Panasonic SA-PM53E Service Manual page 117

12.1.4. Tape Speed Adjustment
- Normal speed adjustment (only during forward playback)
(Product reference value: 3,000±90Hz)
1. Connect a frequency indicator. (Fig. 12)
2. Playback the middle portion of the test tape (QZZCWAT).
3. Adjust the motor screw so that the following output level is produced.
(Fig. 10)
Adjustment Range: 3,000 ± 90Hz (a constant speed)
Fig. 10
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