Roland SUPER Octave OC-3 Operating and maintenance manual

SERVICE NOTES
Issued by RJA
Copyright © 2003 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission
of ROLAND CORPORATION.
Printed in Japan (0800) (NB)17058182E0
Sep.2003 OC-3
TABLE OF CONTENTS
SPECIFICATIONS.............................................................2
LOCATION OF CONTROLS ..........................................4
LOCATION OF CONTROLS PARTS LIST ...................4
EXPLODED VIEW ............................................................5
EXPLODED VIEW PARTS LIST .....................................5
PARTS LIST........................................................................6
TEST MODE.......................................................................9
CIRCUIT BOARD............................................................13
CIRCUIT DIAGRAM......................................................14

2
Sep.2003
SPECIFICATIONS
OC-3: SUPER Octave
Nominal Input Level
-20 dBu
Input Impedance
1 M ohm
Nominal Output Level
-20 dBu
Output Impedance
1 k ohm
Recommended Load Impedance
10 k ohms or greater
Residual Noise
-96 dBu (IHF-A, Typ.); All knobs at center position
Controls
Pedal switch, DIRECT LEVEL knob, OCT 1 LEVEL knob, CONTROL knob,
MODE knob,
Indicator
CHECK indicator (Serves also as battery check indicator)
Connectors
GUITAR IN jack, BASS IN jack, OUTPUT (MONO) jack, DIRECT OUT jack,
AC adaptor jack (DC 9 V)
Power Supply
DC 9 V: Dry battery (9 V type) 6AM6/9 V (alkaline),
Dry battery (9 V type) S-006P/9 V (6F22/9 V)
AC Adaptor (PSA-series: optional)
Current Draw
50 mA (DC 9 V)
* Expected battery life under continuous use:
Carbon: 2 hours, Alkaline: 6 hours
These figures will vary depending on the actual conditions of use.
Dimensions
73 (W) x 129 (D) x 59 (H) mm
2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight
440 g /1 lb (including battery)
Accessories
Owner’s Manual ENGLISH: (#G6017375)
JAPANESE: (#G6017374)
Dry Battery: (#*******) (9 V type) S-006P/9 V (6F22/9 V)
Options
AC Adaptor (PSA-series)
*0dBu=0.775 Vrms
* In the interest of product improvement, the specifications and/or appearance of
this unit are subject to change without prior notice.

3
OC-3

4
Sep.2003
LOCATION OF CONTROLS
fig.panel
LOCATION OF CONTROLS PARTS LIST
1
2
4
5
6
7
8
9
10
11
12
13
1415
3
3
NO PART CODE PART NAME DESCRIPTION
1 22480260 P R-KNOB MF BLK/LCG
F3219113 POTENTIOMETER RD901-20-15FW-B54-0039
2 13449150MF JACK HTJ-064-12D
3 13449140MF JACK HTJ-064-14D
4 75E072T000 PEDAL
5 2235730400 FOOT BASE (PEDAL MAT)
6 H5029820 THUMB SCREW 3X10mm (Black)
7 G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY
8 2235730500 BOTTOM BASE
9 2202785100 BOTTOM COVER
10 F3449150 JACK 2LJ-650NHW00
11 22480260 P R-KNOB MF BLK/LCG
F3219114 POTENTIOMETER RD901-20-15FD-B54-0339
12 75E073C000 CASE
13 1502928100 LED (RED) L-34HDSL
14 13449717 AC ADAPTOR JACK HEC2392-01-150
15 2253753801 PSA CAUTION

5
OC-3
EXPLODED VIEW
fig.explo
EXPLODED VIEW PARTS LIST
[PARTS]
[SCREW]
11
2
3
4
a
5
6
7
8
9
d
10
b
c
NO PART CODE PART NAME DESCRIPTION Q’TY
1 13129710 SWITCH (PUSH) JM-0404 1
2 2226733300 CUSHION 1
3 F3419102 BATTERY CONNECTOR 1
4 G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY 1
5 2235730500 BOTTOM BASE 1
6 2202785100 BOTTOM COVER 1
7 G2167301 INSULATION SPACER 1
8 2215770201 PEDAL GUIDE BUSH 1
9 2217710900 COIL SPRING 1
10 2235730400 FOOT BASE (PEDAL MAT) 1
NO PART CODE PART NAME DESCRIPTION Q’TY
a H5039401 NYLON WASHER M3X6X0.5 2
b H501941301 SCREW M3X10 BINDING MACHINE FEBC 2
c H5029325 SCREW M3X6 PAN HEAD TAPTITE B1 FEBC 4
d H5029820 SCREW M3X10 THUMB SCREW 1

