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Tape Speed Adjustment
Procedure :
Mode: Playback
frequency counter
test tape WS-48B
(3kHz, 0dB)
set
VIDEO 1 OUT
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
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
set
test tape P-4-L300
(315Hz, 0dB)
VIDEO 1 OUT
3. Mode: Playback
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
Waveform of oscilloscope
4 5 ˚
9 0 ˚
135˚
180˚
wrong
good
in phase
L
oscilloscope
test tape
P-4-A100
(10kHz, –10dB)
R
VIDEO 1 OUT L
H
V
Forward side
Reverse side
Adjustment screw
Note:
When adjusting the azimuth, remove the Lid (TC) from the control
panel assembly in advance.
set
VIDEO 1 OUT R
level meter
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