Question about NEC LT 260K Multimedia Projector
We purchased a lot of NEC LT260 video projectors and have had at least 10 of them stop working in the past 2 months...the lamp hours are low, so it is not a lamp issue, although the error seems to indicate a lamp error. Tey are dropping like flies...funny thing is they are dropping at the same rate that we installed them in...approx - 2 a day...any help would be appreciated.
Thank you -
I think I have solved this issue with my LT260K. I too had shut downs after 5 minutes of operation. It roughly followed a replacement of the bulb. I repaired stereos in the 70's and 80's, so I was not going to let the projector get the best of me without a tear down. I cleaned the fan blades, checked their operation. I checked the continuity of the thermostat on top of the bulb bracket, but found no apparent failures. I did find a possible loose connector in the middle of the projector as it seemed loose as I was disassembling the unit (see 1st picture). Then I checked for cracked or burned areas on the PCB's. During this I scanned as much of the solder joints as I could. In the 'old' days, the power supply area could get hot and make cold solder joints. I found what appeared to be heat damaged solder joints on the auxiliary power board (Lamp power). This is the one that is back right of the projector opposite the power switch. It is a vertical board that solders into the horizontal bulb power board. I resoldered these and I am up and running. USE CAUTION, I would leave this to a trained professional to repair. This requires major disassembly.
Posted on Jul 16, 2009
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Posted on Jan 02, 2017
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