Panasonic OmniVision PV-Q1311, Руководство по обслуживанию

Страница: 57 / 247

Symptom of Misadjustment:
If the control signal is not properly picked up, Servo Operation
cannot be achieved. A Blue screen will be seen in Playback.
This confirmation is required when the Audio Control Head is replaced.
1. Play back a T120 cassette tape and check that the lower edge of
the tape runs approximately 0.25 mm above the lower edge of the
Audio Control Head.
2. If necessary, adjust Black Screws (A) and (B) clockwise to lower
the tape or counterclockwise to raise.
Fig. M6
7.2.2.3.4. AUDIO CONTROL HEAD AZIMUTH ADJUSTMENT
Purpose:
To adjust the position and height of the Audio Control Head so
that it meets the tape tracks properly.
Symptom of Misadjustment:
If the position of the Audio Control Head is not properly adjusted,
the Audio S/N Ratio is poor.
1. Connect the oscilloscope to the TP4002 on the TV/VCR Main C.B.A.
2. Play back the 6 kHz Monaural Audio portion of the alignment tape.
3. Adjust Black Screw (C) on the Audio Control Head base so that the
output level is at maximum.
Fig. M7
57