Question about Philips Magnavox 51MP392H Rear Projection Television

7 Answers

Philips Magnavox 51MP392H convergence....

I have a magnavox 51MP392H rear projection television that I bought 4 years ago. And one day turned it on and the picture in curved at top and bottom, with ghosting. From what I have been able to find on the net and forums such as this I know it is the convergence chips. I plan on it fixing myself, I have some experience in electronics and at $300 to $400 to get it fixed, I'll do it.... So I know I need to order the 2 chips (STK392-120 Sanyo Ics) and replace R3159 and R3160 (6.8 ohm 1w) resistors. But I have also read that I may need to enter the service mode menu to make adjustment to the set. My question is then, how do I enter the service mode? I have searched the net and cannot find that little tidbit of info... Thankyou all for your help in getting me this far...

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  • Anonymous Jan 08, 2008

    The picture is pushed up at the top and bottom center. The colors are fuzzy too. When I do a manual convergence to fix the colors the four corners are misaligned, I correct that but it just misalignes again.

  • don104 Apr 14, 2008

    I also have exactly the same 51MP392H model and similar convergence problem. However, I cannot find the 2 x STK392 ICs referred to here but TDA6120Q chips instead. Are these same/compatible chips? Thanks.

  • edges77 Apr 16, 2008

    I have a simular problem with the red convergence. Where are the convergence chips and the resistors located?

  • sissy2222 Apr 21, 2008

    Intellisense on remote will not correct the convergence. I press the button and it apppears to be working and then it is the same problem...curved and shadows of white, blue and yellow.

  • kc0ace Apr 27, 2008

    Ok sorry its been awhile but I did replace the chips, got them for $30.00 or so for both. Kinda looked at the resistors, but did not change them out. And the set works great. Also did a good cleaning since I had it open. Didnt even have to mess with the convergance settings. So thanks to all on the net where I got the info.

  • leeper Oct 01, 2008

    where to get the chips though

  • Anonymous Oct 09, 2008

    Yep same problem here....where can i fin the chips??

  • cmustman Oct 23, 2008

    i have the same problem with it being blurred on top and bottom and also a ghostly look from the screen need help to fix it myself to save hundreds of dollars

  • Donald Flynn Nov 10, 2008

    have the same problem, ordering the chips today. will heatsink compound like the kind used on computer heat sinks work? and has anybody had to replace the resstors?

  • MITCHELL WOJTASINSKI Dec 13, 2008

    i have the same problem and the exact same tv i had the repair guy over .75 bucks he said he could fix it for 550.00 bucks outch

    he showed me the unit it is welded to the circut board can i do this my self ?

  • kc0ace Feb 09, 2009

    ok its been awhile now and the TV is still looking good...Some have asked where I got the chips. I got them from www.acme-sales.net.. they are NOT the cheap ones these are the OEM chips. I thought about stepping up to the next chip number but wasnt sure, so I stayed wiht the 120's. Changing the chips took very little time... Pull the heatsink, unsolder the 18 or so pins (i used desoldering braid), solder in the new ones, clean up the heatsink and apply new heatsink compound, reinstall the headsink, look at the resistors to see if any are burnd and/or test with meter... and you should be good to go.

  • Edward
    Edward May 11, 2010



    You can get a complete convergence repair kit from www.TvRepairKits.com

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I had the same problem where all of a sudden it started bowing on top and bottom and the colors were bad. I read on here and other sites about the 2 convergance chips so I figured why not try as the tv was going to get thrown away because I could not find anyone that would touch it. Well I ordered 2 stk392-120's (I know others are saying use the 150's or 180's but I just wanted to put the same ones that were in there) I ordered them from electronix.com for 9.99 each plus 6.60 for shipping they took 3 days to get here and I installed them tonight and it worked great. The whole thing took only about 2 hours from start to finish. Here's a couple of tips....the chips are on the far left when looking at the tv from the back, make sure you mark with a marker where the wires go that you have to unplug as there are about 10 of them, each chip has 19 pins that you will have to soder make sure you have a soder ****** to get all the old soder up as you are heating them up, after you are done puting it back together leave the back cover off and turn it on, then go into your menu and go to pictureand go to manual converge and go to undo multpoint and restore factory as this will reset it all. Then if your color is still a little off as mine was there are 6 knobs in the back of the tv by the chips you were working on, find a channel with a lot of colors and try adjusting the top 3 a little at a time till you get the right color that you like. This should do it. It took 26 bucks and 2 hours for me to fix a tv I was ready to replace, thank god for the internet to be able to look stuff like this up. Good luck!

Posted on May 09, 2008

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The STK392-120 replacement in my TV worked! I bought my replacement chips from http://electronix.com/ for $10 each. I'm hoping the chips won't burn out again. I believe the problem was caused because I built the TV into a wall without ventilation. Thank you kc0ace for this solution.

