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– 45 –

•

1 to 3

—

O

Not used (open)

4

CH.F

O

Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)    *1

5

CH.R

O

Motor drive signal (save direction) output to the chucking motor drive (IC52)    *1

6

LOAD2

I

Chucking end detect switch (SW11) input
“L”: When completion of the disc chucking operation

7

LOAD1

I

Save end detect switch (SW12) input
“L”: When completion of the disc chucking operation

8

SENS2

I

Internal status signal (sense signal) input from the CXA1992AR (IC11)

9

LIM.SW

I

Sled limit in detect switch (SW1) input
“L”: When the optical pick-up is inner position

10

EE.INIT

I

Initialize signal input for the EEPROM (IC202)    “H”: format    Fixed at “L” in this set

11

EE.CLK

O

Serial data transfer clock signal output to the EEPROM (IC202)

12

EE.DATA

I/O

Two-way data bus with the EEPROM (IC202)

13 to 19

—

O

Not used (open)

20

SINGLE

I

Setting terminal for the single disc/multiple discs mode
“L”: single mode, “H”: multiple discs mode (fixed at “H”)

21

XRST

O

System reset signal output to the CXA1992AR (IC11), CXD2530Q (IC101) and SM5852FS
(IC102)    “L”: reset

22

FOK

I

Focus OK signal input from the CXA1992AR (IC11)    “L”: NG, “H”: OK

23

SENS

I

Internal status signal (sense signal) input from the CXD2530Q (IC101)

24

GFS

I

Guard frame sync signal input from the CXD2530Q (IC101)    “L”: NG, “H”: OK

25

GRSRT

O

Reset signal output to the CXD2522Q (IC401)    “L”: reset

26

XQOK

O

Subcode Q OK pulse signal output to the CXD2522Q (IC401)    “L” active

27

SDTI

I

ESP status signal input from the CXD2522Q (IC401)

28

XSOE

O

ESP status read enable signal output to the CXD2522Q (IC401)    “L” active

29

ESPXLT

O

ESP latch pulse signal output to the CXD2522Q (IC401)    “L” active

30

RST

I

31

EXTAL

I

Main system clock input terminal (8 MHz)

32

XTAL

O

Main system clock output terminal (8 MHz)

33

VSS

—

Ground terminal

34

TX

O

Sub system clock output terminal    Not used (open)

35

TEX

I

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

36

AVSS

—

Ground terminal (for A/D converter)

37

AVREF

I

Reference voltage (+5V) input terminal (for A/D converter)

38

MCK

I

Input of signal for the fine adjustment (linear position sensor adjustment; RV201) of elevator
position (A/D input)

39

EHS

I

Elevator height position detect input from the RV202 (elevator height sensor) (A/D input)

40

H.TEMP

I

High temperature sensor input terminal    Not used (open)

41

XRDE

O

D-RAM read enable signal output to the CXD2522Q (IC401)    “L” active

42

XWRE

O

D-RAM write enable signal output to the CXD2522Q (IC401)    “L” active

43

A.MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

44

EMP

O

Emphasis mode output to the D/A converter (IC601)    “H”: emphasis on

45

ML

O

Fast speed dubbing control signal output to the D/A converter (IC601)    “L”: fast speed

46

GRSCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2522Q (IC401)

47

D/A.RESET

O

Reset signal output terminal    “L”: reset    Not used (open)

System reset signal input from the SONY bus interface (IC302) and reset signal generator
(IC304)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

– 46 –

48

SCK

I

Serial data transfer clock signal input from the SONY bus interface (IC302)

49

SI

I

Serial data input from the SONY bus interface (IC302)

50

SO

O

Serial data output to the SONY bus interface (IC302)

51

SCLK

O

Subcode Q data reading clock signal output to the CXD2530Q (IC101)

52

SUBQ

I

Subcode Q data input from the CXD2530Q (IC101)

53

—

O

Not used (open)

54

C.OUT

I

Track number count signal input from the CXA1992AR (IC11)

55

BUS.ON

I

Bus on/off control signal input from the SONY bus interface (IC302)    “H”: bus on

56

A/D.SW

O

Analog/digital out selection signal output terminal    “L”: digital out    Not used (open)

57

MGLK

I

Magazine eject operation completion detect switch (SW201) input    “L”: eject completed

58

ELV.F

O

Motor drive signal (elevator up direction) output to the elevator motor drive (IC301)    *2

59

—

O

Not used (open)

60

MAG.SW

I

Magazine in/out detect switch (SW202) input    “L”: magazine detected

61

BU.CHK

I

Battery detection signal input terminal    “H”: battery on

62

W.UP

I

Bus on or eject switch (SW301) input terminal    “H”: bus on or eject switch pushing