6
Sep.2003
PARTS LIST
fig.part1e
SAFETY PRECAUTIONS:
The parts marked have
safety-related characteristics. Use
only listed parts for replacement.
CONSIDERATION ON PARTS ORDRING
When ordering any parts listed in the parts list, please specify the following items in the order sheet.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex. 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.
NOTE: The parts marked # are new. (initial parts)
CASING Q'TY
2235730400 FOOT BASE (PEDAL MAT) 235-304 1
2202785100 BOTTOM COVER 202-851 1
2235730500 BOTTOM BASE 235-305 1
# 75E073C000 CASE 1
# 75E072T000 PEDAL 1
KNOB,BUTTON
22480260 MF BLK/LCG P R-KNOB 4
SWITCH
13129710 JM-0404 SWITCH (PUSH) SW1 1
JACK,EXT TERMINAL
13449150MF HTJ-064-12D PHONE JACK (STEREO) JK2 1
F3449150 2LJ-650NHW00 JACK (STEREO+SW) JK6 1
13449140MF HTJ-064-14D JACK (STEREO) JK5,JK7 2
13449717 HEC2392-01-150 ADAPTOR JACK JK1 1
PWB ASSY
#75E073O000 OUT JACK ASSY OUTPUT (MONO) 1
# 75E073I000 IN JACK ASSY GUITAR IN + BASS IN 1
# 703433L000 LED BOARD ASSY 1
# 75E073P000 MAIN BOARD ASSY 1
IC
02897778 S-80130ALMC-JAP-T2 IC (RESET) IC9 1
F5289101 NJM2100M 8P SOP IC (OP.AMP) IC2 1
02565501 TC220CCA0AF-B01 (MR3) IC (DSP) IC7 1
F5179125 S-8520E33MC-BJS-T2 IC (DC-DC) IC6 1
# 03349278 UPD780034AGK-B10-9ET V1.00 IC (CPU) IC5 1
15189261 M5218AFP-600E IC (BIPOLAR OP AMP) IC1,IC3,IC4 3
02451434 AK4552VT IC (AD/DA) IC8 1
TRANSISTOR
15309104 2SA1586-GR (TE85R) TRANSISTOR Q13 1
15319107 2SC4116-GR (TE85R) TRANSISTOR Q1,Q8,Q9,Q10,Q11,Q12 6
15329103 2SK880GR-TE85R FET TRANSISTOR Q3 1
F5329502 2SJ190 FET Q15 1
F5329530 2SK879Y FET Q4,Q5,Q6,Q7 4
DIODE
1502928100 L-34HDSL LED (RED) LED1 1
15339119 1SS-352 DIODE D4,D5,D6,D7 4
F5339201 GS1G DIODE D2 1
F5339137 SS14 VF=0.45V DIODE D1,D3 2
RESISTOR
#F5399104 10 J MTL.FILM RESISTOR R22 1
# F5399170 100K J MTL.FILM RESISTOR R33,R39,R46,R50,R54,R58,R73,R77 8
# F5399140 10K J MTL.FILM RESISTOR R2,R3,R12,R14,R20,R21,R76,R90,R92 9
# F5399147 15K J MTL.FILM RESISTOR R11,R23,R27 3
# F5399128 1K J MTL.FILM RESISTOR R34,R40,R67,R74,R88 5
# F5399200 1M J MTL.FILM RESISTOR R13,R26,R30,R35,R41,R43,R47,R51,R55,R79 10
# F5399130 2.2K J MTL.FILM RESISTOR R1 1

