2
KDC-237SA/237SAY
KDC-237SG/237SGY
BLOCK DIAGRAM
2
16
1
FRONT/
P.ON FL
BU DET
PHONE
ACC DET
RST
PHONE
ACC DET / BU DET
PS1-1 / PS1-2 / PS1-3
P.ON FL
PS2-1 / PS2-2
9
5
9
BU DET
1
1
3
MUTE
8
R11-15
1
2
3
3
3
1
ROM CORRECTION (NOT USED)
1
1
REAR/SW
1
1
1
1
R80-82
P-ANT
P-CON
B.U.
ACC
PHONE
SP-OUT
PS2-1 / PS2-2
PS1-1 / PS1-2 / PS1-3
R103
1
FL+B
2
LX-BUS
E-VOL
IC2 or IC3
A8V
SYSTEM u-COM
BU
POWER
DC-DET
Q701-704
PRE-OUT
PHONE
ACC-DET
Q101
SURGE-
Q103
BU-DET
Q102
SW14V
Q1
Q2
DC-CN
A8V
SERVO+B
D5
BU5
SW5
DET
BU
DC-CN etc
BU5
PAN5V
WIRED
REMOTE
RESET IC
IC8
B
CN
RESET
ENCODER
ROTARY
REMOTE
ILLUMI
KEY
MATRIX
KEY
VFD
IC1
SW5
IC6
IC2
J1
+B
ILLUMI
B
AM+B
S1
ED1
CN4,J5
MUTE
Q705
J4
J2
A1
SERVO+B
A8V
Q302
BU5
1/2W
Rx5
Q301
BU5
BU5
Q901-903
DME1
BU5
SW5
CD
SERVO
SW5
IC
CN3
to GND
S3
J1
SW5
AM+B
A8V
TUNER
FRONT-END
ANT.
DECODER
RDS
IC7
SW5
ANALOG
SW
IC9
E2PROM
SW5
BU
MECHA
CD
CONT
SW
Q401
A8V
A8V
PRE-OUT
MUTE
BU5
SW5
DSI
F-AUX
J2
PANEL DET
Rx3
1/2W
IC1
BU5
SW5
SW14V
FL+B
IC4
POWER
SUPPLY
IC
FL+B
J3
BU5
IC10
VFD
DRIVER
Q8,9
Q7
ELECTRIC UNIT (X34- )
SWITCH UNIT (X16- )
DPU1
CD PLAYER UNIT (X32-598x-xx)
BOARD (X34- )
MOTHER
E
F
A
C
B
TR COIL
FO COIL
APC
IC1
16.93MHz
CLOCK
IC6
8V SW
3.3V REG
IC3
LOADING &
RF AMP
SERVO
PROCESSOR
MOTOR
DRIVER
MOTOR
SPINDLE
3.3V REG
IC2
S2
S4
S1
S3
+
+
ONLY
SLED
MOTOR
DM1
DM2
Q1
X2
Q7
PROCESSOR
MICRO
1 CHIP IC
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
Q3
Q3
Q4
(0-00),(0-01) ONLY
SW
Q2
SW
Q8,9
3.3V SW
Q6
SW
(0-01),(0-03)
ONLY
(0-00),(0-01)
X1 or
VREF
D.GND
BU5V
8EJE-SW
12EJE-SW
LOS-SW
LOE/LIM-SW
D.GND
MOTOR
LO/EJ
S.GND
D.GND
D.GND
S.GND
A.GND
AS8V
R-ch
L-ch
S.GND
DMUTE
A,B,C,E,F
VREF
TR OUT
FO OUT
DM OUT
FM OUT
TVD,SPL
FOD,TRD,
DATA
CLK
MSTOP
RST
MUTE
MUTE
CLK
DATA
MSTOP
MRST
D.GND
S7V
AVDD
REGVDD
P-ON1
IOVDD