Delta Elec. Inc.
EP7155i & EP1691i
Company Confidential Optoma_______________________ Delta____________
21
2010/01/11
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
No
No
Yes
Yes
Connect the power cord
POWER
:
Flash Green
Lamp : OFF
Temp: OFF
POWER: 7 Blinks
POWER: 4 Blinks
Lamp: OFF
Temp: OFF
• Cable of Power Supply Unit and thermostat Ass’y.
• Check the connection of Power Supply (CN900 to C0N2)
• Power Supply Unit malfunction
• Check keypad connection
•Lamp Cover A’ssy is not attached
•Switch (CN343) is open
•Thermostat is not attached.
•Connector (CN342) disconnected.
•Thermal sensor PWB Ass’y check.
Yes
Press “power key”
POWER: Flash Green
Lamp: OFF
Temp: OFF
No
POWER: 8 Blinks
•DMD chip error.
•DMD Board PWB Ass’y check.
Yes
Yes
Yes
Yes
No
No
No
No
No
