CX-JS7, JAX-S7 - Sony Audio Service Manual (repair manual). Page 51

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Pin No.

Pin Name

I/O

Description

1

O-SYS-MUTE

O

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

2

I-BU1924 DI

I

RDS serial data input terminal    Not used

3

I-BU1924 CLK

I

RDS serial data transfer clock signal input terminal    Not used

4

O-CL78646 RESET

O

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

5

O-CL78646 CE

O

Chip enable signal output to the CD DSP

6

O-CL78684 CE

O

Chip enable signal output to the MP3 decoder

7

O-M61529 CLK

O

Serial data transfer clock signal output to the electrical volume

8

O-BU2099 LCK

O

Serial data latch pulse clock signal output to the LED driver, tape mechanism controller, multi
controller and bass boost controller

9

O-LC72121 CE

O

Chip enable signal output to the tuner unit

10

I-CL78684 SYNC

I

Chip enable signal input from the MP3 decoder

11

RESET

I

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

12

XT1

I

Sub system clock input terminal (32.768 kHz)

13

XT2

O

Sub system clock output terminal (32.768 kHz)

14

VSS1

—

Ground terminal

15

CF1

I

Main system clock input terminal (8.64 MHz)

16

CF2

O

Main system clock output terminal (8.64 MHz)

17

VDD1

—

Power supply terminal (+3.3V)

18

I-SPEANA L

I

Spectrum analyzer drive (low frequency)  signal input from the spectrum analyzer band-pass filter

19

I-SPEANA M

I

Spectrum analyzer drive (middle frequency) signal input from the spectrum analyzer band-pass
filter

20

I-SPEANA H

I

Spectrum analyzer drive (high frequency) signal input from the spectrum analyzer band-pass filter

21

I-MIC/I-TU SIG

I

Mic audio signal input terminal    Not used

22

I-BU UP DOWN/

CD OPEN CLOSE

I

Optical pick-up up/down detection signal and CD tray open/close detection signal input terminal

23

NC

—

Not used

24 to 26

I-KEY3 to I-KEY1

I

Front panel key input terminal (A/D input)

27

I-POWER DOWN

I

AC detection signal input terminal    “L”: power down

28

I-RMC

I

Remote control signal input terminal

29

I-HOLD

I

System malfunction signal (hold signal) input from the power amplifier circuit

30 to 40

G1 to G11

O

Grid drive signal output to the fluorescent indicator tube

41 to 45

S1 to S5

O

Segment drive signal output to the fluorescent indicator tube

46

VDD3

—

Power supply terminal (+3.3V)

47

S6/I-A-MODE

I/O

Segment drive signal output to the fluorescent indicator tube and deck-A mode detection signal
input from the tape mechanism deck block    “L” active

48

S7/I-A-PHOTO

I/O

Segment drive signal output to the fluorescent indicator tube and deck-A tape reel rotating
detection signal input from the tape mechanism deck block

49

S8/I-A-HALF

I/O

Segment drive signal output to the fluorescent indicator tube and deck-A cassette detection signal
input from the tape mechanism deck block    “L”: cassette in

50

I-REC (FWD)

I

Recording-proof (forward direction) detection signal input from the tape mechanism deck block
“L”: recording possible

51

FIX0

—

Not used

52

I-B-PHOTO

I

Deck-B tape reel rotating detection signal input from the tape mechanism deck block

53

I-B-HALF

I

Deck-B cassette detection signal input from the tape mechanism deck block    “L”: cassette in