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17

3.04 – 6.96 N • m

(31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 N • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

3.04 – 6.96 N • m

(31 to 71 g • cm)

(0.43 – 0.98 oz • inch)

0.20 – 0.58 N • m

(2 to 6 g • cm)

(0.02 – 0.08 oz • inch)

6.97 – 14.02 N • m

(71 to 143 g • cm)

(0.98 – 1.99 oz • inch)

0.98 N • m or more

(100 g or more)

(3.53 oz or more)

0.98 N • m or more

(100 g or more)

(3.53 oz or more)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

1. Clean the following parts with a denatured alcohol-moistened

swab:

record/playback heads

pinch rollers

erase head

rubber belts

capstan

idlers

2. Demagnetize the record/playback head with a head demagne-

tizer.

3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the

parts adjusted.

5. The adjustments should be performed with the rated power sup-

ply voltage unless otherwise noted.

Procedure:
1. Mode : Playback

Mode

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

Meter reading

1. Demagnetize the record/playback head with a head demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the

parts adjusted.

4. The adjustments should be performed with the rated power sup-

ply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this

service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit adjust-
ment.)

6. The adjustments should be performed for both L-CH and R-CH.
7. Switches and controls should be set as follows unless otherwise

specified.

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 1 dB of peak.

1

3

Signal

Used for

Tape

P-4-A100

WS-48B

10 kHz, –10 dB

3 kHz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

18

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

parts adjusted.

Adjustment Location: Record/Playback/Erase Head

Note: Set the test mode using the following method and begin tape

speed adjustment.

Procedure:
With the power turned ON, press the  x  button,  ENTER/YES
button, and  DISC 3  button simultaneously.
(The “VOLUME” on the fluorescent display tube will blink while
in the test mode.)
To exit the test mode, press the  "/1  button.

1. Insert the WS-48B into deck.
2. Press the  Y  button of deck.
3. Check the reading of frequency counter becomes 3000 

± 15 Hz.

W.RMS (JIS) less than 0.3%
(test tape: WS-48B)

3. Mode: Playback

°

°

°

°

2

1

3

INTRODUCTION
When set to the test mode performed in 

,

when the tape is rewound after recording, the “REC memory

mode” which rewinds only the recorded portion and playback is
set.
This “REC memory mode” is convenient for performing this ad-
justment. During recording, the input signal FUNCTION will auto-
matically switch to VIDEO.
(After recording, press the  m  button without stopping will re-
turn to the position where recording was started.)

1. Press  FUNCTION  button to select VIDEO. (This step is not

necessary if the above test mode has already been set.)

2. Insert a tape into deck, press the  TAPE REC PAUSE/START

button, and then press the  Y button to start recording.

3. Mode: Record

5. Confirm playback the signal recorded in step 2 become adjust-

ment level as follows.
If these levels do not adjustment level, adjust the RV304 (L-CH)
and RV354 (R-CH) on the TC board to repeat steps 3 and 4.

Adjustment level: The playback output of 10 kHz level difference

against 315 Hz reference should be 0 

± 0.5 dB.

4. Mode: Playback

3

1

Ω

RV354

RV304

RV304(Lch),RV354(Rch)
Record Bias

19

INTRODUCTION
When set to the test mode performed in 

, when the tape is rewound after recording, the “REC memory

mode” which rewinds only the recorded portion and playback is
set.
This  “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will au-
tomatically switch to VIDEO.
(After recording, press the  m  button without stopping will re-
turn to the position where recording was started.)

1. Press  FUNCTION  button to select VIDEO. (This step is not

necessary if the above test mode has already been set.)

2. Insert a tape into deck, press the  TAPE REC PAUSE/START

button, and then press the  Y  button to start recording.

3. Mode: Record

4. Mode: Playback

5. Confirm playback the signal recorded in step 2 become adjust-

ment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-CH)
and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:
CN301 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Ω

3

1

CN301

IC301

Record Level (L ch)

RV351

Record Level (R ch)

RV301

Note :

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 fol-
lowing 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 Power switch on.
4. Load a disc (LUV-P01) and actuate the focus search. (In conse-

quence of open and close the disc tray, 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 2 

±

0.5 Vp-p.

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

Note :

• 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 Power switch 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.

±

20

Note :

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 Power switch on.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the  gG  button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscillo-

scope waveform.

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

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

[BD (CD) BOARD] (Conductor Side)

±

±

±