LG RD-JT30 Service Manual page 18

4.HDTV Color Adjustment Procedure
Equipment:
Pattern generator (VG-828)
Lux meter ( CL-100)
Procedure:
(a). Offset adjustment:
Black coordinate spec:
x0
y0
The variance of color coordinate via Pb offset and Pr offset:
Pb offset
Pb offset
Pr offset
Pr offset
If we line the x and y, then the Pb offset is the shift action and the Pr offset is the
rotational action.
Connect power, YPbPr Video into projector.
Change Timing and pattern of pattern generator :
Timing : 480P(H:31.54 KHz,V:60.08 Hz)
pattern : black
Light on projector
Set user OSD values to default.
Enter factory mode.
Set Factory values to default.
Follow the PbPr offset adjustment flow chart:
Osram lamp Oshio lamp
0.281 0.01 0.313 0.01
0.311 0.01 0.329 0.01
x y
x y
x y
x y
x y
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