Measurement And Adjustments; Cassette Deck Section - Panasonic SA-PM91DEE Service Manual

SA-PM91DEE

17 Measurement And Adjustments

17.1. Cassette Deck Section

17.1.1. Requirements
· Test tape (QZZCFM) (QZZCWAT)
· Normal blank cassette tape (QZZCRA)
· Digital frequency counter
· Oscilloscope
· Electrical voltmeter
· Headphone jack output jig (Fig. 8)
17.1.2. Setting of Unit
· VOLUME: MAX
17.1.3. Preparations
1. Apply under [12. Assembling and Disassembling].
2. Remove 4 screws from the mechanism unit to disassemble. under [12. Assembling and Disassembling].
3. Connect the headphone jack output jig (Fig. 8) to headphone jack.
17.1.4. 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. 8
Fig. 9
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