7
OC-3
#F5399152 22K J MTL.FILM RESISTOR R7,R8,R10,R15,R16,R24,R28,R31,R32,R36,R37,
R38,R42,R61,R62,R65,R81,R82
18
# F5399154 27K J MTL.FILM RESISTOR R89 1
# F5399156 33K J MTL.FILM RESISTOR R64 1
# F5399298 4.7 J MTL.FILM RESISTOR R100 1
# F5399106 47 J MTL.FILM RESISTOR R78 1
# F5399160 56K J MTL.FILM RESISTOR R9,R25,R29,R44,R45,R48,R49,R52,R53,R56,
R57,R63
12
F5429365 10K OHM F RANK (1%) CHIP RESISTOR R91 1
F5429386 150K F (1608TYPE) CHIP RESISTOR R19 1
RESISTOR
POTENTIOMETER
# F3219113 RD901-20-15FW-B54-0039 POTENTIOMETER NON CLICK VR1,VR2,VR3 3
# F3219114 RD901-20-15FD-B54-0339 POTENTIOMETER 3CLICK VR4 1
CAPACITOR
01906178 ECPU1C104MA5 (SUBMICRON) MYLAR CAPACITOR C13 1
F5359732 GRM39B102J50PT CERAMIC CAPACITOR C78 1
F5359740 GRM39B222K50PT CERAMIC CAPACITOR C11,C34,C38 3
F5359370 GRM39CH180J50PT CERAMIC CAPACITOR C73 1
F5359704 GRM39CH220J50PT CERAMIC CAPACITOR C62,C63,C72 3
F5359800 GRM39F104Z25PT CERAMIC CAPACITOR C2,C20,C24,C26,C28,C31,C47,C48,C49,C50,
C55,C56,C57,C58,C61,C65,C66,C67,C68,C69,
C74,C75,C77,C79
24
# F3629695KM 1/50V CHEMICAL CAPACITOR C23 1
F3629705 10/16V SV P=1.5 4X5 CHEMICAL CAPACITOR C10,C19,C41,C44,C80,C81 6
F3629700 10U/16V (H=7MM) CHEMICAL CAPACITOR C14,C21,C22,C25,C33,C36,C37,C40,C43 9
# F3629680 47/16V CHEMICAL CAPACITOR C3,C5,C27,C60 4
# F5359725 ECJ1VC1H151J 150P J CERAMIC CAPACITOR C12,C35,C39,C42,C45 5
# F5359817 GRM39B683K50PT 0.068 K CERAMIC CAPACITOR C71 1
13629550KM 100/16V CHEMICAL CAPACITOR C1,C4,C46,C76 4
INDUCTOR,COIL,FILTER
F2449210 SLF7032T-4R7M1R7-2 (4.7UH) SMD COIL L2 1
F5409131 QT04-60 EMI L1 1
F2449209 SLF7032T-151MR29-2 (150UH) COIL L3 1
CRYSTAL,RESONATOR
F5299307 HC-49SM 11.2896MHZ CRYSTAL X2 1
F5299114 HC-49SM 5MHZ CRYSTAL X1 1
WIRING,CABLE
G3477166 FLAT CABLE 7P-100X6X6 P=2.0 CN2,CN5 1
SCREWS
H5029820 SCREW M3X10 THUMB SCREW 1
H5029325 SCREW 3X6 PAN HEAD TAPTITE-2 BC 5
H5039205 WASHER 12.5X9.5X0.5/0.9 INTERNAL TOOTH FENI 4
H5039510 NUT M9X12X2 FENI 4
H501941301 SCREW 3X10MM BINDING MACHINE FEBC 2
H5039104 JACK WASHER M9.2X14X1.6 AL 1
22137709 JACK SPACER M9.6X14X1.0 1
H5039401 NYLON WASHER 3X6X0.5 2
H5039521 VR ACCESSORY NUT M7 4
H5039112 WASHER M9 4
PACKING
G2627738 INNER BOX 1
# G2607111 PACKING CASE 1
MISCELLANEOUS
G253751603 BOTTOM CAUTION PSA FCC/CE/C-TICK/EMC GRY 1
# F2557302 INSULATING SHEET DIRECT OUT 1
H5319102 INSULOK TIE 80M/M T-18S 2
2253753801 PSA CAUTION 253-538 1
2226733300 CUSHION 226-333 1
2217710900 COIL SPRING 217-109 1
2215770201 PEDAL GUIDE BUSH 215-702 1
F3419102 BATTERY CONNECTOR (006P) 1
22257257 EARTH TERMINAL ET1,ET2 2
G2167301 INSULATION SPACER 1
H2369402 POLYCA PIPE M3X6X6 1

8
Sep.2003
ACCESSORIES (Standard)
#******** BATTERY MANGANESE 1
# G6017374 OWNER’S MANUAL JAPANESE 1
# G6017375 OWNER’S MANUAL ENGLISH 1

