Sony GY-8240UWD Maintenance Manual page 196

4-4. Tracking Adjustment
If the waveform does not become flat, perform
the check and adjustment below.
1 Clean the drum lead with a bamboo skewer.
(Refer to Section 2-2-3.)
2 Press down the tape by bamboo skewer very
lightly and check that the tape is running
without aparting from the drum lead.
3 Adjust the height of TG-2 so that the RF
waveform is nearly flat within the range of
the specification shown in the Fig 3. At this
time, do not overpress the tape at TG-2.
(7) Check the tape running at the drum entrance
side in the following modes.
. FWD mode
. VAR _1 time normal speed mode
. VAR _5 times normal speed mode
. F FWD mode
. REW mode
If the tape curl does not satisfy the specification
at either TG-0, TG-1 or TG-2, perform the
following adjustments while observing the
waveform.
1 Change the pressure against the tape at TG-1
and TG-2 within the range shown in the Fig. 1.
. If the tape curl at TG-1 exceeds the specifi-
cation, turn the upper flange of TG-2
clockwise.
. If the tape curl at TG-2 exceeds the specifi-
cation, turn the height adjustment nut of
TG-1 clockwise.
2 Perform the tracking adjustment again. (Refer
to step (1) through (7) mentioned above.)
(8) Press the switch S110 (ESC) on the DSP-90
board twice to exit the tracking adjustment
mode.
8. Recheck the Tracking
Refer to steps 5 through 6.
4-16
<Fig.3>
A B
A = RF max x 0.8
A = RF max x 0.8
<Tape running check>
1
Spec.1: TG-0
The tape runs without any curl at the lower flange.
2
TG-1 (S tension regulator)
The tape runs in contact with the upper flange.
The tape curl is less than 1/10 of the tape width.
3
TG-2 (Entrance guide)
The tape runs in contact with the upper flange.
The tape curl is less than 1/10 of the tape width.
4
Lead of drum entrance side
The tape runs without any curl at the lead.
Tracking Adjustment at Drum Entrance Side
RF max
B x 100 > 80 %
A
C D
C x 100 > 80 %
A
RF max
GY-8240UWD
GY-8240FC