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Kenwood CD-423M-S Service Manual page 5

Multiple compact disc player
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3 7 63 1515 0
Pin No.
Pin Name
61
AVSS
62
LED
63
ICRESET
64
AVREF1
65
RXD-232C
66
TXD-232C
67
SQCK/SCK-SW
68
RXD-R
69
TXD-R
70
DOOR-SW
71
STB1
72
S1
73
SQS1
74
S0
75
SCK/SQCK
76-83
A0~A7
84-91
D0-7
92-98
A8~A14
99
A15(1M)
100
VSS
4. FL Microprocessor : UPD 780232GC-012 (X32-IC13)
Pin description
TE
L 13942296513
Pin No.
Pin Name
1
VDD
2
VSS
3,4
X1,2
5
VPP
6
RESET
7
SCK
8
SI
9
SO
10
POW-P
11
LED-A
12
LED-B
13
STANDBY
14
NC
15
STB
16
REM
17
NC
18
AVSS
19,20
A/D3,A/D2
21,22
A/D1,A/D0
23
VSS
24,25
AVDD/VDD
26
NC
27-43
P1-P17
www
44-58
P21-35
59
VDD
60
VLOAD
61-63
P18-P20
.
64
NC
65-72
1G-8G
73-80
9G-16G
CIRCUIT DESCRIPTION
I/O
-
GND.
O
STANDBY LED control terminal.
O
IC reset.
-
D/A reference power supply.
I
No connection.
O
No connection.
O
SQCK,SCK(DOT/DSP clock) selector. L:DSP.
I
No connection.
O
No connection.
I
Door open/close detector switch.
O
Strobe signal output to dot driver.
O
Data output to dot driver.
I
Sub code read data input.
I
Data input from dot driver.
O
Dot driver/sub code read clock.
O
Address output to SRAM.
I/O
SRAM data bus.
O
Address output to SRAM.
O
No used.
-
GND.
I/O
-
Power supply(+5V)
-
GND.
-
Main system clock.(5MHz).
-
GND.
I
System reset input.
I
Serial clock.
I
Data input.
O
Data output.
I/O
Timer sw on input.
O
No used.
O
No used.
O
No used.
-
No used.
I
Strobe signal input.
I
No used.
-
No used.
-
GND.
-
GND.
I
Key return signal input(1,0).
-
GND.
-
Power supply(+5V)
-
No connection.
O
FL control output.
O
FL control output. 2G-16G(P21to P35).
-
Power supply(+5V)
x
ao
u163
y
-
Negative power supply(-37.5V)
O
FL control output. 2G-16G(P18 to P20).
i
-
No connection.
O
FL control output.1G-8G.
O
FL control output.9G-16G.
CD-423M/423M-S/424M/DPF-J3030/J5030
2 9
8
Description
Q Q
3
6 7
1 3
1 5
Description
.
1G(38),2G-16G(P1to P17).
co
.
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
5

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