CMT-PX333, HCD-PX333 - Sony Audio Service Manual (repair manual). Page 82

82

Pin No.

Pin Name

I/O

Description

1

MNT0 (FOK)

O

Focus OK signal output terminal    “H” is output when focus is on (“L”: NG)
Not used (open)

2

MNT1 (SHOCK)

O

Track jump detection signal output to the MD mechanism controller (IC1001)

3

MNT2 (XBUSY)

O

Busy monitor signal output to the MD mechanism controller (IC1001)

4

MNT3 (SLOCK)

O

Spindle servo lock status monitor signal output to the MD mechanism controller (IC1001)

5

SWDT

I

Writing serial data signal input from the MD mechanism controller (IC1001)

6

SCLK

I (S)

Serial data transfer clock signal input from the MD mechanism controller (IC1001)

7

XLAT

I (S)

Serial data latch pulse signal input from the MD mechanism controller (IC1001)

8

SRDT

O (3)

Reading serial data signal output to the MD mechanism controller (IC1001)

9

SENS

O (3)

Internal status (SENSE) output to the MD mechanism controller (IC1001)

10

XRST

I (S)

Reset signal input from the MD mechanism controller (IC1001)    “L”: reset

11

SQSY

O

Subcode Q sync (SCOR) output to the MD mechanism controller (IC1001)
“L” is output every 13.3 msec     Almost all, “H” is output

12

DQSY

O

Digital In U-bit CD format subcode Q sync (SCOR) output to the MD mechanism controller 
(IC1001)    “L” is output every 13.3 msec     Almost all, “H” is output

13

RECP

I

Laser power selection signal input from the MD mechanism controller (IC1001)
“L”: playback mode, “H”: recording mode

14

XINT

O

Interrupt status output to the MD mechanism controller (IC1001)

15

TX

O

Magnetic head on/off signal output to the over write head drive (IC181)

16

OSCI

I

System clock signal (90.3168 MHz) input terminal

17

OSCO

O

System clock signal (512Fs=90.3168 MHz) output terminal    Not used (open)

18

XTSL

I

Input terminal for the system clock frequency setting
“L”: 45.1584 MHz, “H”: 90.3168 MHz (fixed at “H” in this set)

19

DIN0

I

Digital audio signal input terminal when recording mode    Not used

20

DIN1

I

Digital audio signal input terminal when recording mode

21

DOUT

O

Digital audio signal output terminal when playback mode

22

DADTAI

I

Recording data input from the A/D converter (IC1005)

23

LRCKI

I

L/R sampling clock signal (44.1 kHz) input from the D/A converter (IC1006), A/D converter 
(IC1005)

24

XBCKI

I

Bit clock signal (2.8224 MHz) input from the D/A converter (IC1006), A/D converter (IC1005)

25

ADDT

I

Recording data input terminal    Not used (fixed at “L”)

26

DADT

O

Playback data output terminal    Not used (open)

27

LRCK

O

L/R sampling clock signal (44.1 kHz) output terminal    Not used (open)

28

XBCK

O

Bit clock signal (2.8224 MHz) output terminal    Not used (open)

29

FS256

O

Clock signal (11.2896 MHz) output terminal    Not used (open)

30

DVDD

—

Power supply terminal (+3.3V) (digital system)

31 to 34

A03 to A00

O

Address signal output to the D-RAM (IC152)

35

A10

O

Address signal output to the D-RAM (IC152)

36 to 40

A04 to A08

O

Address signal output to the D-RAM (IC152)

41

A11

O

Address signal output to the external D-RAM    Not used (open)

42

DVSS

—

Ground terminal (digital system)

43

XOE

O

Output enable signal output to the D-RAM (IC152)    “L” active

* I (S) stands for schmitt input, I (A) for analog input, O (3) for 3-state output, and O (A) for analog output in the column I/O.