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26

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.

3. Mode:  Playback

4. After the adjustments, apply suitable locking compound to the

pats adjusted.

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the

[CD SYNC HI-DUB] 

button.

Procedure:
1. Press

?/1

button to turn the set ON.

2. Press three buttons

x

, 

[DISPLAY]

 and 

[CD SYNC HI-DUB]

simultaneously.
To release from the test mode, press the

?/1

button.

Mode:  Playback

1. Insert the WS-48B into the deck B.
2. Press the hH button on the deck B.
3. Press the 

[CD SYNC HI-DUB]

 button in playback mode.

Then at HIGH speed mode.

4. Adjust RV1001 on the SW board so that frequency counter reads

6,000 

± 180 Hz.

5. Press the 

[CD SYNC HI-DUB]

 button.

Then back to NORMAL speed mode.

6. Adjust RV1002 on the SW board so that frequency counter reads

3,000 

± 90 Hz.

Adjustment Location: SW board

Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)

(WS-48B)

Screw
position

L-CH
peak

within
1dB

Output
level

L-CH
peak

R-CH
peak

within
1dB

Screw
position

R-CH
peak

SP
REALY
baord
CN804
set

test tape
P-4-A100
(10 kHz, –10 dB)

pin 

5

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

pin 

3

pin 

2

L

R

+
–

set

test tape
WS-48B 
(3 kHz, 0 dB)

SP RELAY board
CN804 Pin 

3

 (GND)

SP RELAY board
CN804
Pin 

2

 (L-CH)

Pin 

5

 (R-CH)

frequency counter

forward

reverse

27

4. Mode:  Record

5. Mode:  Playback

6. Confirm the play back signal recorded in step 3 becomes

adjustable level as follows.
If these levels are not adjustable level, adjust the RV53 (R-CH)
on the SP RELAY board to repeat steps 4 and 5.

Adjustable level:
CN804 PB level:  47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location:  SP RELAY board

Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.

1. Press 

[MD $VIDEO%]

 button to select VIDEO. (This step is not

necessary if the above test mode has already been set)

2. Insert a tape into deck B.
3. After press 

[REC PAUSE/START]

 button, press 

[REC PAUSE/

START]

 button, then recording start.

4. Mode:  Record

5. Mode:  Playback

6. Confirm the playback signal recorded in step 3 becomes

adjustable level as follows.
If these levels are not adjustable level, adjust the RV2 (L-CH)
and RV52 (R-CH) on the SP RELAY board to repeat steps 4
and 5.

Adjustable level: Playback output of 315 Hz to playback output

of 10 kHz:  

±1.0 dB

Adjustment Location:  SP RELAY board

Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.

1. Press 

[MD $VIDEO%]

 button to select VIDEO. (This step is not

necessary if the above test mode has already been set)

2. Insert a tape into deck B.
3. After press 

[REC PAUSE/START]

 button, press 

[REC PAUSE/

START]

 button, then recording start.

attenuator

set

DSP board
MD (AUDIO) (J701)

1) 315 Hz
2) 10 kHz

50 mV (–23.8 dB)







600 

Ω

blank tape
CN-123

AF OSC

+
–

set

recorded
portion

SP RELAY board
CN804 Pin 

3

 (GND)

SP RELAY board
CN804
Pin 

2

 (L-CH)

Pin 

5

 (R-CH)

level meter

set

DSP board
MD (VIDEO) (J701) 
315 Hz, 50 mV (–23.8 dB)

blank tape
CS-123

600 

Ω

attenuator

AF OSC

+
–

set

recorded
portion

SP RELAY board
CN804 Pin 

3

 (GND)

SP RELAY board
CN804
Pin 

5

 (R-CH)

level meter

TAPE SPEED

ADJUSTMENT

RV1002

RV1001

(NORMAL)  (HIGH)

CN1001





















– SW BOARD (Component Side) –

CN804

10

1

– SP RELAY BOARD (Conductor Side) –

REC BIAS

ADJUSTMENT

REC LEVEL

ADJUSTMENT

(L-CH)

(R-CH)

RV52 RV2

RV53















28

1.

CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.

2.

Use LUV-P01 (4-999-032-01) unless otherwise indicated.

3.

Use an oscilloscope with more than 10M

Ω impedance.

4.

Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.

Procedure :
1. Connect an oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (DVC) ( 1.65 V) by lead

wire.

3. Turn the power ON.
4. Load a disc (LUV-P01) and actuate the focus search. (In

consequence of open and close the disc tray, actuate the focus
search)

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

symmetrical between A and B. And confirm peak to peak level
within 2 

± 0.5 Vp-p.

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

• Try to measure several times to make sure than 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 an oscilloscope CH1 to TP (RFDC) and CH2 to TP

(RFAC).

2. Turn the power ON.
3. Load a disc (LUV-P01) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF

signal level is correct or not.

BD board

Oscilloscope

TP(FEO)
TP(DVC)

symmetry

S-curve waveform

within 2 

±

0.5Vp-p

A

B

TP(RFDC)

TP(RFAC)

BD board

oscilloscope

TP(DVC)

Clear RF signal waveform means that the shape “ 

◊ ”  can be clearly

distinguished at the center of the waveform.

Procedure :
1. Connect an oscilloscope to TP (TEO) and TP (DVC).
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the hH button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope

waveform.

6. Adjust RV101 on the BD board so that the center of waveform

becomes the same voltage of DVC. (i.e.  A=0V)

Connecting and Adjustment Location: BD board

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 0.65 

±

0.15Vp-p (RFDC)

1.1 

±

0.4Vp-p (RFAC)

TP(TEO)
TP(DVC)

BD board

oscilloscope

level=1.0 

±

0.5Vp-p

symmetry

A (DC voltage)

center of
waveform

B

DVC

1 track jump waveform

29

29

– BD BOARD (Component Side) –

TP

(DVC)

TP

(FEO)

TP

(FEI)

TP

(RFDC)

TP

(RFAC)

TP

(TEO)

– BD BOARD (Conductor Side) –

RV101

E-F BALANCE

(1 TRACK JUMP)

ADJUSTMENT