Question about Mitsubishi WS-55513 55" Rear Projection HDTV

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Rechecked the conections and still

Hi..rechecked everything and no bad connections, etc.. so I have since pulled the entire circuit board assy from the TV chassis and am going to try and troubleshoot from component level. Seems like a short somewhere but not too familiar with this model. I have a service PDF of the model, any suggestions where to start?

Thank you in advance!
-Richard (MetalDad)00000000000000

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Well..that's interesting...before you begin, have you determined a source for replacement components? I'd be hesitant to do all that work, NOT knowing if there are readily available form fit function components for it. Don't assume that overseas manufactured appliances have a ready distribution system for spare parts.

Posted on Mar 19, 2008

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I have fixed a lot of these sets.

The most common thing that happens is the set develops what we call cold or bad solder connections.

The circuit boards were not ever soldered by hand but by machine--everything soldered in one motion.

I have seen a large number of these where once the chassis (frame with the circuit boards) is pulled loose and tilted so bottom of all three boards face the rear of the set it is usually a 15 minute job to locate and re-solder cracked connections.

The most common area is the power supply board but almost ALL the bad connections are easy to see with your eyes.

If you cannot or do not know someone capable of this it may not be worth a shop repair---very good set but many major parts are NO LONGER available.

Soldering should cure the problem and I can if you have some skill (or someone you know does) point you exactly where and what to look for.

The reason for the bad connections is simple: the boards heat up and expand and when they cool they contract and the heat from some parts causes connections to literally crack loose.

Let me know if I can assist you in any way, I am here to help you.

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Most projections have a removable speaker cover on the front under the screen. Then there is an access panel that you remove the CRT sockets are the circuit boards attached to the CRTs

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