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5-18
GY-2120WD/WS
If the waveform is not flat, perform the check and
adjustment below.
1
Clean the drum lead with a bamboo stick.
(Refer to Section 2-1-4.)
2
Press down the tape by bamboo stick 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
envelope 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
.
S-1 mode
.
S-5 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 [8] key of the PC to exit the track-
ing adjustment mode.
8. Recheck the Tracking
Refer to steps 5 through 6.
5-4. Tracking Adjustment
Tracking Adjustment at Drum Entrance Side
A B
RF max
A
C
B
x
100
>
80%
C
x
100
>
80%
A
A
A=RF max
x
0.8
<Fig.3>
<Tape running check>
1
2
3
4
Spec.1:
TG-0
The tape runs without any curl at the lower flange.
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.
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.
Lead of drum entrance side
The tape runs without any curl at the lead.
Summary of Contents for GY-2120WD
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Page 437: ...7 3 GY 2120WD WS Index Mechanical Deck Overall Block 6 7 9 8 2 1 3 4 5 ...
Page 469: ...8 1 GY 2120WD WS 8 1 Section 8 Block Diagrams Frame Wiring ...
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