Ctl Head Position Adjustment - Sony DVW-250 Maintenance Manual

7-2-3. CTL Head Position Adjustment

Checks
1. Playback the alignment tape.
Play back the alignment tape ZR2-1/1P (from 00:00 to
15:00).
2. CTL head position check
(1) Turn the tracking control volume using a screwdriver
so that the output level at the center of the RF wave-
form is the maximum. Check that the marker of the RF
waveform is output during the low level of the CTL
PULSE.
(2) Turn the tracking control volume to center click
position. Check that the output level of the RF wave-
form with the marker does not change and as same as
the level of the step (1).
If not, perform step 3) and later.
Adjustments
3. CTL head position adjustment
(1) Turn the tracking control volume to center click
position.
(2) Turn the two screws which secure the entrance head
assembly 1/4 to 1/2 turn.
(3) Put the (–) 3 mm screwdriver in the notch of the
entrance head assembly.
(4) Turn the screwdriver and adjust the CTL head position
so that the marker of the RF waveform is output during
the low level at the CTL PULSE, and the output level
at the center of the RF waveform is the maximum.
(5) While holding the screwdriver in the step (4), tighten
the two screws.
4. CTL head position re-check
Re-check the CTL head position according to steps 1) and
2).
n
• After adjustment, set the switch S700-1 on the EQ-54
board to OFF.
• On the setup menu, set AUTO TRACKING to first state
(OFF or ON).
7-12
RF waveform(CH-1)
65
CTL pulse(CH-2)
Screw
Enterance heads assembly
Marker
50 50
35 50
Screw
Notch
DVW-250/250P