Roland VG-8EX Operating and maintenance manual

Jul, 1998
VG-8EX
TABLE OF CONTENTS Page
SPECIFICATIONS•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••1
LOCATION OF CONTROLS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••2
EXPLODED VIEW•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••3
BLOCK DIAGRAM ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••4
CIRCUIT DESCRIPTION ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••4
PARTS LIST ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••5
TEST MODE•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••6~11
TROUBLESHOOTING •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••11, 12
DATA SAVE AND LOAD••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••12
LOADING THE FACTORY PRESET DATA••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••12, 13
SYSTEM VERSION UP ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••13
IDENTIFYING SYSTEM VERSION NUMBER •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••13
MAIN BOARD ASS'Y•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••14~20
PANEL BOARD ASS'Y•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
LED BOARD ASS'Y ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
R. ENCODER BOARD ASS'Y••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
VOLUME BOARD ASS'Y••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
FOOT SW BOARD ASS'Y•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
POWER BOARD ASS'Y •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••21, 22
Printed in Japan (ACE0) (CR) 1
17059926
Issued by RJA
Copyright c1998 by ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permission of
ROLAND CORPORATION.
SPECIFICATIONS
'Internal Memory ••••••••••••••••••••••••••••••••• : System Setup : 1
: Patches :
160 Preset Patches, 64 User Patches
'Memory Card(M-512E) ••••••••••••••••••• : System Setup : 1
: Patches : 64 Patches
'Effects•••••••••••••••••••••••••••••••••••••••••••••• : Moduration, Delay, Reverb, Equalizer
'Output
[MIX OUT]•••••••••••••••••••••••••••••••••••••••••• : Normal Output Level :
-10dBm(at Balanced use), -16dBm(at Unbalanced use)
: Output Impedance : 600 Ohm(at Balanced use),
300 Ohm(at Unbalanced use)
: Output Noise Level : Less than -84dBm
(0dBm=0.775Vrms)
[GUITAR OUT]•••••••••••••••••••••••••••••••••••• : Normal Output Level : -20dBm
: Output Impedance : 2k Ohm
'Display••••••••••••••••••••••••••••••••••••••••••••• : LED : 7segments, 3lines(LED)
: LCD : 160 x 64 Dots(backlight)
'Power Supply •••••••••••••••••••••••••••••••••••• : AC100V, 117V, 230V, 240V
'Current Draw••••••••••••••••••••••••••••••••••••• : 230mA
'Demensions •••••••••••••••••••••••••••••••••••••• : 19-7/8(W) x 11-5/8(D) x 3(H)inches
: 504(W) x 293(D) x 76(H)mm
'Weight•••••••••••••••••••••••••••••••••••••••••••••• : 101lbs6oz / 4.7kg
'Accessories •••••••••••••••••••••••••••••••••••••• : Owner's Manual Set(Japanese) : PNo.71128356
: Owner's Manual Set(English) : PNo.71129578
AC Cord 100V : PNo.23495112
AC Cord 117V : PNo.13499109
AC Cord 230V : PNo.13499221
AC Cord 230V E : PNo.13499221
AC Cord 240V A : PNo.13499222
EURO Converter PLUG ECP01-5A(230VE ONLY) : PNo.00905234
GK Connecting Cable (C-13A :5m) : PNo.00349067
'Options : Synthsizer Driver GK-2A
GK Connecting Cable (C-13B :10m)

2
LED SEL5221S TH8F
(00569289)
7 SEG. LED LB-603VP
(15029567)
DISPLAY COVER
(00568889)
LED
SLR-342VR3F
(00785856)
KEYTOP
6AAPA0187A
(00568867)
SWITCH PEDAL
(22180605)
ESCUTCHEON 222-321
(22220321)
TOP PANEL
(01568612)
BOTTOM CHASSIS
(01673445)
JACK NUT 2
(22150756)
JACK
HLJ7101-01-3010
(13449283)
GK SOCET
TCS5093-10-4152
(00564556) JACK
HLJ4336-01-3080
(13449287)
MIDI JACK
YKF51-5048
(13429676)
YKB21-5227
(00120434)
JACK
HLJ7001-01-3010
(13449284)
CARD HOLDER
F C-ESCT MX1H BLK
(22225374)
POWER SWITCH
EST206B 5A125V
(13149125) FOOT BASE 235-312
(22350312)
AC INLET
100V, 117V
CM-11 18A/250V/3P
(13429718)
230V, 240V
CCT 2102-0201 2.5A/250V/2P
(00128789)
DISPLAY UNIT
DMF-50374NYU-LY
(00568989)
KNOB
D R-KNOB L BLK 248-303
(22485303)
PEDAL LABEL
PANEL 1
(00568901)
PEDAL LABEL
PANEL 2
(00568912)
PEDAL LABEL
PANEL 3
(00568923)
PEDAL LABEL
PANEL 4
(00568934)
PEDAL LABEL
PANEL BANK DOUN
(00568945)
PEDAL LABEL
PANEL BANK UP
(00568956)
KNOB
M R-KNOB LF BLK/LCG
(01348023)
LOCATION OF CONTROLS
VG-8EX
Jul, 1998

3
1
d
f
2
4
5
3
e
67
8
9
11
12
10
13
14
16
17
19
20
18
21
22
23
24
26
27
25
28
29
15
30
c
d
a
e
b
h
i
f
j
c
31
h
c
e26
e
h
hg
EXPLODED VIEW
[PARTS]
No. PART No. PART NAME
q01673445 Bottom Chassis
w01568612 Top Panel
‰e70450045 Main Board Assy (PCB 00568278)
r70451690 Power Board Assy (PCB 00568289)
t70450023 Panel Board Assy (PCB 00567712)
y71128389 R.Encoder Board Assy (PCB 00568201)
u70451678 Volume Board Assy (PCB 00568234)
i70451656 LED Board Assy (PCB 00568189)
o70451689 Foot SW Board Assy (PCB 00568256)
!0 00568989 DMF-50374NYU-LY
!1 22225374 F C-ESCT MX1H BLK (Card Holder)
!2 00568889 Display Cover
!3 01348023 M R-KNOB LF BLK/LCG (Volume Knob)
!4 22485303 D R-KNOB L BLK 248-303 (Rotaly Encoder Knob)
!500784534 Pot Dust Cover
!6 00677412 SW Cover
!7 00677401 Insulating Sheet
!8 22220321 Escutcheon 222-321
!9 22180605 Switch Pedal
@0 22170103 Support Spring (for Switch Pedal)
@1 00568867 Key Top 6AAPA0187A
@2 00784523 VR Holder
@3 00671445 Clip Clamp (Wiring Holder)
@4 13149125 Power Switch EST206B 5A/125V
@5 22453551N0TRANSFORMER 100V
22453552C0TRANSFORMER 120V
22453553D0TRANSFORMER 230V/240V
@6 13429718 CM-11 18A/250V/3P
AC Inlet(100V,117V)
00128789 CCT 2102-0201 2.5A/250V/2P
AC Inlet(230V,240VE,240VA)
@7 00231434 Inlet Holder
@8 00673934 WIRING 11 (AC Inlet <--> Chassis)
@9 22150756 Jack Nut 2
#0 22350312 Base 235-312
#1 40129301 Rubber Foot #35 (for Switch Pedal)
[SCREW]
A17048154 M9 Washer ZC
B17048153 M9 Nut Thin Type ZC
C40012512 3x6mm Binding Head S-tite ZC
D40011745 M4 Spring Nut ZC
E40011101 3x8mm Binding Head B-tite BZC
F40011312 3x8mm Binding Head P-tite BZC
G40011302 3x8mm Single SEMS BZC
H40011090 3x6mm Binding Head B-tite BZC
I40011278 3x8mm Binding Head P-tite ZC
J17048155 2x4mm Binding Head B-tite ZC
!
!
!
VG-8EX
Jul, 1998

1 2 3 4 5 6 7 8 9 10111213141516171819202122232425262728
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
4
BLOCK DIAGRAM
CIRCUIT DESCRIPTION
String vibrations induced to GK-2A pickup are level
adjusted at the input analog circuit and fed to the A/D
converter (ICs 50-52) which outputs the digital equivalents
to the gate array IC22. From IC22, waveform data is sent
to CSP1 IC24 and CSP2 IC25 where waveform data is
modified as desired. From IC22, pitch and envelope data
are sent to DSP IC23.
ICs 23, 24 and 25 return the processed data back to gate
array IC22 from which data are sent to DAC IC54 and
then routed to analog singal output circuiuts.
The CPU IC1 directs CSP1 and CSP2 and performs other
controls on LCD, LED, switches, memory card, VALUE
dial, expression pedal, and the like.
System/patch parameters are stored in the battery backed
up SRAM IC63.
Flush memory IC62 stores main program and preset
patches. These data are updated upon performing MIDI
revision procedure.
VG-8EX
Jul, 1998

