Sony MCE-CX80K, Service Manual

34

6-15.

IC  PIN  FUNCTION  DESCRIPTIONS

 • VIDEO BOARD  IC502  M30620MA-2A1FP

 (CD MECHANISM CONTROLLER)

Pin No.

Pin Name

I/O

Function

1

SENSE

I

Internal status (SENSE) signal input from the CXD2545Q (IC101)

2

SENSE CLK

O

Sense serial data reading clock signal output to the CXD2545Q (IC101)

3

DSP DATA

O

Serial data output to the CXD2545Q (IC101)

4

DSP LATCH

O

Serial data latch pulse output to the CXD2545Q (IC101)

5

DSP CLK

O

Serial data transfer clock signal output to the CXD2545Q (IC101)

6

TSENS

I

Disc tray status detection signal input terminal

7

REMOTE IN

I

Remote control signal input from the remote control receiver (IC802)

8

BYTE

I

External data bus line byte selection signal input    “L”: 16 bit, “H”: 8 bit (fixed at “L”)

9

VSS

—

Ground terminal

10

DSP MUTE

O

Muting on/off control signal output to the CXD2545Q (IC101)    “H”: muting on

11

CTRL1

O

RF equalizer selection signal output terminal    “L”: double speed

12

XRESET

I

Reset signal input from the reset signal generator (IC903)    “L”: reset
For several hundreds msec. after the power supply rises “L” is input, then it changes to “H”

13

XOUT

O

Main system clock output terminal (10 MHz)

14

VSS

—

Ground terminal

15

XIN

I

Main system clock input terminal (10 MHz)

16

VCC

—

Power supply terminal (+5V)

17

NMI

I

Non-maskable interrupt input terminal (fixed at “H” in this set)

18

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2545Q (IC101)

19

DSENS

I

Disc status detection signal input terminal

20

CL680 HINT

I

Interrupt request signal input from the MPEG video/audio decoder (IC505)

21

CL680 SEL

O

Command selection signal output to the MPEG video/audio decoder (IC505)

22

DF LATCH

O

Serial data latch pulse output to the D/A converter (IC509)    “L” active

23

CL680 HRDY

I

Ready status detection signal input from the MPEG video/audio decoder (IC505)

24

CL680 RESET

O

Reset signal output to the MPEG video/audio decoder (IC505)    “L”: reset

25

JOG1

I

26

JOG2

I

27

CTRL2

O

RF equalizer selection signal output terminal    “H”: double speed

28

LDON

O

Laser on/off selection signal output to the CXA1821M (IC103)    “H”: laser on

29

CLK

I/O

Communication data reading clock signal input or communication data transfer clock signal
output terminal    Not used (fixed at “H”)

30

DATA

I/O

Communication data input or communication data output terminal    Not used (pull up)

31

DATA1O

O

Serial data output to the MPEG video/audio decoder (IC505), D/A converter (IC509) and 
fluorescent indicator tube driver (IC801)

32

DATA1I

I

Serial data input from the MPEG video/audio decoder (IC505)

33

CLK1

O

Serial data transfer clock signal output to the MPEG video/audio decoder (IC505), D/A converter 
(IC509) and fluorescent indicator tube driver (IC801)

34

      RTS1              I/O

Dedicated fo writing flash ROM

35

XVLEVEL DOWN

O

Video output level control signal output to the MPEG video/audio decoder (IC505)

36

SUBQ DATA

I

Sub-code Q data input from the CXD2545Q (IC101)

37

SUBQ CLK

O

Sub-code Q data reading clock signal output to the CXD2545Q (IC101)

38

P.ON

O

Power on/off control signal output terminal    “L”: standby, “H”: power on

39

BUS XRDY

I

Ready signal input terminal    Not used (fixed at “H”)

40         SHARPNESS          O

Sharpness control signal output of the video signal (Y signal)    “H” active (“L”: normal)

41

BUS XHOLD

I

Hold signal input terminal    Not used (fixed at “H”)

42, 43

BUS

O

Not used (open)

44

SHIMUKE

I

Destination setting terminal    “L”: Chinese, “H”: English

Rotary encoder jog dial pulse input terminal 1

Rotary encoder jog dial pulse input terminal 2