Sony SS-CCP1 Manuel d'entretien - Page 13

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ELECTRICAL CONFIRMATIONS AND ADJUSTMENTS

DECK SECTION

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 demagne-
tizer.
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 ad-
justment 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 other-
wise specified.
• Test Tape
Tape
Signal
P-4-A100
10 kHz, –10 dB
WS-48B
3 kHz, 0 dB
P-4-L300
315 Hz, 0 dB
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
set
SECTION 5
Used for
Azimuth Adjustment
Tape Speed Adjustment
Level Adjustment
MAIN board
LINE OUT jack (PJ301)
L-CH, R-CH
level meter
+
–
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.
L-CH
peak
Output
level
R-CH
peak
Screw
position
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
MAIN
board
CN301
set
R-CH
waveform of oscilloscope
in phase 45 °
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location:
reverse
forward
– 12 –
within
1dB
L-CH
R-CH
peak
peak
MAIN board
LINE OUT jack (PJ301)
L-CH
oscilloscope
V
H
R-CH
90 ° 135 ° 180 °
good
wrong
within
1dB
Screw
position