CDP-XB820 - Sony Audio Service Manual (repair manual). Page 15

– 15 –

Pin No.

Pin Name

I/O

Function

36

MODEL.SEL2

I

Destination setting terminal (fixed at “L”)

37

AVSS

—

Ground terminal (for A/D converter)

38

RST

I

System reset signal input from the reset signal generator (IC930)    “L”: reset                                   
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

39

EXTAL

I

Main system clock input terminal (8 MHz)

40

XTAL

O

Main system clock output terminal (8 MHz)

41

VSS

—

Ground terminal

42

TX

O

Sub system clock output terminal    Not used (open)

43

TEX

I

Sub system clock input terminal    Not used (fixed at “L”)

44

VDD (+5V)

—

Power supply terminal (+5V)

45

VFDP (–30V)

—

Power supply terminal (–30V) (for FL drive)

46

XSEL

O

Not used (open)

47

REINIT

O

Not used (open)

48

RFGF

O

Laser power hold control signal output to the CXA2568M (IC103)    “H”: hold on

49 to 66

OPEN

O

Not used (open)

67 to 87

S21 to S1

O

Segment drive signal output to the fluorescent indicator tube (FL801)    “H”: goes on

88

1G

O

Grid drive signal output to the fluorescent indicator tube (FL801)    “H”: goes on

89

VDD (+5V)

—

Power supply terminal (+5V)

90 to 100

2G to 12G

O

Grid drive signal output to the fluorescent indicator tube (FL801)    “H”: goes on