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Appendix B: G2 adjustment
B-1
5975198 RETRODATA 808s 210397
B
G2 ADJUSTMENT
Once the on-screen menu "G2 ADJUSTMENT" is displayed, proceed
as follows :
G2 ADJUSTMENT
<EXIT> to return
Use the potentiometers
on the G2-ADJ. module
to set the screen grid
voltage for Red,
Green and Blue.
Adjust until the LED
on the corresponding
output amplifier is
turned off.
891
- Put the projector in service position 2 (see chapter 'AC power
Connection')
- A green LED is mounted on each driver unit (open the cover on the
oposite side of the lenses). The green LEDs are mounted on the
bottomside (and backside) of the printed circuit board. When
selecting the G2 adjustment menu, these green LEDs must be out.
If not, follow the next procedure to adjust the G2 :
- open the metal cover on the lens side (covering the modules) by
turning out the retaining screws on both sides and pivot the cover
downwards;
- adjust the G2 potentiometers very slowly with a screwdriver until the
corresponding LED just stops illuminating. Repeat the adjustment
for the other colours;
- once the three G2 potentiometers have been correctly adjusted,
close both metal covers and secure with the retaining screws.
Red
2
3
After finishing the adjustments :
Press the
ENTER to continue with the "SERVICE" menu.
Press the
EXIT to return to the "SERVICE" menu.
Press the
ADJUST to return to Operational mode.
Green LEDs
Green
Blue
Service position 2
Access tube
unit
front side
A
ccess
e
lectronics
r
ear side