Panasonic SA-AK58 Service Manual page 59

channels does not exceed 0.5dB.
3. Perform the same adjustment in reverse playback mode. /
Checking of the level difference forward and reverse directions
4. 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.
5. After the adjustment, apply screwlock to the azimuth adjusting
screw.
Fig.5
Fig.6
Fig.7
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