Sanyo PLC-SU20B, Service Manual

Page: 31 / 100

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Electrical Adjustments
[CG WHITE BALANCE ADJUSTMENT]
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Enter to the service mode, select item no. “16” (Red)
or “17” (Blue), and change data values respectively to
make a proper white balance.
[MCI WHITE BALANCE ADJUSTMENT] *
4. Receive the 16-step grey scale MCI signal.
5. Set to MCI mode.
6. Select item no. “16” (Red) or “17” (Blue), and change
data values respectively to make a proper white bal-
ance.
[AV WHITE BALANCE ADJUSTMENT]
7. Receive the 16-step grey scale video signal.
8. Set to VIDEO mode.
9. Select item no. “16” (Red) or “17” (Blue), and change
data values respectively to make a proper white bal-
ance.
Confirm that the same white balance is obtained in
video, MCI and computer mode.
WHITE BALANCE ADJUSTMENT
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
[R-COMMON CENTER ADJUSTMENT]
3. Cover the G and B panel to block the light transit.
4. Adjust VR3502 to obtain the minimum flicker on the
picture.
[G-COMMON CENTER ADJUSTMENT]
5. Cover the R and B panel to block the light transit.
6. Adjust VR3503 to obtain the minimum flicker on the
picture.
[B-COMMON CENTER ADJUSTMENT]
7. Cover the G and R panel to block the light transit.
8. Adjust VR3504 to obtain the minimum flicker on the
picture.
COMMON CENTER ADJUSTMENT
[AV BLACK BALANCE ADJUSTMENT]
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
3. Enter to the service mode, select item no. “9” (Red) or
“10” (Blue), and change data values respectively to
make a proper white balance at darker part of the
screen.
BLACK BALANCE ADJUSTMENT