Inspection Procedure - Optoma EP719 Service Manual

4-4

Inspection Procedure

- Frequency and Tracking
Test Signal : 1024x768@60Hz
Test Pattern : Line Moire Pattern
* Check and see if image sharpness and focus are well performed.
* If not, readjust by following steps.
(1)
(2)
- Boundary
Test Signal : 1024x768@60Hz
Test Pattern : Boundary Frame
* Adjust Resync or Frequency/Tracking/H. Position/V. Position to the inner of
the screen.
- Focus
Test Signal : 1024x768@60Hz
Test Pattern : Text Pattern
* Adjust the center clearly, meanwhile, one slightly vague corner in the image is
allowed
- HDTV
Equipment : Quantum Data 802B or CHROMA 2327
Test Signal : 480p, 702P, 1080I
Test Pattern : Color Bar
If the test result was discoloration or flickering, please return the unit back to the
repair center.
- Color Performance
Test Signal : 1024x768@60Hz
Test Pattern : 64 RGBW scale Pattern and Gray 16 Pattern
* Please check and ensure if each color is normal and distinguishable
* If not,please adjust color index of the service mode.
Select "Frequency" function to adjust the total pixel number of pixel
clock in one line period.
Then select "Tracking" function and use right or left arrow key to adjust
the value to minimize video flicker.
EP719 / EP716 / EP719R / EP716R /
4-5
EP719P / EP716P