Question about Mitsubishi WS-55859 55" Rear Projection Television
I am in need of some technical advice. My Mitsubishi WS-55859 shutdown a week ago. My wife said that for 20 minutes before it shutdown, it appeared to have a tracking problem like from an old VCR. She went on to say that it only seemed to affect the bottom of the screen and jumped at times and then cleaned up and repeated that cycle several times before shutting down. Before this, the TV seemed fine. The only thing I perceived was a very slight downward bow on the lower right hand corner of the screen. This was barely noticeable on a channel with a ticker stripe along the bottom.
If you try to power up the power LED illuminates for a couple of seconds, relay engaging sound is heard and then it shuts itself down.
I have read several internet posts that have helped me immensely. I did the self diagnostic check and got the 2-2 message for short protect. I was also able to verify that there is no continuity across either of the 5 amp pico fuses (F9A04 and F9A05). Obviously, these fuses failed for a reason. Based on some of the postings that I have seen, is it fair to assume that the convergence IC’s are bad? Is there some way to test them or would you just replace both IC’s and both fuses and fire it up? or are there other components that are likely suspect?
Thanks in advance for your willingness to share information. I appreciate your posts.
I would definitely replace both of the ICs and fusible links.
Remember to use heat sink compound for the STKs (found at any electronic parts store including Radio Shack).
Once parts are installed minor alignment on the convergence would be in order.
Any Questions may be directed to this post and I will respond.
Posted on Jan 13, 2008
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Posted on Jan 02, 2017
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