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Electrical Adjustments
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Select group no. “
680”, item no. “0” and change data
value from 0 to 1. The projector starts self-adjust-
ment. When the adjustment completes correctly, "OK"
will appear on the screen. IF "NG" appears, try this
adjustment again.
m PC Input adjustment
1. Receive the 16-step gray scale computer signal with
Input 3 [video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “TP531” (+) and
chassis ground (-).
4. Select group no. “300”, item no. “2” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
5. Receive the 16-step gray scale component video sig-
nal (Y/Cb/Cr 480p) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
6. Select group no. “300”, item no. “0” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
7. Receive the 16-step gray scale component video sig-
nal (Y/Pb/Pr 1080i-60) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
8. Select item no. “0” and change data value to adjust
waveform “a” to be minimum amplitude.
9. Receive the 16-step gray scale component video sig-
nal (Y/Pb/Pr 720p) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
10. Select item no. “0” and change data value to adjust
waveform “a” to be minimum amplitude.
11. Receive the 16-step gray scale component video
signal (Y/Cb/Cr 480i) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
12. Select item no. “0” and change data value to adjust
waveform “a” to be minimum amplitude.
(a)
White Level
, A/V Input adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Project only green light component to the screen.
4. Select group no. “200”, item no. “12” and change data
value to obtain the minimum flicker on the screen.
5. Project only blue light component to the screen.
6. Select item no. “13” and change data value to obtain
the minimum flicker on the screen.
7. Project only red light component to the screen.
8. Select item no. “14” and change data value to obtain
the minimum flicker on the screen.
. Common Center adjustment
1. Receive the 100% whole-white computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Measure luminance on the screen with the luminance
meter. It is A for the reading of luminance meter.
4. Change the signal source to the 50% whole-white
signal with Input 1 [RGB(Analog)] mode.
5. Select group no. “200”, item no.“15” and change data
value to make the reading of luminance meter to be
A x 22±1%.
Note:
If the luminance meter is not equipped, you can take
another method instead as follows;
1. When the main board is replaced, the data value at
group no. “200”, item no. “15” of the previous main
board should be copied manually.
⁄0 PC Gamma-shift adjustment
1. Receive the 50% whole-white computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode, select group no. “200”, item
no. “16”(Blue) or “17” (Red), and change data values
respectively to make a proper white balance.
⁄1 PC White Balance adjustment