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Electrical Adjustments
Input mode Computer 2 (RGB)
Input signal XGA computer signal
Signal patterns 16-step gray signals
1. Enter the service mode.
2. Select Group
"104",No."217"(Red) or "223" (Blue),
and change Data values respectively to make a
proper white balance.
3. Confirm that the same white balance is obtained
in video and computer input.
10. White Balance adjustment [PC]
Equipment Luminance meter
Input mode Computer 2 (RGB)
Input signal 100%-white and 50%-gray
computer signal
1. Enter the service mode.
2. Input the 100%-white computer signal and measure
luminance on the screen with the luminance meter.
It is
A for the reading of luminance meter.
3. Change the signal source to the 50%-white
computer signal.
4. Select Group
"104", No. "220" and change the Date
value to make the reading of luminance meter to be
A x 22%.
9. 50% White adjustment [PC]
Input mode Computer 2 (RGB)
Input signal XGA computer signal
Signal patterns 50% R, G, B whole signals
1. Enter the service mode.
2. Select Group
"104",No."76" and change data
value to "2" to reduce the panel frequency.
3. Change data value to obtain the minimum flicker
for each color on the screen.
Group - No. Adjustment
105 - 9 for red flicker
105 - 10 for green flicker
105 - 11 for blue flicker
4. Select Group
"104",No."76" and change data value
to "0" to reset the panel frequency.
8. Common Voltage adjustment
Input mode Video
Input signal Composite video signal
Signal patterns 16-step gray signals
1. Enter the service mode.
2.Select Group
"104", No."217" (Red) or "223"
(Blue), and change Data values respectively to
make a proper white balance.
3.Confirm that the same white balance is obtained
in video and computer input.
12.White Balance adjustment [Video]
After replacing the G-sensor circuit (IC3851and periph-
eral circuit and memory IC ( IC1391), readjust the
Keystone
Offset adjustment as follows:
1. Put the projector on a horizontal place with the
adjustable feet being minimum range and then enter
the service mode.
2. Select Group
"75", No. "3" and set data value from
"0" to "5".
3. By pressing the
SELECT button, the Keystone
Offset adjustment will start.
4. When it has completed, the
"OK" message will ap-
pear on the screen.
5. By pressing any button on the projector or the
remote control, the "OK" message will disappear.
(Data value of Group "75", No. "3" will be back from
"5" to "0" for initial value.)
13.Keystone Offset adjustment
Equipment Luminance meter
Input mode Video (Video)
Input signal 100%-white and 50%-gray
composite video signal
1. Enter the service mode.
2. Input the 100%-white composite video signal
and measure luminance on the screen with
the luminance meter. It is
A for the reading of
luminance meter.
3. Change the signal source to the 50%-white
composite video signal.
4. Select Group "104", No. "220" and change
the Data value to make the reading of luminance
meter to be A x 22%.
11. 50% White adjustment [Video]
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