9
OC-3
TEST MODE
Required Items
Tools Required
• Oscillator
• Oscilloscope
• Noise meter
• 47 k Ω short plug (#17041375)
fig.plug
• Monitor Speakers
1. Test Categories
1. DSP, CPU Check
2. DIRECT LEVEL Volume Check
3. OCT1 LEVEL Volume Check
4. CONTROL (RANGE, OCT2, DRIVE) Volume Check
5. AF/AD Check
6. DAC, JACK Switch Check
7. MUTE Check
8. MODE Volume Check
9. DSP THRU MAXIMUM Output Check
10. BYPASS MAXIMUM Output Check
11. Battery Check
12. Noise Check
2. Entering Test Mode
• Turn all volume controls down completely (to minimum). Set MODE to
DRIVE.
• Hold down the pedal and connect the DC plug to adapter jack.
• When CHECK lights up, release the pedal.
• The CHECK light goes off for approximately two seconds, then lights
again, indicating that the unit has entered test mode.
The unit will not switch to test mode unless all volume controls are turned
completely down. Furthermore, the unit will not enter test mode if, due to
faulty volume controls or other cause, the minimum value is not detected for
all volume controls.
If CHECK does not light, if may be due to a faulty LED. Switch the pedal on
and off in Normal mode to confirm that CHECK lights and goes off. If CHECK
flashes, refer to “1. DSP, CPU Check” in “3. Tests.”
For instructions on skipping tests in order to perform only a particular test
item, refer to “5. Instructions for Performing Only Desired Tests” following the
detailed descriptions of the test items.
3. Tests
1. DSP, CPU Check
• Refer to “2. Entering Test Mode” and switch to Test mode.
•Acheck of the DSP and CPU is performed automatically while the
CHECK light is off. If no problem is detected, CHECK lights up and the
unit enters Test mode; CHECK flashes if an error has occurred.
•Connect the oscillator to GUITAR IN or BASS IN and input a rectangular
wave (200 Hz, 100 mVp-p) and check the waveform output with the
oscilloscope from both OUTPUT (MONO) and DIRECT OUT. Confirm
that the waveform output is the same 200 Hz, 100 mVp-p waveform
shown in the figure (DSP THRU).
fig.test-DSPthru_50
50mV/DIV, 1mS/DIV
• If CHECK lights up, the process automatically advances to the next step.
If CHECK flashes, it may be due to a fault surrounding the DSP or CPU, faulty
soldering, or other such problems. Disconnect the DC plug from the adapter
jack and turn off the power.
2. DIRECT LEVEL Volume Check
• Rotate the knob in the clockwise direction from minimum to center, then
to maximum; CHECK should change from lit to off to lit.
• When the maximum is detected, CHECK lights up, and then the process
advances to the OCT1 LEVEL Volume Check.
3. OCT1 LEVEL Volume Check
• Rotate the knob in the clockwise direction from minimum to center, then
to maximum; CHECK should change from lit to off to lit.
• When the maximum is detected, CHECK lights up, and then the process
advances to the CONTROL (RANGE, OCT2, DRIVE) Volume Check.
The maximum values for the OCT1 LEVEL Volume Check and DIRECT
LEVEL VOLUME are detected simultaneously. The OCT1 LEVEL Volume
Check is not run unless the DIRECT LEVEL Volume maximum is detected.
4. CONTROL (RANGE, OCT2, DRIVE)
Volume Check
• Rotate the knob in the clockwise direction from minimum to center, then
to maximum; CHECK should change from lit to off to lit.
• When the maximum is detected, CHECK lights up, and then the process
advances to the AF/AD Check.

10
Sep.2003
The maximum values for the CONTROL Volume Check and the OCT1 LEVEL
Volume are detected simultaneously. The CONTROL Volume Check is not run
unless the OCT1 LEVEL Volume maximum is detected.
5. AF/AD Check
• Confirm that the MODE control is set to DRIVE.
• Use the oscillator to input a sine wave at 200 Hz, -25 dBm (FLAT) to
GUITAR IN or BASS IN.
• Check the waveform output with the oscilloscope from both OUTPUT
(MONO) and DIRECT OUT. Confirm that the waveform is the same as
that shown in the figure and that there is no distortion.
fig.test-AFAD_50
50mV/DIV, 1mS/DIV
• Check the waveform output with the noise meter from both OUTPUT
(MONO) and DIRECT OUT. Confirm that each waveform output is
FLAT and between -28.5 dBm and -25.5 dBm.
6. DAC, JACK Switch Check
• Confirm that the MODE control is set to OCT2. CHECK goes off.
• Use the oscillator to input a sine wave at 200 Hz, -25 dBm (FLAT) to
GUITAR IN.
• Connect plugs to both the OUTPUT (MONO) and DIRECT OUT jacks,
and check the waveform output from both jacks with the oscilloscope.
Confirm that the waveform output from DIRECT OUT is a 200 Hz
rectangular wave, the waveform output from OUTPUT (MONO) is a 200
Hz sine wave, and that the waveform is the same as that shown in the
figure.
fig.test-DA200HzD_50
50mV/DIV, 1mS/DIV
• Disconnect the plug connected to the DIRECT OUT jack.
• Confirm that the waveform output from OUTPUT (MONO) is a 200 Hz
rectangular wave, and that the waveform is the same as that shown in
the figure.
fig.test-DA200HzM_50
50mV/DIV, 1mS/DIV
• Disconnect the plug connected to the GUITAR IN jack and connect it to
BASS IN. Confirm that the waveform output from OUTPUT (MONO) is
a 400 Hz rectangular wave, and that the waveform is the same as that
shown in the figure.
fig.test-DA400HzM_50
50mV/DIV, 1mS/DIV
• Connect the plug to the DIRECT OUT jack.
Confirm that the waveform output from DIRECT OUT is a 400 Hz rectangular
wave, the waveform output from OUTPUT (MONO) is a 200 Hz sine wave,
and that the waveform is the same as that shown in the figure.
fig.test-DA400HzD_50
50mV/DIV, 1mS/DIV

