CDP-CX57 - Sony Audio Service Manual (repair manual). Page 42

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42

MUTER

O

Line muting on/off control signal output terminal (for R-ch side)    “H”: muting on

43

XVDD

—

Power supply terminal (+5V) (crystal oscillator system)

44

XOUT

O

System clock output terminal (16.9344 MHz)

45

XIN

I

System clock input terminal (16.9344 MHz)

46

XVSS

—

Ground terminal (crystal oscillator system)

47

SBSY

O

C1, C2, single correction, and double correction monitor output to the CD text decoder (IC104)

48

EFLG

O

Subcode P to W output terminal

49

PW

O

Subcode frame sync signal output to the CD text decoder (IC104)

50

SFSY

O

Write frame clock signal output to the CD text decoder (IC104)

51

SBCK

I

Subcode reading clock signal input from the CD text decoder (IC104) (schmitt input)

52

FSX

O

7.35 kHz sync signal output divided from the crystal oscillation

53

WRQ

O

Subcode Q synchronizing signal output to the system controller (IC501)

54

RWC

I

Command chip enable signal input from the system controller (IC501) (schmitt input)

55

SQOUT

O

Subcode Q data output to the system controller (IC501)

56

COIN

I

Command serial data input from the system controller (IC501)

57

CQCK

I

Command serial clock signal input from the system controller (IC501) (schmitt input)                     
Fetching clock input or subcode extracting clock input from SQOUT (pin %

∞

)

58

RES

I

System reset signal input from the reset signal generator (IC201)    “L”: reset                                   
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

59

TEST11

O

Test output terminal    Not used (open)

60

16M

O

Master clock signal (16.9344 MHz) output to the CD text decoder (IC104)

61

4.2M

O

Reference clock signal (4.2336 MHz) output to the RF amplifier (IC102)

62

TEST5

I

Test input terminal (fixed at “L” in this set)

63

CS

I

Chip select signal input terminal    Not used (fixed at “L”)

64

TEST1

I

Test input terminal (fixed at “L” in this set)