Sony DNW-A100 Maintenance Manual page 495

Check
4. Turn the Power On
5. Play Back the Alignment Tape
Play back the 10 kHz, _10 VU signal portion
(3:00 to 4:55) on the CR8-1A/PS.
6. 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) Strike the portions A and B shown in the
figure lightly with the tip of a screwdriver.
Then check that the specification is satisfied.
(5) If the specification in any of steps (1), (2) or
(3) is not satisfied, perform steps 7 and later.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
http://getMANUAL.com
. Alignment tape : CR8-1A/CR8-1A PS (3:00 to 4:55)
Height
adjustment
screw
Azimuth adjustment screw
<Lissajous waveform>
Upper-right(OK)
6 cm
7-1-7. AT Head Azimuth Check and Adjustment
AT head
Portion B
Portion A
Upper-left(NG)
6 cm
Phase difference 0
Spec. : A < 0.52 cm
AT Head Azimuth Check
A
7-35