NOTE:The parts marked # are new (initial parts)
CASING
# 01568612 Top Panel
00568889 Display Cover
22350312 Foot Base 235-312
22225374 F C-ESCT MX1H BLK (Card Holder)
22220321 Escutcheon 222-321
22180605 Switch Pedal
22170103 Support Spring (for Switch Pedal)
40129301 Rubber Foot #35 (for Switch Pedal)
CHASSIS
# 01673445 Bottom Chassis
00784523 VR Holder
KNOB, BUTTON
00568867 Key Top 6AAPA0187A (Power Switch)
22485303 D R-KNOB L BLK 248-303 (Rotaly Encoder)
01348023 M R-KNOB LF BLK/LCG (Volume)
SWITCH
13149125 EST206B 5A/125V Power Switch
13129772 SKQEAA
JACK, SOCKET
00564556 TCS5093-10-4152 GK IN JK4
13429676 YKF51-5048 MIDI IN/OUT JK1
13449287 HLJ4336-01-3080 Dual Stereo Jack JK9
13449283 HLJ7101-01-3010 Monaural Jack JK5.JK6.JK7
13449284 HLJ7001-01-3010 Stereo Jack JK2.JK8
00120434 YKB21-5227 Stereo Jack JK4
13429718 CM-11 18A/250V/3P AC Inlet(100V/117V)
00128789 CCT 2102-0201 2.5A/250V/2P AC Inlet(230V/240V)
DISPLAY UNIT
00568989 DMF-50374NYU-LY LCD UNIT
PCB ASSY
‰70450045 Main Board Assy (PCB 00568278)
Note: Only Main Board "VG-8 Ver.1.**" will be supllied from service center.
Be sure to execute the "SYSTEM VERSION UP" when you use for "VG-8EX"
70450023 Panel Board Assy (PCB 00567712)
70451656 LED Board Assy (PCB 00568189)
# 71128389 R.Encoder Board Assy (PCB 00568201)
70451678 Volume Board Assy (PCB 00568234)
70451689 Foot SW Board Assy (PCB 00568256)
70451690 Power Board Assy (PCB 00568289)
Note: Replacement Main Board Assy does not include the Lithium Battery. Because lithium battery does not use
for the back-up of factory presets. Order proper the lithium battery separately if necessary.
00238990 CR2032 Lithium Battery
00238990 CR2032 Lithium Battery
IC
# 01122512 uPD70433GD-12-5BB CPU
15239222 TC140G12AF-0061 Gate Array
00900812
RA03-002(TC170C110AF-002) Custom DSP
00564523 TMP320P16PGL Custom DSP
15229848 uPD65005GF-062-3B8 Card Gate Array
15199944 SED1335F0B LCD Controller
# 01670201 28F400B5-B60 4M Flash Memory (Programed,only for VG-8EX)
01123289 SRM2B256SLMX55 256K SRAM
00128890 HY6264ALJ-70 64K SRAM
# 01342990 LH64256CK-50 1M DRAM
00343556 LC7886MN-TRM A/D Convertor
00232567 PCM69AU-1 D/A Convertor
15289105 uPC4570G2 Dual Operational Amplifier
15189261 M5218AFP-600E Dual Operational Amplifier
00349023 NJM062M Dual Operational Amplifier
15289123 M51953AFP-600C Reset Controller
00673812 ICL7660SCBA DC-DC Convertor
15259109 TC4053BF Triple 2ch Multiplexer
15259110 TC4066BF Quad Analog Switch
00564545 TC74VHC04F Hex Inverter
00567534 TC74VHC138F Decoder
00236845 TC74VHC245F Octal Bus Transceiver
00564534 TC74VHC574F Octal D-Type Flip-Flop
15259708T0 TC74HC08AF Quad 2-Input AND Gate
15259720T0 TC74HC74AF Dual D-Type Flip-Flop
15259823T0 TC74HC574AF Octal D-Type Flip-Flop
15259869T0 TC74HC4075AF Triple 3-Input OR Gate
15249116T0 TC7W00F-TE12L Dual 2-Input NAND Gate
00232645 TC7W14F-TE12L Triple Schmitt Inverter
00671878 TC7SH86F-TE85L Single EX-OR Gate
15289125 PC410 Photo Coupler
15199173 M5291P Switching Regulator IC
15199294 AN7705F +5V Voltage Regulator
00569023 AN7807F +7V Voltage Regulator
00569034 AN7907F -7V Voltage Regulator
TRANSISTOR
# 01568890 2SA1931
15309101 2SA1037KR-T146
15319101 2SC2412KR-T146
15329507 DTA114EK-T146
15329503 DTA124EK-T146
15329510D0 DTC144EK-T146
15329536 RN1442-TE85L
15149134 TD62785P Transistor Array
00019112 TD62381P Transistor Array
DIODE
15339126 RB471E-T149 Shottky Diode
15039178 RK-33 Shottky Diode
15339105 DAN202K-T146 Diode Array
15339108 DA204K-T146 Diode Array
# 01568901 GBPC102 Bridge Diode
15039172
S4VB20-4001L15 3.9A/200V Bridge Diode
00569289 SEL5221S TH8F LED(RED) D21.D22.D23 on PNB
00785856 SLR342VR3F LED(RED) D24.D25 on PNB
15029567 LB603VP 7-Segments LED(RED)
RESISTOR
# 01120267 RSSX 1/2 0.22 OHMJ 0.22ohm 1/2W
CAPACITOR
00568301 SRG25VB2200 2200µF/25V
00568312 SRG16VB2200 2200µF/16V
00568323 10SA100M 100µF/10V OS-CON
00127301 LLA50VB1 1µF/50V Low Leakage
ROTARY ENCODER
01124478 EC16B24104 L=15 Rotary Encoder
POTENTIOMETER
13289202 RK14K12D 10KB Volume
INDUCTOR
12449268 BL02RN2-R62T2-F EMI Filter
13529105M1 DSS310-55D223S EMI Filter L206 on PWB
12449427 HP-011Z Choke Coil L207 on PWB
CRYSTAL
# 01568889 MA-406 8MHz TE24 X2 on MB
00901912 MA-406 24.576MHz TE24 X1 on MB
01342145 MA-406 25MHz TE24 X3 on MB
00564590 SG-531PH 35MHz Oscillator X4 on MB
15299218 SG-531YH 65.152MHz Oscillator X5 on MB
CONNECTOR
13369663 S3B-PH-K-S CN3 on REB
13369504 B8B-PH-K-S CN6 on MB
13369564 B12B-PH-K-S CN4 on MB
13369563 B14B-PH-K-S CN3 on MB
13369562 B15B-PH-K-S CN5 on MB
13369667 S7B-PH-K-S CN4 on PNB
13369668 S8B-PH-K-S CN8 on VRB
13369675 S15B-PH-K-S CN5 on LDB
13369593 B5B-XH-A CN2 on MB
13369556 B8B-XH-A CN7 on MB
13429233 7508095A Card Connector CN1 on MB
13439439 5569-06A1 CN201 on PWB
WIRING
00568167 WIRING 1 CN1 on PNB
00568178 WIRING 2 CN2 on PNB
00568190 WIRING 3 CN6 on PNB
00568267 WIRING 4 CN101 on FSB
00568223 WIRING 5 CN7 on PNB
00568334 WIRING 6 CN202 on PWB
00568345 WIRING 7 CN203 on PWB
00568990 WIRING 8 LCD <--> MB
00569012 WIRING 9 VRB <--> MB
00673912 WIRING 10 AC Inlet <--> AC Switch
00673934 WIRING 11 AC Inlet <--> Chassis
TRANSFORMER
22453551N0 TRANSFORMER 100V
22453552C0 TRANSFORMER 120V
22453553D0 TRANSFORMER 230V/240V
BATTERY
00238990 CR2032 Lithium Battery
SCREW
40011090 3x6mm Binding Head B-tite BZC
40011101 3x8mm Binding Head B-tite BZC
40011312 3x8mm Binding Head P-tite BZC
40011278 3x8mm Binding Head P-tite ZC
40012512 3x6mm Binding Head S-tite ZC
17048155 2x4mm Binding Head B-tite ZC (for LCD unit)
40011302 3x8mm Single SEMS BZC
17048153 M9 Nut Thin Type ZC
17048154 M9 Washer ZC
40011745 M4 Spring Nut ZC
MISCELLANEOUS
00568901 Pedal Label(1)
00568912 Pedal Label(2)
00568923 Pedal Label(3)
00568934 Pedal Label(4)
00568945 Pedal Label(BANK DOWN)
00568956 Pedal Label(BANK UP)
22150756 Jack Nut 2
12569420 CR2032 Battery Holder
00677412 SW Cover
00784534 Pot Dust Cover
00891423 LED Spacer
00677401 Insulating Sheet
00231434 Inlet Holder
00671445 Clip Clamp (Wiring Holder)
00568356 Heat Sink PR1616-25-PB
17048151 Radiation Sheet 2067A-5051
40016378 Rag Terminal TER61-0171
00673478 Packing Case
00673467 Pad (1set = L,R 2pieces)
00789389 Pad C (top pad)
ACCESSORIES
# 71128356 Owner's Manual Set Japanese
# 71129578 Owner's Manual Set English
23495112 DC-015-J01 100V
13499109 UC-909-J06 117V
13499221 EC-511-E07 230V/230VE
13499222 SC-078-J02 240V A
00905234 EURO COVERTER PLUG ECP01-5A (230VE ONLY)
00349067 C-13A(SMK) GR Cable 5m(13P)
OPTIONS
******** C-13B GR Cable 10m(13P)
******** GK-2A GUITAR PICKUP
PARTS LIST
5
VG-8EX
Jul, 1998
SAFETY PRECAUTIONS:
The parts marked have
safety-related characteristics.
Use only listed parts for
replacement.
!
CONSIDERATIONS ON PARTS ORDERING
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.
MB ----->Main Board Assy. REB -----> Rotary Encoder Board Assy. PWB ----->Power Board Assy.
PNB ----->Panel Board Assy. VRB ----->Volume Board Assy.
LDB ----->LED Board Assy. FSB -----> Foot Switch Board Assy.
!
!
!
!
!
!
!
!
!
!
!
Note: Consider about the natural environment carefully before through the old lithium battery away when
you exchange to the new one.

