Read Sony CDX-R505X Service Manual online
40
CDX-R505X
• IC501 MB90488BPF-G-185E1 (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
NCO
O
Not used
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
I
Not used
11
VSS
—
Ground
12
TU ATT
O
Tuner mute control signal output
13
NS MASK
O
Noise mask signal output (Not used in this set)
14
ILLUMI SEL1
I
Illumination voltage setting pin
15
ILLUMI SEL2
I
Illumination voltage setting pin
16
NCO
O
Not used
17
AUX IN
O
AUX/Light select signal output
18
FSW OUT
O
DC/DC converter OSC frequency control signal output
19
FL ON
O
FL power ON/OFF control signal output
20
NCO
O
Not used
21
DIM SEL1
I
FL tube dimmer setting pin
22
DIM SEL2
I
FL tube dimmer setting pin
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 standby signal output
27
FLS CS
O
FL driver chip enable output
28
FLS SO
O
FL driver serial data output
29
FL SCK
O
FL driver serial clock output
30
RDS ON
O
RDS ON signal output (Not used in this set)
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 (Not used in this set)
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
SA_IN
I
Spectrum analyzer data signal input
45
SA_CKO
O
Spectrum analyzer clock signal output
46
FSW IN
I
DC/DC converter OSC frequency signal input
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
52
KEY ACK
I
Key acknowledgment detect signal input
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