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– 57 –

   

1

A3

O

2

A4

O

3

A5

O

4

A6

O

5

A7

O

6

A8

O

7

A9

O

8

A10

O

9

A11

O

10

A12

O

11

WE

O

Write enable signal output to the static RAM (IC202)

12

NC

O

Not used (open)

13

NC

O

Not used (open)

14

LED-PLAY

O

( LED (D871) drive signal output terminal    “H”: LED on

15

LED-PAUSE

O

P LED (D872) drive signal output terminal    “H”: LED on

16

LED-FILTER

O

FILTER LED (D873) drive signal output terminal    “H”: LED on

17

SPDL-MUTE

O

Mute signal output to the spindle motor driver (IC104, 105)

18

SHIFT-ON/OFF

O

Reset signal output to the CXD2562Q-CS (IC603)    “L”: reset

19

VOL UP

O

Volume up control signal output to the volume control motor driver (IC350)

20

VOL DOWN

O

Volume down control signal output to the volume control motor driver (IC350)

21

BLANK

O

Blank signal output to the fluorescent indicator tube driver (IC801 to IC803)

22

FL D0

O

Serial data output to the fluorescent indicator tube driver (IC803)

23

FL D1

O

Serial data output to the fluorescent indicator tube driver (IC802)

24

FL D2

O

Serial data output to the fluorescent indicator tube driver (IC801)

25

FL CLK

O

Serial data transfer clock signal output to the fluorescent indicator tube driver (IC801 to
IC803)

26

FL WR

O

Read/write select signal output to the fluorescent indicator tube driver (IC801 to IC803)

27

SENSER SW

O

On/off control signal output to the stabilizer detect sensor (IC261)    “H”: on

28

SENSER

I

Detect signal input from the stabilizer detect sensor (IC261)    “H”: on

29

LIMIT OUT

I

Detection input from the sled limit-out detect switch (S21)
The optical pick-up is outer position when “L”

30

RESET

I

System reset signal input from the reset signal generator (IC91)    “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

31

XTALI

I

Main system clock input terminal (4 MHz)

32

XTALO

O

Main system clock output terminal (4 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 input terminal (+5V)

38

K0

I

Key input terminal (A/D input)    ERASE key (S850) input

39

K1

I

Key input terminal (A/D input)
FILE, EDIT/TIME FADE, TIME, REPEAT, P MODE keys (S851 to S855) input

40

K2

I

Key input terminal (A/D input)
CHECK, CLEAR, FILTER, 

0, ) , PUSH ENTER keys (S884 to S888, RV870) input

Address signal output to the static RAM (IC202)

– 58 –

41

K3

I

Key input terminal (A/D input)
§ OPEN/CLOSE, (,  P, p keys (S889 to S892) input

42

K4

I

Rotary encoder input terminal (A/D input)    AMS 

± key (RV870) input

43

K5

I

Rotary encoder input terminal (A/D input)    AMS 

≠ key (RV870) input

44

ADJ/AFJ

I

Setting terminal for the test mode    “L” active

45

IN/OUT SW

I

Detection input from the loading in/out detect switch (S281, S282)  (A/D input)

46

SCLK

O

Sense serial data reading clock signal output to the CXD2545Q (IC101)

47

PRGL

O

Serial data latch pulse signal output to the CXD8679Q (IC601)

48

CLK

O

Serial data transfer clock signal output to the CXD2545Q (IC101) and CXD8679Q (IC601)

49

SENSE

I

Internal status (SENSE) signal input from the CXD2545Q (IC101)

50

DATA

O

Serial data output to the CXD2545Q (IC101) and CXD8679Q (IC601)

51

SQCK

O

Sub-code Q data reading clock signal output to the CXD2545Q (IC101)

52

SUBQ

I

Sub-code Q data signal input from the CXD2545Q (IC101)

53

TEST

O

Output terminal for the test    Not used (open)

54

SEL1

I

Destination setting terminal (fixed at “L”)

55

SEL0

I

Destination setting terminal (fixed at “L”)

56

RMIN

I

Remote control signal input from the remote control receiver (IC804)

57

TIMER

I

Timer control input terminal    Not used (fixed at “H”)

58

TEST

O

Output terminal for the test    Not used (open)

59

TEST

O

Output terminal for the test    Not used (open)

60

SCOR

I

Sub-code sync (S0+S1) detection signal input from the CXD2545Q (IC101)

61

AMUTE

O

Muting control signal output to the analog mute driver and mute relay driver

62

LDON

O

Laser diode on/off selection signal output to the RF amplifier in optical pick-up

63

XLT

O

Serial data latch pulse signal output to the CXD2545Q (IC101)

64

LOAD OUT

O

Loading motor (M271) drive signal output to the LB1641 (IC203)    *1

65

LOAD IN

O

Loading motor (M271) drive signal output to the LB1641 (IC203)    *1

66

DOUT

O

Digital out on/off control signal output to the CXD2545Q (IC101)

