Question about Samsung HCM4215W 42" Rear Projection Television

1 Answer

Distored red picture

The red picture is distored like a pincushion on up left conner. The green and blue look ok so far. Auto adjust do not work. Tried to adjust convergence manually (I bought a service manual). Is it the ICs on convergence amp and how do I know? They are two stk392-010. where do I get them and what is the proper process to replace them?

Posted by George Sun on

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Mohamad Abdan

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Sometimes a nearby speaker or cassette recorder or an old telephone may affect it, because of its magnetism power ,take away any nearby stuff and try manual reconvergence after a short power off for a reset ,

Posted on Apr 30, 2007

  • Mohamad Abdan
    Mohamad Abdan May 07, 2007

    hi ,
    you rated my help as a poor also i was here to help ,
    it is quiet clear that you have a bad convergenz due to magnetic field effect ,
    the stk's are not the fault don't even try to resolder , that kind of ic loose its function for extra heat
    please try to change your rate it is my only poor rate got byyou!!
    regards
    regards

  • Mohamad Abdan
    Mohamad Abdan May 09, 2007

    thanx sir for reactiong about the bad solution strick
    regards

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http://servicemanuals.vstore.ca/
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I seem to have found the solution (and the cause, perhaps?) for this problem!

I was having the EXACT same problem with a monitor I'm repairing for a friend. The capacitors on the power supply board were blown (CapXon capacitors, who'd've guessed), which was keeping it from powering up. After replacing the capacitors, the screen worked beautifully. But it had this weird yellow tint!

The strange part was that pure colors - red, green, blue - all appeared perfectly OK on screen. Curiously, the menus would show in the proper colors, except for one: the manual color adjustment menu, which illustrated "Blue" as a sort of off-green in the icon. Auto-Adjust would always fix the colors for a split second, then go back to yellow. Reset didn't fix it. Color reset didn't either. So, exactly the same problem as above.

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