Optoma EX779 - 3. TROUBLE SHOOTING

Delta Elec. Inc. EX779
Company Confidential Optoma__________________ Delta________________
17
2010/04/14
3. TROUBLE SHOOTING
By checking operations during normal usage time, it is possible to carry out judgments on malfunction
to a certain extent. Carry out the following checks before disassembling the equipment.
Waiting
Power On
Yes
Connect the power cord
• Power Supply Unit malfunction
•
Check the connection of Power Supply (Power BD CN201 to MB CN900)
• Check keypad connection
• Check voltage (12v, 5v, 3.3v, 1.8v,…etc) on Main Board.
• Lamp Cover A’ssy is not attached
• Thermal break sensor is open.
• Connector (CN11) on keypad Board disconnected.
<
Stand
-
by >
Power: Blink (Green)
Lamp : OFF
Temp
:
OFF
< System error
>
Power: Blink7 (Green)
Lamp: OFF
Temp: OFF
Yes
< G794 erro
r >
Power: Blink4 (Green)
Lamp: Blink 4 (Red)
Temp: OFF
•
Check the system monitor & fan control IC (U302)
<
Power
supply
error >
Power: OFF
Ready: OFF
Temp:
OFF
Yes
Yes
No
No
No
No