6
TEST MODE
CAUTION
Before entering the test mode, be sure to save the user
data referring to section, “Data save and load”.
'Tools required
MIDI cable××××××××××××××××××××××××××××××××××××××××××××××(for MIDI test)
EV-5 or FV-300L ×××××××××××××××××××××××××××××××××××
(for EXP pedal test)
FS-5U (2 units)×××××××××××××××××××××××××××××××××××××× (for EXT switch test)
PCS-31 (branching cable for FS-5U) ×××× (for EXT switch test)
Guitar with GK-2A (or GK-2 or GC-10) ××(for GK test)
C-13A (GR cable)××××××××××××××××××××××××××××××××××(for GK test)
M-512E (RAM card)××××××××××××××××××××××××××××××(for RAM test)
Headphones (or monitor speaker)××××××(for GK test)
Oscilloscope×××××××××××××××××××××××××××××××××××××××××××(for LINE test)
'Test Items
1. LED test
2. Switch test
3. Dial test
4. EXP pedal test
5. LCD test
6. EXT switch test
7. Battery test
8. MIDI test
9. RAM test
10. GK test
11. CSP test
12. LINE test
'Entering/exiting test mode
'Entering the test mode
While simultaneously pressing [PLAY], [PAGE] and
[SYSTEM] buttons, turn power on.
LCD will show “JIG MODE” screen on which the
system revision number is displayed.
If necessary, adjust LCD contrast by using VALUE
dial (contrast setting can be made only while in “JIG
MODE” screen).
Press [F1] and the LCD changes screen to “JIG
MENU 1”.
'The JIG MENU screen has three pages: “JIG MENU
1”, “JIG MENU 2” and “JIG MENU 3”. Pages can be
switched by pressing [PAGE] button.
CAUTION
This test mode uses “JIG MENU 1” and “JIG MENU 2”
only.
Do not use “JIG MENU 3” which is invalid while in the
test mode.
'Exiting test mode
Simply turn off power.
'Starting/ending a test, general
'Starting a test
In a “JIG MENU” screen, press function key ( [F1] -
[F6]) to select the specified test.
'Ending the test
Press [SYSTEM] button and the LCD returns back
to “JIG MENU” screen.
'After entring the test mode
[ 1 ] LED test
●Purpose:
Test all LEDs by turning them on and off.
●Test steps:
1. Press [PAGE] button. “JIG MENU 1” screen
will appear.
2. Press [F1] “LED” and the screen changes to
“LED Check”.
The screen looks like Fig. 1.
3. Press [F1] “ALL”.
Verify that all panel LEDs are lighting.
4. Press [F3] “SEQ”.
All LEDs are turned on and off, but only one at
a time.[F5] button adjusts the on period of
each LED.
Simultaneously lighting 2 or more LEDs show
error condition.
If error:
Check IC1, IC2 and CN1 of panel board; and LED
board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 1” screen.
[ 2 ] Switch test
●Purpose:
Test panel switches and foot switch.
●Test steps:
1. Press [PAGE] button. “JIG MENU 1” screen
will appear.
2. Press [F2] “KEY” and the screen changes to
“KEY Check”.
The screen shows switch layout.
(Fig.1)
VG-8EX
Jul, 1998

Jul, 1998
VG-8EX
7
3. Press panel switches and foot switches one by
one.
The switch pressed is marked with black box
on the screen as shown in Fig.2.
Releasing the switch enlarges the box. Make
sure that the mark appears only for the switch
being tested.
If two or more switches are activated and
deactivated at the same time, LCD will show
error message as shown in Fig.3.
If error:
Check switch matrix on panel board and foot
switch board.
●To end the test:
The last switch tested will automatically return the
screen to “JIG MENU 1”.
To pause the test in the middle, turn VALUE dial.
“JIG MENU 1” screen will appear.
[ 3 ] Dial test
●Purpose:
Test VALUE dial.
●Test steps:
1. Press [PAGE] button. “JIG MENU 1” screen
will appear.
2. Press [F3] “DIAL” and the screen changes to
“DIAL Check”.
The screen looks like Fig. 4.
3. Turning VALUE dial, verify the movement
direction of black boxes shown in Fig. 4.
CW: right
CCW: left
If error:
Check R. ENCODER board and IC11 of main
board.
●To end the test:
Press [SYSTEM] and the LCD will return to “JIG
MENU 1” screen.
[ 4 ] EXP pedal test
●Purpose:
Test expression pedal.
●Test steps:
1. Connect EV-5 to EXP PEDAL socket.
2. Press [PAGE]. “JIG MENU 1” screen will
appear.
3. Press [F4] “EXP.PDL” and the screen changes
to “EXP PEDAL Check”.
4. Fully swing EV-5. “EXP PEDAL Value” on the
screen (Fig. 5) should read 0 through 127.
If error:
Check JK3 and associated components on main
board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 1” screen.
[ 5 ] LCD test
●Purpose:
Test all LCD dots and contrast.
●Test steps:
1. Press [PAGE] button. “JIG MENU 1” screen
will appear.
2. Press [F5] “LCD” and the screen changes to
“LCD Check”.
3. Adjust LCD to most convenient contrast by
turning VALUE dial.
(Fig.2)
(Fig.3)
(Fig.4)
(Fig.5)

8
Press [F1] “WHITE”. Verify that the all screen
dots are white.
(If no good, see “If error” below.)
Press [F3] “BLACK”. The all dots turn black.
(If no good, see “If error” below.)
Press [F5] “MOSAIC”. LCD shows chekered
pattern as shown in Fig.6.
(If no good, see “If error” below.)
Press [F6] “TEST”. VRAM (IC6) is tested and
the result is displayed on the screen.
Contrast: Turn VALUE dial CW and CCW and
verify smooth contrast change.
(If no good, see “If error” below.)
If error:
During the test [F1], [F3] or [F5]: check ICs 3 and
6 and CN5 on main board.
During the test [F6]: check IC6 on main board.
During the Contrast test: check IC19 and
associated components on main board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 1” screen.
[ 6 ] EXT switch test
●Purpose:
Test EXT switch.
●Test steps:
1. Connect two FS-5Us to EXT SWITCH socket
through PCS-31 cable.
Slide PORALITY switch on FS-5U toward socket.
2. Press [PAGE]. “JIG MENU 1” screen will appear.
3. Press [F6] “EXT.SW”. The screen changes to
“EXT SWITCH Check” and shows two FS-5Us.
Without pressing FS-5Us, verify that the top of
switches on the screen are black as shown in
Fig. 8.
4. Press the FS-5U connected to the red plug of
PCS-31 cable and verify that the SW 2 on the
screen is turned white (Fig. 9).
5. Press the FS-5U connected to the white plug of
PCS-31 cable and verify that the SW 1 on the
screen is turned white (Fig. 10).
If error:
Check JK2 and associated components on main
board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 1” screen.
[ 7 ] Battery test
●Purpose:
Test the voltage of internal battery and memory
card battery; and write protect switch of the card.
●Test steps:
1. Insert the memory card (w/battery) into
MEMORY CARD slot.
(Fig.6)
(Fig.7)
If good, “LCD Check OK” (Fig. 7)
If no good, “LCD Error XXXX (XXXX:
address at which the error is found)
(See “If error” below.)
VG-8EX
Jul, 1998
(Fig.8)
(Fig.9)
(Fig.10)

Jul, 1998
VG-8EX
9
2. Press [PAGE] button. “JIG MENU 2” screen
will appear.
3. Press [F1] “BATTERY” and the screen
changes to “BATTERY Check”.
The screen shows the battery voltages on the
bar graphs and the test results (OK or NG) as
shown in Fig. 11.
4. While switching the write protect switch of the
card, verify the correct message on the screen:
“CARD Protect OFF (ON)”.
If error:
VG-8EX battery NG: check BT1, IC18 and
associated components of main board.
Card battery NG: check the battery and IC2, CN1
and associated components of main board.
Protect switch: check IC2, CN1 and associated
components of main board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
[ 8 ] MIDI test
●Purpose:
Test MIDI IN and MIDI OUT circuits of VG-8EX
●Test steps:
1. Hook up MIIDI IN and MIDI OUT of VG-8EX
through the MIDI cable.
2. Press [PAGE] button. “JIG MENU 2” screen
will appear.
3. Press [F2] “MIDI” and the screen changes to
“MIDI Check”.
4. Press [F1] “START”.
The screen will show the test result.
If good: “MIDI Check OK”
If no good: “MIDI Check Error”
If error:
Check IC21 and IC14 and associated
components on main board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
[ 9 ] RAM test
●Purpose:
Test SRAM IC63 and memory card.
●Test steps:
1. Insert the memory card (M-512E) into
MEMORY CARD slot.
2. Press [PAGE] button. “JIG MENU 2” screen
will appear.
3. Press [F3] “RAM” and the screen changes to
“RAM Check”.
4. Press [F1] “RAM” to start the test of SRAM
(IC63).
The screen will show the test result (Fig. 12):
5. With the write protect switch at OFF, press [F3]
“CARD” to start the test of memory card.
The screen will show the test result (Fig. 13):
If the protect switch is ON, the test won't start
and LCD will display “Protected” for several
seconds.
If error:
RAM Error: check IC63 and associated
components of main board.
Card Error: check IC2 and CN1 and associated
components of main board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
[ 10 ] GK test
●Purpose:
Test GK IN circuit.
●Test steps:
1. Connect the guitar (with GK-2A or GK-2) or
GC-10 to GK IN socket thruogh the C-13A
cable.
(Fig.11)
(Fig.12)
If good: “RAM Check OK”
If no good: “RAM Error XXXX” (XXXX
= address at which error is found)
(Fig.13)
“Card Check OK”
“Card Error XXXX” (XXXX = address
at which error is found)

