Question about NEC MultiSync MT1050 Multimedia Projector

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Nec mt/1040 Hello, I just found you all. I am having a problem w\ nec mt10/40 projector. lamp lights do not hear a fan. the lamp goes out. I downloaded a copy of the service manual w\ schematics but would like any insights that you have regarding if it is not the fan itself. niether the intake or exhaust fan seem to come on. Could it be in the power supply for the fans.I can be reaCHED AT RODNEY.R.BROWN@THOMSON .COMThanks forr your help Rod

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Re: nec mt/1040

If your comfortable w/surface mount troubleshooting and soldering, download the service manual from elsewhere online. Part of the troubleshooting tree for this type of problem is to check the surface mount fuses on the underside on the Main PWB (schematic page 1/8). On mine, the 12V surface mount fuse, F3004 (2.3A) was open (quadrant C1 on the schematic). Replaced it, reassembled the projector (3 interlocks don't 'cha know) and it came up just fine.


Posted on Dec 10, 2007

Re: nec mt/1040

If you have the schematics look on the power supply board circuit. It looks like there is a linear regulator that feeds the fans. My guess is that the regulator is bad or there are broken solder joints in that circuit.


Posted on Nov 29, 2007

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