Barco R9002031 - Manual (Page 40)

Appendix B: G2 adjustment
B-1 5975996 BARCODATA 808s 170397
B
G2 ADJUSTMENT
Once the on-screen menu "G2 ADJUSTMENT" is displayed, proceed
as follows :
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<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.
Retaining screws
•
Remove the top cover from the projector (see p.4-1) and open the
front metal protection cover by turning out the 3 retaining screws on
both sides.
•
A green LED is mounted on each of CRT sockets (see Photo 2).
When selecting the G2 adjustment menu, these green LEDs must
be out. If not, follow the procedure below to adjust the G2 :
- Open the second metal cover by turning out the retaining screws
on both sides and pivot the cover to the front side of the projector
(see Photo 1);
- Adjust the G2 potentiometers (see Photo 3) very slowly with a
plastic tweaker until the LED of the corresponding amplifier just
stops illuminating. Repeat the adjustment for the other colors;
- After the three G2 potentiometers have been correctly adjusted,
close both metal covers and secure with the retaining screws.
1
2 3
Red potentiometer Blue potentiometer
Green potentiometer
After finishing the adjustments :
Press the <ENTER> key to continue with the "SERVICE" menu.
Press the <EXIT> key to return to the "SERVICE" menu.
Press the <ADJUST> key to return to Operational mode.
Green LEDs