Test Condition; Inspection Procedure - Optoma EP780 Service Manual

4-3 Test Condition

- Circumstance Brightness : Dark room less than 2.5 lux.
- Inspection Distance : 1.5m~3m for functional inspection
- Screen Size : 60 inches diagonal (wide)
- After repairing each HD72, the unit should be run-in (Refer to the table below).
Symptom
Normal Repair
NFF
Auto Shutdown

4-4 Inspection Procedure

No Step
 Frequency
and Track-
ing
2 Boundary
3 Focus
Confidential
Run-in Time
2 Hours
4 Hours
6 Hours
Specification
Eliminate visual
wavy noise by
Rsync, Frequen-
cy or Tracking
selection.
Horz. And Vert.
position of
video should be
adjustable to
be the screen
frame.
The text in the
corner should be
clear after adjust
the focus ring.
Procedure
- Test Signal :
1024x768@60Hz
- Test Pattern :PANA-ICON
- check and see if image
sharpness and focus
are well-performed.
- No video noise is al-
lowed.
- Test Signal :
1024x768@60Hz
- Test Pattern : General 1
- Adjust Resync or
Frequency / Tracking /
H. Position / V. Position
to the inner of the screen.
- Test Signal :
1024x768@60Hz
- Test Pattern : Full Screen
- Adjust the center clearly;
meanwhile, one slightly
vague corner in the im
age is allowed.
4-2
Photo
EP780