11
OC-3
7. MUTE Check
• Confirm that the MODE control is set to POLY. CHECK lights up.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Check the waveform output from both OUTPUT (MONO) and DIRECT
OUT with the oscilloscope. Confirm that the waveform is the same as
that shown in the figure.
fig.test-MUTE_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that each waveform output is FLAT and at
or below -74 dBm.
8. MODE Volume Check
• Confirm that CHECK lights up when the MODE control is set to POLY.
• Set the MODE control is to OCT2. Confirm that CHECK goes off.
• Set the MODE control is to DRIVE. Confirm that CHECK lights up.
Rotate the knob slowly and firmly.
9. DSP THRU MAXIMUM Output
Check
• Confirm that the MODE control is set to DRIVE.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Check the waveform output from both OUTPUT (MONO) and DIRECT
OUT with the oscilloscope. Confirm that the waveform is the same as
that shown in the figure and that there is no distortion.
fig.test-MAXdsp_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that each is FLAT and between +3 dBm
and +6 dBm.
10. BYPASS MAXIMUM Output Check
• Press the pedal.
• Confirm that CHECK goes off and then comes on again (exiting Test
mode).
• Press the pedal again, and confirm that CHECK goes off (so that the
effects are switched off).
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Connect plugs to both the OUTPUT (MONO) and DIRECT OUT jacks,
and check the waveform output from both jacks with the oscilloscope.
Confirm that the waveform is the same as that shown in the figure, with
no waveform output from OUTPUT (MONO) and no distortion in the
waveform output from DIRECT OUT.
fig.test-MAXdout_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that the DIRECT OUT output level is
FLAT and between +3 dBm and +6 dBm, and that the OUTPUT (MONO)
output is FLAT and at or below -80 dBm.
• Disconnect the plug connected to the DIRECT OUT jack.
• Check the waveform output from OUTPUT (MONO) with the
oscilloscope. Confirm that the waveform is the same as that shown in the
figure and that there is no distortion in the waveform.
fig.test-MAXout_50
1V/DIV, 1mS/DIV
•Check the OUTPUT (MONO) output level with the noise meter. Confirm
that the output level is FLAT and between +3 dBm and +6 dBm.

12
Sep.2003
11. Battery Check
•Press the pedal and confirm that CHECK lights up (so that the effects are
switched on).
• Confirm that a plug is connected to either the GUITAR IN jack or BASS
IN jack.
• Disconnect the DC plug from the adapter jack.
• Confirm that CHECK is lit.
If CHECK is dimmer than when used with the adapter, it indicates that the
batteries are going dead.
12. Noise Check
• Connect the DC plug to the adapter jack.
As this checks places a drain on the batteries, use the adapter when
performing this check.
• Confirm that CHECK is lit and that the effects are on.
• Turn all volume controls to maximum. Set the MODE to POLY.
• Connect the short plug (47 k ohm) at “GUITAR IN JACK”.
• Connect plugs to both the OUTPUT (MONO) and DIRECT OUT jacks
and check the residual noise from both jacks with the noise meter.
Confirm that both are JIS-A, at or below -92 dBm.
• Press the pedal so that CHECK goes off, switching off the effects.
• Check the residual noise from DIRECT OUT with the noise meter.
Confirm JIS-A at or below -98 dBm at.
• Connect the monitor speakers to DIRECT OUT.
• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm
that the unit produces no unusual noise.
• Switch the pedal between ON and OFF, and confirm that no switching
noise is produced.
• Switch CHECK so that it is unlit and the effects are switched off.
• Disconnect the plug connected to the DIRECT OUT jack.
• Check the residual noise from OUTPUT (MONO) with the noise meter.
Confirm JIS-A, at or below -98 dBm.
• Connect the monitor speakers to OUTPUT (MONO).
• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm
that the unit produces no unusual noise.
• Switch the pedal between ON and OFF, and confirm that no switching
noise is produced.
• Switch on the CHECK light so that the effects are switched on.
• Rotate each knob to confirm that the unit produces no unusual noise.
4. Exiting Test Mode
• The pedal can be pressed to exit Test mode.
“10. BYPASS MAXIMUM Output Check,” “11. Battery Check,” and “12. Noise
Check” are performed in Normal mode, and are not checked as part of the test
items.
5. Instructions for Performing
Only Desired Tests
• Refer to “2. Entering Test Mode” to switch to Test mode.
• The “DSP, CPU Check” is run automatically when the pedal is released,
and CHECK lights up if there are no errors.
• Rotate the MODE control to the desired test category.
DRIVE: Volume checks, DSP THRU Maximum Output Level.
OCT2: DAC, Jack Switch Check
POLY: MUTE Check, MODE Volume Check
The Volume checks cannot be run in the following sequence: DIRECT LEVEL,
OCT1 LEVEL, CONTROL.
The AF/AD Check is not selectable. It may be run after the Volume checks.
In addition, the DSP THRU Maximum Output Level cannot be run
immediately following the Volume checks. Run the test after switching the
MODE control back to DRIVE.
To run “10. BYPASS MAXIMUM Output Check,” “11. Battery Check,” or “12.
Noise Check,” turn on the power and perform them in Normal mode, without
switching to Test mode.
6. Precautions
Run all checks following repairs or servicing.

