Sony GY-8240UWD Maintenance Manual page 193

Confirmation
4. Turn the Power On
5. Set the unit into the line mode
6. Check the tape running condition at
the entrance and exit sides of the
drum in the modes below
(a) FWD mode
(1) Play back the YR2-1A (IDR: 0 to 200000)
with the REC head. (R FWD mode)
(2) Set the unit into the tracking adjustment
mode. (Refer to Section 1-11.)
(3) Check the both output levels at the drum
entrance and the drum exit do not become
higher than the output level at the midpoint of
the waveform when changing the tracking
setting value.
If the output level on the entrance or exit
sides becomes higher than the output level in
the center portion, perform the adjustment
(on the drum entrance or exit side) in steps 7
and later.
(4) Operate the tracking setting value in the +
direction to bring the center portion of the RF
envelope waveform to the 80 % of the
maximum output level, and check the RF
envelope waveform satisfies specification 1.
If the output level fluctuates, read the average
value. In this case, operate the tracking
setting value to maximize the output level at
the midpoint of the waveform, and check that
the fluctuation amount satisfies the specifica-
tion 2.
If specifications 1 and 2 are not satisfied,
perform the adjustment (on the drum entrance
or exit side) in steps 7 and later.
(5) Press the switch S110 (ESC) on the DSP-90
board twice to exit the tracking adjustment
mode.
GY-8240UWD
GY-8240FC
. Alignment tape: YR2-1A (IDR : 0 to 200000)
<Head-to-tape contact>
<Fluctuation>
- To be continued. -
A B
A = RF max x 0.8
Spec.1: B x 100 > 80%
A
C x 100 > 80%
A
Output levels (B and C) at the drum
entrance side and exit side are more
than 80 % of the center level (A).
a
b
D
D = average level in the center portion
a x 100 < 20%
Spec.2:
D
b x 100 < 20%
D
c x 100 < 20%
D
Fluctuation amounts (a, b, c) at the drum
center portion, entrance side and exit side
are less than 20 % of the average level (D).
4-4. Tracking Adjustment
RF max
C D
RF max
RF max
c
4-13