6-4
EP731
SERVICE MANUAL
Introduction Fundamental Principle Mechanical Construction Procedure of Disassembly Function of Boards Specifications
Troubleshooting
Function Test and Alignment Procedure Firmware Upgrading Procedure DDC Key-In Procedure Appendix
6-2.1 A. Power Troubleshooting
Start
End
No
Yes
Is Power
LED indicator
OK ?
Is Fan working ?
Yes
Change
DC-DC
No
Yes
No
Change
Main Board
Supply
AC power
No
Check Power
cord & input power
voltage
Lamp
Cover assembly
OK ?
Change
DC-DC
No
Yes
No
Change
Fan
Module
Is Lamp lit ?
No
Change
Thermal
Board
Reassembly
lamp Cover
No
Yes
No
Change
Ballast
Yes
Is Lamp LED
indicator OK ?
Is Temp
LED indicator
OK ?
No
Change
Lamp Module
No
Change
Main Board
No
Change
Ballast
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