Sony DSR-300 Service Manual page 246

5. When performing the adjustments in steps 2 to 4,
check that the RF waveform does not change. If
the entrance of the tracking waveform is facing
down, rotate the TG-2 upper flange in the
counterclockwise direction and increase the
height of the lower flange so that the RF
waveform at the entrance is flat.
6. Set the REV search mode, and check that there
are no curls formed at the lower flange of the
TG-2 guide. If curled, perform steps (1) and (2).
(1) Rotate the upper flange of the TG-2 guide in
the clockwise direction to remove the curls.
(2) Rotate the upper flange of the TG-3 guide in
the counterclockwise direction by 180d, and
check that the tape rises. Then return the nut
to its original position.
5-10
<RF waveform>
Entrance
TG-1 upper flange
TG-3 upper flange
TG-3
TG-2
TG-2 upper flange
TG-1
DSR-300/P(E)/V1