CMT-EP505, HCD-EP505 - Sony Audio Service Manual (repair manual). Page 33

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Pin No.

Pin Name

I/O

Description

1 to 4

KEY2 to KEY5

I

Key input terminal (A/D input)

5

ANALYZER

I

Analyzer level detection signal input terminal (A/D input)    Not used

6

STATION

I

Tuning detection signal input terminal

7

RDSDATA

I

Serial data input from the RDS decoder    (Used for the AEP, UK models)

8

AVDD

—

Power supply terminal

9

AVREF

I

Reference voltage input terminal

10, 11

CDOUT1, CDOUT2

O

Not used

12

VSS

—

Ground terminal

13

TIME

O

LED drive signal  output terminal

14

CDDATA

I/O

Two-way data bus with the CD block

15

CDRESET

O

Reset signal output to the CD block    “L”: reset

16

REC-EN

O

REC bias control signal output terminal

17

INPINENA

O

Mega bass on/off selection signal output terminal    “H”: mega bass on

18

REC-LED

O

LED drive signal  output terminal

19

SOUNDENA

O

chip enable signal output foe the LC75392

20

PLLENA

O

PLL chip enable signal output to the FM/AM PLL    “H” active

21

MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

22

POWER

O

System power on/off control signal output terminal    “H”: power on

23 to 26

COM0 to COM3

O

Common drive signal output to the liquid crystal display

27

BIAS

O

Bias output for the liquid crystal display drive

28 to 30

VLC0 to VLC2

I

Input terminal for doubler circuit capacitor connection to develop liquid crystal display drive 
voltage

31

VSS

—

Ground terminal

32 to 61

SEG0 to SEG29

O

Segment drive signal output to the liquid crystal display

62

SEG30

I/O

Segment drive signal output to the liquid crystal display
AM frequency select switch input terminal
(AM frequency select switch: used for the except AEP, UK, chinese models)

63

SEG31

I/O

Segment drive signal output to the liquid crystal display
AM frequency select switch input terminal
(AM frequency select switch: used for the except AEP, UK, chinese models)

64

SEG32

Segment drive signal output to the liquid crystal display

65

SEG33

O

Segment drive signal output to the liquid crystal display    Not used

66

SEL10

I

Head position detect switch input terminal    “L”: reverse direction,  “H”: forward direction

67

SEG35

O

Segment drive signal output to the liquid crystal display    Not used

68

SEL12

I

Cassette tape detect switch input terminal    “L”: no cassette,  “H”: cassette in

69

SEG37

O

Segment drive signal output to the liquid crystal display    Not used

70

SEL14

I

Rec-proof claw (forward direction) detection signal input from the protect detect switch
“L”: recording possible,  “H”: protect

71

SEL15

I

Rec-proof claw (reverse direction) detection signal input from the protect detect switch
“L”: recording possible,  “H”: protect

72

DATAIN

I

Serial data input from the FM/AM PLL

73

DATAOUT

O

Serial data output to the FM/AM PLL and LC75392

74

CLK

O

Serial data transfer clock signal output to the FM/AM PLL and LC75392

75

EEPROMDATA

I/O

Two-way data bus with the EEPROM

76

STEREO

I

FM stereo detection signal input terminal    “L”: stereo

77

EEPROMCLK

O

Clock signal output to the EEPROM