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Roy and Rosa
 
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Default LCD overhead projector Mistubishi no light

I was given this projector because they said the bulb was too expensive to
replace.
Its a Mitsubishi LVP X70UX.

When turned on the lamp does not come on at all. Not even a strike.
The power LED comes on red 1 second after main switch is turned on.
Then all fans start to turn.
At 3 seconds the lamp LED comes on yellow and the temp led starts flashing
red.
At the same time the fans shut down and the power led flashes red to green
every other second.
The temp led continues to flash once a sec for 4 secs then waits 1 sec and
repeats.
Lamp timer was reset. no change.

I get 393 vdc to lamp powersupply
door switches check good.
Are the temp sensors some kind of thermistor or just a switch?
The fan sensor reads 9 k ohms (measured while disconnected) with 2.9 vdc
across it when on.
Internal sensor 9 k ohms " " "
" 4.6 volts across it.
Lamp sensor 86 k ohms " " "
" 4.7 " " " ".
lamps sensor looks like it is epoxied into a ring lug.
Should these be open or closed ? or are they actual temp readings?

OR is it just really a bad lamp??
Thanks Ropy


 
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