Boss GX 700 Guitar Effects Service Manual

Page 1

Feb, 1996 GX-700

DISHESGX-7IIIIII SERVICE NOTES
GUITAR EFFECTS First Edition

PROCESSOR W
ERRATA & SLPPLEBENT is attached at the end of the page.

DDDDDDDDDDDDDDDDDD

TABLE OF CONTENTS E 3i Page
GAIN CV CALIBRATION ........................ GAIN CVEEE ................................ 2
SPECIFICATIONS ............................. LEI; ........................................ 2
LOCATION OI: CONTROLS .................... [f2 gag. ................................ 3
EXPLODED VIEW ............................. Qfig- ...................................... 4
BLOCK DIAGRAM . . ........................ jEI y 7- .................................. 5
PARTS LIST .................................. /\°_y I) x I ............................ 6 ~ 8
TESTMODE .................................. 711 Lag-F ............................ 9~16
IDENTIFYING THE VERSION NUMBER ---------- N- > a >m€§£7aifi ------------------------ 17
RESTORING THE FACTORY PRESETS --------- 7 7 7 |~ U - - 7" U E y I waif/35$ ---------- 17
DATA SAVE ................................... 55-7012-7 .......................... 18 19
DATA LOAD .................................. 53-90EI- I: .............................. 20
TROUBLESHOOTING ......................... I\ 5 7", t/ :L _ 7-. f / 7 ..................... 21
ERROR MESSAGE ............................ I a _ j 7 t _ 3/ ...................... 22~24
IC DATA ...................................... I071:- 7 ................................. 25
CHANGE INFORMATION ....................... gfigw .................................... 25
MAIN BOARD ASS'Y ........................... MAIN BOARD ASS'Y ..................... 26~28
SW BOARD ASS'Y ............................ SW BOARD ASS'Y ....................... 26~28
LED BOARD ASS'Y ........................... LED BOARD ASS'Y ...................... 26~28
ENC BOARD ASS'Y ........................... ENC BOARD ASSY ...................... 26~28
Q @ mm WI nmuuu IEDSS © W EFFECTSELECY U W mm mm © C)
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@Roland 17059331 Copyright © 1996 by ROLAND CORPORATION Primed in Japan (AFAO) (CR) 1

Page 2

GX-700

© CAUTION
The GAIN CV calibration must be done before you give
back the unit to the user.

GAIN CV CALIBRATION/GAIN CVfifig
© NOTE
Keep the unit powered on several minites to warm it

before calibrating GAIN CV.

1.Turn the power back on while pushing [PREAMP] and
[SP.SIM] to enter the test mode.

2.Turn [NUMBER/VALUE] to select "9. GAIN CV"

Feb, 1996

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3.Push [NUMBER/VALUE] to ca
automatically.

librate GAIN CV

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4.The result will be displayed after calibration.

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SPECIFICATIONS/111%

CODA/D Conversion 22 bit AF Method
©D/A Conversion 8 bit 16 times Oversampling A 2 Modulation
©Sampling Frequency 4.1 kHz
©Program Memoryw 00: 100(User) + 100(Preset)
©Nominal Input Level : INPUT: -10 dBm RETURN: >10 dBm
©Input Impedance ----- : INPUT: 1 MD FIETURN: 450 kg
©Nominal Output Leve : OUTPUT: 710 dBm to + 4 dBm SEND: >10 dBm
©Output Impedance ~ OUTPUT: 3 k9 or less SEND: 2 k9
©Headphones Ou ut .2 mW (33 (1 Load)
©Dynamic 00 dB or greater (lHF-A)
©Controls -» .

INPUT LEVEL Knob, NUMBER/VALUE

WAH,OD/DIST, PREAMP, LOOP, EQ. SP.

Knob, POWER Switch. EFFECT PARAMETER Buttons(COMP.
SIM. NS. MOD. DELAY, CHORUS. TREM/PAN. REVERB, LEVEL

CHAIN) PLAY Button. WRITE Button. PARAMETER Button L/R, BYPASS Button, TUNER/UTILITY Button

OUTPUT LEVEL Knob
16 characters. 2 lines (backlit LCD)
EAK Indicator
:
INPUT Jack, HEADPHONES Jack

©Display ~
© Indicator
© Connectors

INPUT Jack, OUTPUT Jack L(MONO)/R, SEND Jack. RETURN Jack, Expression Pedal Jack. CONTROL 1/2
Jack, MIDI ConnectorsUN. OUT, THRU), AC ADAPTOR Jack

©Power Supply :AC 14V; Supply AC Adaptor
(BOSS BRO-100. 120. 230. 240)
©Current Draw : 800 mA

©Dimensions ~ 2482 (W) x 197 (D) x 44 (H) mm
19 (W) x 73/4 (D) x 1-3/4 (H) inches

(ElA-1U rack mount type)

©Weight~ ' .0 kg / 4 lbs 7 oz (excluding the AC Adaptor)
©Accessorles . Owners Manual Japanese (70674423)
English (70783823)
AC Adaptor BRO-100 (100V) (00899078)
BRO-120 (120V) (00899089)
BRO-230 (230V) (00899090)
BRO-240 (240V) (00899101)
©Options :MIDI FootController: FC-200(Roland), FC-50
Foot Switch: FS-SU, FS-5L
Expression Pedal: EV-5 (Roland).

FV-SOOL + PCS-33 (Roland)

' 0 dBm = 0.775 Vrms

2

Page 9

Feb, 1996

TEST MODE/5'1 l~ :E- F

CAUTION:
If the memory contains user data, be sure to save it to a
temporary memory device like a sequencer (MC-SOMKH
etc.) before performing repairs.
(To save the user data, refer to "DATA SAVE" and "DATA
LOAD".)

(3 Test items
1. Battery
2. LCD Contrast
3. LCD/LED
4. Key/Control
5. Expression Pedal
6. MIDI IN/OUT
7. DSP Check
8. D/A Test
9. Gain CV
10. OD/DS Mode
11. Noise(Output)
12. Noise(Send/Fteturn)
13. Noise(OD/DS)
14. Return
15. Frequency Response
16. Factory Load

© Required items
Foot SW(FS-5U x2)+Cable(PCS-31)
Expression Pedal(EV-5)
MIDI Cable
Noise Meter
Oscilloscope
Oscillator
Opened plug

C) To enter the test mode
Turn the power back on while pushing [PREAMP] and
[SP.S|M].

The display shows the version number.

GX-700

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1. Battery
LCD Contrast
LCD/LED
Key/Control
Expression Pedal
MIDI IN/OUT
DSP Check
D/A Test
Gain CV
10. OD/DS Mode
11. Noise(0utput)
12. Noise(Send/Retum)
13. Noise(OD/DS)
14. Retum
15. Frequency Response
16. Factory Load

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Expression Pedal(EV-S)
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Turn [NUMBERNALUE] to select the desired test item
from among the following items. When the desired item
is displayed. Press [NUMBER/VALUE] to start the test.
Press [NUMBER/VALUE] again to exit from test of the
item.

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