Read Sony CHC-P33D / HCD-H33D Service Manual online
– 20 –
Pin No.
Pin Name
I/O
Function
1
ENC
I
Volume encoder input terminal
2
SIRCS
I
Remote commander signal input
3
REQ. MG
I
Data transmission request input from master control Not used (Pull up)
4
REQ. GM
O
Data transmission request output to master control
5-9
LED
O
LED drive signal Not used (Open)
10
RDY
I/O
Master control Ready signal input/output “L”: Ready
11
SCK. IN
I
Clock output for communications with master control
12
SD. IN
I
Serial data input from master control
13
SD. OUT
O
Serial data output to master control
14
LED_PAUSE
O
PAUSE LED Output
15
LED_CD
O
CD LED Output
16
LED_TUNER/BAND
O
TUNER/BAND LED output
17
LED_TAPE
O
TAPE LED Output
18
LED_FWD. STOP. FF & REW
O
(, p, 0, ) LED drive signal output
19
LED_DECK_A/B & REV
O
9, DECK SELECT LED
20
LED_A
O
A LED Output
21
LED_B
O
B LED Output
22
KEY1
I
Not used (Pull up)
23
KEY2
I
24
KEY3
I
Key matrix input (A/D converter)
25
KEY4
I
26-29
BPF1-4
I
Not used (Connected to Ground)
30
RST
I
Reset signal input
31
EXTAL
I
System clock (4 MHz)
32
XTAL
O
33
Vss
—
Ground
34-62
P29-P1
O
FL Drive
63-69
7G-1G
O
FL grid signal output
70
NC
—
Not used (Open)
71
VFDP
—
LED Driver –25 V power supply
72
VDD
—
Power supply (+5 V)
73, 74
KEY
—
Not used (Pull up)
75
VDD (TEST)
—
Power supply (+5 V)
76
LED_TUNER_COMMON
O
TUNING MODE, STEREO/MONO, TUNER MEMORY LED drive signal output
77
LED_ENTER/NEXT
O
ENTER/NEXT LED drive signal output
78
ENC B
I
AMS encoder signal input
79
ENC A
I
80
ENC
—
Not used (Pull up)
PANEL BOARD
IC501 CXP82612-016Q (DISPLAY CONTROL)
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