Sony MDX-C5970R service manual 67

Pin No.

Pin Name

I/O

Function

47

UNIREQ

O

Data request signal output terminal (for SONY bus)

“H”: request on Not used (open)

48

UNICKIO

I/O

Serial clock signal input from the master controller (IC700) or serial clock signal output to the

SONY bus interface (IC600) and master controller (IC700) (for SONY bus)

49

UNISI

I

Serial data input from the SONY bus interface (IC600)

50

UNISO

O

Serial data output to the SONY bus interface (IC600)

51

MD-CKO

O

Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

52

MD-SI

I

Reading serial data signal input from the CXD2652AR (IC301)

53

NCO

O

Not used (open)

54

SENS

I

Internal status (SENSE) input from the CXD2652AR (IC301)

55

CC-XINT

I

Interrupt status input from the CXD2652AR (IC301)

56

LIMIT-IN

I

Detection input from the sled limit-in detect switch

The optical pick-up is inner position when “L”

57

EJT-KEY

I

Eject request signal input terminal

“L”: eject on

Not used (fixed at “H”)

58

ERROR-PWM

O

PWM error monitor output terminal (C1and ATER is output when test mode)

Not used (open)

59

MD-RST

O

Reset signal output to the PCM1718E (IC101), CXD2652AR (IC301) and BH6511FS (IC303)

“L”: reset

60

BU-IN

I

Battery detect signal input from the SONY bus interface (IC600) and battery check circuit

“H”: battery on

61

BUS-ON

I

SONY bus on/off control signal input from the master controller (IC700) “L”: bus on

62

SQSY

I

Subcode Q sync (SCOR) input from the CXD2652AR (IC301)

“L” is input every 13.3 msec

Almost all, “H” is input

63

C-SW

I

Inputs the disc loading start or disc eject completion detect switch detection signal

“L”: When start or eject completed of the disc loading operation

64

MD-LAT

O

Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

65

MD-ON

O

Power supply on/off control signal output of the MD mechanism deck section main power supply

“H”: power on

66

DEEMP

O

Emphasis on/off control signal output to the PCM1718E (IC101) “H”: emphasis on

67

A-MUTE

O

Audio muting on/off control signal output terminal

68

NCO

O

Not used (open)

69

TSTCKO

O

Output of clock signal for the test mode display Not used (open)

70

TSTSO

O

Output of data for the test mode display Not used (open)

71

TSTMOD

I

Setting terminal for the test mode

“L”: test mode, “H”: normal mode

72

VCC

—

Power supply terminal (+5V)

73

NIL

I

Not used (fixed at “H”)

74 to 77

TOUT0 to TOUT3

O

⋅

Not used (open)

Output of the 4 8 matrix test keys

78 to 80

TIN0 to TIN2

I/O

⋅

8 matrix test keys (“L” is always output, except in test mode)

Not used (open)

Input of the 4

*1 Loading motor (M903) control

Terminal

Operation

IN

OUT

BRAKE

STOP

LOAD (pin 6)

“H”

“L”

“H”

“L”

EJECT (pin 7)

“L”

“H”

“H”

“L”

– 67 –