Electrical Adjustments - Sony DXA-WZ8D Service Manual

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3 7 63 1515 0
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.
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-A63J 10 kHz, –10 dB
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: Playback
test tape
P-4-A63J
(10 kHz, –10 dB)
TE
L 13942296513
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
R-CH
peak
Screw
position
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ELECTRICAL ADJUSTMENTS

0 dB=0.775 V
Signal Used for
Azimuth Adjustment
SPEAKER terminals (TM402)
L-CH, R-CH
level meter
set
+
–
within
1 dB
Output
level
L-CH R-CH
peak peak
x ao
y
i
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SECTION 3
8
3. Mode: Playback
test tape
P-4-A63J
(10 kHz, –10 dB)
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Q Q
3 6 7 1 3
within
1 dB
Screw
position
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.
2 9 9 4 2 8
SPEAKER terminals (TM401)
L-CH
oscilloscope
L-CH
V
set
R-CH
R-CH
waveform of oscilloscope
in phase 45 ° 90 ° 135 ° 180 °
good wrong
1 5 0 5 8 2 9 9 4
m
co
DXA-WZ8D
9 9
H
2 8 9 9
9