63

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2530Q (IC101)

64

EJECT

I

Eject switch (SW301) input terminal    “H” active

65

CD.CLK

O

Serial data transfer clock signal output to the CXD2530Q (IC101) and CXD2522Q (IC401)

66

CD.XLT

O

Serial data latch pulse signal output to the CXD2530Q (IC101)

67

CD.DATA

O

Serial data output to the CXD2530Q (IC101) and CXD2522Q (IC401)

68

CD.ON

O

D/A converter and servo section power supply on/off control signal output    “H”: power on

69

ELV.ON

O

Mechanism deck section power supply on/off control signal output    “H”: power on

70

ELV.R

O

Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)    *2

71

—

O

Not used (open)

72

VDD

—

Power supply terminal (+5V)

73

NC (VDD)

—

Connected to the power supply (+5V)

74

MODE1

O

D-BASS control signal output to the SM5852FS (IC102)    “L” active

75

MODE2

O

D-BASS control signal output to the SM5852FS (IC102)    “L” active

76

REQ

O

Data request signal output terminal    Not used (open)

77

CCCLK

O

Command clock signal output terminal    Not used (open)

78

CSI

O

Command data input terminal    Not used (open)

79

CSO

O

Command data output terminal    Not used (open)

80

ADJ

O

Auto adjust selection terminal    Not used (open)

*1  chucking motor (M103) control

                           MODE

 TERMINAL

CH.F (pin 4)

“H”

“L”

“H”

“L”

CH.R (pin 5)

“H”

“H”

“L”

“L”

STOP

LOAD

CHUCKING

SAVE

BRAKE

*2  elevator motor (M104) control

                           MODE

 TERMINAL

ELV.F (pin %•)

“H”

“L”

“H”

“L”

ELV.R (pin &º)

“H”

“H”

“L”

“L”

STOP

ELEVATOR

UP

ELEVATOR

DOWN

BRAKE

– 47 –

Les composants identifiés par une
marque 

! sont critiquens pour la

sécurité.
Ne les remplacer que par une pièce
portant le neméro spécifié.

The components identified by
mark 

! or dotted line with mark

! are critical for safety.

Replace only with part number
specified.

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list and accessories and

packing materials are given in the last of the
electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

3-010-104-01 DAMPER (250)

* 2

3-010-097-01 CASE (LOWER)

3

1-664-628-11 JACK FLEXIBLE BOARD

* 4

1-668-857-11 JACK BOARD

5

X-3373-217-1 DOOR ASSY

6

X-3373-986-1 ARM (FR) ASSY

7

3-010-098-81 PANEL, FRONT

8

3-012-388-01 SCREW (M2X3)

* 9

3-010-105-01 ESCUTCHEON

* 10

3-010-106-01 BUTTON (EJ) (

6)

* 11

3-010-107-01 HEAT SINK

12

3-010-103-01 SPRING (FL), TENSION

13

3-010-101-01 LEVER (FL)

* 14

3-010-096-01 CASE (UPPER)

* 15

A-3313-512-A MAIN BOARD, COMPLETE

16

1-664-627-11 MAIN FLEXIBLE BOARD

17

3-350-124-01 CUSHION (EJECT)

18

X-3373-215-1 ARM (FL) ASSY

19

3-918-103-11 SCREW

* 22

3-013-658-01 SHEET (FJ), PROTECTION

24

3-376-464-11 SCREW(+PTT 2.6X6), GROUND POINT

25

4-941-475-01 CUSHION, BATTERY

MG-250B-137

#1

#9

#2

#2

#2

#2

#2

#3

– 48 –

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

51

4-965-759-01 WASHER, POLYETHYLENE

* 52

X-3373-239-1 SLIDER (R) ASSY

53

3-010-244-01 SPRING (STOPPER. UPPER)

* 54

X-3373-243-1 CASE (UPPER) ASSY

55

3-010-217-01 SPRING (EJ), TENSION

* 56

3-010-162-01 LEVER (EJECT)

* 57

3-011-998-01 BRACKET (STOPPER. UPPER)

* 58

3-010-240-01 SLIDER (L)

59

3-011-997-01 SPRING (STOPPER. LOWER)

60

3-014-603-01 WASHER

61

3-736-073-01 SLIDER, POLYETHYLENE

62

3-701-438-21 WASHER, THRUST

63

3-578-224-00 WASHER

66

3-013-503-01 SPRING (EJ1), TENSION

#6

#6

#6

#5

#12