67

DMUTE

O

Muting control signal output to the CXD2545Q (IC101) and CXD8679Q (IC601)

68

D0

I/O

69

D1

I/O

70

D2

I/O

71

D3

I/O

72

VDD

—

Power supply terminal (+5V)

73

NC

I

Not used (fixed at “H”)

74

D4

I/O

75

D5

I/O

76

D6

I/O

77

D7

I/O

78

A0

O

79

A1

O

Address signal output to the static RAM (IC202)

80

A2

O

Two-way data bus with the static RAM (IC202)

Two-way data bus with the static RAM (IC202)

*1

Loading motor (M271) control

LOAD OUT (pin ^¢)

“L”

“H”

“L”

“H”

LOAD IN (pin ^∞)

“L”

“L”

“H”

“H”

OFF

OUT

I N

BRAKE

Operation

Terminal

– 59 –

GLout pin
output waveform

SPDL-MUTE (pin !¶)
From the viewpoint of performance of the set, the disc must
not move nor sway when the disc table opens. These
problems however occur in the actual case due to the offset
voltage generated and the voltage generated because of the
positional relation between the BSL coil and Hall element.
The spindle motor driver (IC104, IC105) is therefore muted
while the tray is open.  Pin !¶ provides the timing for this.

H

L

OPEN

Reverses after a
certain period of time.

SP MUTE

(MUTE ON)

CLOSE

SPINDLE

KICK

Reverses after a
certain period of time.

PLAY

Time while the disc
can be seen
(Estimate).

The spindle
motor driver is
muted during
this time.

BLANK (pin @¡)
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.

SENSER SW (pin @¶)
As IC261 IS471F operate in pulse as shown in the figure, the
sound quality may be affected if operated constantly. As the
purpose of IC261 is to detect if the presence of the stabilizer,
it should be operated only when the tray is drawn in. IC261
operates as it is “H” only at this time.  Normally it is “L”.

Ee

0

Eep

Eed

Time

Eep is the luminance of the signal light tuned with the low
level timing of the GLout pin output.
Eed is the luminance of the D.C. light. The light source is

the infrated-emitting diode (

λ

p=940 nm).

*

SENSER (pin @•)
The results of the detection of IC261 IS471F is output to this
pin. It becomes “ L” when there is no stabilizer (when light
reaches). The next process of imposing the next focus is not
performed.  (Effective only when pin @¶ is “H”.)
Therefore, it must be noted that if PLAY is performed when
the servo board at the top of the CDM is not assembled
properly, the detection circuit operates and this pin does not
operate.
It is does not operate, refer to 1. SERVICING NOTES ” Prep-
arations for Adjustment and Measurement” on page 3.

– 60 –

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)

↑

           Cabinet's Color

• 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 are

given in the last of the electrical parts list.

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

4-970-998-01 BOLT (LID), HEXAGON HOLE (BLACK)

1

4-970-998-11 BOLT (LID), HEXAGON HOLE (GOLD)

2

4-969-832-01 PLATE, INDICATION

3

4-969-830-21 PANEL, LOADING (BLACK)

3

4-969-830-31 PANEL, LOADING (GOLD)

4

4-969-831-21 BASE, LOADING PANEL (BLACK)

4

4-969-831-31 BASE, LOADING PANEL (GOLD)

* 5

1-654-256-11 DISPLAY BOARD

6

4-951-620-41 SCREW (2.6), +BVTP (BLACK)

6

4-951-620-51 SCREW (2.6), +BVTP (GOLD)

7

4-929-074-01 SCREW (3X8)

8

4-976-827-01 SCREW, FLAT HEAD (BLACK)

8

4-976-827-11 SCREW, FLAT HEAD (GOLD)

9

4-969-823-01 PLATE (L), SIDE (BLACK)

9

4-969-823-11 PLATE (L), SIDE (GOLD)

10

4-972-439-01 SPACER (SCREW HEAD)

11

4-972-438-01 ABSORBENT, VIBRATION

12

4-969-821-01 CASE (TOP PLATE) (BLACK)

12

4-969-821-11 CASE (TOP PLATE) (GOLD)

* 13

A-4660-735-A REINFORCEMENT (TOP PLATE) ASSY

14

4-969-824-01 PLATE (R), SIDE (BLACK)

14

4-969-824-11 PLATE (R), SIDE (GOLD)

15

4-970-123-01 FOOT (F50180S)

16

4-970-124-01 CUSHION (F50180S)

18

4-969-834-01 FILTER

19

4-969-833-21 COVER, LOADING PANEL (BLACK)

19

4-969-833-31 COVER, LOADING PANEL (GOLD)

20

4-949-302-31 WASHER

22

4-972-440-01 SPACER

23

4-949-302-01 WASHER

The components identified by
mark 

0   or dotted line with

mark 

0 are critical for safety.

Replace only with part number
specified.

#3

#3

#1 (For gold)
#2 (For black)

not supplied

FRONT PANEL SECTION

not supplied

#2

not supplied

not

supplied