CFD-E75L - Sony Audio Service Manual (repair manual). Page 37

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Pin No.

Pin Name

I/O

Description

1

CD-WRQ

I

Interruption detection signal input from the LC78645NE (IC701)

2

RMC

I

Sircs remote control signal input from the remote control receiver (IC804)

3

BUZZER

O

Buzzer sound signal output

4

N.C

O

Not used (open)

5

CD-RES

O

System reset signal output to the LC78645NE (IC701)    “L”: reset

6

CD CE

O

Chip enable signal output to the LC78645NE (IC701)

7

CD CL

O

Serial data transfer clock signal output to the LC78645NE (IC701)

8

CD DO

I

Serial data input from the LC78645NE (IC701)

9

CD DI

O

Serial data output to the LC78645NE (IC701)

10

CD DRF

I

Focus on/off detection signal input from the LC78645NE (IC701)

11

CD FSEQ

I

Synchronizing signal detection signal input from the LC78645NE (IC701)

12

V-DATA

O

Serial data output to the electrical volume (IC320)

13

V-CLOCK

O

Serial data transfer clock signal output to the electrical volume (IC320)

14

N.C

O

Not used (open)

15

MEGABASS

I

Megabass on/off control signal output    “L”: megabass on

16

A-MUTE

O

Audio muting on/off control signal output to the electrical volume (IC320)    “H”: muting on

17

N.C

O

Not used (open)

18

CD

O

Power on/off control signal output for the CD +5V power supply, and CD function control signal 
output to the TA2068N (IC301)    “H”: CD power on (CD on)

19

P-CON

O

Power on/off control signal output to the power supply circuit, and power amplifier (IC390)
“L”: standby mode, “H”: power on

20

CD DOOR

I

CD lid open/close detection switch (S901) input terminal    “H”: CD lid is closed

21

REG CHK

I

Regulator check signal input of the AC input or battery input    “H” active

22

N.C

O

Not used (open)

23

KEY-1

I

Key input terminal (A/D input)    S401 to S406 (OPERATE, STANDBY, RADIO BAND AUTO 
PRESET, TUNE m –, TUNE M +, DSPL ENT MEM) keys input

24

KEY-2

I

Key input terminal (A/D input)    S407 to S413 (MENU ALARM, x, u, VOLUME –, 
VOLUME +, MEGA BASS, MODE) keys input

25

JOG-B

I

Jog dial pulse input from the rotary encoder (RE401 JOG DIAL) (B phase input)

26

JOG-A

I

Jog dial pulseinput from the rotary encoder (RE401 JOG DIAL) (A phase input)

27

SIMUKE CHECK

I

Destination setting terminal

28

INIT

O

Initial setting signal output

29

SHIFT CLK

O

Shift clock output of the main system clock (4.19 MHz)    “H” active

30

RST

I

System reset signal input from the reset signal generator (IC843)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

31

EXTAL

I

Main system clock input terminal (4.19 MHz)

32

XTAL

O

Main system clock output terminal (4.19 MHz)

33

VSS

—

Ground terminal

34

VL

O

Liquid crystal display drive bias control signal output terminal

35 to 37

VLC3 to VLC1

—

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

38 to 41

COM0 to COM3

O

Common drive signal output to the liquid crystal display (LCD801)

42 to 61

SEG0 to SEG19

O

Segment drive signal output to the liquid crystal display (LCD801)

62 to 64

N.C

O

Not used (open)

65

RADIO

O

Power on/off control signal output for the radio +6V power supply    “H”: radio power on

66

TU-CE

O

PLL chip enable signal output to the FM/AM PLL (IC2)