HCD-CP300 - Sony Audio Service Manual (repair manual). Page 15

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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.

0 dB=0.775 V

Note: Confirm each contents of this section first of all. If the results are

not satisfied, do the adjustment.

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

Record/Playback Head Azimuth Adjustment
Procedure:
1.

Mode:  Playback

Tape

Signal

Used for

P-4-A63J

10 kHz, –10 dB

Azimuth Adjustment

WS-48A

3 kHz, 0 dB

Tape Speed Adjustment

P-4-L300

315 Hz, 0 dB

Level Adjustment

set

MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH

+
–

level meter

test tape
P-4-A63J
(10 kHz, –10 dB)

Screw
position

L-CH
peak

within
1 dB

Output
level

L-CH
peak

R-CH
peak

within
1 dB

Screw
position

R-CH
peak

3.

Mode: Playback

4.

Repeat step 1 to 3 in playback (REV) mode.

5.

After the adjustments, apply suitable locking compound to the
pats adjusted.

set

test tape
P-4-A63J
(10 kHz, –10 dB)

R-CH

oscilloscope

L-CH

R-CH

V

H

waveform of oscilloscope

in phase 45

°

90

°

135

°

180

°

good

wrong

MAIN board
SPEAKER terminals (SJ301)
L-CH

Connect jig (extension cable J-2501-011-B)
to the MAIN board (CN304) and CD board (CN101). 

MAIN board

CD board