Sony HCD-CP11 - 5 Electrical Confirmations; ADJUSTMENTS. -1-Sss-Ssssssseesssssseesscssssesscsssseesecsssseesesssssens

SECTION 5
ELECTRICAL CONFIRMATIONS AND ADJUSTMENTS
DECK SECTION
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
Tape
P-4-A100 | 10 kHz, -10 dB Azimuth Adjustment
WS-48B | 3kHz,0dB
P-4-L300 315 Hz, 0 dB
| Tape Speed Adjustment
Level Adjustment
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback
test tape MAIN board
P-4-A100 LINE OUT jack (PJ301)
(10 kHz, -10 dB) L-CH, R-CH
level meter
—_
ia Cy)
Oo+
—_
12
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.
within
n 10B
R-CH
peak 1
Screw —» Screw
position L-CH R-CH position
peak peak
3. Mode: Playback
MAIN board
test tape LINE OUT jack (PJ301)
P-4-A100 L-CH ;
oscilloscope
(10 kHz, -10 dB) 7
waveform of oscilloscope
in phase 45° 90° 135° 180°
good wrong
=
Repeat step 1 to 3 in playback (REV) mode.
After the adjustments, apply suitable locking compound to the
pats adjusted.
uM
Adjustment Location:
reverse