Panasonic PV-DF2700-K Service Manual page 108

Note:
A. Do not rub vertically or apply excess pressure to the Video Heads.
Do not turn the Upper Cylinder Unit clockwise while cleaning.
B. After cleaning, use a Dry Head Cleaning Stick (VFK27) to remove any Ethanol
remaining on the cylinder tape path. Otherwise, tape damage will occur.
7.2.2. ADJUSTMENT PROCEDURES
7.2.2.1. BACK TENSION CONFIRMATION
Purpose:
To fine adjust the Back Tension so that the tape runs smoothly with a constant
tension.
Symptom of Misadjustment:
1) If the tape tension is less than the specified value, the tape cannot come into
proper contact with the Video Heads, resulting in poor picture playback.
2) If the tape tension is too high, the tape will soon be damaged.
Equipment Required:
Back Tension Meter (Made in U.S.A., Purchase Locally)
VHS Cassette Tape (120-Minute Tape)
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