Measurement And Adjustments; Cassette Deck Section - Panasonic SA-PM45E Service Manual

SA-PM45E / SA-PM45EG / SA-PM45EE

12 Measurement And Adjustments

12.1. Cassette Deck Section

12.1.1. Requirements
· Test tape (QZZCFM) (QZZCWAT)
· Normal blank cassette tape (QZZCRA)
· Digital frequency counter
· Oscilloscope
· Electrical voltmeter
· Headphone jack output jig (Fig. 8)
12.1.2. Setting of Unit
· VOLUME: MAX
12.1.3. Preparations
1. Apply under [9. Assembling and Disassembling].
2. Remove 4 screws from the mechanism unit to disassemble. under [9. Assembling and Disassembling].
3. Connect the headphone jack output jig (Fig. 8) to headphone jack.
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. 8
Fig. 9
48