HCD-G1300, LBT-G1300 - Sony Audio Service Manual (repair manual). Page 9

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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.

1. Demagnetize the record/playback head with a head damagnetizer.
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
adjustment.)

6. The adjustments should be performed for both L-CH and R-

CH.

Used for

10 kHz, –10 dB

3 kHz, 0 dB

Azimuth Adjustment

Tape Speed Adjustment

Tape

P-4-A100

WS-48B

Signal

Note: Perform this adjustments for both decks.

Procedure:
1. Mode : Playback

test tape
P-4-A100
(10kHz, –10dB)

set

SPEAKER
terminal (JK501)

level meter

+

–

FWD

FWD
back tension

1 to 5 g • cm

(0.01 - 0.07 oz • inch)

FF/REW

40 to 70 g • cm

(0.56 - 0.97 oz • inch)

Torque

Torque meter

Meter reading

CQ-102C

CQ-102C

CQ-201B

55 to 140 g • cm

(0.76 - 1.94 oz • inch)