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17

Pin No.

Pin Name

I/O

Description

52

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD3017Q (IC101)

53

GRSCOR

I

Subcode sync (S0+S1) detection signal input terminal    Not used (open)

54

NC

O

Not used (open)

55

HS

O

Normal/high speed playback control signal output terminal
“L”: high speed playback    Not used (open)

56

SQSO

I

Subcode Q data input from the CXD3017Q (IC101)

57

NC

O

Not used (open)

58

SQCK

O

Subcode Q data reading clock signal output to the CXD3017Q (IC101)

59

CDCLK

O

Serial data transfer clock signal output to the CXD3017Q (IC101)

60

CDLAT

O

Serial data latch pulse signal output to the CXD3017Q (IC101)

61

CDDAT

O

Serial data output to the CXD3017Q (IC101)

62

XRST

O

System reset signal output to the CXD3017Q (IC101)    “L”: reset

63

XQOK

O

Subcode Q OK pulse signal output terminal    Not used (open)

64

XRDE

O

D-RAM read enable signal output terminal    Not used (open)

65

XWRE

O

D-RAM write enable signal output terminal    Not used (open)

66

EMPH

O

Emphasis control signal output to the CXD3017Q (IC101)    “H”: emphasis on

67

MUTE

O

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

68

RAMA10

O

Address signal output to the S-RAM    Not used (open)

69

RAMCS

O

Chip select enable output to the S-RAM    Not used (open)

70 to 74

RAMIO7 to 

RAMIO3

I/O

Two-way data bus with the S-RAM    Not used (open)

75

RESET

I

System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC303) 
“L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

76

RAMIO2

I/O

Two-way data bus with the S-RAM    Not used (open)

77

X1A

O

Sub system clock output terminal    Not used (open)

78

X0A

I

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

79

VSS

—

Ground terminal

80

X0

I

Main system clock input terminal (4 MHz)

81

X1

O

Main system clock output terminal (4 MHz)

82

VCC

—

Power supply terminal (+3.3V)

83, 84

RAMIO1, RAMIO0

I/O

Two-way data bus with the S-RAM    Not used (open)

85 to 88

RAMA0 to RAMA3

O

Address signal output to the S-RAM    Not used (open)

89

SINGLE

I

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

90

6/10 SEL

I

Setting terminal for the 6 discs changer/10 discs changer model
“L”: 10 discs changer model, “H”: 6 discs changer model    Not used (open)

91

CFSEL

I

Custom file on/off setting terminal    “L”: custom file on    Not used (fixed at “H”)

92

TEXTSEL

I

CD text mode setting terminal
“L”: CD text on, “H”: does not display track name    Not used (fixed at “H”)

93

ESPSEL

I

ESP mode setting terminal    “L”: ESP on    Not used (open)

94

TEST

I

Test on/off setting terminal    “L”: test mode    Not used (fixed at “H”)

95

MAG SW

I

Magazine in/out detect switch input terminal    Not used (open)

96

SAVE SW

I

Save end detect switch (SW2) input terminal
“L”: When completion of the disc save operation

97

LOAD SW

I

Chucking end detect switch (SW1) input terminal
“L”: When completion of the disc chucking operation

18

Pin No.

Pin Name

I/O

Description

98

LIM SW

I

Sled limit in detect switch (SW3) input terminal
“L”: When the optical pick-up is inner position

99

RW SEL

O

CD-ROM/RW selection signal output    “L”: CD-RW, “H”: CD-ROM

100

RAMA4

O

Address signal output to the S-RAM    Not used (open)

*1  elevator motor (M104) control

STOP

ELEVATOR 

UP

ELEVATOR

DOWN

BRAKE

ELVF (pin 4)

“L”

“L”

“H”

“H”

ELVR (pin 3)

“L”

“H”

“L”

“H”

Mode

Terminal

*2  chucking motor (M103) control

STOP

LOAD

CHUCKING

SAVE

BRAKE

LOADF (pin 5)

“L”

“L”

“H”

“H”

LOADR (pin 6)

“L”

“H”

“L”

“H”

Mode

Terminal

19

Les composants identifiés par une
marque 0 sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.

The components identified by
mark 0 or dotted line with mark

0 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

3-047-852-01 DAMPER (T)

2

3-045-543-81 CASE (LOWER. T)

* 3

3-024-065-01 CUSHION (EJECT-T)

4

X-3375-357-1 ARM (FLT) ASSY

5

1-681-577-11 JACK BOARD

6

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

7

A-3283-194-A MAIN BOARD, COMPLETE

8

1-676-340-12 JACK FLEXIBLE BOARD

9

1-676-339-12 MAIN FLEXIBLE BOARD

10

1-681-578-11 SWITCH BOARD

12

X-3379-707-1 DOOR (L) ASSY (646)

12

X-3380-045-1 DOOR (L) ASSY (646X)

13

3-224-392-01 PANEL (L), FRONT (646)

13

3-224-392-11 PANEL (L), FRONT (646X)

14

3-022-007-02 BUTTON (EJT) (Z)

15

3-041-218-21 ESCUTCHEON (T)

* 16

3-022-012-01 HEAT SINK (T)

17

3-042-244-11 SCREW (T)

18

3-038-166-01 SPRING (FL), TENSION COIL

19

3-047-886-11 LEVER (FLT. 838)

20

3-046-160-81 CASE (UPPER. T)

22

3-935-636-11 SCREW (FP)

23

X-3375-360-2 ARM (FRT) ASSY

RV202

1-227-137-11 RES, VAR, SLIDE 10K

(ELEVATOR HEIGHT SENSOR)

#2

#3

#2

#2

#2

MG-251B-137

RV202

#3

#3

not supplied

not supplied

not supplied

B

A

#2

A

B

20

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

101

X-3378-091-1 CHASSIS (U. S) SUB ASSY

102

3-024-161-01 SPRING (SUT)

103

3-011-997-01 SPRING (STOPPER. LOWER)

#3

#3

#3