Acer AL707 Service Manual page 21

17" lcd monitor
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There is interferences in DOS MODE
NOTE :the criteria of doing AUTO-CONFIGURATION : must be a full-size screen, if the screen not full , the auto-
configuration will fail. So in dos mode ,just set your "CLOCK" in OSD-MENU to zero or use some EDITOR
software which can full fill the whole screen (ex: PE2, HE) and then press "AUTO"
Or you can use "DOS1.EXE" which attached in your Driver disk to optimize DOS mode performance
V. THE PANEL LUMINANCE WAS DOWN
Use white pattern and resolution 1280x1024 @ 60Hz , CHROMA 7120 measured the center of panel
Set Contrast, brightness =maximal, RGB= 50
Quit from OSD-screen, measured Y(luminance)
With chroma 7120, check Y= 240±10 cd/m2 ?
If the Y less than 200 cd/m2 (after the contrast,
brightness = max) then change the LAMP of panel
NG
If Y can reach >240 cd/m2 that means
The lamp still working well, so we just re-do the
white-balance process
As following procedure
OK
Use white-pattern, press MENU button along
OK
with AC power-plug in ( you will in factory
mode) The OSD-menu will be at left-top of
screen,
press AUTO button to automatically adjust black
level value, you will see the sign PASS
Follow White-Balance, Luminance adjustment
as above ( page 8),method to more detail procedure
For do a white-balance adjust
20

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