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— 17 —

Pin Name

K3

K4

K5

ADJ/AFJ

IN/OUT SW

SCLK

PRGL

CLK

SENSE

DATA

SQCK

SUBQ

TEST

SEL 1

SEL 0

RMIN

TIMER

TEST

TEST

SCOR

AMUTE

LDON

XLT

LOAD OUT

LOAD IN

DOUT

DMUTE

D0

D1

D2

D3

V

DD

NC

D4

D5

D6

D7

A0

A1

A2

Pin No.

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

I/O

I

I

I

I

I

O

O

O

I

O

O

I

O

I

I

I

I

O

O

I

O

O

O

O

O

O

O

I/O

I/O

I/O

I/O

I

–

I/O

I/O

I/O

I/O

O

O

O

Function

Key data input (A/D input). When the key is not pressed: “H” (Connected to +5V)

Key data input (A/D input). When the key is not pressed: “H”

Model distinction (Connected to +5V)

Test mode input. The equipment is fixed at “H”

Disc lid Open/Close

Serial read out data read out clock output to CXD2515AQ

Program latch to digital filter

Serial data transfer clock output to CXD2515AQ, CXD8504M

SENSE signal input from CXD2515AQ

Serial data output to CXD2515AQ, CXD8504M

Sub code Q read out clock output to CXD2515AQ

Sub code Q data input from CXD2515AQ

Not used (Open)

Model distinction (Connected to Ground)

Remote contrl signal input

Not used (Connected to +5V)

Not used (Open)

Sub code sync input from CXD2515AQ. Start to read out the sub code receiving this signal

Analog mute output. “H” mute on

Laser diode ON/OFF control output “H”: ON

Serial data latch output to CXD2515AQ

Output to rotate loading motor in the loading out direction. “H”: OUT (Open)

Output to rotate loading motor in the loading in direction. “H”: IN (Open)

Digital output ON/OFF control output

Muting control output

Input and output of data signal with S. RAM (LH5160T4)

Power supply terminal (+5V)

Connected to +5V

Input and output of data signal with S. RAM (LH5160T4)

Address signal output to S. RAM (LH5160T4)

— 18 —

!¶

The disc must not move nor sway when the disc lid opens. These
problems however occur in the actual case due to the offset volt-
age generated and the voltage generated because of the positional
relation between the BSL coil and Hall element.
The BSL (IC104, IC105) driver is therefore muted while the lid is
open.

@¡

This port is required because the display tube in this set static-
lights up and a dedicated screwdriver is required.
It is basically a RESET pin. But as problems will occur if used
also as RESET , timings are specially provided using the micro-
processor.

— 37 —

NOTE:

• 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 number in

the exploded views are not supplied.

• Hardware (# mark) list and accessories and pack-

ing materials are given in the last of this parts list.

The components identified by
mark 

! or dotted line with mark

! are critical for safety.
Replace only with part number
specified.

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

4-960-910-21 SCREW, ORNAMENTAL

2

4-979-021-01 PLATE (A), TOP

3

4-979-026-01 PLATE (B), ORNAMENTAL

4

4-960-910-11 SCREW, ORNAMENTAL

5

4-979-028-01 WINDOW, DISC

6

4-979-039-01 HOLDER (R)

7

4-979-027-01 PLATE (F), ORNAMENTAL

* 8

4-927-881-01 SHEET, ADHESIVE

9

4-924-233-01 INDICATOR

10

4-979-030-01 SLIDER

11

4-979-045-01 SLIDER (B)

12

4-979-020-01 PLATE (B), TOP

13

4-979-025-01 PLATE (D), ORNAMENTAL

14

4-979-031-01 BUTTON, CONTROL

* 15

A-4673-795-A KEY BOARD, COMPLETE

16

4-979-043-01 PULLEY, DISK

17

4-980-533-01 DAMPER (B)

not supplied

not supplied

not supplied

#1

#1

#1

#1

#2

#2

A

B

C

B

A

C

not
supplied

#15

#15

#15

#15

— 38 —

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

60

4-948-375-01 SPRING (F), COIL

* 61

A-4673-793-A SERVO BOARD, COMPLETE

62

4-979-041-01 BOSS (M)

63

1-776-183-11 WIRE (FLAT TYPE)

64

1-776-182-11 WIRE (FLAT TYPE)

* 65

4-971-241-01 CUSHION (FLT)

* 66

4-969-510-01 HOLDER (FL)

FL801

1-517-357-11 INDICATOR TUBE, FLUORESCENT

51

3-910-074-31 BOLT (M3)

52

4-979-033-01 PANEL, FRONT

53

4-979-042-01 WINDOW, INDICATION

54

X-4946-608-1 BUTTON ASSY, POWER

55

4-960-910-21 SCREW, ORNAMENTAL

56

4-979-034-01 PANEL, SIDE

* 57

A-4673-794-A DISPLAY BOARD, COMPLETE

* 58

1-659-241-11 AC SW BOARD

* 59

A-4673-792-A S POWER BOARD, COMPLETE

not supplied

not supplied

not supplied

#1

BU-12A

#14

#14

#4

#1

FL801

#1

#1

#1

#1

#3