Read Sony CDX-M50IP / CDX-MR50IP Service Manual online
35
CDX-M50IP/MR50IP
• IC Pin Description
IC501 MB90F045PF-G-9061-SPE1 (SYSTEM CONTROL) (MAIN BOARD (4/4))
Pin No.
Pin Name
I/O
Pin Description
1
AREASEL0
I
Destination setting pin (L: CDX-M50IP, H: CDX-MR50IP)
2
AREASEL1
I
Destination setting pin (Fixed at L in this set)
3
AREASEL2
I
Destination setting pin (L: FM (200k)/AM (10k), H: FM (50k)/AM (9k)
(CDX-M50IP only))
4
AREASEL3
I
Destination setting pin (L: CDX-MR50IP, H: CDX-M50IP)
5
BEEP
O
Beep signal output to power amp IC.
6
AMPSTB
O
Standby signal output to power amp IC.
7
DIAG
I
Status signal input from power amp IC.
8
NCO
O
Not used. (Open)
9
SA_DATA
O
Data output for electronic volume IC spectrum analyzer.
10
SA_CKO
O
Spectrum analyzer clock signal output
11
VSS
—
Ground
12
TUATT
O
Tuner mute control signal output
13
NSMASK
O
Noise mask signal output (CDX-MR50IP only)
14
VOLATT
O
Attenuator control signal output to electronic volume IC.
15
ILLUMI_SEL
I
Illumination voltage setting pin (L: illumination power supply 9 V)
16 to 20
NCO
O
Not used. (Open)
21
B-OUT_SEL
I
Black out select signal input (L: non black out)
22
NCO
O
Not used. (Open)
23
VCC5
—
Power supply pin (+3.3 V)
24
EEP_SIO
I/O
Serial data signal input/output for EEPROM communication.
25
EEP_CKO
O
Serial clock signal output for EEPROM communication.
26
RDS_ON
O
RDS ON signal output (CDX-MR50IP only)
27
LCD_CE
O
Chip enable signal output to LCD drive IC.
28
LCD_SO
O
Serial data signal output to LCD drive IC.
29
LCD_SCK
O
Serial clock signal output to LCD drive IC.
30
DOOR_IND
O
DISC IN indicator LED control signal output
31
RE_IN0
I
Rotary encoder signal input 0
32
RE_IN1
I
Rotary encoder signal input 1
33
I2C_SCK
O
I2C bus serial clock signal output
34
I2C_SIO
I/O
I2C bus serial data signal input/output
35
DAVDD
—
Power supply pin for A/D converter. (+3.3 V)
36
AVRH
—
External reference power supply pin for A/D converter. (+3.3 V)
37
DAVSS
—
Ground for A/D converter.
38
QUALITY
I
Noise detection signal input (CDX-MR50IP only)
39
VSM
I
S meter voltage detection signal input
40
KEYIN1
I
Key signal input 1
41
KEYIN0
I
Key signal input 0
42
VSS
—
Ground
43
RC_IN0
I
Rotary commander key signal input
44
INI_COL
I
Initial color setting signal input (L: red)
45
COL_SEL
I
Key illumination 2 colors select signal input (H: 2 color)
46
SA_IN
I
Spectrum analyzer signal input
47
NCO
O
Not used. (Open)
48
AD_ON
O
A/D converter power supply control signal output
49, 50
MD0, MD1
I
Signal input for operation mode designation. (Fixed at H in this set)
51
MD2
I
Signal input for operation mode designation. (Fixed at L in this set)
52
KEYACK
I
Key acknowledge detection signal input
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