12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
DU1A
DU1A
DU1A
DU1A OVERALL CIRCUIT DIAGRAM 1/5 (MN, DB, HP, OTLT, OUTPUT)
V798690
1
DB
SWX00B
REG3.3V
REG5V
OP AMP
D/A CONVERTER
ROM 1M
RAM 1M
N.C
V903470 1
V939730
V903490
not installed
not installed
not installed
not installed
not installed
not
installed
not installed
: not installed
OTLT
V900040
V263610
Photo
Coupler
Photo Coupler
LINE
DRIVER/RECEIVER
MOTOR
DRIVE
REG12V
REGULATOR –5V
REG5V
REG3.3V
ROM
WAVE H
64M
ROM
WAVE L 64M
DRAM
4M
OP AMP
OP AMP
OP AMP
M
NAND
DRAM 4M
EPROM 16M
DAC
DAC
OP AMP
OP AMP
OP AMP
: Ceramic Capacitor
: Metal Oxide Film Resistor
Note : See parts list for details of circuit board
component parts
AC IN
AC IN
Mains Power SW
Mains Power SW
NOIZE FILTER
(U, APTW models)
to SUB POWER SUPPLY - CN1
L
R
AUX
MAX
HP1
HP2
MIN
VOLUME
MAX
MIN
REVERB
IN
OUT
AUX
HEADPHONES
DIP-SWITCH
to SILENT PEDAL SW.
to MOTOR
Power Supply
Name
Connection
others
VR2
WARNING
Components having special characteristics are marked and must be replaced with parts having
specifications equel to those originally installed.
MN
SILENT PEDAL SW
SILENT PEDAL SW ON
ON
CN4: 3,5 pins
OFF