Acer SPECTRUM Series Service Manual page 20

There is an 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 ?
Adjust VR201 until maximal, measured Y =
240±10 cd/m2 ?
If the Y less than 160 cd/m2 (after the VR201=
MAX, contrast, brightness = max) then change the
LAMP of panel
NG
NG
Page 20 of 82
If Y can reach ＞190 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
blacklevel value, you will see the sign PASS ,if
FAIL , manual adjust the blacklevel until value 43 !
Set contrast, brightness to max, and turn the VR201
to max , wait for 20 minutes until the luminance Y
stable
The Y should be larger than 200 cd/m2
(for panel which already use for a year, the Y
luminance might be a little down, around 180
cd/m2, there is acceptable too)
Follow this manual page 7 item 4-2 method to
more detail procedure for do a white-balance
adjust