Sony Betacam SX DNV-5 Maintenance Manual page 178

4-2-2. Video Tracking Adjustment
Confirmations
1. Video tracking confirmation
(1) Set switch S110-2 on the MDC-5 board to ON.
ST2 (D106) then blinks. This enables the
tracking control operation.
(2) Play back the tape top portion (00:00 to
15:00) of the alignment tape SR2-1/1P.
(3) Confirm that the levels on the entrance and
exit sides do not exceed the output level in
the center when the tracking control (RV100)
on the MDC-5 board is turned.
If the output level on the entrance or exit
sides exceeds the output level in the center,
perform the adjustment (on the drum entrance
or exit side) in steps 5 and later.
(4) Turn the tracking control so that the RF
signal waveform is 80% of the maximum
output level. At that time, confirm that the RF
signal waveform satisfies specifications 1 to
3. If these specifications are not satisfied,
perform the adjustment (on the drum entrance
or exit side) in steps 3 and later.
2. Video tracking confirmation in various
modes
(1) Put the unit in a horizontal position and then
in a vertical position. At that time, confirm
that the RF signal waveform satisfies specifi-
cations 1 to 3.
If these specifications are not satisfied,
perform the adjustment (on the drum entrance
or exit side) in steps 3 and later.
(2) Put the unit in a horizontal position again and
repeat the mode selection of EJECT to PLAY
two or three times. At that time, confirm that
the RF signal waveform in the PLAY mode is
the same as the former waveform without
change and that specifications 1 to 3 are
satisfied. If the RF signal waveform is changed
or if these specifications are not satisfied,
perform the adjustment (on the drum entrance
or exit side) in steps 3 and later.
(3) Also when the following operations are
repeated two or three times, confirm that the
RF signal waveform in the PLAY mode is the
same as the former waveform without change
and that specifications 1 to 3 are satisfied.
. When the unit is put from the REV x5 state
to the PLAY state
. When the unit is put from the STOP state
to the PLAY state
If the RF signal waveform is changed or if
specifications 1 to 3 are not satisfied,
perform the adjustment (on the drum
entrance or exit side) in steps 3 and later.
Entering the REV x x x x x 5 Mode
Press the PLAY button, then the REW button.
(Both the PLAY and REW buttons on the
keyboard light.)
4-20
S110-2
ON
Specifications 1 :
The output of the whole waveform should be more than
85% of the maximum value.
B
> 0.85
A ,
B, C, and D are the output value of the waveform's
rising and falling edges and minimum value portion,
respectively.
Specifications 2 : The fluctuation value in each portion of a waveform
should be less than 10%.
F
> 0.9
E ,
F and E, G and H, and I and J are the upper and lower
values of the waveform's rising and falling edges and
the fluctuation in the waveform center, respectively.
Specifications 3 : Tape runs in contact with the upper flange of S1 and
T1 tape guides.
The allowable tape curl is 1/10 or below of the tape
width.
RV100
MDC-5 board
2 1
ON
ST2(D106) : Blinking
C D
> 0.85 > 0.85
A , A
G I
> 0.9 > 0.9
H , J
DNV-5
DNW-7/90/90WS