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Kenwood CD-423M-S Service Manual page 9

Multiple compact disc player
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A
B
PC BOARD (Component side view)
Q Q
3 7 6 3 1 5 1 5 0
1
X32 E/5
2
3
T E
L
1 3 9 4 2 2 9 6 5 1 3
X32-3770-10 A/5 (J70-1360-11)
4
Rch
AUDIO
(27Vrms)
Lch
DIGITAL
OUTPUT
OPTICAL
SYSTEM
5
CONTROL
J3
SL16
TEXT
220V
230V
6
w w w
110V
120V
.
7
Refer to the schematic diagram for the value of resistors and capacitors.
C
D
16
30
J4
IC16
15
1
5
4
1
2
1
6
E6
WH3
W153
9
5
60
61
IC15
80
41
1
40
232C-uCOM
21
20
11.0592MHz
X5
L.P.F
J1
RF&DSP
E
B
2
Q4
C34
W206
+5V
R44
R60
E
B
Q6
R52
W17
GND
1
E
B
Q8
R50
R46
E
B
1
4
Q7
A2
IC3
E
B
Q5
L.P.F.
3
5
8
1
E
B
SERVO.DSP.
Q3
80
R45
CD-TEXT.DAC
1
R49
R51
J2
R43
C35
C17
X1
C18
W8
DOUT
W9
+5V
W10
GND
16.9344MHz
P1
W165
GND
W166
+5V
Q22 Q21
AVR
C41
CN8
S13
1
D6
D5
2
Q11
E
B
R66
D4
CN7
C39
Q12
E
B
1
Q9
REG-ON
S
G
D
x
a o
y
3
D3
i
E
F
X32 C/5
POWER-ON-PLAY-SW
8
OFF
ON
S12
4
2 3
1
E2
WH1
X32 B/5
(5)RST
(4)VPP
D26
E1
W12
4
STANDBY
WH1
POW-ON-P
2 3
C71
1
S1
(6)X1
POWER
CP5
X32 D/5
W2
F1
W6
-36V
1
2
D29
R145
R143
D28
S11
DOOR-SW
D32
R138
D27
E8
D31
R125
S5
DISPLAY
D30
S3
RANDOM
S10
WH2
DISC SKIP
E3
WH2
E4
1
1
R130
B
3
3
E
Q
Q
3
7
6
3
uCOM-F
FE-B
W207
+5V
W47
VR1
SCOR
7
1
uCOM-F
W25
CN2
MDP
W208
20
21
+5V
C7
W34
VC
C6
LD
W64
VC
1
IC2
40
W36
FE
R11
CURRENT-CHECK
41
R19
R18
W37
TE
R10
R157
2
W68
+5V
11
20
R7
W71
61
60
W38
RF
IC1
RF-AMP
E
W31
VC
L1
10
1
B
W32
W70
W61
RF
R34
A
W35
+5V
GND
W33
GND
W22
+5V
W30
+5V
DI
SI
SO
DO
C21
C5
32
R33
IC5
4ch-DRIVER
C51
1
W60
GND
W26
GND
FI
TI
TO FO
L2
R82
C54
Q18
E5
B E
WH3
W19
5
C46
D13
1
4
C47
C48
u 1 6 3
2
Q15
B
W155
R71
E
Q17
.
E
B
1
6
E
B
CN6
Q16
9
G
H
2
4
9
9
(1)SI
(2)SO
(3)SCK
C72
19
1
(8)GND
(7)+5V
18
2
20 21
CN10
X4
WH4
RST
W40
5MHz
W41
LED
W28
GND
1
IC13
40
W29
+5V
W42
U+5V
FL-uCOM
W43
80
41
REM
W44
GND
W167
+7.5V
61
60
W45
A/D1
W46
A/D2
55
56
CP2
CP1
W39
-36V
W210
-36V
CP3
CP4
W51
F1
S4
CONFIRM
R124
S6
DOWN
S2
REPEAT
B
E
1
5
1
5
0
8
9
2
uCOM-F
SQSO
19
W86
CN3
SLT-SW
18
1
10
W205
GND
CN9
C67
W162
+7.5V
W98
+5V
W95
+5V
1
9
W99
GND
W100
U+5V
IC11
R116
W101
DISC-SW1
W90
LOADM+
W102
DISC-SW2
CN1
15
R117
W103
S1-SW
W91
GND
16
LOAD-SW
W106
W118
W107
W119
D1
UNLOAD-SW
E
W120
W108
U+5V
W117
uCOM-F
W201
VPP
W92
RST
W202
X1
50
51
PD
W93
GND
X2
W94
U+5V
12.5MHz
31
IC6
30
17
MAIN-uCOM
W87
MON
W88
+5V
C50
1
100
15
28
16
W112
WR8WE)
IC8
W164
+5V
W113
RD(OE)
LCD-uCOM
W114
GND
CE(CSRAM)
W80
14
1
W81
U+5V
R115
Q24
E
B
W82
SRAM+5V
W115
SRAM+5V
X3
W83
+7.5V
3.64MHz
17
15
W84
GND
C66
IC9
m
ROTLY
-DRIVER
SRAM(256K)
1
4
1
5
14
IC12
IC7
IC10
SRAM(1M)
c o
10
6
16
8
5
GND
W156
W89
DISC-SW2
+5V
1
8
E7
E
B
1 2
Q26
CN4
CN5
I
J
2
8
9
9
A1
C73
1
3
ED1
S9
PLAY/PAUSE
S7
STOP
S8
UP
R126
4
9
8
2
9
9
1
2
W125
SQSO
uCOM-F
SQCK
W126
W157
IC-RST
W158
RXD-232C
W159
TXD-232C
SBUST
SDATA
PROTECT
U+5V
W123
SQCK/SCK-SW
W160
RXD-R
W161
TXD-R
80
uCOM
81
W122
A15
32
28
1
1
10

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