Sony DNW-A100 Maintenance Manual page 485

If the waveform does not become flat, perform
the check and adjustment below.
1 Clean the drum lead with a bamboo stick.
(Refer to Section 5-2-4 of Maintenance
Manual Part 1.)
2 Press down the tape by bamboo stick very
lightly and check that the tape is running
without aparting from the drum lead.
3 If the waveform does not become flat even
though steps 1 and 2 mentioned above are
performed, adjust the height of TG-3 so that
the RF envelope waveform is nearly flat
within the range of the specification 12
shown in the Fig.3. At this time, do not
overpress the tape at TG-3.
n
When adjusting the height of TG-3 in step 3, be
sure to check the height of AT head (Refer to
Section 7-1-6). If the AT head height does not
satisfy the specification, repeat the video tracking
adjustment.
(8) Adjust the height of TG-4 so that the lower
flange of TG-4 in contact with the tape.
(9) Check the tape running at the drum exit side
in the following modes.
. PLAY mode
. F. FWD mode
. REW mode
. REV
x 1 mode
. VAR _1/30 mode
x
If the tape curl does not satisfy the specification
13 at TG-3, perform the following adjustments
while observing the waveform.
1 Change the zenith of the AT head within the
range of the specification shown in Fig. 1.
2 Perform the tracking adjustment again.
(Refer to steps (1) through (9) mentioned
above.)
3 (In case of the adjustment is performed the
AT head zenith)
Perform the checks and adjustments de-
scribed below.
. AT head height (Refer to Section 7-1-6.)
. AT head azimuth (Refer to Section 7-1-7.)
. AT head head-to-tape contact (Refer to
Section 7-1-8.)
. AT head position (Refer to Section 7-1-9.)
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
http://getMANUAL.com
<Fig. 3>
A = RF max x 0.8
Spec.12:
<Tape-running check>
Spec.13 : 5 Lead of drum exit side
6 TG-3 (Exit guide)
7 TG-4
8 TG-5 (Threading roller)
Tracking Adjustment at Drum Exit Side
17. Recheck the Video Tracking
Perform the steps 5 through 11 again.
18. Attach the CL Guide Rail
Attach the CL guide rail with two screws.
(Refer to step 15.)
7-1-3. Video Tracking Check and Adjustment
RF max
A
C
C x 100 > 70%
A
The tape runs without any curl at the lead.
The tape runs in contact with the upper flange.
The tape curl is less than 1/10 of the tape width.
The tape runs in contact with the lower flange.
The tape curl is less than 1/10 of the tape width.
The tape runs without any curl at the upper and
lower flanges.
7-25