3M
Multimedia Projector MP8670/8745/8755/8770
Adjustments
Copyright
2000, 3M IPC. All Rights Reserved.
1-4
1-6.
Convergence
The purpose of this procedure is to properly check the Red, Green, and Blue liquid display (LCD) panels
so that the three colors are aligned at the same location and at the center of the screen.
This allows for projection of the color White.
If it is determined that convergence is a problem, the entire LCD assembly must be replaced.
1-6-1.
Necessary Tools
•
Quantum Data™ 801GX Video Test Generator or equivalent
•
MP8670/8745 Remote Control.
1-6-2.
Set Up Test Generator
1.
Plug in the video test generator to the
RGB
terminal jack located on the backside of the
MP8670/8745.
2.
Input the
SVGA (MP8670) or XGA
(MP8745) VESA
(
60
) cross-hatch timing
signal.
3.
The voltage settings for each input color
need to be programmed into the video test
generator. Refer to the video test generator
user's guide for further assistance.
4.
Turn on the MP8670/8745, and allow it to
run for 10 minutes. This warms up the LCD
panels.
5.
Position the projector so that the projection
image is approximately 70 inches diagonally
with the
W-Zoom
button on the remote
control set to
Max
.
6.
Press the
Menu
button on the remote
control, and then use the
Reset
button to
return the
Setup
menu controls to the
default settings.
7.
Press the
Menu
button on the remote
control once again, and from the
Setup
menu, adjust the
H-Phase
so that “jitter”
(flicker) is not evident in any of the
horizontal or vertical lines of the crosshatch
pattern. Adjust for the lowest possible value
where “jitter” is not seen (usually 6 or
lower).
8.
Adjust the
Focus
so that the projection
images vertical and horizontal lines of the
crosshatch pattern are crisp and clear.