10
2. Press [PAGE] button. “JIG MENU 2” screen
will appear.
3. Press [F4] “GK” and the screen changes as
shown in Fig. 14.
4. On the GK-2A, turn [SYNTH VOL] from CCW
to CW and verify that “Vol” bar graph on the
screen changes from 00 to 7F.
5. Repeatedly press [S1] and [S2] on GK-2A and
verify that “S1=” and “S2=” on the top line of
the screen switch between “ON” and “OFF”.
6. Play the guitar and check level change on each
string bar graph on the screen (Fig. 15).
Pressing [F1] will change the input gain either
to 0.5, 1.0, 2.0 or 2.5. The current gain setting
is shown on the top line of the screen, e.g. “G
= 1.0” as shown in Fig. 15.
7. Connect headphones to PHONES socket.
Play the guitar and check the output sound.
Press [F3] button to change output mode. The
“L= “ on the top line of the screen showes the
current mode: “L=L” (LEFT),” L=R” (RIGHT),
“L=S” (STEREO).
Verify that the output sound match the output
modes.
If error:
Check: IC48, IC49, IC50, IC51, IC54, IC22 and
IC23 and associated components (analog input
circuit) on main board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
[ 11 ] CSP test
●Purpose:
Test CSP1 (IC24) and CSP2 (IC25).
●Test steps:
1. Press [PAGE] button. “JIG MENU 2” screen
will appear.
2. Press [F5] “CSP”.
3.
Press [F1] “SINGLE” and the following
memories will be test in sequence: CSP1
external memories (IC26, IC27, IC28); CSP1
internal memory; CSP2 external memories
(IC29, IC30, IC31); CSP2 internal memory. The
screen shows the results as shown in Fig. 16.
Note:
Pressing [F3] “LOOP” performs CSP test 100
times.
The number of tests is indicated by “COUNT” on
the top line of the screen (Fig. 17). COUNT will
stop increment as the test stops upon occurence
of error.
If error:
CSP1 ERAM: check IC24, IC26, IC27 and IC28
and associated components on main board.
CSP1 PRAM, CRAM and IRAM: check IC24 of
main board.
CSP2 ERAM: check IC25, IC29, IC30 and IC31
and associated components on main board.
CSP2 PRAM, CRAM, IRAM: check IC25 of main
board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
VG-8EX
Jul, 1998
(Fig.14)
(Fig.15)
(Fig.16)
(Fig.17)
”OK”: good, othewiser error
(see If error, below).

Jul, 1998
VG-8EX
11
[ 12 ] LINE test
●Purpose:
Test MIX OUT signals using oscilloscope.
Signal path: CSP1 (IC24) (sinewave) --> CSP2
(IC25) --> IC22 --> DAC (IC54) -> output analog
circuits --> MIX OUT
●Test steps:
1. Insert open STEREO plug into both MIX OUT
sockets. Turn VOLUME FCW.
2. Press [PAGE] button. “JIG MENU 2” screen
will appear.
3. Press [F6] “LINE”.
4. On the scope, oberve waveforms on TIP and
RING of the plug inserted into MIX OUT L.
Each sine wave level should be at approx. 5.2
Vp-p and opposite phase to the other.
5. Repeat step 4. for MIX OUT R.
6. Turn VOLUME fully CCW and verify that the
levels drop to 0V.
If error:
Check IC22, IC23, IC24, IC25 and IC54 on main
board.
●To end the test:
Press [SYSTEM] and the LCD returns to “JIG
MENU 2” screen.
TROUBLESHOOTING
7-SEG
LEDs turned on?
NO
LCD remains turned off
Check connections of CN3 and
CN5 on main board.
Pressing PLAY, turn
VALUE dial.
LCD turned on?
Check +5V, +7V and -7V
on main board.
Correct voltage?
Check voltage on pin 5 of
IC66 on main board.
NO
Turn off power and on
again.
YES
Check power board.
-12V?
Check main board : ICs 3, 6
and 19, and CN5 and
associated components.
NO
Check IC66 and associated
components on main board.
Correct connection?
Correct the connection.
*: Also refer to circuit diagram.
Check IC1 and associated components on
main board:
Pin 8 of IC1 should be at high level. If low,
check IC20.
Check X1 (connecting to IC1) for oscillation level.
Check pins 112, 114 and 115 of IC1 for
presence of pulse.
Check to make sure that VDD pin of IC1 is at 5V.
NO
YES
NO
YES
YES
YES
LOGIC TREE A

12
NO
No sound.
Check power board.
Go to test mode, "12. LINEOUT test"
Check IC57B pin 7 and IC57A pin 1 for approx.
5.2Vp.p sine wave.
Sine wave?
Check pins 14-16 of IC54 (PCM06AU)
on main board for presence of signal.
Signal present?
Go to test mode, "11. CSP test"
YES
YES
Pass the test?
Go to test mode, "10. GK IN test"
NO
*: Also refer to circuit diagram and test mode description.
NO
NO
YES
YES
Check main board: from ICs 17A and IC17B
to MIX OUT.
Check main board: ICs 54 (DAC), 55 and 56
and associated components.
Check main board: ICs 24-31 and associated
components.
Correct voltages?
Check +5V, +7V and -7V on main board.
Correct
level meter reading?
Check output pins of ICs 35, 40 and 45 for
presence of guitar signal.
YES
NO
Check main board: IC22 and associated
components; from IC22 output to ICs 24 and 25.
Signals present?
Check input to ICs 35, 40 and 45 of main board.
NO
YES
Check main board: From output of ICs 35, 40
and 45 to input of 22.
LOGIC TREE B
Jul, 1998
VG-8EX
DATA SAVE AND LOAD
1. Saving data onto backup memory card (M-512E)
(a) Saving user patches (UA11-UB84) and system data
to memory card
(1)Insert a memory card into MEMORY CARD slot
on VG-8EX
(2)Set the write protect switch on the card to off.
(3)Turn power on and press [SYSTEM] button.
(4)Press [F6] "CARD" to enter "Card Transfer" mode.
(5)Using [CURSOR] buttons, select "Function".
Using [VALUE] dial, select "VG-8EX -> CARD".
(6)Using [CURSOR] buttons, select "Target".
Using [VALUE] dial, select "Patch&System".
(7) Press [F1] "XFER". LCD will show:
"Are You Sure?" or "Format This Card. Are You
Sure?" (If not a VG-8EX format card)
(8)Press [F1] "OK". LCD will show "Completed".
(9)Set the write protect switch on the card to on and
pull out the card.
(b) Loading user patches (UA11-UB84) and system data
back to VG-8EX memory
(1)Insert the memory card into MEMORY CARD slot
on VG-8EX.
(2)Turn power on and press [SYSTEM] button.
(3)Press [F6] "CARD" to enter "Card Transfer" mode.
(4)Using [CURSOR] buttons, select "Function".
Using [VALUE] dial, select "CARD -> VG-8EX".
(5)Using [CURSOR] buttons, select "Target".
Using [VALUE] dial, select "Patch&System".
(6)
Press [F1] "XFER". LCD will show "Are You Sure?".
(7)Press [F1] "OK". LCD will show "Completed".
(8)Pull out the card.
2. Creating backup copy using bulk dump feature
(a)Trasferring user patches (UA11-UB84) and system
data from VG-8EX to a sequencer
Note: Use a sequencer having exclusive inforamtion
receive/record capability.
(1)Hook up VG-8EX MIDI OUT socket and
sequencer MIDI IN socket through theMIDI cable.
(2)<VG-8EX>
Turn on power and press [SYSTEM] button.
(3)<VG-8EX>
Press [F3] "MIDI" to enter "System MIDI" mode.
(4) <VG-8EX>
Using [CURSOR] buttons, select "Bulk Dump".
Using [VALUE] dial, select "Patch&System".

Jul, 1998
VG-8EX
13
SYSTEM VERSION UP
Important Notice !!
To perform SYSTEM VERSION UP in SERVICE MODE,
a VG8S-1 is necessary as a key.
But any VG8S-1 (even a used one) can be used for this
purpose.
'Tools required
MIDI sequencer (SMF-compatible)
MIDI cable
VG-8EX VER.UP. DISK (17048923)
VG8S-1
(1)Connect MIDI OUT socket of VG-8EX to MIDI IN
socket of the sequencer through the MIDI cable.
(2)Insert VG8S-1 (as a key) into the VG-8EX card
slot. While holding down the [SYSTEM] and
[WRITE] buttons, turn the power on.
(3)
The LCD will show "System expand. Are You Sure?".
Press [F3] buttton and select "MIDI".
(4)Insert VG-8EX VER.UP DISK into the sequencer
disk slot. Play VG1.MID, VG2.MID and VG3.MID
in that order.
(5)When all the received system data are
recognized, the LCD will show "Completed!
Please power off and remove card.".
(6)While holding down the [PLAY] and [SYSTEM]
buttons,turn the power on. Verify the VG-8EX
version number.
Now the system is revised.
While holding down both [PLAY] and [SYSTEM]
buttons, turn power on. The LCD will show the system
revision number.
(5)<Sequencer>
Set the sequencer ready to receive and record
exclusive information.
Start the recording. Wait for several minutes, and
then proceed to the next step.
(6)<VG-8EX>
Press [F1] "BULK". LCD will show "Sending...",
indicating the start of bulk data transfer.
(7)<VG-8EX>
When the bulk data is transferred, LCD will show
"Completed".
(8)<Sequencer>
Stop recording.
(9)Data saving is completed.
(b) Loading user patches (UA11-UB84) and system data
back to VG-8EX memory
(1)Hook up VG-8EX MIDI IN socket and sequencer
MIDI OUT socket through the MDI cable.
(2)<VG-8EX>
Turn on power.
(3)<Sequencer>
Send the backup data by playing the song
containing the VG-8EX backup data. Start with the
beginning of the song.
(4)<VG-8EX>
LCD will show "EXCL" at upper right on the screen.
(5)<VG-8EX>
When complete song data is received, LCD will
turn off "EXCL".
(6)Data loading is completed.
Important Notice!!
When replacing the backup battery or SRAM (IC63), take
the following initialization and sysyem version up
procedure after replacing.
CAUTION
This preset loading procedure erases user patches
(UA11-UB84) and system parameters. Save the user data
onto a memory card (M-512E) or a sequencer capable of
receiving and recording MIDI exlusive information.
For saving procedure, refer to DATA SAVE AND
LOAD. (P.12~13).
1. While holding down [F1], [F3] and [F5] simultaneously,
turn power on. The LCD will show "Memory Initialize".
2. Press [F6] "All" and the user patches and system
parameters are replaced with the factory settings.
3. LCD will show "Completed", indicating the end of
initialization.
LOADING THE FACTORY PRESENT DATA
While holding down these buttons simultaneously,
turn power on.
IDENTIFYING SYSTEM REVISION NUMBER
Roland VG-8EX
system version *.**

