Optoma EP783 Service Manual page 53

6. Focus Test
Procedure
Inspection item
Criteria
7. Color Performance
Procedure
Inspection item
Criteria
- Test equipment: video generator
- Test signal: analog 1024 x 768 @60Hz
- Test Pattern: Full screen
- Focus check
- From screen 2 M via visual to check the
focus, look at the entire screen, focus shall
be clear, crisp, and sharp over the entire surface
of the display pattern. (Blur word on one of the
corner after adjustment is acceptable. However,
the word should at least be recognizable.)
- Test equipment: video generator.
- Test signal: HDTV Source 480P,720P,1080i,1080P
- Test Pattern: Master, 64 gray RGBW or SMPTE bar
* Please refer to 4-2 to get into service mode. Use
720p & 1080p signal, master pattern to do HDTV
test. Color cannot discolor to purple and blue.
- Check if each color level is well-functioned.
- Color saturation
- Screen appears normal. It should not have any
abnormal condition, such as lines appear on the
screen and so on.
- Color appears normal.
- It is unacceptable to have few lines flashing.
- RGBW should all appear normal on the screen and
sort from R -G-B-W.
- Color levels should be sufficient and normal. (The
unidentified color levels on both left and right sides
should not over 4 color levels.)
- Gray level should not have abnormal color or heavy
lines.
- If color appears abnormal, please get into service
mode to do color wheel index adjustment.
EP783/EP783S/EP783L/OPX5000/TX783L/TX783S Confidential
Full screen
Master
64 gray RGBW
SMPTE BAR
4-6