LG RD-JT51, Service Manual

Page: 19 / 132

19
4. HDTV Color Adjustment Procedure
Equipment:
Pattern generator (VG-828)
Lux meter (CL-100)
Procedure:
Offset adjustment:
1. Black coordinate spec:
Osram lamp Oshio lamp
x0
0.281 0.01 0.313 0.01
y0
0.311 0.01 0.329 0.01
2. The variance of color coordinate via Pb offset and Pr offset:
x y
Pb offset x y
Pb offset x y
Pr offset x y
Pr offset x y
If we line the x and y, then the Pb offset is the shift action and the Pr offset is the
rotational action.
1. Connect power, YPbPr Video into projector.
2. Change Timing and pattern of pattern generator :
3. Timing : 480P(H:31.54 KHz,V:60.08 Hz)
4. pattern : black
5. Light on projector
6. Set user OSD values to default.
7. Enter factory mode.
8. Set Factory values to default.
9. Follow the PbPr offset adjustment flow chart: