LG RD-JT51, Service Manual

Page: 25 / 132

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7. TV Color Alignment Procedure
(A) Composite Video & S-Video
Equipment:
- Pattern generator (VG-828)
- Lux meter (CL-100)
OSD Default value:
Item Value Item Value
Brightness 0 Brightness Bias Adjustable
Contrast 0 Contrast Bias Adjustable
Sharpness 4 Saturation Adjustable
Hue 0
CM-Red-CF1/2 128/128
CM-Green-CF1/2 128/128
CM-Blue-CF1/2 128,128
Red Gain 128
Green Gain 128
Blue Gain 128
White Peak 2
Gamma Table Linear
Procedure:
I. Gray Level:
1. Connect power, Composite video or S-Video, into projector.
2. Change Timing and pattern of pattern generator:
3. Timing: NTSC (H: 15.73 KHz, V: 29.96 Hz)
4. Pattern: gray 32 (or gray16 only for over-scan)
5. Light on projector
6. Set user OSD values to default.
7. Enter factory mode.
8. Set Factory values to default.
9. Adjust the Brightness and Contrast to let the black level to just distinguish,
and the light output of white level to just max.
10. Check the 32 levels of gray. All steps must appear,
II. Saturation Level:
1. Change Timing and pattern of pattern generator:
Timing: NTSC (H: 15.73 KHz, V: 29.96 Hz)
Pattern: 100% blue
2. Adjust saturation and use lux meter to measure to let the light output just max.