- Head azimuth adjustment (8 kHz, -20 dB); QZZCFM - Tape speed gain adjustment (3 kHz, -10 dB); QZZCWAT - Playback gain adjustment (315 Hz, 0 dB); QZZCFM - CrO2 tape, QZZCRX
12.1.1. Head Azimuth Adjustment
Note : If you wish to readjust the head azimuth, be sure to adjust with adhering the casette tape closely to the mechanism by pushing the cebter of cassette tape with your finger. (Shown in Fig. 1)
1. Connect the measuring instrument as shown in Fig. 2. 2. Replace azimuth screws for both forward and reverse direction after removing the screw-locking bond left on the head base. 3. Playback the azimuth adjustment portion(8kHz, -20dB) of test tape(QZZCFM). Adjust the azimuth adjusting screw until the outputs of the L/Rch are maximized. (Refer to Fig. 3) Make sure that the difference in the peak level between the left and right channels does not exceed 5dB. 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(315Hz, 0dB) of test tape(QZZCFM). Check if level difference between forward and reverse direction is within 1.5dB. 6. After the adjustment, apply screwlock to the azimuth adjusting screw.
Fig. 1
