Electrical Adjustments - Sony HCD-NEZ30 Service Manual

HCD-NEZ30
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.
• Test Tape
Tape Signal
P-4-A063 6.3 kHz, -10 dB
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note: Remove the cassette lid assy before this adjustment.
TE
L 13942296513
Procedure:
1. Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
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SECTION 6

ELECTRICAL ADJUSTMENTS

Used for
Azimuth Adjustment
HEAD PHONE board
PHONES jack
(J500)
level meter
+
–
x ao
y
i
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8
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-A063
(6.3 kHz, –10 dB)
set
waveform of oscilloscope
Q Q
3 6 7 1 3
in phase 45°
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Record/Playback/Erase Head
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.
2 9 9 4 2 8
within
1dB
within
1dB
Screw
position
L-CH R-CH
peak peak
HEAD PHONE board
PHONES jack
oscilloscope
(J500)
V H
1 5 0 5 8 2 9 9 4
90° 135° 180°
good wrong
m
co
9 9
2 8 9 9