White Balance Alignment - Acer AF705 Service Manual

F. WHITE BALANCE ALIGNMENT
F.1.1 Select timing #6 (VESA 68K 1024X768) with crosshatch pattern, adjust both horizontal and vertical
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OSD's size control to get display size within 310x232p±2mm.
F.1.2 Disconnect R.G.B. signal inputs, adjust OSD's brightness and G1 control to it's maximum position.
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F.1.3 Auto alignment(P103 must be short)
Use automatic alignment equipment and program to get color temperature within specified coordinates.
F.1.4 Manual alignment
P103 must be short in order to into factory mode. Select OSD function to color temperature adjustment.
F.1.5 For 9300( 7500 ; 6500 ) color coordinate ( notes: set the minimum value of R.G.B. bias is 0,
set the value of sub-contrast "SC" is 0 ).
F.1.6 Disable the video pattern( for a raster pattern ), set the maximum value of contrast and
brightness is 255, adjust G1 to Y=0.01 cd/mm
F.1.7 Adjust bias G to get Y=1.8 ± 0.06 cd/mm
Adjust bias B to get y=297 ( y=315 for 7500 ; y=329 for 6500 ) ± 5
Adjust bias R to get x=283 ( x=295 for 7500 ; x=313 for 6500 ) ± 3
F.1.8 Fine tune the bias G and R for x=283 , y=297 ( x=299, y=315 for 7500; x=313, y=329 for
6500 ) ± 3.
F.1.9 Select 7500 and 6500 color coordinate separately. Repeat item 2.5.5 ~ 2.5.8 to
meet specificity.
F.1.10 Adjust brightness control to get raster is <= 0.25cd/mm, change pattern to 2 inch square.
F.1.11 Enable G signal output of pattern generator, adjust gain G to get Y=98 ± 1 cd/mm
F.1.12 Enable B signal output, adjust gain B to get y=297 ( y=315 for 7500 ; y=329 for 6500 ) ± 2
Enable B signal output, adjust gain R to get x=283 ( x=299 for 7500 ; x=313 for 6500 )
F.1.13 Fine tune the gain G and R for x=283 , y=297
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( x=299, y=315 for 7500; x=313, y=329, for 6500 )
F.1.14 Check 150 >Y> 130 cd/mm, if not , adjust G to get Y>130 cd/mm, then repeat item 2.5.12
F.1.15 Change pattern to fall white, adjust SB to get 92< Y <113 cd/mm .
F.1.16 Select 7500 and 6500 color coordinate separately. Repeat item 2.5.11 ~ 2.5.15 to meet
specificity. 7500 X=300 Y=315
2
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6500 X=313 Y=329
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