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 2/5 (CONTROLLER, PASW, CD PANEL)
G E N E R A L
OR
BUFFER
BUFFER
BUFFER
DFF
FLASH ROM 128M
D-FF
OR
OR
INVERTER
Photo Coupler
Photo Coupler
Photo Coupler
REG5V
B. COUNTER
DECODER
D-FF
EXP. I/O
OR
LINE DRIVER
INVERTER
TRANSISTOR ARRAY
INVERTER
SYSTEM RESET
DRAM 16M
FLASH ROM 16M
OR
REG3.3V
CLOCK
SINGLE SHOT
DECODER
INVERTER
INVERTER
INVERTER
Photo Coupler
to SPEAKER
IN
TO CONTROL
CABLE
FOR PIANO
TO HOST
OUT
N.C
DRIVE
SELECT
V525520
V807830
Pin No. FUNCTION
CN1
V379590
REW
FWD
STANDBY/ON
DRIVE
SELECT L SELECT R
CD-ROM PANEL
Note : See parts list for details of circuit board
component parts
: Ceramic Capacitor
FDD
LCD
LCD DRIVE
TIMER Adjustment
BOOT SW
MIDI
HOST SELECT
FG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
6
5
10
15
11
1
CONTROL UNIT DKC55RCD
WARNING
Components having special characteristics are marked
and must be replaced with parts having specifications equel
to those originally installed.