1 2 3 4 5 6 7 8 9 10111213141516171819202122232425262728
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
14
‰MAIN BOARD ASS'Y
ASSY 70450045
(pcb 00568278)
View from component side
VG-8EX
Jul, 1998
ADVARSEL!
Lithiumbatteri - Eksplosionsfare
ved fejlagtig håndtering
Udskiftning må kun ske med
batteri af samme fabrikat og type.
Lavér det brugte batteri tilbage til
leverandoren.
ADVARSEL!
Lithiumbatteri - Eksplosjonsfare.
Ved utskifting benyttes kun batteri
som anbefalt av apparatfabrikanten.
Brukt batteri returneres
apparatleverandøren.
VARNING!
Explosionsfara vid felakigt
batteribyte.
Använd samma batterityp eller en
ekvivalent typ som
rekommenderas av
apparattillverkaren.
Kassera använt batteri enligt
tabrikantents instruktion.
VAROITUS!
Paristo voi räjähtää, jos se on
virheellisesti asennettu.
Vaihda paristo ainoastaan
laitevalmistajan suosittelemaan
tyyppiin. Hävitä käytetty paristo
valmistajan ohjeiden mukaisesti.
For Nordic Countries
Apparatus containing
Lithium batteries

ADVARSEL!
Lithiumbatteri - Eksplosionsfare
ved fejlagtig håndtering
Udskiftning må kun ske med
batteri af samme fabrikat og type.
Lavér det brugte batteri tilbage til
leverandoren.
ADVARSEL!
Lithiumbatteri - Eksplosjonsfare.
Ved utskifting benyttes kun batteri
som anbefalt av apparatfabrikanten.
Brukt batteri returneres
apparatleverandøren.
VARNING!
Explosionsfara vid felakigt
batteribyte.
Använd samma batterityp eller en
ekvivalent typ som
rekommenderas av
apparattillverkaren.
Kassera använt batteri enligt
tabrikantents instruktion.
VAROITUS!
Paristo voi räjähtää, jos se on
virheellisesti asennettu.
Vaihda paristo ainoastaan
laitevalmistajan suosittelemaan
tyyppiin. Hävitä käytetty paristo
valmistajan ohjeiden mukaisesti.
For Nordic Countries
Apparatus containing
Lithium batteries
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
Jul, 1998
15
VG-8EX
‰MAIN BOARD ASS'Y
ASSY 70450045
(pcb 00568278)
View from foil side

1 2 3 4 5 6 7 8 9 10111213141516171819202122232425262728
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
16
MEMORY CARD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
7508-095A
VCC
V
D
D
1
2V
D
D
2
7
CA00 28
CA01 29
CA02 30
CA03 31
CA04 32
CA05 35
CA06 36
CA07 37
CA08 38
CA09 39
CA10 40
CA11 41
CA12 42
CA13 43
CA14 44
CMR 45
CWR 46
CCS 47
CRD 48
CD0 50
CD1 51
CD2 52
CD3 53
CD4 54
CD5 55
CD6 56
CD7 57
BATT 60
SENS 61
V
D
D
5
9
XCS
63
A14
16 A13
19 A12
20 A11
21 A10
22 A9
23 A8
24
AD6
4 AD5
5 AD4
6 AD3
7 AD2
8 AD1
9 AD0
10
XRD
15
NC
17 NC
18 NC
33 NC
34 NC
64
RCS
62
AD7
3
ALE
13 XWR
14
NC
1 NC
2
SEL
25 G
N
D
1
1
G
N
D
2
6
G
N
D
5
8
IC2
UPD65005G-062
C118
0.1u
VCC
AD14
AD13
AD12
AD11
AD10
AD9
AD8
R241
1k
1
2
3
Q22
2SA1037KR
VCC
1
23
Q23
DTC144EK
C108
0.1u
C114
0.1u
A7
A6
A5
A4
A3 VCC
VCC
D1
2 Q1 19
D2
3 Q2 18
D3
4 Q3 17
D4
5 Q4 16
D5
6 Q5 15
D6
7 Q6 14
D7
8 Q7 13
D8
9 Q8 12
CLK
11 OC
1
IC7
74VHC574
AD7
AD6
AD5
AD4
AD3
VCC
2
3
4
5
7
8
9
10
1
6
RA3
10kX8
+5VD
+5VD
DGND
DGND
DGND
1
2
3
4
5
CN2
B5B-XH-A
AD[0..19]
VCC
R230
4.7k
C102
0.1u
C101
0.1u
3 2
1
IC14A
74HC08
VCC
VCC
VCC
VCC
IN
-
3 GND 4
VCC 6
OUT 5
+
1 IC21
PC410
R1 220
R2
220
R3
220
C1
0.1u
C2
100u/10
12
3
Q1
DTA114EK
1
2
3
JK1A
YKF51-5048
4
5
6
JK1B L1
BL02RN2
L2
BL02RN2
21 3
D1
DA204K
+5VD
+5VD
DGND
DGND
LEDD3
LEDD2
LEDD1
LEDD0
MIDI
OUT
CN3
B14B-PH-K-S
R4
2.2k 21 3
D2
DA204K
VCC
R6
10
G
N
D
5
3
A23 107
A22 106
A21 105
A20 104
A19 103
A18 102
A17 101
A16 100
AD14 98
AD13 97
AD12 96
AD11 95
AD10 94
AD9 93
AD8 92
AD7 91
AD5 89
AD4 88
AD3 87
AD2 86
AD1 85
AD0 84
DEX 119
RAS 118
IORD 117
IOWR 116
RD 115
X1
11 X2
12
AD6 90
G
N
D
2
3
WRL 114
WRH 113
ASTB 112
BUSLOCK 2
RESET 8
WDTOUT 9
V
D
D
4
4
G
N
D
1
3
V
D
D
1V
D
D
1
0
CLKOUT
7
AD15 99
V
D
D
5
7V
D
D
7
4
A
V
D
D
6
4V
D
D
8
1
HLDAK 3
DMAAK0 77
DMAAK1 78
TCE0 79
OPEN 14
P07
22 P06
21 P05
20 P04
19 P03
18 P02
17 P01
16 P00
15
P16
30 P15
29 P14
28 P13
27 P12
26 INTP0
25 NMI
24
P25
36 P24
35 P23
34 P22
33 P21
32 P20
31
P36
43 RXD1
42 TXD1
41 P33
40 P32
39 RXD0
38 TXD0
37
P47
52 P46
51 P45
50 P44
49 P43
48 P42
47 P41
46 P40
45
P52
56 P51
55 P50
54
P77
73 P76
72
P71
67 P70
66
P81
76 P80
75
P75
71 P74
70
G
N
D
6
5
G
N
D
8
2
A
V
S
S
5
8
G
N
D1
0
9
A
V
R
E
F
6
3V
D
D
1
0
8
OPEN 120
TCE1 80
P73
69 P72
68
HLDRQ 4
POLL 6
ICL 111
D8/D16 110
ANI3 62
ANI2 61
ANI1 60
ANI0 59
ICH 83
READY 5
IC1
uPD70433GD-5BB
C5
0.1u
R5
220
C3
12p
C4
12p
X1
MA-406
25MHz
C103
0.1u
C104
0.1u
C105
220u/6.3
AD19
AD18
AD17
AD16
AD15
AD14
AD19
AD18
AD17
AD16
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
VCC
A1
2 B1 18
A2
3 B2 17
A3
4 B3 16
A4
5 B4 15
A5
6 B5 14
A6
7 B6 13
A7
8 B7 12
A8
9 B8 11
G
19 DIR
1
IC8
74VHC245
AD2
AD1
AD0
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
VCC
2
3
4
5
7
8
9
10
1
6
RA4
10kX8
C109
0.1u AD18
AD17
AD16
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
D7
D6
D5
D4
D3
D2
D1
D0
A2
A1
A0
A7
A6
A5
A4
VCC V
C
C
2
3
V
S
S
3
2
A17
3 A16
34 A15
35 A14
36 A13
37 A12
38 A11
39 A10
40 A9
41 A8
42 A7
4 A6
5 A5
6 A4
7 A3
8 A2
9 A1
10 A0
11 A-1
31
CE
12 WE
43
VPP 1
D14 29
D13 27
D12 25
D11 22
D10 20
D9 18
D8 16
D7 30
D6 28
D5 26
D4 24
D3 21
D2 19
D1 17
D0 15
V
S
S
1
3
OE
14
DU 2
PWD 44
BYTE 33
IC62
28F400B5-B
R254
10k
D7
D6
D5
D4
D3
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
VCC
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
CN1B
R249
10k
2
1
3
D26
DAN202K
R246 100k
R244
4.7k
R245 2.2k
A[0..7]
D[0..7]
AD[0..19]
VCC
11
13
12 IC14D
74HC08
VCC
6
3
4
5 IC17B
74HC4075
D2
D1
D0
AD154
3
IC9B
74VHC04
A3
A2
A1
A0
A[0..7]
D[0..7]
D7
D6
D5
D4
D3
D2
D1
D0
6
5
IC9C
74VHC04
VCC VCC
2
3
4
5
7
8
9
10
1
6
RA5
10kX8
2
3
4
5
7
8
9
10
1
6
RA6
10kX8
21 IC9A
74VHC04
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
2
3
4
5
7
8
9
10
1
6
RA1
10kX8
ENC A
ENC B
LEDD7
LEDD6
LEDD5
LEDD4
1
2
3
4
8
7
6
5
13
14
12
11
10
9
R9 10k
R232 10k
2
1
3
D22
DA204K
RS
MINT
GKS1
GKS2
VCC
VCC
EXT SW
C6 0.1u
R8 100
2
3
1
JK2
HLJ7001-01-3010
2 1
3
D23
DA204K
R231 100
C7 0.1u
1
2
3
Q2
2SA1037KR
VCC
VCC C97
0.1u
R263 4.7k
R7
4.7k
R18
4.7M
2
3
1
IC18A
NJM062M C115
0.1u
A
1 B
2 C
3
G1
6 G2A
4 G2B
5
Y0 15
Y1 14
Y2 13
Y3 12
Y4 11
Y5 10
Y6 9
Y7 7
IC10
74VHC138
AD18
AD17
AD16
VCC 21 3
D27
DA204K
R253
10k
XRD
XWR
RESET
XCS1
XCS2
XCS3
C121
0.1u
A12
2 A11
23 A10
21 A9
24 A8
25 A7
3 A6
4 A5
5 A4
6 A3
7 A2
8 A1
9 A0
10 OE
22 WE
27
D7 19
D6 18
D5 17
D4 16
D3 15
D2 13
D1 12
D0 11
CS2 26
NC 1
V
C
C
2
8
G
N
D
1
4
CE
20
IC6
HY6264ALJ-70
LD7
LD6
LD5
LD4
LD3
LD2
VCC
VA15 50
VA14 51
VA13 52
VA12 53
VA11 54
VA10 55
VA9 56
VA8 57
VA7 58
VA6 59
VA5 1
VA4 2
VA3 3
VA2 4
VA1 5
VCS 8
CD4 45
CD3 46
CD2 47
CD1 48
CD0 49
G
N
D3
6
D7
29 D6
28 D5
27 D4
26 D3
25 D2
24 D1
23 D0
22
RD
13 WR
14 CS
19
A0
20
RES
10
XG
17
VA0 6
V
D
D
2
1
YSCL 41
YD 40
YDIS 39
WF 38
LP 37
XSCL 35
XECL 34
XD0 33
XD1 32
XD2 31
XD3 30 NC
60 NC
12 NC
11
SEL2
15 SEL1
16
XD
18
VRD 9
VWR 7
CD7 42
CD6 43
CD5 44
IC3
SED1335F0B
C119
0.1u
C120
220u/6.3
D7
D6
D5
D4
D3
D2
D1
D0
A0
VCC
R243
47k
12 3
Q24
2SA1037KR
2
1
3
D25
DA204K
VCC
C179
0.1u
R242
47k
1
2
4
3
5
IC64
TC7SH86F
AD19
A0
VCC
VCCVCC
1
2
BT1
CR-2032
R20
10k
R19
4.7M
2 1
3
D3
DAN202K
8
4
6
5
7
IC18B
NJM062M
VCC
1
2
3
4
8
7
6
5
RA2
10kX4
VCC
SCAN3
SCAN2
SCAN1
SCAN0
SWD7
SWD6
SWD5
SWD4
SWD3
SWD2
SWD1
SWD0 4
3
2
1
12
11
10
9
8
7
6
5
CN4
B12B-PH-K-S
MUTE_S
R10
4.7k 12 3
Q16
DTC144EK
1
2
3
Q15
DTA124EK
R248
1M
GKVOL
VCC
VCC
VCC VCC R21
10k
C116
0.1u
89
IC9D
74VHC04
R17
10k
8
4
7
2
1
IC16A
TC7W00F
VCC
AD14
AD13
AD12
AD11
AD10
AD9
AD8
A7
A6
A5
A4
A3
A2
A1
A0
A14
1 A13
26 A12
2 A11
23 A10
21 A9
24 A8
25 A7
3 A6
4 A5
5 A4
6 A3
7 A2
8 A1
9 A0
10
D7 19
D6 18
D5 17
D4 16
D3 15
D2 13
D1 12
D0 11
V
C
C
2
8
G
N
D
1
4
OE
22 WE
27 CE
20
IC63
SRM2B256SLMX55
C117
0.1u
D7
D6
D5
D4
D3
D2
D1
D0
C13
20p
C14
20p
LD7
LD6
LD5
LD4
LD3
LD2
LD1
LD0
X2
MA-406
8MHz
LD1
LD0
LD[0..7] VCC
VCC
FLM
LP
CP
M
VADJ
VCC
VSS
VEE
D0
D1
D2
D3
DISP
LED A
LED K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R28
1k
CN5
B15B-PH-K-S2
1
3
D4
DA204K
R25
18k
R27 18k
VCC
ATT7
ATT6
ATT5
C107
0.1u
D1
2 Q1 19
D2
3 Q2 18
D3
4 Q3 17
D4
5 Q4 16
D5
6 Q5 15
D6
7 Q6 14
D7
8 Q7 13
D8
9 Q8 12
CLK
11 OC
1
IC13
74HC574
2 6
8
4
IC15B
TC7W14F
D7
D6
D5
VCC
VCC
C110
0.1u
R22
10k
D1
2 Q1 19
D2
3 Q2 18
D3
4 Q3 17
D4
5 Q4 16
D5
6 Q5 15
D6
7 Q6 14
D7
8 Q7 13
D8
9 Q8 12
CLK
11 OC
1
IC12
74HC574
1011
IC9E
74VHC04
3
6
5
IC16B
TC7W00F
D7
D6
D5
VCC
C12
0.01u
NC 8
VCC 7
OUT 6
C5
NC
1 NC
2 NC
3 GND
4
IC20
M51953AFP
71
IC15A
TC7W14F
C9
0.1u
R14
10k
3
2 45
6
1
IC11A
74HC74
11
12
1
09
8
1
3
IC11B
74HC74
VCC
VCC
EXT PEDAL C8
0.1u
R11
100k
R13
10k
R12
10k
4
2
3
1
JK3
YKB21-5227
VCC
R15
10k
ATT[0..11] ATT[0..11]
53
IC15C
TC7W14F
R16
10k
C10
0.01u C11 0.01u
C106
0.1u
6
5
4 IC14B
74HC08
8
10
9 IC14C
74HC08
VCC
VCC
VCC 9
1
2
8
IC17A
74HC4075
D4
D3
D2
D1
D0
C112
0.1u
10
13
12
11
IC17C
74HC4075
C111
0.1u
D4
D3
D2
D1
D0
ATT11
ATT10
ATT9
ATT8
VCC C113
0.1u
R23
1k
C15
10u/16
ATT4
ATT3
ATT2
ATT1
ATT0
VCC
R24
10k
R26
10k
VEE
VCC
8
4
6
5 7
IC19B
M5218AFP
2
3 1
IC19A
M5218AFP
4
2
5
4
2
5
S
S
DQ
Q
R
CK
DQ
Q
R
CK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
+5V
CA0
CA1
CA2
CA3
CA4
CA5
CA6
CA7
CA8
CA9
CA10
CA11
CA12
CA13
CA14
GND
GND
GND
MR
CWR
CCS
CRD
CD0
CD1
CD2
CD3
CD4
CD5
CD6
CD7
GND
VBB
SENS
‰MAIN BOARD ASS'Y (CPU BLOCK)
VG-8EX
Jul, 1998

