Optical Engine - Mitsubishi WD-52527 Service Manual

MODEL: WD-52527 / WD-52528 / WD-62527 / WD-62528
Sym ptom
FMT does not turn on lamp due to fault
detection
No DC supply to ballast
No Light
No Lamp enable signal
Lamp end of life
Ballast Broken
FMT does not turn on video
DVI cable not connected
No
Picture, Engine power missing
bad
Engine is blanked.
picture
FMT not providing video signal
Engine broken
No power to Shutter
High
Contrast
No control of shutter
Unit not
FMT does not control shutter
W orking
Shutter broken
Fan not working. Temp sensor.
Set Shuts Filter clogged
down after
Temp sensor problem
a while
Air path blocked
OPTICAL ENGINE TROUBLESHOOTING
Ca use
Check error code on front pannel. Check problem
indicated.
Check power PW B PL connector for approx. 340VDC.
Check connections PL-JE, JE-CN2
Check FMT output Lamplitz FB pin 1. Check
connections FB-FB, CJ3-CJ3
Repace lamp and check
Replace ballast and check
Check diagnostic code. Check circuit indicated.
check DVI connections
Check connections PA2-CN102
Check control connections FC-FC, KC-CN3100.
Check FMT Board.
Replace engine and check.
Check 18V from Power board PB pin4. Check
connections PB-PB, KD-CN1
Check connections CN5-JG, JG-KD, KD-CN2
Replace FMT and check.
Replace engine.
Check error code and check indicated fan or sensor.
Check filter and clean or replace.
Check error code. Check connections DT-KB, LT-KB.
Check sensor
Check air flow from each engine fan.
LCD ENGINE INTERNAL LAYOUT
Page 35
W ha t to che ck