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– 21 –

Notes:
1. CD block basically constructed to operate without adjustment.  There-

fore, check each item in order given.

2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 M

Ω

 impedance.

4. Clean an object lens by an applicator with neutral detergent when the

signal level is low than specified value with the following checks.

Procedure:
1. Connect the oscilloscope to TP (FE) and TP (VC) on BD board.
2. Connect the TP (FEI) and TP (VC) with lead wire.
3. Turned power switch on.
4. Put disc (YEDS-18) in and turned power switch on again and

actuate the focus search.

5. Confirm that the oscilloscope waveform (S-curve) is symmetri-

cal between A and B.  And confirm peak to peak level within
3.0 ± 1.0 Vp-p.

6. After check, remove the lead wire connected in step 2.

Note: • Try to measure several times to make sure that the ratio of A : B

or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness

to obtain best waveform.

Procedure:
1. Connect the oscilloscope to TP (RF) and TP (VC) on BD board.
2. Turned power switch on. (stop mode)
3. Put disc (YEDS-18) in and press the  

·  button.

4. Confirm that the oscilloscope waveform is clear and check RF

signal level is correct or not.

Note: Clear RF signal waveform means that the shape “≈” can be clearly

distinguished at the center of the waveform.

A

B

symmetry

+
–

BD board

TP (RF)

TP (VC)

oscilloscope

(AC range)

When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.

Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on BD board.
2. Turned power switch on.
3. Connect the SL702 and SL703 on the VIDEO board with sol-

der.

4. Put disc (YEDS-18) in and press the 

·  button, and play the

number five track.

5. Press the  REPEAT  button. (The tracking servo and the sled-

ding servo are turned off.)

6. Confirm that the level B of the oscilloscope’s waveform and the

A (DC voltage) of the center of the traverse waveform.
Confirm the following:
A/B 

×

 100 = less than ±22 %

+
–

BD board

TP (FE)

TP (VC)

oscilloscope

+
–

BD board

TP (TE)

TP (VC)

oscilloscope

(DC range)

7. Press the  REPEAT  button. (The tracking servo and the sled-

ding servo are turned on.) Confirm that the C (DC voltage) is
almost equal to the A (DC voltage) is step 6.

8. After check, remove the soldering installed in step 3.

– 22 –

Procedure:
1. Connect the frquency counter to TP (PLCK) on the BD board.
2. Turned power switch on.
3. Put disc (YEDS-18) in and press the 

·  button, and play the

number five track.

4. Confirm that the reading on frequency counter is 4.3218 MHz.

 (SIDE-A)

+
–

TP (PLCK)

BD board

frequency counter

Procedure:
1. Connect the frequency counter to TP410 (DCLK) on VIDEO

board.

2. Turned power switch on.
3. Press the  FUNCTION  button to select the CD.
4. Adjust CT401 on the VIDEO board so that the frequency counter

reading 13.5 MHz ± 40 Hz at stop status.

 (SIDE-B)

+
–

TP410 (DCLK)

VIDEO board

frequency counter

TP410
(DCLK)

IC402

CT401

IC101

(FEI)

(FE)

(TE)

(VC)

(PLCK)

(RF)

IC103

– 23 –

µ

Pin No.

Pin Name

I/O

Function

1

TA-MUTE

O

Line mute control signal output terminal    “L”: mute on

2

DBFB-H/L

O

DBFB normal/high selection signal output terminal    “L”: DBFB high, “H”: DBFB low

3

427-LAT

O

Serial data latch pulse output to the electrical volume (IC201)

4

K-CON-LAT

O

Serial data latch pulse output to the key control (IC1401)

5

K-CON-ON

O

On/off selection signal output of the key control circuit    “L”: on

6

F-RELAY

O

Relay drive signal output for the main speaker (front speaker)    “H”: on

7

R-RELAY

O

Relay drive signal output terminal    Not used (open)

8

PL-RELAY

O

Relay drive signal output terminal    Not used (open)

9

TEST

I

Connected to ground

10

X2

O

Main system clock output terminal (5 MHz)

11

X1

I

Main system clock input terminal (5 MHz)

12

VDD

—

Power supply terminal (+5V)

13

XT2

O

Sub system clock output terminal (32.768 kHz)

14

XT1

I

Sub system clock input terminal (32.768 kHz)

15

RESET

I

System reset signal input from the reset signal generator (IC302)

“L ” : reset

For several

hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

16

(INT/IN)

I

Connected to ground

17

(INT/IN/OUT)

I

Connected to ground

18

SCOR

O

Subcode sync (S0+S1) detection signal input terminal    Not used (fixed at “L”)

19

SOFT-TEST

O

Output terminal for the software test (open)

20

AC-CUT

I

AC off detection signal input from the  reset signal generator (IC302)

21

RDS-INT

I

Serial data reading clock signal input for the radio data system    Not used (fixed at “L”)

22

RDS-DATA

I

Serial data input for the radio data system    Not used (open)

23

VDD

—

Power supply terminal (+5V)

24

AVDD

—

Power supply terminal (+5V) (for A/D conversion)

25

ADJ

I

Setting terminal for the test    Normally: “H”

26

A-SHUT

I

Shut off detection signal input from the deck-A reel pulse detector (Q1001)

