CFD-S40CP - Sony Audio Service Manual (repair manual). Page 17

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17
CFD-S40CP
Pin No.
Pin name
I/O
Description
1
C-DOOR
I
Door open/close switch (S701) input
2
RMC
I
Remote control signal input
3
ES-EMG
O
Emergency signal output
4
B/C-MUTE
O
Radio mute signal output
5
REC-MUTE
O
Mute signal output on switching function
6
ES-CS
I
CD chip select signal input
7
ES-CLK
I
CD clock signal input
8
ES-ID
I
CD serial data signal input
9
ES-OD
O
CD serial data signal output
10
P-CON
O
Power control signal output
11
BATTCHK
O
Battery voltage check signal output
12
MP3LIGHT
O
MP3 light  signal output
13
A-MUTE
O
Audio mute signal output
14
R-COUNT
O
Radio count signal output
15
R-CLOCK
O
Radio control clock signal output
16
R-DATA
O
Radio control data signal output
17
R-CE
O
Radio latch signal output
18
V-LATCH
O
Data latch signal output to LC75342 (VOL IC)
19
V-DATA
O
Data signal output to LC75342 (VOL IC)
20
V-CLOCK
O
Clock signal output to LC75342 (VOL IC)
21
AC/DC CHK
I
AC/DC check signal input
22 – 24
KEY-1 – 3
I
Key input terminal of A/D port
25
VM REG
I
Battery center voltage input terminal of A/D port
26
VH REG
I
Battery voltage input terminal of A/D port
27
BL CONT/INIT
O
Initial setting signal and LCD back light control signal output
28
M. B/MODE CHECK
I
Reading specification and MEGA BASS signal input terminal (A/D port)
29
SHIFT CLOCK
O
Clock frequency shift change signal output
30
RST
I
System reset signal input
31
EXTAL
I
Crystal oscillator terminal (4.0MHz)
32
XTAL
O
Crystal oscillator terminal (4.0MHz)
33
VSS
Ground terminal
34
VL
O
LCD bias control signal output
35
VLC3
LCD bias voltage terminal
36
VLC2
LCD bias voltage terminal
37
VLC1
LCD bias voltage terminal
38 – 41
COM0 – 3
O
LCD common signal output
42 – 69
SEG0 – 27
O
LCD segment signal output
70
RADIO
O
Radio function signal output
71
CD
O
CD function signal output
72
VDD
Power supply terminal
73
REC
I
Tape recording function signal input
74
NC
Not used (Connect to ground)
75
NC
Not used (Open)
76, 77
ISS-1, -2
O
ISS select signal output
78
TC-PLAY
I
Tape play switch (S321) input
79
JOG +
I
JOG dial key (+) signal input
80
JOG –
I
JOG dial key (–) signal input
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC801   CXP83620-029Q  SYSTEM CONTROL
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