Electrical Adjustments - Sony HCD-GT22 Service Manual

HCD-GT22/GT44/GT55
QQ
3 7 63 1515 0
DECK SECTION 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.
TEST TAPE
Tape Signal
P-4-A063 6.3 kHz, -10 dB
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note: Perform this adjustment for both decks.
Procedure:
1. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
2. Turn the adjustment screw and check output peaks. If the peaks
TE
L 13942296513
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
within
L-CH
1dB
peak
Output
level
R-CH
peak
Screw
position
L-CH
peak
3. Mode: Playback
test tape
MIC board
P-4-A063
PHONES jack
(6.3 kHz, –10 dB)
(J803)
set
www
waveform of oscilloscope
–45 ° 0 ° +45 °
.
good
20
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SECTION 6

ELECTRICAL ADJUSTMENTS

Used for
Azimuth Adjustment
MIC board
PHONES jack
(J803)
level meter
+
–
within
1dB
Screw
position
R-CH
peak
oscilloscope
V H
x ao
y
+90 ° +135 ° +180 °
i
wrong
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8
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (DECK-A)
Q Q
3 6 7 1 3
u163
.
2 9 9 4 2 8
Record/Playback/Erase Head (DECK-B)
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9