20 Most Recent Mitsubishi WS-55809 55" Rear Projection Television Questions & Answers


Check the EHT splitter assembly, this feeds the focus grids on the output tubes.
BE CAREFUL as there is more than 25kVolts there!

Mitsubishi... | Answered on Apr 23, 2017


That is an easy fix. There are bad solder joints in the convergence unit and line stage. For an experienced engineer, about 20minutes will find them all.

Mitsubishi... | Answered on Apr 20, 2017


I repaired one these. The convergence board is bad. You will have to change the two STK Ics. These will have, I believe thirteen pins, mounted on large heat sinks.. And that is not the only problem. You will need to resolder this board as there are as many as 15 bad grounds. This board is very thin and you need to exercise care pulling it out,desolder, install and solder in the new ICs. Once again this board is very fragile. Another name for this board, is the signal board, look for all the RCA jacks and RF connections on it. Thanks for asking

Mitsubishi... | Answered on May 25, 2014


If you haven't recently changed to demo mode, or some how activated the sleep feature, then I would say that either the power switch or power supply have gone south on you. I would wager that the power supply has a bad capacitor in it some where. if you are pretty tech savy you can take it apart and see for yourself as the bad capacitors are usually swelled up. also there is usually more then one. but not more then three.

Mitsubishi... | Answered on Apr 26, 2014


Can't get a reception with my ws-a55 tv

Mitsubishi... | Answered on Feb 27, 2014


a COUPLE of things occur to me--Some of these sets had a problem with coolant leaking from one of the picture tubes--there is a sealed unit for each tube with Glycol--clear liquid like anti freeze but much more concentrated and TOXIC!

You may want to remove the front speaker grill and inspection plate behind it and look carefully across the front of the three main boards--it will appear as a discoloration of any parts on the boards-it does not take a lot to do fatal damage to the board--if you see any actual liquid on the board--do not touch it--you have to look mostly at the first few inches from the front of the boards--if you do not find any Glycol signs I have only one other suggestion:

All these sets have a hard reset that will put the set back to the condition it was when new and in the box---any labels on inputs will be removed and the set will turn off and then come back on channel 3 in the air band---you would have to put it into the cable band and autoprogram the channels again----


Take your time and look for any discoloration of parts on the boards---if glycol---solder connections will not shine but be discolored. (may look a little like battery cable in a car that has corrosion)

Let me know what you find and if you want to try the reset let me know and I will tell you how to do it for this model.


Mitsubishi... | Answered on Feb 27, 2014

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