Posted on Apr 26, 2008

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Here is a link for the service manual, it should help.
http://www.mediafire.com/?ad1mtycjei3

Posted on Jan 08, 2008

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Well got the chips and installed them. didnt buy the cheap ones though. also bought the resistors because when i checked all of them there were two that were bad, just a note when ordering the resistors some companies have a minimum order of 10 dollars the resistors are about 1.99 each so i ordered 8 to meet the minimum. desoldering was a breeze with a little solder wick. took longer to find the parts than to install them. tv works like new. saved 350 dollars.

Posted on Nov 24, 2008

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Hmmm, I'm wondering if this is a problem with a friends set? they are having Reds that come out as Orange and Green as Blue...ect... could this be color convergence?

Also I looked up those chips SKT392-120 I found them for $6.99 each at http://www.suburban-elect.com/display/STK392-120/STK392-120
I'm no techie so I was wondering if these were the same thing. I also lookin into that service manual there seems to be a lot of service adjustments to try. I'm debating on buying the junk beast from him and playing frankinstien.

ED

Posted on Oct 31, 2008

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  • Zero-G
    Zero-G Nov 03, 2008



    OK, wanted to add my thoughts and what I learned as I read this and a few other threads.

    also my above thread, please do not buy the cheap Convergence chips I listed above, it was prior to my weeks woth of research. you get what you pay for expect to pay $12-15 per chip!



    1. The Magnavox 51MP392H will just fit in the back of a Jeep Cherokee Sport.
    http://i93.photobucket.com/albums/l67/Ed...

    2. STK392-120's can be replaced with STK392-150's I spoke with a TV repair guy 40 years experience. He said always go the next one up for convergence chips on this model so they last longer. He said he's seen a trend that these were designed to last 4 years of moderate use.

    3. He also told me something I didn't read anywhere on the web about the color Yokes transformer lens slipping. if you replace the IC's and restore the manufacturer setting and STILL have problems lining stuff up you may need to loosen the yoke clamp turn size box (do at night so you can see thru the back of screen with lights off in room.) you can move the lens around until you get the correct size color graph on the screen! then tighten. he said to tighten as much as you can without cracking screen and also possible putting some silicon glue on to keep it from slipping again...

    4. its Very hard to tell the difference from OEM and generic IC's, however the experts say OEM the ones you want have a ruff gritty exterior (not shiny flat black) they also have rounded corners not sharp angles. generics will work but may only last 5 months. usually you get what you pay for, same in convergence chips.
    below are original's pulled from my set, the connectors are bent from the extract so ignore that part.
    http://i93.photobucket.com/albums/l67/Ed...
    http://i93.photobucket.com/albums/l67/Ed...

    5. your going to need a set of star screw drivers to take apart the TV, if its difficult to remove the circuit board keep screw hunting the IC are mounded to a cooling fins on far left bottom board in TV, on that board they are back right and if your like me I was looking for something small, well they are about the size of a normal thumb.
    http://i93.photobucket.com/albums/l67/Ed...

    6. My problem TV, well my tear down and repair is only 1/2 done I'm still waiting on my chips but here is a before pic, hopefully yours looks like this and you can fix it... wish me luck!
    http://i93.photobucket.com/albums/l67/Ed...

    Zero-G

  • Zero-G
    Zero-G Nov 03, 2008

    Wish this board had an edit so I could fix all my above links and Pictures!!! they all seem to use differen coding these days!

  • Zero-G
    Zero-G Nov 04, 2008

    Philip Magnavox 51MP392H

    SSB convergence circuit board # 3135-013-3263.5 <---email me if you have this board !!!!!



    Well, I added the IC's last night and 4 of the resistors blew, had to tear it all out again and getting the resistors now...



    after about 6 hours of research I'm able to ask this question since I didnt even know how to ask it...

    on the SSB circuit board there are tiny "Surface mounted" black I believe resistors? they are tiny with tiny white lettering mostly [332] I fear one of these may have died, there is some slight discoloration around it like it burned up.



    1. where can I get a surface mount 332 (3.3? somthing) resistor?

    2. will my 17 watt soder pencil kill it ?

    3. am I correct in the above?



    if so somthing the size of a fleck of dust is killing my Tv????



    Zero

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Thanks so much. I bought the parts today, two stk392-120's. I will embark on the task when they get here. I am not a technical person, so wish me luck. Can anyone clue me in on how I am supposed to ground myself? I saw references to this and want to make sure I dont hurt anything else in the process. Also is there any specific type of solder I need to purchase. Thanks again.

Posted on Oct 30, 2008

The two resistors are not the only ones you need to change. there are 10 more to change eventually.just check them with an Ohmmeter. they should check at or around 3.4 Ohms.In general you don't need to go into servicemenu, although the code is only for technicians. do just the customer convergence and you should be good to go.Make sure, when installing the Chips you use heatsink compound to get a thermal connection to the heatsink.otherwise they (the IC's) will die on you in a heartbeat.Also make sure you get original Sanyo IC's not those conterfeit's that are everywhere offered.

Posted on Dec 26, 2007

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