q
ASA
ASC
ATT[0..11]
ASB
R255 1k
R256 1k
R257 1k
ATT[0..11]
8
4
6
5 7
IC37B
uPC4570G2
R48 100k_MF
C207 33p
+7V
R40
4.7k
R47
3.3k_MFR41
15k
1110
1
2IC36D
8 9
6
IC36C R46
3.3k_MF
ATT0
ATT1
+7V +2.5V
R35
18k
C152
0.1u
R39
4.7k
+7V
+7V
+7V
+5VA
2
3 1
IC32A
M5218AFP
C20
100u/10 R33 10k_MF
C21
220u/6.3
C22
0.1u
VI
1 G
N
D
2
VO 3
IC53
AN7705F
R32
10k_MF +2.5V
+7V +5VA
-7V
8
4
6
5 7
IC32B
M5218AFP
8
4
6
5 7
IC33B
uPC4570G2
C26
560p
C25
10u/16
R34
18k
+7V
-7V
8
4
6
5 7
IC34B
uPC4570G2
R36
18k
C27
560p
R55
18k
R37
10k
R38
3.3k_MF
R59
4.7k
C201
10u/16
-7V +2.5V
12
1
3IC36A
TC4066BF
R60
4.7k R61 15k
R67
3.3k_MF
C28
100p
4 3
5
IC36B
8
4
6
5 7
IC35B
uPC4570G2
R66
3.3k_MF
ATT2
ATT3
-7V
+2.5V
2
3 1
IC37A
uPC4570G2
R68 100k_MF
C208 33p
-7V
X1
13 X0
12
Y1
1 Y0
2
X14
Y15
Z4
A11
B10
C9
INH 6
VEE 7
G
N
D8
V
C
C
1
6
Z0
5 Z1
3
IC48
TC4053BF R53
100
R113
100
C155
0.1u +7V
D
G
N
D
1
3
F
O
R
M
7
ADIN1
1
ADIN2
23
A
V
D
D
3
A
G
N
D
1
9
VR1
4 VR2
21
A
G
N
D
2
4
LRCK 9
BCLK 10
DATA 11
TSTOUT 14
TEST1 15
TEST6 18
TEST4 17
TEST2 16
TEST5
20 TEST3
5
V
H
2A
V
D
D
6D
V
D
D
1
2I
F
D
A
8
V
L
2
2
IC50
LC7886M
C159
0.1u
C160
220u/6.3
C161
0.1u
C162
220u/6.3
43 5
12
D17
RB471E
43 5
12D30
RB471E
+5VA VCC
+5VA
AHLD
ABCK
AIN1
D
G
N
D
1
3
F
O
R
M
7
ADIN1
1
ADIN2
23
A
V
D
D
3
A
G
N
D
1
9
VR1
4 VR2
21
A
G
N
D
2
4
LRCK 9
BCLK 10
DATA 11
TSTOUT 14
TEST1 15
TEST6 18
TEST4 17
TEST2 16
TEST5
20 TEST3
5
V
H
2A
V
D
D
6D
V
D
D
1
2I
F
D
A
8
V
L2
2
IC51
LC7886M
C163
0.1u
C164
220u/6.3
C165
0.1u
C166
220u/6.3
43 5
12D31
RB471E
+5VA VCC
+5VA
C156
0.1u -7V
8
4
6
5 7
IC42B
uPC4570G2
R88 100k_MF
C209 33p
+7V
R80
4.7k R81 15k
R87
3.3k_MF
C32
100p
8 9
6
IC41C 1110 1
2IC41D
2
3 1
IC35A
uPC4570G2
R86
3.3k_MF
ATT4
ATT5
+2.5V
2
3 1
IC34A
uPC4570G2
R56
18k
C31
560p
R75
18k
R58
3.3k_MF
C153
0.1u
R57
10k
C202
10u/16
+7V
+2.5V
2
3 1
IC33A
uPC4570G2
C30
560p
C29
10u/16
R54
18kC23
0.1u C24 0.1u
C144
100u/10
C146
100u/10
C148
100u/10
TP1
RCS00000
+7V
8
4
6
5 7
IC38B
uPC4570G2
C34
560p
C33
10u/16
R74
18k
+7V
-7V
8
4
6
5 7
IC39B
uPC4570G2
R76
18k
C35
560p
R77
10k
R78
3.3k_MF
R79
4.7k
C203
10u/16
+7V
-7V +2.5V
R100
4.7k R101 15k
R107
3.3k_MF
C36
100p
4 3
5
IC41B 12 1
3IC41A
TC4066BF
8
4
6
5 7
IC40B
uPC4570G2
R106
3.3k_MF
ATT6
ATT7
+7V
-7V
2
3 1
IC42A
uPC4570G2
R108 100k_MF
C210 33p
-7V
R73
100
R133
100
43 5
12
D18
RB471E
AIN2
AIN3
D
G
N
D
1
3
F
O
R
M
7
ADIN1
1
ADIN2
23
A
V
D
D
3
A
G
N
D
1
9
VR1
4 VR2
21
A
G
N
D
2
4
LRCK 9
BCLK 10
DATA 11
TSTOUT 14
TEST1 15
TEST6 18
TEST4 17
TEST2 16
TEST5
20 TEST3
5
V
H
2A
V
D
D
6D
V
D
D
1
2I
F
D
A
8
V
L2
2
IC52
LC7886M
C167
0.1u
C168
220u/6.3
C169
0.1u
C170
220u/6.3
43 5
12
D19
RB471E
43 5
12D32
RB471E
+5VA VCC
+5VA
X1
13 X0
12
Y1
1 Y0
2
X14
Y15
Z4
A11
B10
C9
INH 6
VEE 7
G
N
D8
V
C
C
1
6
Z0
5 Z1
3
IC49
TC4053BF
R153
100
R93
100
C157
0.1u +7V
8
4
6
5 7
IC47B
uPC4570G2
R128 100k_MF
C211 33p
+7V
C40
100p
8 9
6
IC46C 1110 1
2IC46D
2
3 1
IC40A
uPC4570G2
R126
3.3k_MF
ATT8
ATT9
+2.5V
2
3 1
IC39A
uPC4570G2
R95
18k
R96
18k
C39
560p
R97
10k
R98
3.3k_MF
C154
0.1u
R99
4.7k
C204
10u/16
+7V
+2.5V
2
3 1
IC38A
uPC4570G2
C38
560p
C37
10u/16
R94
18k
C145
100u/10
C147
100u/10
C149
100u/10
-7V
GK IN
8
4
6
5 7
IC43B
uPC4570G2
C42
560p
C41
10u/16
R114
18k
+7V
-7V
8
4
6
5 7
IC44B
uPC4570G2
R115
18k
R116
18k
C43
560p
R117
10k
R118
3.3k_MF
R119
4.7k
C205
10u/16
+7V
-7V +2.5V
12
1
3IC46A
TC4066BF
R120
4.7k R121 15k
R127
3.3k_MF
C44
100p
4 3
5IC46B
8
4
6
5 7
IC45B
uPC4570G2
R146
3.3k_MF
ATT10
ATT11
+7V +2.5V
-7V
2
3 1
IC47A
uPC4570G2
R148 100k_MF
C212 33p
-7V C158
0.1u -7V
GTSIG
GKVOL
GKS1
GKS2
R157
2.2k
1
2
3 Q3
DTA114EK
VCC
R154
47k
VCC VCC
R140
4.7k R141 15k
R147
3.3k_MF
C48
100p
2
3 1
IC45A
uPC4570G2
+2.5V
2
3 1
IC44A
uPC4570G2
R135
18k
R136
18k
C47
560p
R137
10k
R138
3.3k_MF
R139
4.7k
C206
10u/16
+2.5V
2
3 1
IC43A
uPC4570G2
C46
560p
C45
10u/16
R134
18k
SIG1
SIG2
SIG3
SIG4
SIG5
SIG6
GT.SIG
SY VOL
NC
S1
S2
+V
-V
1
2
3
4
5
6
7
8
9
10
11
12
13
JK4
TCS5093-10-4152
C150
100u/10_OS
+7V
C151
100u/10_OS
-7V
C53
0.1u
C51
0.1u
R155
4.7k
C49
1u/50
R156
4.7k
2
1
3
D20
DA204K
R158
2.2k
1
2
3 Q4
DTA114EK
VCC
AG
AG
AG
4
AG
AG
AG
AG AG
AG
AG
AG
AG
AG
AG AG
AG AG
3 2 1
87 6 5
12 11 10 9
13
FRONT VIEW
AG
AG
AG
AG AG
AG
AG
AG AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U17
VG-8EX
Jul, 1998
‰MAIN BOARD ASS'Y (ADC BLOCK)

