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13

J301

CN501

CN301

1  2  3

CN503

SL503

SL502

SL501

CHECK LED

CN502

14

0 dB=0.775 V

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 adjust.

4. The adjustments should be performed with the rated power

supply 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
adjustment.)

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.

• Test Tape

P-4-A100

10 kHz, –10 dB

Azimuth Adjustment

WS-48B

3 kHz, 0 dB

Tape Speed Adjustment

P-4-L300

315 Hz, 0 dB

Level Adjustment

  Perform this adjustments for both decks

Procedure:
1. Mode:  Playback

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

demagnetizer.

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

supply voltage unless otherwise noted.

set

main board
CN301
Pin 

3

 (L-CH)

Pin 

1

 (R-CH)

main board
CN301
Pin 

2

 (GND)

+
–

level meter

test tape
P-4-A100
(10 kHz, –10 dB)

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

100 g or more

(3.53 oz or more)

9.80 N • m

100 g or more

(3.53 oz or more)

CQ-102C

CQ-102C

CQ-102RC

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

15

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. Turn the power switch on.
2. Press the x button,  ENTER  button and  DISC 3  button

simultaneously.
(The “TEST MODE” on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the ?/1 button.

Mode:  Playback

1. Insert the WS-48B into the deck B.
2. Press the gG 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 LEAF SW board do that frequency

counter reads 6,000 ± 30 Hz.

5. Press the  CD SYNC HI-DUB  button.

Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency

counter reads 3,000 ± 15 Hz.

Adjustment Location:  LEAF SW board

Procedure:
Mode:  Playback

Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.
Adjustment Level:

CN301 PB level:  334.4 to 748.7 mV (–7.3 to  –0.3 dB) level
difference between the channels:  within ±0.5 dB

Adjustment Location:  MAIN board

Sample Volue of Wow and Flutter: 0.3% or less W. RMS

(WS-48B)

1

°

°

°

°

2

3

3

1

3

forward

reverse

16

4. Mode:  Record

5. Mode:  Playback

6. Confirm playback the signal recorded in step 3 become

adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
4 and 5.

Adjustable level:
CN301 PB level:  47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location:  MAIN board

[MAIN  BOARD] (Component Side)

[LEAF  SW  BOARD]  (Component Side)

Procedure:
INTRODUCTION
When set to the test mode performed in 

Tape Speed Adjustment

,

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
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotette
of shuttle knob then rewind to 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 playback the signal recorded in step 3 become

adjustable level as follows.
If these levels do not adjustable level, adjustment the RV304
(L-CH) and RV354 (R-CH) on the AUDIO 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:  MAIN board

Procedure:
INTRODUCTION
When set to the test mode performed in 

Tape Speed Adjustment

,

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
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotate
of shuttle knob then rewind to 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.







Ω

3

1

Ω

3

1





















RV354

CN303

CN301

CN304

RV304

RV301

RV352
RV302

RV353

RV303

RV351

RV11

T11

REC LEVEL (L)

(B)

PB LEVEL (L)

(A)

REC LEVEL (L)

(A)

REC LEVEL (R)

(A)

PB LEVEL (L)

(B)

REC LEVEL (R)

(B)

1

3