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Panasonic PV-4601 A Service Manual page 67

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H-Position Adjustment Screwdriver .....(VFKS0082)
1. CONFIRMATION OF TAPE TRAVEL
Purpose :
To be sure that the tape runs smoothly.
Symptom of Misadjustment :
If the tape travels with instability, the tape will be damaged.
1. Play back a T120 cassette tape and confirm that the tape travels without curling at
the upper and lower guides on posts P2 and P3.
2. If curling is apparent, adjust the height of the posts by turning the top of the post
with the Post Adjustment Screwdriver (for P2 & P3).
2. CONFIRMATION OF A/C HEAD HEIGHT
The height of the A/C Head replacement part assembly has already been adjusted at
the factory.
Purpose :
To be sure the tape runs properly along the Control Head.
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 A/C Head is replaced and for a preliminary
height adjustment. For final adjustments, perform "CONFIRMATION OF TILT OF A/C
HEAD and AZIMUTH ADJUSTMENT OF A/C HEAD".
1. Looking at the lower edge of the Control Head with the T120 tape in motion, ensure
Fig. M12
67

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