AD[0..19]
A[0..7]
D[0..7]
XRD
XWR
RESET
MINT
XCS1
XCS2
XCS3
GKS1
GKS2
GKVOL
AD[0..19]
RS
ATT[0..11]
MUTE_S
VEE
VPP
A[0..7]
D[0..7]
DBCK
XSF1
LRCK
DAD1
AIN3
AIN2
AIN1
RESET
MINT
XCS1
XWR
XRD
D[0..7]
A[0..7]
RS CSS[0..6]
CSR[0..5]
SYCSP
AHLD
ABCK
ASA
ASB
ASC
A[0..7]
D[0..7]
XRD
XWR
XCS2
XCS3
AD[0..19]
SYCSP
CSR[0..5]
CSS[0..6]
GA BLOCK
ATT[0..11]
CPU BLOCK CSS[0..6]
CSR[0..5]
CSP BLOCK
LRCK
DAD1
DBCK
XSF1
GTSIG
MUTE_S
VEE
VPP
GKVOL
GKS1
GKS2
ATT[0..11]
GTSIG
ASA
AIN3
AIN2
AIN1
ABCK
AHLD
ASC
ASB
ADC BLOCK DAC BLOCK
q
r
w
e
C18
10p
A[0..7]
C19
10p
R31
1M
A[0..7]
X3
MA-406
24.576MHz
C122
0.1u
C123
220u/6.3
VCC
7
3
44
45
46
47
48
72
71
65
64
63
62
61
60
1
54 05 56 69 09 9
9
1
68
67
51
52
53
22 84 1
1
100
70
69
59
58
57
56
54
74
75
76
81
80
77
78
43
42
39
38
37
36
35
34
33
32
31
30
29
89
88
87
86
85
84
83
82
10
9
8
7
6
5
27
26
25
24
23
22
21
20
19
18
17
16
14
13
49
79
97
96
93
92
98 11
12
3
4
95
94
50
IC22
TC140GAF-0061
CSR3
CSR2
CSR1
CSR0
1213 IC9F
74VHC04
CSR[0..5]
CSS[0..6]
SYCSP
CSS[0..6]
CSR[0..5]
CSS2
CSS1
CSS0
CSS6
CSR5
CSR4
CSS3
CSS4
A4
A3
A2
A1
A0
D[0..7]
D7
D6
D5
D4
D3
D[0..7]
CSS5
VCC C124
0.1u
C125
220u/6.3
LRCK
DBCK
DAD1
XSF1
VCC
O
3
NC
1 V4
G2
X4
SG-531YH
35MHz
VCC
VCC
V
D
D
6
0
G
N
D5
G
N
D6
G
N
D7
G
N
D
8
G
N
D
4
2
G
N
D
6
1
V
D
D
5
7V
D
D
5
8V
D
D
5
9
A2
47 A1
48 A0
49 IOWR
52 IOEN
54 INT
63
BIO
64
D15
10 D14
11 D13
13 D12
14 D11
15 D10
16 D9
17 D8
20 D7
21 D6
22 D5
23 D4
25 D3
27 D2
28 D1
30 D0
31
MC/MP 62
RS 2
X1 3
CLKIN 4
CLKOUT 9
MEN 56
NC 1
NC 12
NC 18
NC 19
NC 24
NC 29
NC 33
NC 50
NC 51
NC 55
V
D
D
2
6
IC23
TMP320P16
D2
D1
D0
MINT
RESET
XCS1
XRD
XWR
ASA
ASC
AHLD
ABCK
AIN1
AIN2
AIN3
RS
ASB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
VG-8EX
Jul, 1998
18
‰MAIN BOARD ASS'Y (GA BLOCK)
VG-8EX MAIN BOARD INTERCONNECTION DIAGRAM

