Optoma EX779 Service Manual page 21

Delta Elec. Inc.
Check the
projection
Screen
Check using all black/white screens with
PC connection
Yes
Are abnormalities
noticeable on
projection screen?
Does the lamp
go off during
operation?
Yes
< Fan error >
Power: Blink (Green)
Lamp: OFF
Temp: Blink Red
No
<Over temperture >
Power: Blink (Green)
Lamp: OFF
Temp: Light (Red)
No
SYSTEM OK
Company Confidential
21
EX779
• Black lines on screen (horizontal and vertical)
Yes
→ DMD Set malfunction
• Missing pixels (Missing white: 1 or more, missing black: 5 or more, or
sequence missing pixels)
→ DMD Set malfunction
• Shadows on screen
→ Dirt on DMD/projection lens surface
• Bluish shadows on corners of screen (during white screen display)
→ Shifted optical axis of Lens Base Unit
• Temperature protector operated due to the increase in
Yes
temperature based on operating environment
• Temperature protector operated due to blocked suction and
exhaust holes or dirty fan
Optoma__________________
System OK
Normal operation
• Connector CN800
• Blower fan (Fan1)
• Connector CN801
• Lamp fan (Fan2)
• Connector CN905
• Power fan (Fan3)
• Connector CN802
• DMD fan (Fan4)
Delta________________
of Fan disconnected
malfunction
of Fan disconnected
malfunction
of Fan disconnected
malfunction
of Fan disconnected
malfunction
2010/04/14