Cha
pter 4
28
Power T
rouble
shooting
Is LED
indicator OK?
Lamp Replacement
Cover assembly
OK?
Reassembly lamp
Replacement Cover
Start
Is Fan working?
No
Yes
No
No
Yes
Yes
Yes
Is Lamp lit?
No
Yes
End
Check power cord
& input power
voltage
Supply AC
Power
Change
DC-DC
No
Change
Thermal BD
Change
Ballast
Change
DC-DC
No
Change
Main BD
Change
Ballast
No
No
Change
Fan Module
Can hear the
sound of lamp
ignition
No
No
Change
Thermal
BD
No
Change
Main BD
Change
DC-DC
No
Yes
Reassembly
Lamp Module
Replace
Lamp Module
No
No
Summary of Contents for PD721
Page 6: ...VI ...
Page 32: ...25 Chapter 3 Removing Engine Module Engine Module ...