Sony GY-8240UWD Maintenance Manual page 194

4-4. Tracking Adjustment
(b) VAR _ _ _ _ _ 1 Time Speed Mode to FWD
(PLAY) Mode
(1) Play back the YR2-1A (IDR: 0 to 200000)
with the REC head.
(2) Set the unit into the VAR _5 times speed
mode, and after 5 to 7 seconds, press the
switch S110 (ESC) on the DSP-90 board.
(A press of S110 switch will change the tape
running from VAR _5 times normal speed to
the REC head playback mode.)
At this time, check the following items (1 and
2).
1 Check that the RF envelope waveform turns
to the maximum level with the even level
within 1 second. (Spec.5-1)
In case of the waveform becomes A, B or C,
check that the output level (b) is more than 70
% of the level in normal FWD mode (a) and
returns it to the level in normal FWD mode
within 1 second. (Spec.5-2)
If specification 5-2 is not satisfied in wave-
form A or B shown in the figure, check the
tape running at the drum entrance side. (Refer
to Section 4-3.)
If specification 5-2 is not satisfied in wave-
form C shown in the figure, check the tape
running at the drum exit side. (Refer to
Section 4-3.)
2 Check that the tape curl at the lower flange of
TG-0 is less than 1/10 of the tape width.
(Spec.6)
If the specification 6 is not satisfied, adjust
the height of TG-1 and TG-2.
4-14
. Alignment tape: YR2-1A (IDR : 0 to 200000)
specification waveform
Spec.5-1: The RF envelope waveform turns to the
maximum level with the even level within
1 second.
waveform A
a b
waveform C
a
Spec.5-2: b x 100 > 70%
a
The output level (b) is more than
70% of the level in normal FWD
mode (a) and returns it to the level in
normal FWD mode within 1 second.
TG-0
Spec.6: Lower flanges of TG-0
The tape curl is less than 1/10 of the tape
width.
Tracking Check (VAR_ _ _ _ _ 1 → → → → → FWD)
waveform B
a b
b
GY-8240UWD
GY-8240FC