Question about Philips Magnavox 51MP392H Rear Projection Television

1 Answer

Blue Color Convergence wont adjust

I saw your answer to the guy who asked about fixing his tv himself, and was wondering if I could do the same. My Magnavox 51MP392H/17 will not allow me to adjust the blue convergence up or down, only left and right. It appears to be about one inch low on the manual convergence screen. Is this something I can tackle myself?
Thanks,
Mike C
Dunedin, FL

Posted by on

  • Zero-G
    Zero-G Nov 20, 2008

    I have the same problem and replaced both IC's with better 150's and replaced all the 12 metal film resistors with 6.8 ohm parts. I did this 3 times now and still cant get the BLUE to move up and down, are there any other parts that control BLUE up/down other then the IC STK392-120's and the 12 (6.8 ohm) resistors? what do those transistors control?



    I posted my detailed problem else where but wrong spot on this site I'm going to repost it in this message thanks for reading...



    OK, I got a good one for you techies...

    so I replaced the ICconvergence chips and my 12 resistors, theapparently my 6.8 ohmresistors were not the right type "not metalfilm?" or my solder job wasnot up to par, either way 2 burned up. Ireplace then and the ICs withall new chip this time the quality ones.the TV run stable the redadjusts fine

    HOWEVER,

    1. The Blue convergence with not move up and down just left & right. I've tripled checked the sodder even redone them and checked the ohms they are good... red works perfect, green is bent on top

    What else controls the the "Blue convergence up and down?"
    I read the parts manual online but can't decide if those 3 prong Transistors effect the convergence control and if so which one?

    2. the Green "non movable fixed color" has a warp/bend top center TV screen the top two center mulit point convergence points warp left. see below crued sketch, also most of the center multi points red/blue are right on BUT the outer ring red/blue + are pulled IN away from green
    IGNORE THE DOTS, I needed them to hold the space to keep the lines from moving to the edg of screen in drawing for the GREEN screen bend which remains constant after all 3 IC replacements attempts

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  • Philips Master
  • 8,617 Answers

Yes by all means . I will post a link where you can get your replacement ICs along with free installation instructions with pictures. They also provide free on-line instant messaging while your doing the repair which only takes about an hour from start to finish. I am one of the support techs. Your model uses STK392-110 or STK392-120 either IC interchanges with each other except the 120 is a better IC runs cooler.Heres the link.You will need to replace both ICs
http://servicemanuals.vstore.ca/

Posted on Apr 07, 2008

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