13
OC-3
CIRCUIT BOARD
fig.main-top fig.main-bottom

14
Sep.2003
CIRCUIT DIAGRAM
fig.circuit
VR BOARD
(PCB F2927015 00 1/6)
SW BOARD
(PCB F2927015 5/6)
LED BOARD
A9V
(PCB 2291749600)
RED
006 P
RESET
OUTPUT
WHT
GLY
CHECK
LED-RED
LED-GRN
RED
BYO
GRN
ORG
OC-3 MAIN BOARD ASSY 75E073P000
DC/DC
Converter
A8V
A4V
A4V
A8V
A8V
A4V
A9V
AC
ADAPTOR
A9V
(PCB F2927015 2/6)
A4V
A4V
IN-A
IN-B
OUT-A
OUT-B
EFX-A
DIR-B
DIR-A
Serial I OSerial I O
GND
SO
SCK
RESET
VDD
Vpp
SI
N.I.U
EFX-B
EFX-A
DIR-B
DIR-A
EFX-B
VR3-B/EXP-2
VR1-B
EXP1
D.TIME
F.BACK
E.LEVEL
MODE
IN-B_SW
OUT-A_SW
CPU
DIR-A
OUT-B_SW
LED-GRN
EFX-B
DIR-B
IN-A_SW
EFX-A
LED-RED
VR2-B
LED BOARD
(PCB F2927015 6/6)
CHECK
(RED/GRN)
RED
GRN
DSP (MR3)
AD/DA
49US SMD
(PCB F2927015 4/6)
JACK2 BOARD
ORG
GRN
BASS IN
BRN
YEL
BLK
GUITAR IN
BLK
ORG
DIRECT
LEVEL
or RK0972210
OCT1
RANGE,OCT2,
DRIVE
MODE
50kB
50kB
50kB
50kB
A4V
A4V
A4V
A4V
DIRECT OUT
BLK
BRN
JACK1 BOARD (PCB F2927015 3/6)
BLU
MIDI
SO
SI
SCK
Vpp
CA3 CA4
BCLK MCLK
BCLK AD MCLK LRCK
DA LRCK
DA
AD
CA2 CD5
CD3
CD3
CD2
CD4
CA1 CD6
CA1
CA0
CD1
CD5 CD4 CD1
CD2
CD0
CA0 CD7 CD0
CD7 CA2
CD6
CA3 CA4
INT0 INT1
INT1 INT0
RD
RD
WR
WR
D
A
+
D3.3
+
D
A
+
D3.3
D
+
D3.3
DA
D
+
D3.3
+
D3.3
D
+
A
A
+
A
A
+
+
+
+
+
+
+
A
A
+
A
+
+
A
+
+
+
+
DA
DA
++
DA
+
D3.3
D
D
+
D3.3
+
D
+
D3.3
D
+
D3.3
DA
+
+
D3.3 +
D3.3 +
D3.3
+
D3.3
D
+
D3.3
D
+
D3.3
D
D
+
D3.3
+
D3.3
DD
D
D
+
D3.3
D
D
D
+
D3.3
D
A
+
D3.3
D A
A
D
+
D3.3
D D
+
D3.3
D
+
D3.3
+
D3.3
D
+
D3.3
D D
+
D3.3
+
D3.3
D
+
D3.3
D
D
+
D3.3
+
D3.3
+
D3.3
+
D3.3
D
+
D3.3
+
+
A
+
+
+
+
D3.3 +
D3.3
D
D
D
DD
D
D
R74 1k SW1
JM-0404
1 2
L3
SLF7032T-151MR37-2 150uH
R38 22k
Q12 2SC4116GR
1
23
Q14 N.I.U
1
32
R66 N.I.U
R65 22k
R34 1k
R33 100k
R73 100k
ET1
EARTH_TERMINAL (RV-2)
ET2
EARTH_TERMINAL (RV-2)
1
14
LED1 LED2
9 10
15 16
IC9 S-80130ALMC-JAP-T2
DS
1VDD 5
VSS
2
OUT 4
NC
3
3
R61 22k
R62 22k
R59 N.I.U
IC6 S-8520E33MC-BJS-T2
ON/OFF
1
VIN
5
VSS
2
EXT 4
VOUT 3
L2 SLF7032T-4R7M1R7-2 4.7uH
R4 N.I.U C7
N.I.U
R6 N.I.U
Q2 N.I.U
3
1 2
DA1 N.I.U 21
3
R5 N.I.U
R37 22k R40
1k
C14 10/16
R39 100k
11
