Panasonic RS-DV290EG, Руководство по обслуживанию

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- AF Oscillator
- Test tape
- Head azimuth adjustment (8 kHz, -20 dB): QZZCFM
- Tape speed adjustment (3 kHz, -10 dB): QZZCWAT
- Playback gain adjustment (315 Hz, 0 dB): QZZCFM
- Recording/playback frequency response check:
QZZCFM / (315 Hz, -20 dB, 12.5 kHz~63 Hz, -20 dB)
QZZCRA4 (Normal blank tape)
QZZCRX2 (CrO2 blank tape)
QZZCRZ6 (Metal blank tape)
13.3. Head azimuth adjustment (Deck 1/2)
1. Connect the measuring instrument as shown in Fig. 13-1.
2. Replace azimuth screws for both forward and reverse directions
after removing the screw-locking bond left on the head base.
(Supply part No. of azimuth screw: RHD17015 )
3. Playback the azimuth adjustment portion (8 kHz, -20 dB) of test
tape (QZZCFM). Adjust the azimuth screw until the outputs of the L/
R ch are maximized. Refer to
Fig. 13-2. Make sure that
thedifference in the peak level between the left and right channels
does not exceed 0.5 dB.
4. Perform the same adjustment in reverse playback mode.
Check of the level difference forward and reverse directions.
5. Playback the playback gain adjustment portion (315 Hz, 0 dB) of
test tape (QZZCFM). Check if level difference between forward and
reverse direction is within 1.5 dB.
6. After the adjustment, apply screw lock to the azimuth screw.
Fig. 13-1.
Fig. 13-2.
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