27

B-SHUT

I

  Shut off detection signal input from the deck-B reel pulse detector (Q1002)

28

B-HALF

I

Detection input from the deck-B half detect switch (S1007)

29

CLK-CHECK

I

Not used (fixed at “L”)

30

SPEC-IN

I

Setting terminal for the version

31

ADJ2

I

Setting terminal for the test    Normally: “L”

32

DEMO-MODE

I

Setting terminal for the demonstration H/L   Fixed at “L”

33

AVSS

—

Ground terminal (for A/D conversion)

34

SQ-DATA-IN

I

Sub-code Q data input terminal    Not used (fixed at “L”)

35

—

—

Not used (open)

36

D.OUT ON/OFF

O

Power on/off selection signal output for the CD digital out optical    “H”: power on
Not used (open)

37

SW-ON/OFF

O

Not used (open)

38

FUNC1

I

Setting terminal for the function 1    Fixed at “L”

39

FUNC2

I

Setting terminal for the function 2    Fixed at “L”

40

VSS

—

Ground terminal

41

VOL-LAT

O

Serial data latch pulse output terminal    Not used (open)

42

PL-LAT

O

Serial data latch pulse output terminal    Not used (open)

43

COM-DIN

I

Serial data input terminal    Not used (fixed at “L”)

– 24 –

Pin No.

Pin Name

I/O

Function

44

COM-DOUT

O

Serial data output to the electrical volume (IC201) and key control (IC501)

45

COM-CLK

O

Serial data transfer clock signal output to the electrical volume (IC201) and key control (IC501)

46

CD-POWER

O

Power on/off selection signal output for the CD circuit    “H”: power on

47

CD-DATA

O

Serial data output terminal    Not used (open)

48

CD-CLK

O

Serial data transfer clock signal output terminal    Not used (open)

49

MSM-CND

O

Command data output terminal    Not used (open)

50

MSM-BUSY

I

Busy signal input terminal    “L”: busy    Not used (fixed at “L”)

51

MSM-LAT

O

Serial data latch pulse output terminal    Not used (open)

52

MSM-NAR

I

NAR signal output terminal    Not used (open)

53

MSM-CH

O

Channel select output terminal    Not used (open)

54

INPUT-

CHANGE

O

Input gain control signal output terminal    “L”: VIDEO, “H”: MD    Not used (open)

55

IIC-DATA

I/O

Communication data bus with the fluorescent indicator tube driver (IC601) and IIC interface
controller (IC901)

56

IIC-CLK

I/O

Communication data reading clock signal input or transfer clock signal output with the
fluorescent indicator tube driver (IC601) and IIC interface controller (IC901)

57

XRST

O

Reset signal output to the IIC interface controller (IC901)    “L”: reset

58

XLT

O

Serial data latch pulse output terminal    Not used (open)

59

FOCUS-SW

O

Focus control signal output terminal    Not used (open)

60

TBL-L

O

Motor drive signal output to the disc tray turn motor driver (IC201)

61

TBL-R

O

Motor drive signal output to the disc tray turn motor driver (IC201)

62

TRAY-LED

O

LED on/off control signal output for the CD tray LED    “H”: LED on

63

LOAD-OUT

O

Motor drive signal output terminal    Not used (open)

64

LOAD-IN

O

Motor drive signal output terminal    Not used (open)

65

ST-CLK

O

PLL serial data transfer clock signal output to the FM/AM tuner unit

66

ST-DIN

I

PLL serial data input from the FM/AM tuner unit

67

ST-DOUT

O

PLL serial data output to the FM/AM tuner unit

68

ST-CE

O

PLL chip enable signal output to the FM/AM tuner unit

69

TUNED

I

Tuning detection signal input from the FM/AM tuner unit    “L”: TUNED

70

STEREO

I

FM stereo detection signal input from the FM/AM tuner unit    “L”: STEREO

71

VSS

—

Ground terminal

72

ST-MUTE

O

Tuner mute control signal output to the FM/AM tuner unit    “L”: mute on

73

SENS2

I

Internal status (SENSE) signal input terminal    Not used (fixed at “L”)

74

SENS

I

Internal status (SENSE) signal input terminal    Not used (fixed at “L”)

75

DISC-SENS

I

Disc status detection signal input terminal    Not used (open)

76

T-SENS

I

Disc tray status detection signal input from the disc tray sensor (IC202)

77

UPSW

I

Detection input from the up switch (S201)

78

ENC3

I

79

ENC2

I

Tray address detect signal input terminal    Not used (open)

80

ENC1

I

81

OUT-OPEN

I

Disc tray open/close detect signal input terminal    “L”: open, “H”: close    Not used (open)

82

CAP-H/N

O

High/normal speed selection signal output of the capstan motor (M1)
“L”: high speed, “H”: normal speed

83

A-TRG

O

Motor drive signal output to the trigger motor driver (IC1502)

84

B-TRG

O

Motor drive signal output to the trigger motor driver (IC1502)

85

TRG-LOW

O

Motor control signal output to the trigger motor driver (IC1502)

86

CAP-M-ON/OFF

O

Capstan motor on/off control signal output terminal    “L”: capstan motor on