BenQ PB8220 - XGA DLP Projector, Service Manual

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Procedure:
I. Gray
Level:
1. Connect power, D-sub (or BNC), into projector.
2.
Change Timing and pattern of pattern generator:
Timing: 800x600@60Hz (H: 37.879Khz, V: 60.317Hz)
Pattern: gray 32
3. Light on projector
4. Adjust user OSD values to default.
5. Enter factory mode.
6. Adjust Factory values to default.
7. Adjust the Brightness of AD9883 (RGB) to let the black level of the gray 32 to just
distinguish.
8. Use Lux meter to measure the white level of the gray 32. Adjust the contrast value of
AD9883 (RGB) to let the light output to just max.
9. Check the 32 levels of gray. All steps must appear,
II. Color Temperature:
1. Change Timing and pattern of pattern generator:
Timing: 800x600@60Hz (H: 37.879Khz,V: 60.317Hz)
Pattern: 80% gray
2. Color temperature spec:
Warm(0) Standard(1) Cool(2)
Color
temperature
6500
°
K 9000
°
K 11500
°
K
x 0.313
±
0.01 0.281
±
0.01 0.272
±
0.01
y 0.329
±
0.01 0.311
±
0.01 0.283
±
0.01
3. The variance of color coordinate via R, G, B gains:
X Y
R
↓
x
↓
-
G
↓
-
y
↓
B
↓
x
↑
y
↑
4. Adjust the warm color.
5. Open Factory OSD and set the factory default value:
6. User the lux meter and adjust Red Gain, Green Gain, & Blue Gain to met the spec.
7. Store the value to memory.
8. Repeat 5~7 to perform the Standard (2) and Warm (3) color temperature.
7 4