Question about Mitsubishi VS-45607 45" Rear Projection Television

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Mitsubishi VS 4552A

Mitsubishi VS-4552A Build Date Sept. 1994 There is a wide blue V in the middle of the screen top to bottom and blue-ghosted images during normal viewing. bring up the convergence adjustment screen, red & blue vertical adjusts fine, red horizontal fine, blue short and bowed, looks like a blue smile & the word blue bowed and fuzzy. That is it, otherwise my VS4552A mitsubishi build date Sept. 1994 Performs fine.

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  • Danny Locke
    Danny Locke Jul 31, 2007

    Part of your answer you said:
    One of your convergence IC's has either cracked loose or burned out.
    Is this convergence IC on the convergence board?
    I removed the convergence board, checked it closely with a magnifying glass looking for a cracked soldier joint or just a dull soldier joint. Found neither one. The local repair tech wants $60.00 for a house call and diagnosis, I do not have a problem with that, but he said if it?s the convergence board it could cost as much as $400.00 to repair, that price makes me pucker especially when I read repairs costing much less. I tossed $750.00 at this Mit. 4 years a go having the power board? Repaired do not know if I can afford this tech. Would buying a used convergence board and installing it myself be a plan? Are there any adjustments to be made other than the test button and adjusting the convergence once the convergence board is replaced?
    Thank You for your response, Sconce

  • Danny Locke
    Danny Locke Aug 17, 2007

    Turns out my Mitsu. Has two convergence IC?s. One of our customers has an Electronics repair shop and he sold them to me at cost! I?ll be putting them in this weekend and will report the out come. This repair tech also said if these two IC?s didn?t totally fix my Mitsu. Not to panic. He said some times there are some resistors that will blow depending on the nature of the failure of the IC, he said they were designed to blow in order to save other parts. So I?m primed and ready to tackle this repair and I?m prepared for success and failure, short-term failure. Sconce

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One of your convergence IC's has either cracked loose or burned out. The IC will have to be resoldered or replaced and then the convergence circuits realigned. If you do not have experience in repairing convergence circuits then have a qualified tech handle it for you. This is by far the most common failure in the projection sets and a good tech can have it fixed in about an hour and a half. I charge $150 for that but shops in your area will vary, so call around.

Posted on Jul 31, 2007

  • Mike Longo
    Mike Longo Aug 03, 2007

    Yes, the convergence IC's are the large black chips mounted on a large heat sink. The convergence IC's will have something like STK392-110 printed on them, although some sets have a metal bar across the front which blocks the numbers. The older projection sets had 3 smaller IC's, then they went to 2 larger IC's, and the newest ones sometimes have only one huge IC. It never makes sense to replace the entire convergence board, since it is only the IC that went bad. Ifg you do change the whole board then the set will probably have to be completely realigned from scratch, but if you change the bad IC then it will work fine. Look for those IC's, let me know what numbers are on them and sometimes they are even labeled with the colors they control.

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