LG AN110B Service Manual page 16

9. CWI/White Balance Measurement
Condition
(1) CWI and White Balance is adjusted using the
measurement of color coordinate. So periodically adjust
within time set and you should provide the replacement
equipment to use the correction.
(2) Adjust the screen size to a minimum of 40 inches.
(3) Place the CL-200 on the center of projection screen.
(4) Make the measurement condition under 1Lux for CL-200
to measure the correct color coordinate.
10. CWI Adjustment
10-1. Setting of the Device
: Set the equipment as <Fig.10>.
SCREEN
Measurement standard : Lens shift $ Center (0%)
<Fig.10> Device setting diagram for CWI adjustment
10-2. Required Test Equipment
(1) Illuminometer (Model : CL-200) 1EA : Chromaticity
measurement from projection screen center.
(2) PC input equipment (Pattern Generator, PC)
(3) Set fixing device 1EA
(4) Remote control for adjustment 1EA
10-3. Preparation for Adjustment
(1) Connect the power cord and turn the set on, then connect
it to a PC input.
(2) Enter the CWI menu by using the Adjust key on the
remote control for adjustment. (Default value : 45)
(3) After entering CWI, a full red screen will display when
selecting "EXIT". At this time, see the value of the
Illuminometer color coordinates(X,Y) on the center.
Colow wheel index
CWI = 45
<Fig.11> TEST pattern (RED pattern)
10-4. Sequence of Adjustment
(1) Adjust CWI to the left/right value by using the volume keys
at the first adjustment value is preset to 330.
(2) Illuminometer color coordinates change when pressing
volume keys.
Illuminometer
Equipment to monitor Lx,X,Y data
PC input
Set
(Computer or Pattern)
Set fixing device
(3) X coordinates usually get maximum value at
X=0.637±0.02 and Y coordinates usually get minimum
value at Y=0.350±0.02. Adjust this value by pressing
volume button on the remote control. Adjustment range is
usually 330~340 and average value is 335.
(4) Check the red pattern whether it is entirely uniform. If it is
uniform, exit by pressing the ENTER key after pressing the
EXIT key(FULL-RED disappear).
11. White Balance Adjustment
11-1. Required Test Equipment
(1) Illuminometer (Model : CL-200) 1EA : Chromaticity
measurement from projection screen center
(2) Pattern Generator (DVI input)
(3) Set fixing device 1EA
(4) Remote control 1EA
11-2. Equipment Composition
- Compose the equipment as <Fig. 12>
cable -2
Measurement standard : Lens shift $ Center (0%)
<Fig.12> Device setting diagram
- Cable-1 : RS-232 CABLE that connect RS-232 JACK of
AN110(SET) with COM1-port(RS-232) of PC
- Cable-2 : CL-200 Cable that connect D-out of CL-200 with
COM2-port (RS232) of PC.
11-3. Sequence of Adjustment
(1) After connecting as above, execute "CCA.exe" program at
PC for adjustment.
(2) When program is executed, un-check the "Medium
inspection".
(3) Click the Auto Measure then white balance is adjusted
automatically.
(4) If adjustment is completed, it is displayed "OK" on window.
(3)
(2)
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Illuminometer
Equipment to monitor Lx,X,Y data
Set
Set fixing device
cable -1
PC for adjustment automaticlly
Setting CCA(automatic adjustment program)
(4)