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Appendix B: G2 adjustment
B-1
5975638 BARCOGRAPHICS 1209s 040598
B
G2 ADJUSTMENT
Once the on-screen menu "G2 ADJUSTMENT" is displayed, proceed
as follows :
<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.
* Remove the top cover from the projector.
* A green LED is mounted on each of these amplifiers.
When selecting the G2 adjustment menu, these green LEDs must
be out. If not, follow the next procedure to adjust the G2 :
1 open both metal cover by loosening the retaining screws on both
sides and pivot the covers to the front side of the projector;
2 adjust the G2 potentiometers very slowly with a screwdriver until
the LED of the corresponding amplifier just stops illuminating.
Repeat the adjustment for the other colors;
3 once the three G2 potentiometers have been correctly adjusted,
close both metal covers and secure with the retaining screws.
1
Green LEDs
Red Green Blue
2
3
After finishing the adjustments :
Press ENTER to continue with the "SERVICE" menu.
Press EXIT to return to the "SERVICE" menu.
Press ADJUST to return to Operational mode.
Retaining screws