Read Sony CDX-S2250V Service Manual online
32
CDX-S2250V
IC501 MB90487APF-G-118-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (3/4))
Pin No.
Pin Name
I/O
Pin Description
1
AREA SEL2
I
Destination setting pin
2
AREA SEL1
I
Destination setting pin
3
AREA SEL0
I
Destination setting pin
4
COL SW
I
Illumination color select signal input
5
BEEP
O
Beep signal output
6
NCO
O
Not used
7
NOSE SW
I
Front panel open/close detect signal input
8
DIAG
I
Power AMP status signal input
9
VOL ATT
O
Electronic volume attenuate control signal output
10
NCO
O
Not used
11
VSS
—
Ground
12
TU ATT
O
Tuner mute control signal output
13
NS MASK
O
Noise mask signal output
14
ILLUMI SEL1
I
Illumination voltage setting pin
15
ILLUMI SEL2
I
Illumination voltage setting pin
16
NCO
O
Not used
17
NCO
O
Not used
18
NCO
O
Not used
19
NCO
O
Not used
20
NCO
O
Not used
21
NCO
O
Not used
22
NCO
O
Not used
23
VCC5
—
Power supply pin (+3.3V)
24
EEP SIO
I/O
EEPROM bus serial data input/output
25
EEP CKO
O
EEPROM bus serial clock output
26
AMP STB
O
Power AMP satandby signal output
27
LCD CE
O
LCD driver chip enable output
28
LCD SO
O
LCD driver serial data output
29
LCD SCK
O
LCD driver serial clock output
30
RDS ON
O
RDS ON signal output
31
NCO
O
Not used
32
NCO
O
Not used
33
I2C SCK
O
I2C bus serial clock output
34
I2C SIO
I/O
I2C bus serial data input/output
35
DAVDD
—
A/D converter power supply pin (+3.3V)
36
AVRH
—
A/D converter reference power supply pin (+3.3V)
37
DAVSS
—
Ground
38
QUALITY
I
Noise detect signal input
39
VSM
I
S-meter voltage detect signal input
40
KEY IN1
I
Key signal input
41
KEY IN0
I
Key signal input
42
VSS
—
Ground
43
RC IN0
I
Rotary commander key signal input
44
NCO
O
Not used
45
NCO
O
Not used
46
NCO
O
Not used
47
NCO
O
Not used
48
NCO
O
Not used
49
MD0
I
Operation mode setting pin
50
MD1
I
Operation mode setting pin
51
MD2
I
Operation mode setting pin
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