Panasonic PalmSight PV-L750, Руководство по обслуживанию

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A. Exit the "I. Tracking Fix" mode, then skip the "J. PG Shifter"
mode to enter other modes (except these 2). Or, close the
service mode.
B. Press the Tracking Control Up Button on the camcorder several
times (count the number of times pressed) until the maximum
envelope is reduced to 1/2.
C. Press the Tracking Control Down Button on the camcorder
several times (count the number of times pressed) until the
maximum envelope is reduced to 1/2.
D. If the number of pressing is not the same, readjust
A/C Head horizontal position.
7.2.2.6. CONFIRMATION OF ENVELOPE OUTPUT
Purpose:
To achieve a satisfactory picture and secure precise tracking.
Symptom of Misadjustment:
If the envelope is output poorly, much noise will appear in the
picture. Then the tracking will lose precision and the playback
picture will be distorted by any slight variation of the tracking
control circuit.
1. Connect the oscilloscope to Pin 30 (Envelope signal) on the TP
Adjustment P.C.B. Use Pin 33 (Head Switch signal) as a trigger.
2. Play back the Alignment Tape (VFMS0004H6C).
3. Confirm that the envelope waveform is as flat as possible (V1/
V(max)> 0.7).
If adjustment is required, adjust S Post and/or T Post with "—"
Screwdriver. Refer to "
ENVELOPE OUTPUT ADJUSTMENT ."
Fig. M7
7.3. ELECTRICAL ADJUSTMENT
7.3.1. INTRODUCTION
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