T R O U B L E S H O O T I N - Optoma EP774 Service Manual

J4P serial
By checking operations during normal usage time, it is possible to carry out judgments on malfunction to a certain
Connect the power cord
POWER: Light
POWER、READY:ON
YES
POWER:
READY: 1 Blink
POWER:
Waiting Power On
Company Confidential
3. TROUBLE SHOOTING
YES
NO
4 Blinks
NO
7 Blinks
NO
Optoma_______________________
1. Check cable of Power Supply Unit and thermostat Ass'y.
NO
2. Check the connection of Power Supply
to CN900 of Main board).
3. Check Power Supply Unit malfunction.
4. Check keypad connection.
YES
1.Check Thermal sensor1 Transistor (
2.Check Thermal sensor IC (
YES
1. Check Lamp Cover Switch is not attached.
2. Check Lamp Cover connector (CN12) is open.
16
Rev. 01
(CON201 of Power board
Q702 ) malfunction.
U709 ) malfunction.
Delta____________
2007/06/13