Sony BVW-55 Maintenance Manual page 380

5-10. AT Head Azimuth Check and Adjustment
Check procedure
5. Turn the power on
6. Play back the alignment tape
Play back the 10 kHz, -10 VU signal portion
(3:00 to 4:55) on the CR8-1A.
7. Check the AT head azimuth
(1) Adjust the horizontal and vertical amplitudes
of lissajous waveform to 6 cm each.
(2) Check that the lissajous waveform holds the
upper-right shape.
(3) Check that the vertical amplitude at the center
point in the horizontal direction satisfies the
specification.
(4) Repeat changing the mode STOP to PLAY
three times, check that the waveform satisfies
the specification on every PLAY mode.
(5) Repeat changing the mode REW to PLAY
three times, check that the waveform satisfies
the specification on every PLAY mode.
(6) Repeat changing the mode EJECT to PLAY
three times, check that the waveform satisfies
the specification on every PLAY mode.
If the specification is not satisfied in any
steps (3), (4), (5) or (6), perform steps 8 and
later.
5-38
. Alignment tape : CR8-1A (3:00 to 4:55)
<Lissajous waveform>
Upper-right(OK)
6 cm
Spec. : A < 0.52 cm
Upper-left(NG)
6 cm
A
Phase difference 0
BVW-55 P2