Philips 105S2 CM23 GSIII Service Manual page 24

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Electrical Adjustments (Continued)
6. Picture geometry setting
- Apply a video signal with cross-hatch pattern.
6.2 Apply a video signal in the 1024 x 768 with 60 kHz/75 Hz mode.
6.3 Set contrast control at Max. position, and brightness control in
the mid-point.
6.4 Alignment of horizontal geometry and vertical geometry
6.4.1 Adjust the H-width to 270 mm
6.4.2 Adjust the H-phase to center position.
6.4.3 Adjust V-size to 202mm.
6.4.4 Adjust V-Position to center.
Adjust/Trapezium/pincushion
6.4.5 Adjust picture tilt via I C BUS for correct top/bottom lines.
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6.4.6 Adjust the top and bottom corner by I C to straight vertical lines
of the left and right edge.
6.4.7 Adjust the parallelogram by I CBUS to get optimum vertical line.
6.4.8 Adjust the unbalance pin by I C BUS to get optimum vertical
line.
6.4.9 Adjust the unbalance Vertical linearity balance by I C BUS to
get optimum vertical linearity balance.
6.4.10Adjust the unbalance Vertical linearity by I C to get optimum
vertical linearity.
6.5 Adjust size/centering/trapezium/pincushion/parallelogram
of all other preset modes via I C bus.
6.6 Preset factory preload timing according to step 6.5 values.
7. Alignment of Vg2 cut-off point, white tracking
Equipment : 1. Video Test Generator-801GC (Quantum Data)
2. Color-analyzer (Minolta CA-100)
VG2 [(screen), at the bottom of the L.O.T.].
* Apply a video signal in the 1024 x 768 with 60 kHz/75 Hz mode,
select the "full white pattern" (sizes 270 x 202 mm).
* Use color-analyzer (Minolta CA-100) to adjust cutoff and
white uniformity.
OSD R/G/B cut-off and R/G/B gain can be accessed, with
initial data:
9300 K
o
R cutoff = 25%, R gain = 65% (I C)
G cutoff = 25%, G gain = 65% (I C)
B cutoff = 25%, B gain = 65% (I C)
6500 K
o
R cutoff = 25%, R gain = 55% (I C)
G cutoff = 25%, G gain = 55% (I C)
B cutoff = 25%, B gain = 55% (I C)
Brightness = 50%, Sub-Contrast = 85%, ABL = 50% (I C)
Step 1: To press power button switch
simulaneously to entert the character "ASUS15 V2.21
20000406" as shown in Fig.2.1, press "
OSD menu for R/G/B gain & cutoff as shown in Fig. 2.2.
Step 2: Press " " for function selection as shown in Fig. 2.2.
MODEL SELECT
ASUS15 V2.21 20000406
3Back
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and left & right
" to access the
9300 BIAS R G B
6500 BIAS R G B
FOCUS(H V) VLIN BAL USER
RASTER(H V) LIN ( H V ) SUB
SUB T CORNER
H EHT
EXIT
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BIAS R G B : R(red) G(green) B(blue) cutoff
GAIN R G B : R(red) G(green) B(blue) gain
FOCUS : Horizontal and Vertical Focus
VLIN BAL : Vertical Linearity Balance
USER : Horizontal size range
RASTER H: Horizontal DC (raster) Shift
RASTER V: Vertical DC (raster) Shift
HLIN : Horizontal Linearity
V LIN : Vertical Linearity
SUB : Zoom range
SUB : Sub Contrast
T CORNER: Corner Correctionof TOP
ABL : Auto Beam Limit
H EHT : Horizontal Extensive High Tension
7.2 Connect the video input, set brightness control at center, and
contrast control at maximum
7.3
set R,G,B cut-off at 127 9300k and 6500K(EEPROM preload value)
R,G,B gain at 77 9300k and 6500K(EEPROM preload value)
ABL at 127 9300k and 6500K(EEPROM preload value)
SUB-CON at 218 (EEPROM preload value)
7.4 Adjust 9300K color:
With the help of a factory calibrated color analyzer CA 100
set low R,G,B scale 100=0.12FL,x=283,y=297
Adjust Vg2 until brightest gun at 100 on low brightness scale.
7.5 Adjust R,G,B cut-off for all gun reading to get 100 on low
brightness scale.
7.6 Set CA100 high R,G,B scale 100 = 41+/- 1FL,X=283,y=297
Adjust G gain at 100 scale on high brightness scale.
7.7 Adjust R,B gain so that blue and green have the same reading as
red on the high brightness scale
7.8 Set contrast at minimum and repeat 7.5,7.6,7.7,until RGB three
guns get same readings on low and high brightness scale.
7.8.1 Adjust SUB-CON to get Y=41+/- 1FL
7.8.2 Apply full white pattern, Adjust ABL to reach 30+/- 1FL(contrast
at Max.)
7.9 Adjust 6500K color:
With the help of a factory calibrated color analyzer CA 100
set low R,G,B scale 100=0.12FL,x=313,y=329
7.10 Adjust the R,G,B cut-off for all gun reading to get 100 on low
brightness scale.
7.11 Set CA100 high R,G,B scale 100 = 41+/- 1FL,X=313,y=329
Adjust G gain at 100 scale on high brightness scale.
7.12 Adjust R,B gain so that blue and green have the same reading
as red on the high brightness scale
7.13 Set contrast at minimum and repeat 7.10,7.11,7.12,until RGB
three guns get same readings on low and high brightness
scale.
7.14 Check full white at contrast and brightness at minimum, the
foreground shall be extinguished.
105S2 CM23 GSIII
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GAIN R G B
GAIN R G B
Fig. 2.2
ABL
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