test
1. Using a cable with a 1/4-inch stereo phone plug (with 33-ohm load
resistor), connect the PHONES jack to channel 1 and channel 2 of the
oscilloscope and to the left-channel and right-channel monitor speakers.
2. Verify that the INSERT PHONES message disappears from the screen.
3. Verify that the output waveform display on the oscilloscope is what is
shown in the figure below, and that no waveform is displayed while
MUTE is displayed on the screen.
fig.12out-phones.eps
Upper: left channel, lower: right channel
4. Verify that the peak value for both the left and right channels is 0.95 to
1.05 V (with 33-ohm load).
5. Verify that signals are output from the monitor speakers and no noise or
other abnormal sound is heard, and that no sound is played while MUTE
is displayed on the screen.
* Leave the a 1/4-inch stereo phone plug connected to the PHONES jack on the
GT-10.
Testing of OUTPUT L/R and the Monaural Jack
Switch
1. Using the two cables with 1/4-inch phone plugs, connect the OUTPUT L
and Rjacks to channel 1 and channel 2 of the oscilloscope and to the left-
channel and right-channel monitor speakers.
2. Verify that the output waveform display on the oscilloscope is what is
shown in the figure below, and that no waveform is displayed while
MUTE is displayed on the screen.
fig.12out-out.eps
Upper: left channel, lower: right channel
3. Verify that the peak value for both the left and right channels is 1.55 to
1.75 V.
4. Verify that signals are output from the monitor speakers and no noise or
other abnormal sound is heard, and that no sound is played while MUTE
is displayed on the screen.
5. Detach the plug from the OUTPUT R jack.