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6. Vertical Linearity Adjustment.
Conditions: (a) Set timing in Mode 12 (57K)
(b) Set the image in crosshatch pattern.
(1) Vertical Linearity.
adjust VR602 to make the top and botton cell are equal in vertical height,
7. Adjustment of White Balance
Following the under processores:
(1)
Make sure the VR401-402-403-404-405-406 are all in the middle position.
(2)
Disable the video signal.
Set the external brightness and contrast VR in Max. position.
(3)
Use a color analyzer (MINOLTA TV-2130), adjust the SCREEN VR till the raster has the
(4)
illumiance of 3 F/L.
Measure the TP402 (by scope), adjust VR405 and set the black level in 92-96 VDC.
(5)
Set the image in color bar pattern and has the brightness VR in Min. contrast VR in Max.
(6)
position.
Adjust VR402 let the amplitude (peak to peak) to be 45 Vp-p.
(7)
Disable the video signal.
(8)
Use a color analyzer, set brightness to Max. position, adjust white balance of raster.
(9)
Fix VR405 adjust VR404 VR406 till the white balance of raster is Y=1.8 ~ 2.7 F/L, y =
(10)
311 ± 10,x=281 ± 10.
Set the image in bright pattern, change the brightness to Min. poaition, measure the
(11)
illuminance up to 20 ± 1 F/L by adjusting contrast VR.
Fix VR402, adjust the VR401, VR403 to make the white balance of balance is Y = 20 ±
(12)
y=
1 F/L,
311 ± 10,x=281 ± 10.
8. Focus Adjustment:
Set the Timing in Mode 12(57K) and has the image of Test pattern, Adjust Focus VR till the
image reaches its best clear.
-13-
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