Sim2 Multimedia SVP 420 HB - Manual (Page 23)

SVP 450 PLUS - SVD 500 PLUS
22
B
A
4.8 Lens focus adjustment
Each lens must be focused individually with the tubes
on, one at a time and following this procedure:
1. Select the HATCH test pattern by pressing the TEST
button on the remote control. An external pattern signal
can be used if you prefer.
2. Adjust with a low contrast (e.g. 30) and a medium-low
background brightness (e.g. 40)
3. Turn the other tubes off using the push buttons R,G,B,
on the remote control.
4. Loosen the wing screw (B) of the green lens, turn the
lens assembly either to the right or left to adjust the
focus of the picture in the middle of the screen and
then tighten the screw. (B).
5. Loosen the wing screw (A) of the green lens, turn the
lens assembly either to the right or left to adjust the
focus of the picture on the borders of the screen and
then tighten the screw (A).
6. Look at the screen closely and check the result; repeat
the adjustments if necessary.
7. Repeat steps 3, 4 and 5 for the red and blue lenses
Attention:
DO NOT move the electrostatic focus adjustment
potentiometers. They were factory-set and should only
be adjusted by qualified personnel.
C
D
B
A
Physically move the tube until the blue cross is perfectly
over the green. Tighten the four screws when you have
finished.
Repeat this procedure again for the red tube.
At this point it is necessary to recheck the focus of the red
and blue.
4.10Magnet adjustment
If you wish to change the adjustment set at factory,
read this chapter through.
1. Switch on the projector without changing the factory
setting.
2. Use a monoscope signal (or a signal with central
reference) as input signal and mark the picture centre
on the screen
.
3. Switch off the video projector.
4. Carry out the appropriate deflection settings.
5. Unscrew the 2 screws on the bracket in the projector
centre and turn the convergency card as indicated in
the figure.
A
B
4.9 Mechanical centering of the
tubes
Select the CROSS HATCH signal with the remote control.
For an installation different to factory setting (90”) the
mechanical centering of the red and blue tubes needs to
be adjusted.
Looking at the following figure, unscrew (only 2 turns!)
the screws (A-B-C-D) of the blue tube.