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Palitroque bowos in top bottom and sides ; i replaced both convergence outputs and checked resistors seems like a pin cuision problem

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Re: palitroque

Picture bowing in with blue red or green offset is caused by loss
of convergence circuitry operation. If it simply offset, try to use
the convergence adjustment settings of the set. If you cannot get some of the settings for each color to move, it confirms a defect in
the circuitry. If it will move and you can line it up, there is nothing further to do.
The convergence chips need to be changed out by a tech and there may be resistors burned that need to be changed as well and sometimes there is a fuse to the convergence modules that needs replacing. Once these are changed the user convergence controls will get it closer than it was, but it may require getting into the factory provided service menu to do a more complete allignment.

Posted on Aug 20, 2009

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Re: palitroque

If you want us to help you, you must provide the make and model of your set.

Posted on Aug 29, 2007

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Convergence is bad on left side...good on right.....where convergence is good the picture is great

Re-solder convergence output ICs pins and nearby big resistors that might solve your tv picture problem and if that does not help then replace both convergence output ICs to fix the problem.
Convergence output ICs would be available in local repair parts shop or google it.

Feb 25, 2011 | Sony KP-65WV700 65" Rear Projection HDTV

1 Answer

Red vert lines will not convergenge(sides) blue and green o.k.

your convergence output amps are done...
you have to do repair on the convergence output circuit, and inspect
the power supply for any damages.

Jan 21, 2010 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

I see double pictures on top and bottom

Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail between

Oct 24, 2009 | Philips 51PW9363 51" Rear Projection...

1 Answer

Blue cast to screen and words at the bottom of screen run does not seem aligned to grid. magic focus did not correct. Can align red and green manually but not blue.

The IC /resistor in convergence circuit(blue) is bad

convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail

Oct 21, 2009 | Hitachi 51F500 51" Rear Projection...

1 Answer


What is the brand and model?

Apr 26, 2009 | Projection Televisions

1 Answer

50hx70 blue projection light is concaced at top and bottom of tv

When the convergence amplifier ICs go bad (STK392-xxx), they RARELY cause more than one color to go out. The fact that the top and bottom of the picture are effected indicates the vertical convergence IC. Replace both, and while you're in there check the bias resistors... it is likely one of these is open. Once the ICs have been replaced (as well as any open resistors), customer convergence followed up with the auto convergence should do the trick.

Nov 19, 2008 | Toshiba 50HX70 50" Rear Projection...

1 Answer

Convergence problem

did you replace the six convergence resistors with the ICs? as Hitachi recommends replacing the six resistors when the ICs are replaced as the old ICs can harm the resistors and they will need replacement.

Sep 27, 2008 | Hitachi 53FDX20B 53" Rear Projection...

2 Answers

Put new ic chips in and the problem still exsists

Many times when the convergence modules go bad, they blow some of the resistors that feed it power. Look for little small low resistance resistors right in the vicinity of the modules.
Hope Ya Fix It.

Feb 08, 2008 | Toshiba 50H72 50" Rear Projection...

1 Answer


Replace both convergence IC's part# STK392-040. Also check for burnt/discolored resistors nearby.

Aug 23, 2007 | Samsung HCL4715W 47" Rear Projection...

2 Answers

PT-51G36E Convergence Problems

did you check power supply capacitors? may be is a pincushion but check cap first... good luck

Aug 08, 2006 | Panasonic PT-51G63 51" Rear Projection...

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