Sony SA-VA100 Service Manual page 31

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3 7 63 1515 0
3. Mode: Playback
test tape
P-4-A100
(10kHz, –10dB)
in phase
4. Change the reverse playback mode and repeat the steps 1 to 3.
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location: Record/Playback/Erase Head
TE
L 13942296513
Forward side
Note: When adjusting the azimuth, remove the Lid (TC) from the control
panel assembly in advance.
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VIDEO 1 OUT L
oscilloscope
L
V
set
R
VIDEO 1 OUT R
Waveform of oscilloscope
45˚ 90˚ 135˚ 180˚
good wrong
Reverse side
Adjustment screw
x ao
y
i
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8
Tape Speed Adjustment
Procedure :
Mode: Playback
test tape WS-48B
(3kHz, 0dB)
H
1. Set to the playback mode.
2. Adjust the RV71 on the AUDIO board so that the frequency
counter reading becomes 3,000 ± 10 Hz.
Adjustment Location: AUDIO board
Playback Level Adjustment
Procedure:
Mode: Playback
test tape P-4-L300
(315Hz, 0dB)
Q Q
3 6 7 1 3
Adjust the RV11 (L-CH) and RV21 (R-CH) to satisfy the following
adjustment level.
Adjustment level:
VIDEO 1 OUT level: 294.6 to 330.6 mV (–8.4 to –7.4 dB)
level difference between the channels: within ± 0.5 dB
Confirm that the VIDEO 1 OUT Level does not change when
playback and stop are repeated.
Adjustment Location: AUDIO board
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2 9 9 4 2 8
frequency counter
set
VIDEO 1 OUT
set
1 5 0 5 8 2 9 9 4
VIDEO 1 OUT
m
co
9 9
level meter
2 8 9 9