C41 10/16
R35 1M
Q6 2SK879Y
3
12
C44 10/16
R41 1M
R42 22k
Q7 2SK879Y
3
12
R30 1M
R84 N.I.U
2
C37 10/16
C38 0.0022
R27 15k
R23 15k
C34 0.0022
R25 56k
C33 10/16
R24 22k
C35 150p
C12 150p
R9 56k
R11 15k
R10 22k
C11
0.0022
R12 10k C13
0.1(S)
Q3 2SK880GR
3
1 2
DA2 N.I.U 21
3
R13 1M
CN1-1
R67 1k R68 N.I.U
R1 2.2k C2 0.1
C4 100/16
Q1 2SC4116GR
1
23
L1 QT04-60
1 2
4 3
JK1 HEC2392-01-150
2 1 3 4 5
JK5 HTJ-064-14D
1 2 3
C45 150p
+ -
IC3C M5218AFP
84
Q13 2SA1586GR
1
32
Q4 2SK879Y
3
12
C43 10/16
R32 22k C42 150p
R36 22k R31 22k
Q5 2SK879Y
3
12
R26 1M
C36 10/16
D5 1SS352
D6 1SS352
D7 1SS352
R29 56k
R28 22k
C40 10/16
C39 150p
C16 N.I.U
R19 150kF
+ -
IC2A
NJM2100M
2 3
1
C18 N.I.U
R17 N.I.U
C17
N.I.U
R52 56k
R51 1M
R53 56k
C49 0.1
D4 1SS352
R56 56k
R55 1M Q9
2SC4116GR
1
2 3
C48 0.1
Q11 2SC4116GR
1
2 3
R48 56k
R47 1M
R49 56k
C50 0.1
C21 10/16 C22 10/16
R60 N.I.U
+ -
IC2C NJM2100M
84
C20 0.1
R82 22k
CN1-2
+ -
IC4C M5218AFP
84
13
CN3
A2001WV2-7P
1
1
2
2
3
3
4
4
5
5
6
6
7
7
CN4
N.I.U
1
1
2
2
3
3
R46 100k R50
100k R54
100k
R58 100k
Q15 2SJ190
1
23
R77 100k
R57 56k
R45 56k
C60 47/16
C62 22p
C61 0.1
C63 22p
X1 5MHz
Q8 2SC4116GR
1
2 3
+ -
IC2B NJM2100M
6 5
7
C6 N.I.U
R63 56k
R2 10k
D1
SS14
R85 N.I.U
C8 N.I.U
R75 N.I.U
C9 N.I.U
R14 10k
C10 10/16
+ -
IC4B M5218AFP
6 5
7
+ -
IC4A M5218AFP
2 3
1
R18 N.I.U
R91 10kF
CN1-3
1
LED1 L-34HDSL
1 2
LED1 N.I.U
1 2 3
CN6-1
1
CN6-3
1
CN6-2
1
C68 0.1 C66
0.1
C74 0.1
C73 18p
C72 22p
C64 N.I.U
R88 1k
R79 1M
C65 0.1
C78 0.001
C67 0.1
C69 0.1
R89 27k
R80 N.I.U
C71 0.068
R78 47
C28 0.1
C23 1/50 C24
0.1
C25
10/16
R22 10
C27 47/16
C26 0.1 IC8 AK4552VT
RIN
1
LIN
2
VSS
3
VA 4
VD 5
DEMO
6
DEM1
7
SDTO
8
SDTI
9
LRCK
10
MCLK
11
BCLK
12
PDN
13
VCOM 14
LOUT 15
ROUT 16
C31 0.1
X2 11.2896MHz
IC7 TC220CCA0AF-B01(MR3)
OSC 1
VSS
2
OSCSEL 3
VSS
4
XTO 5
XTI 6
VDD 7
DIVS0
8DIVS1 9
PLLBP
10
VSS
11 VSS
12
TESTP
13
VDD 14
VDD
15
PLLVAA
16
PLLRO
17
PLLLP
18
PLLAGS
19
PLLAGD
20
VSS
21
VSS
22
VDD 23
VDD 24
RST 25
VSS
26
CD7 27 CD6 28 CD5 29 CD4 30
VSS
31
TESTS
32
VDD 33
CD3 34 CD2 35 CD1 36 CD0 37
VDD 38
DRQ 39
