Read Sony MHC-W770AV / STR-W770 Service Manual online
– 29 –
3-9.
IC PIN FUNCTION
• IC501 TMP87CM75F-6623 (DISPLAY CONTROL)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
—
—
O
I
O
O
O
O
I
I
—
O
I
I
O
I
—
I
I
I
I
I
I
I
I
—
I/O
I/O
—
—
—
O
O
O
O
O
O
O
—
I
I
I
I
I
I
I
I
—
—
—
Description
Not used
Power supply (–35V)
Transfer clock output serial data
Serial data input
Serial data output
Chip enable output
Latch output to IC504
H : D542, D543 ON
Stereo signal input
Tuned signal input
Power supply (Ground)
Oscillator connection terminal (8MHz)
Oscillator connection terminal (8MHz)
Reset signal input terminal
Oscillator connection terminal (32.768kHz)
Oscillator connection terminal (32.768kHz)
Not used (Ground)
AC Power supply off
RDS DATA input
RDS clock input
SIRCS signal input
JOG dial encoder input
Volum encoder input
Volum encoder input
JOG dial encoder input
Not used
12C clock I/O
12C data I/O
Not used
Power supply (5V)
Power supply (Ground)
Latch output to IC105
Latch output to IC2002
Mute output to transistor
L : Mute ON
DBFB level control output
L : DBFB HIGH
Latch output to IC6003
H : Key con ON
L : SP relay ON
Not used
Key data input (A/D converter)
Key data input (A/D converter)
Key data input (A/D converter)
Spectrum analyzer signal input
Spectrum analyzer signal input
Spectrum analyzer signal input
Spectrum analyzer signal input
Input for model select
Power supply for analog (Ground)
Power supply (+5V)
Power supply (Ground)
Pin Name
NC
VG
COM CLK
ST DATA IN
COM DATA
ST CE
LED LAT
POWER ON/OFF
STEREO
TUNED
Vss
X OUT
X IN
RESET
XT OUT
XT IN
GND
BACK UP
RDS DATA
RDS CLK
SIRCS IN
JOG IN B
VOL IN B
VOL IN A
JOG IN A
AUB IN
12C CLK
12C DATA
AUB OUT
V
DD
Vss
EQ LAT
VR LAT
TA MUTE
VIDEO MD
KEY CON LAT
KEY CON ON/OFF
POWER ON/OFF
P LOG RELAY
KEY IN 0
KEY IN 1
KEY IN 2
SPEANA 0
SPEANA 1
SPEANA 2
SPEANA 3
SUFFIX
VASS
VAREF
V
DD
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