Panasonic PV-L452 Service Manual page 65

5. Confirm and readjust the A/C Head height.
6. Confirm and readjust Screw C (Azimuth) on the A/C Head so that
the output audio becomes is maximum.
6.2.2.1.4. A/C HEAD HORIZONTAL POSITION ADJUSTMENT
Purpose:
To adjust the Horizontal Position of the A/C Head.
Symptom of Misadjustment:
If the Horizontal Position of the A/C Head is not properly adjusted,
maximum envelope can not be obtained at the Neutral Position of
the Tracking Control Circuit.
1. Put the unit into the service mode "I. TRACKING FIX" to defeat
Auto Tracking. Refer to "SERVICE MODE SPECIFICATION (SELF-
DIAGNOSTIC SYSTEM)" in "SERVICE NOTES."
2. Connect the oscilloscope to Pin 32 (Envelope signal) on the TP
Adjustment P.C.B. Use Pin 33 (Head Switch signal) as a trigger.
3. Play back the VHS-C Alignment Tape (VFMS0004H6C).
4. Set the Screwdriver into the Hole (A) as shown.
5. Slowly move the A/C Head Unit to the direction "A" or "B" as
shown so that the envelope is at maximum.
Fig. M6-1
Fig. M6-2
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