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– 21 –

+
–

set

recorded
portion

MAIN board
CN207 (pin 

3

: L-CH)

(pin 

1

: R-CH)

level meter

attenuator

set

pin 

6

 (L-CH) of IC1501 on the MAIN board.

pin 

#¶

 (R-CH) of IC1501 on the MAIN board.

1) 315 Hz
2) 10 kHz

50 mV (–23.8 dB)







pin 

2

 (GND) of CN207 on the MAIN board.

600 

Ω

blank tape
CS-123

AF OSC

set

pin 

6

  (L-CH) of IC1501 on the MAIN board.

pin 

#¶

  (R-CH) of IC1501 on the MAIN board.

315 Hz, 50 mV (–23.8 dB)

blank tape
CS-123

pin 

2

  (GND) of CN207 on the MAIN board.

600 

Ω

attenuator

AF OSC

RV1501

IC1501

CN205

CN207

RV1551

RECORD LEVEL

IC301

IC201

1

21

1

22

42

3

Procedure:
1. Mode:  Record

2. Mode:  Playback

+
–

set

recorded
portion

MAIN board
CN207 (pin 

3

: L-CH)

(pin 

1

: R-CH)

level meter

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 1
and 2.
Adjustable limits: Playback output of 315 Hz to playback out-

put of 10 kHz:  ±0.5 dB

Adjustment Location:  AUDIO board

Procedure:
1. Mode:  Record

2. Mode:  Playback

Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
CH) and RV1551 (R-CH) on the MAIN board to repeat steps 1
and 2.
Adjustable limits:

CN207 PB level:  47.3 to 53.1 mV (–24.3 to –23.3 dB)

Adjustment Location:  MAIN board

[MAIN  BOARD] (Component Side)

[AUDIO  BOARD]  (Conductor Side)

RECORD

BAIS

TAPE SPEED

(NORMAL)

RV651

®

(HIGH)

RV652

®

RV311

L 

®

RV411

R 

®

PB

LEVEL

RV441 RV341

RV301

®

L

RV401

®

R

R

L

– DECK B –

– DECK A –











PB LEVEL

    

































– 22 –

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

Therefore, 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 fol-
lowing 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.  (actuate the focus search when disc
table is moving in and out.)

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.

S-curve waveform

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.

RF signal waveform

VOLT/DIV: 200 mV
TIME/DIV: 500 ns
(with the 10: 1 probe
in use)

level: 1.3

Vp-p

+0.25
–0.20

A

B

symmetry

within 3.0 ± 1.0 Vp-p

+
–

BD board

TP (RF)

TP (VC)

oscilloscope

(AC range)

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

When a general remote commander (RM-SV808) is used
(Traverse Check):
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 on the remote commander. (The

tracking servo and the sledding 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 %

Traverse waveform

+
–

BD board

TP (FE)

TP (VC)

oscilloscope

+
–

BD board

TP (TE)

TP (VC)

oscilloscope

(DC range)

0 V

Center of the waveform

B

A (DC voltage)

level: 1.3 ± 0.6 Vp-p

7. Press the  REPEAT  button on the remote commander. (The

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

Traverse waveform

0 V

Tracking servo

Sled servo

OFF

Tracking servo
Sled servo
           ON

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

C (DC
voltage)

– 23 –

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.

[BD  BOARD] (SIDE-A)

When a general remote commander is not used (1 Track Jump
Check):
Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on BD board.
2. Turned power switch on.
3. Put disc (YEDS-18) in and press the 

·∏  button, and play

the number five track.

4. Press the 

·∏  button.  (Becomes the 1 track jump mode)

5. 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

2 (A + B)  

×

 100 = ±7 (%)

1 track jump waveform

Center of the waveform

B

level : 1.3 

±

 0.6 Vp-p

symmetry

A (DC voltage)

0V

+
–

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.

[VIDEO  BOARD] (SIDE-B)

+
–

TP410 (DCLK)

VIDEO board

frequency counter

TP410
(DCLK)

IC402

CT401

IC101

(FEL)

(FE)

(FE)

(VC)

(PLCK)

(RF)

IC103

– 24 –

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    Fixed at “L”

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

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”)

44

COM-DOUT

O

Serial data output to the electrical volume (IC201), DJ effect controller (IC401), and key
control (IC1401)