w
e
AD[0..19]
A[0..7]
D[0..7]
XWR
XRD
XCS2
XCS3
D[0..7]
A[0..7]
AD[0..19]
CSS[0..6]
CSR[0..5]
C126
0.1u
C127
0.1u
C128
0.1u
C129
220u/6.3
C130
220u/6.3
CSS[0..6]
CSR[0..5]
VCC
CSA[0..6]
C131
0.1u
C132
0.1u
C133
0.1u
C134
220u/6.3
C135
220u/6.3
VCC
CSS6
CSS4
CSS3
CSS2
CSS1
CSS0
CSA6
CSA5
CSA4
CSA3
CSA2
CSA1
CSA0
AD13
AD12
AD11
AD10
AD9
AD8
A7
A6
A5
A4
A3
A2
A1
A0
5 1
41 92 43 23 7
1
8
73
74
75
76
77
78
79
81
82
83
84
85
86
87
88
89
92
93
94
133
134
135
136
137
138
139
58
57
56
53
52
51
38
40
43
45
48
47
44
41
39
30
29
27
26
25
23
22
21
20
17
16
15
13
12
11
9
8
7
6
4
3
2
1
49
31
35
34
33
65
64
63
62
61
95
132
131
130
129
128
125
124
123
122
121
120
119
118
117
114
113
112
111
109
108
107
106
103
102
101
100
99
98
97
4
25 05 55 96 88 09 11 0
51
1
01
1
61
2
71
4
11
4
3
2
84 65 46 79 01
0
41
1
51
2
6
1
01
4
4
72
71
70
69
66
60
140
142
96
3
6IC25
TC170C110AF-002
CSR2
CSR1
CSR0
CSA6
CSA4
CSA3
CSA2
CSA1
CSA0
CSR3
CSR4
CSR5
5 1
41 92 43 23 7
1
8
73
74
75
76
77
78
79
81
82
83
84
85
86
87
88
89
92
93
94
133
134
135
136
137
138
139
58
57
56
53
52
51
38
40
43
45
48
47
44
41
39
30
29
27
26
25
23
22
21
20
17
16
15
13
12
11
9
8
7
6
4
3
2
1
49
31
35
34
33
65
64
63
62
61
95
132
131
130
129
128
125
124
123
122
121
120
119
118
117
114
113
112
111
109
108
107
106
103
102
101
100
99
98
97
4
25 05 55 96 88 09 11 0
51
1
01
1
61
2
71
4
11
4
3
2
84 65 46 79 01
0
41
1
51
2
6
1
01
4
4
72
71
70
69
66
60
140
142
96
3
6IC24
TC170C110AF-002
AD13
AD12
AD11
AD10
AD9
AD8
A7
A6
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0VCC
CAA8
CAA7
CAA6
CAA5
CAA4
CAA3
CAA2
CAA1
CAA0
CSA5 D7
D6
D5
D4
D3
D2
D1
D0VCC
CBA8
CBA7
CBA6
CBA5
CBA4
CBA3
CBA2
CBA1
CBA0
CSS5
CBD11
CBD10
CBD9
CBD8
CBD7
CBD6
CBD5
CBD4
CBD3
CBD2
CAD11
CAD10
CAD9
CAD8
CAD7
CAD6
CAD5
CAD4
CAD3
CAD2
TP2
RCS00000
VCC VCC
O3
NC 1
V
4
G
2
X5
SG-8002DC
65.152MHz
CAD1
CAD0 CBD1
CBD0
C143
0.1u
CBA8 CBD3
VCC
A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC31
LH64256CK-50
C142
0.1u
CBA8 CBD7
CBA[0..8]
CBD[0..11]
VCC
A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC30
LH64256CK-50
C141
220u/6.3
C140
0.1u
CBD11
VCC
A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC29
LH64256CK-50
CBA8CAD3
VCC
C139
0.1u
CAA8
CAD7 A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC28
LH64256CK-50
C138
0.1u
CAA8
CAD11
CAD[0..11]
CAA[0..8]
VCC
A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC27
LH64256CK-50
C136
0.1u
C137
220u/6.3
SYCSP
CAA8
VCC
A8
18 A7
17 A6
16 A5
15 A4
14 A3
12 A2
11 A1
10 A0
9
DQ4 25
DQ3 24
DQ2 2
DQ1 1
NC 5
W3
OE 22
CAS 23
RAS 4
V
C
C
1
3
G
N
D2
6
IC26
LH64256CK-50
CAA7
CAA6
CAA5
CAA4
CAA3
CAA2
CAA1
CAA0
CAA7
CAA6
CAA5
CAA4
CAA3
CAA2
CAA1
CAA0
CAD10
CAD9
CAD8
CAA7
CAA6
CAA5
CAA4
CAA3
CAA2
CAA1
CAA0
CAD6
CAD5
CAD4
CBA7
CBA6
CBA5
CBA4
CBA3
CBA2
CBA1
CBA0
CAD2
CAD1
CAD0
CBD10
CBD9
CBD8
CBA7
CBA6
CBA5
CBA4
CBA3
CBA2
CBA1
CBA0
CBD6
CBD5
CBD4
CBA7
CBA6
CBA5
CBA4
CBA3
CBA2
CBA1
CBA0
CBD2
CBD1
CBD0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
Jul, 1998
19
VG-8EX
‰MAIN BOARD ASS'Y (CSP BLOCK)

rt
y
AGND
AGND
AGND
AGND
IN_L
IN_R
OUT_L
OUT_R
2
6
4
8
7
5
3
1CN6
B8B-PH-K-S
R188 39kR187
10k C78 10p
C62 10p
C63
100u/16
1
2
3
Q26
RN1442
R168
10k
R209
10k
R167
5.6k
R258
3.9k
+7V
-7V
8
4
6
5 7
IC57B
M5218AFP
C61
150p
R166
5.6k
C60
0.012u
R165
5.6k
8
4
6
5 7
IC56B
uPC4570G2
R261
5.6k
+7V
-7V
8
4
6
5 7
IC55B
uPC4570G2
R161
220
C59
2700p
R164
5.6k
R163
47k
C58
10u/16
R162
5.6k
C57
10u/16
C56
100u/10_OS
+7V
-7V
R160
1k
R159
1.2k
C173
0.1u
C174
220u/6.3
+5VAVCC +5VA
DATAL
17
D
V
D
D
2
0
D
G
N
D1
1
IOUTL 4
VCOML 2
NC 3
REF 6
SERVO 5
NC 8
TP1
19
A
V
C
C
1
A
G
N
D
1
0
WDCK
16 DATAR
13
SYSCK
15 BCK
14
TP2
12 TP3
18
IOUTR 7
VCOMR 9
IC54
PCM69AU
1
2
3
4
8
7
6
5
RA7
47X4
C171
0.1u
C172
220u/6.3
DAD1
LRCK
XSF1
DBCK
VCC
R170
1k
R169
1.2k
C54
10u/16 C55 10u/16
+5VA
2
3 1
IC55A
uPC4570G2
R171
220
C67
2700p
R174
5.6k
R173
47k
C66
10u/16
R172
5.6k
C65
10u/16
C64
100u/10_OS
C69
150p
R176
5.6k
C68
0.012u
R175
5.6k
2
3 1
IC56A
uPC4570G2
R262
5.6k
C70 10p
R260
100k
C71
100u/16
1
2
3
Q27
RN1442
R178
10k
R213
10k
R177
5.6k
R259
3.9k
2
3 1
IC57A
M5218AFP
1
2
3
Q5
RN1442
R189
100k
C79
100u/16
R186
100k
R194 39kR193
10k
R185
3.3k
C80 10p
+7V
-7V
8
4
6
5 7
IC60B
M5218AFP
2
3 1
IC60A
M5218AFP
PHONES
R190
100(1/2W)
2
3
1
JK8
HLJ7001-01-3010
(MONO)
MIX OUT L
R196
100(1/2W)
4
2
3
1
7
JK9A
HLJ4336-01-3080
R198
150(1/4W)
R199
150(1/4W)
1
2
3
Q6
RN1442
1
2
3 Q7
RN1442
C73
100u/16
R197
100k
R192
100k
R191
3.3k
C81
100u/16 R195
100k
R179
100k
R181
4.7k
+7V
-7V
8
4
6
5 7
IC58B
M5218AFP
R182
100k
R180
4.7k
+7V
-7V
2
3 1
IC58A
M5218AFP
8
4
6
5 7
IC59B
M5218AFP
R201
150(1/4W)
R202
150(1/4W)
R204
150(1/4W)
R205
150(1/4W)
1
2
3 Q8
RN1442
1
2
3 Q9
RN1442
C76
100u/16 R203
100k
R200
100k
C74
100u/16
14
12
13
11
17
JK9B
(MONO)
AUX IN L
MIX OUT R
2
4
1
JK7
HLJ7101-01-3010
R207
150(1/4W)
R208
150(1/4W)
1
2
3 Q10
RN1442
R210
100k R211 100k
C82
10u/16
R206
100k
C77
100u/16
R183
4.7k
R184
4.7k
2
3 1
IC59A
M5218AFP
VEE
C90
10u/16
R29
10
C17
100u/10
C16
0.1u C91
10u/16
V+ 8
OSC 7
LV 6
VO 5
BST
1 C+
2 GND
3 C-
4
IC66
ICL7660S
-7V
R214
100k
C83
10u/16 R215
100k AUX IN R
2
4
1
JK6
HLJ7101-01-3010
GUITAR OUT
2
4
1
JK5
HLJ7101-01-3010
R217
100k
C84
100u/16
R218
1k
R219
1k
1
2
3 Q11
RN1442
R228
100k
C88
1u/50_L R225
220k
C89
0.1u
2
1
3
D21
DA204K
GTSIG
MUTE_S
+7V
+7V
-7V
-7V
GND
GND
GND
MUTE
1
2
3
4
6
7
8
5
CN7
B8B-XH-A
C177
100u/10
C178
100u/10
+7V
-7V C87
47u/16
1
2
3
Q14
2SC2412KR
1 2
3
Q12
2SA1037KR
R224
1k
R226
47k
R239
10k
R240
10k
1
2
3 Q21
2SC2412KR
-7V -7V
-7V
AG
AG
AG
AG
AG
AG
AG AG
AG AG AG AG
AG
AG
AG
AG
AG
AG
AG
AG
AG AG AG
AG AG
AG
AG
AG
AG
AG
AG
AG
AG AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AG
AGAGAG
AG
AG
AG AG
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
VG-8EX
Jul, 1998
20
‰MAIN BOARD ASS'Y (DAC BLOCK)