INT0 40 INT1 41
DRST 42
VSS
43
CA4 44 CA3 45 CA2 46 CA1 47 CA0 48
VDD 49
RD 50
CS 51
VSS
52
WR 53
VSS
54
DIV 55
VDD 56
DA0
57
AD0
58
VDD 59
BCK
60
VSS
61
LRCK0
62
LRCK1
63
VDD 64
MCK
65
VSS
66
DA1
67
AD1
68
DA2
69
AD2
70
VSS
71
CTYPE 72
VDD 73
DA3
74
AD3
75
SYI 76
TESTB
77
TESTT
78
VDD 79
VSS
80
R20 10k
R83 N.I.U
R76 10k
R81 22k
VR1 RD901-20-15FW-B54-0039
1
2
3
CN5-7
VR2 RD901-20-15FW-B54-0039
1
2
3
CN5-4
VR3 RD901-20-15FW-B54-0039
1
2
3
CN5-8
VR4 RD901-20-15FD-B54-0339
1
2
3
CN5-5 CN5-9 CN5-6
VR6 N.I.U
1
2
3
VR5 N.I.U
1
2
3
VR7 N.I.U
1
2
3
CN5-2 CN5-3 CN5-1
CN2-8 CN2-9 CN2-6
C56 0.1
CN2-5 CN2-7
C57 0.1
CN2-4
C55 0.1
C58 0.1
CN2-3
R71 N.I.U
7
1
C76
100/16
R72 N.I.U C51
N.I.U
8
1
R69 N.I.U
R70 N.I.U
CN2-2 CN2-1
R7 22k
R8 22k
+ -
IC1B M5218AFP
6 5
7
C80 10/16
R16 22k
C81 10/16 R15
22k
+ -
IC1A M5218AFP
2 3
1
+ -
IC1C M5218AFP
84
C79 0.1
R90 10k R92
10k
+ -
IC3B M5218AFP
6 5
7
+ -
IC3A M5218AFP
2 3
1
IC5 uPD780034AGK-B10-9ET OC-3 V1.00
P50/A8
1P51/A9 2P52/A10 3P53/A11 4P54/A12 5P55/A13 6P56/A14 7P57/A15 8
VSS0
9VDD0 10
P30 11 P31 12
P32/SDA0 13
P33/SCL0 14
P34/SI31 15
P35/SO31 16
P36/SCK31 17
P20/SI30 18
P21/SO30 19
P22/SCK30 20
P23/RxD0 21
P24/TxD0 22
P25/ASCK0 23
VDD1 24
AVSS
25
P17/AN17 26 P16/AN16 27 P15/AN15 28 P14/AN14 29 P13/AN13 30 P12/AN12 31 P11/AN11 32 P10/AN10 33
AVREF 34
AVDD 35
RESET
36
XT2
37 XT1 38
IC 39
X2 40 X1 41
VSS1
42
P00/INTP0
43 P01/INTP1 44 P02/INTP2 45 P03/INTP3/ADTRG 46 P70/TI00/TO0 47 P71/TI01 48 P72/TI50/TO50 49 P73/TI51/TO51 50 P74/PCL 51 P75/BUZ 52
P64/RD
53 P65/WR 54 P66/WAIT 55 P67/ASTB 56
P40/AD0
57 P41/AD1 58 P42/AD2 59 P43/AD3 60 P44/AD4 61 P45/AD5 62 P46/AD6 63 P47/AD7 64
Q10 2SC4116GR
1
2 3
C47 0.1
R44 56k
R43 1M
12
JK2 HTJ-064-12D
1 2 3
18 17
JK7 HTJ-064-14D
1 2 3
6
1
5
1
C75 0.1
C46
100/16
R64 33k
JK6 2LJ-650NHW00
9 4 8 7 6 3 2
C19 10/16
R21 10k
C59 N.I.U
R3 10k
C1 100/16
D2
GS1G
4
C53 N.I.U
C3 47/16
C54 N.I.U
C5 47/16
C52 N.I.U
D3 SS14
C77 0.1
BT1
6F22
12
JK4 N.I.U
9 4 8 7 6 3 2
JK3 N.I.U
9 4 8 7 6 3 2
3
1
4
1
2
1
5
1
6
1
1
1
R100 4.7

15
OC-3

16
Sep.2003