Kenwood CD-4900M Schematics
X32,IC2 X32,IC8 CD MECHA
CXD2587Q CLOCK 35 CLOK S1 SW 7 S1 SW
CDM-31
(DSP) XLAT 36 XLAT S2 SW 4 S2 SW
DATA 44 DATA S3 SW 3 S3 SW
SCLK 33 SCLK D SENS1 23 DISC SW1
SENS 34 SENS D SENS2 60 DISC SW2
SYSM 45 MUTG +5V PUL 10 D PWM
SCOR 46 SCOR R CW 24 ROTARY+
SQCO 73 SQSI R CCW 25 ROTARY-
SQCK 75 SCK/SQCK LOAD SW 28 LOAD SW1
UNLOAD SW 29 UNLOAD SW1
X32,IC14 67 SCK SW LOAD M+26 LOADM+1
uPD780204
CLK
LOAD M-27 LOADM-1
(DOT DRIVER)
SO 72 SI
TIMER PLAY SI 74 SO LOADM+2 63 LOADM+2
ON/OFF STB 71 STB1 LOADM-2 62 LOADM-2
7P LOAD SW2 58 UNLOAD SW2
4P 5P 6P UNLOAD SW2 59 DLE SW2
uPD784217GF502
ON/ LED A LED B
STANDBY
X32,IC15
uPD780204 CLK
RESET 43 RESET INPUT
(DOT DRIVER)
SI
IC RESET 47 PERIPHERY IC RESET
STB 46 STB2
JOG
55 JOG 2
X32,IC10
56 JOG 1
14~21 D0~D7
LASER ON/OFF 70 LDC (D7~D0) uPD17215GT-737
ANALOG MUTE 48 SYSM
SPINDLE MOTOR ON/OFF 31 MON
RWRREQ 13 RWRREQ
RTREN 11 RTREN
8.16BIT 54 8,16 RWR 12 RWR
MODEL DISCRIMINATION 53 A/D0
X32,IC9
84~91
(D0~D7)
A1 SW A2 SW
1,76~83,92~99
(A0~A16) (SRAM)
P1 P2
RD 5 OE
uPD780024
RXD0 69 TXD1 WR 6 WE
(SUB uCOM)
TXD0 68 RXD1 CS 7 CS
ASTB 8 LE
TX OUT 65 TXD2 SDATA 49 SERIAL COMMUNICATION
RECEIVER
66 RXD2 SBUSY 50
N D I P
1
1
1
16
48
33
64
49
17
32
41
60
20
1
40
E
B
20
1
17
15
2
10
11
21
61
80
8
16
X25-6060-12
N D I P
ACEBD
PC BOARD (Component side view)
1
2
SUB-CIRCUIT UNIT
3
4
5
6
7
Refer to the schematic diagram for the value of resistors and capacitors.
9
F GIHJ
IC13
IC7
IC2
IC1
IC8
Q24
Q23
IC9
IC10
IC11
R31
C6
C70
C69
R109
R147
C23
R4
R3
C4
R2
R5
R1
R6
R14
R12
R13
C24
R30
C78
C79
R29
C9
C10
C80
C8
R7
R180
R142
R95
R23
C16
C15
R25
R24
R17
R18
R19
C22
C12
C13
R22
R21
R20
C14
C95
R179
C96
10
1
6
5
4
5
1
8
C11
R26
R15
R10
R11
R16
C157
R107
R106
R205
C59
R102
C30
C158
C20
C19
R34
R90
R204
R32
R35
C43
R36
C66
R103
R104
C29
R41
R39C27
R43
R38
R27
C28
R44
R42
R40
C21
R28
R91
R92
R108
R93
C99
R140
R141
R94
R99
R100
R144
R33
R101
R98
R97
R96
R143
R8
R9
1
10
11
20
60 61
80
1
20
21
40
41
31
30
80
81
5150
1001
1
7
14
8
15
28
14 1
17
32
16
1
EB
EB
D33
D38
Q35
D39
D1
D2
D32
Q26
Q1
CN13
CN15
CN11
CN3
Q27
D3
D31
D30
IC12
IC16
CN4
Q25
CN5
CN1
CN2
CN6
D5
D4
X32-3502-74 A/8
LOADM-1
GND
+5V
+5V
S.S
FE-BIAS
VC
VC
FE2
RF
FE1
TE2
TE1
CS
GND
+5V
GND
+5V
+5V
GND
+5V
GND
+7.5V
FCS-
+5V
GND
F
F
-40V
+7.5V
+5V
GND
SQCK
RST
SQSI
STB2
LCD
uCOM-F
RST
uCOM-F
VPP
+5V
MON
+5V
DOUT
uCOM-F
+5V
uCOM-F
+5V
SI
SQSI
F
GND
GND
GND
+5V
GND
F
+5V
GND
+5V
GND
SCOR
RESET
RD OE
+5V
GND
+5V
SO
STB1
GND
SLT-SW
GND
RF
+5V
BTL LOAD
4ch-BTL
TRK FCS
DMSLD
RESET
+5V
VC
GND
GND
+5V
VC
16.9344MHz
LCD
GND-SRAM
+5V-SRAM
+7.5V
+5V-SRAM
+5V
GND
TXD-R
RXD-R
GND
SQCK/SCK-SW
+5V
CS
WR WE
GND
+5V
+5V
+7.5V
GND
RF
+7.5V
C156
L5
W64
C17
W97
W96
W116
W111
W93
W90
W141
W98
W62
W43
W118
W63
W56
W14
W122
W105
W86
W119
W115
W117
W123
W16
W34
W66
W85
W73
W67
W32
W15
W17
W100
W53
W45
W20
W21
W91
W22
W23
W46
W47
W30
W29
W38
W26
W42
W70
W36
W24
W54
W39
W69
W52
W125
W127
W126
W121
W131
W132
W133
W129
W79
W81
W83
W88
W92
W101
W106
W82
W74
W142
W57
W28
W18
W19
W35
W40
W68
W37
W59
W55
W27
W139
W49
W89
W84
W80
W77
W61
W138
W72
W112
W114
W76
W99
W50
W128
W120
W48
C101
C102
W103
W140
3.4MHz
FE-B
12.5MHz
C3
C7
C54
C67
C18
C68
C1
C55
C56
C26
C2
C25
C58
C5
C53
L1
X1
TEST
VR1
X2
C57
X3
SQCK/SCK-SW
91
1
16
17
32
1
8
1
2
1
10
16
1
17
1
12
1
17
1
14
1
5
BE
BE
E
B
BE
B
E
N D I P
PC BOARD (Component side view)
1
CD PLAYER UNIT
2
3
4
5
6
7
10
Refer to the schematic diagram for the value of resistors and capacitors.
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