Question about Pioneer SD-P50A5-K 50" Rear Projection Television

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Convergence ic's How difficult is it to change them in a Pioneer SD-P50A5-K

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  • CB gurow Dec 14, 2007

    Hi jeff which heat sink (were) on the board i can solder (cb fixer) never a tv.need to know were to bleed voltage off.(fear) just in case, also a site to get them from and how many IC"s i've been reading some say 1 orther's say two??.but my problem is similar, the Blue stays still,only the yellow moves some what Red is impossible. is it possible to remove the top back section also without hindering the mirror. all advise would be appreciated. Bob



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Difficult.. if you have no solder experence ...dont try it.. depending on your exp..ok.. as a tech thats a everyday thing.. they are two big black ic mounted on big heat sinks...with a bout 20 pins that can be difficult to get lined up. When you replaced them however ..there is a few other things to check. fuses. and output resistors. just getting the boards out can be difficult.

Posted on Dec 10, 2007


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It has color at the bottom of the screen almost halfway up. I need to know how much to fix.

Tv have colors lines R,G,B mis alignments,have colors shadows or 3D pictures?Yes?Mean ur tv have a dead convergence board to causes this problems known as a tv convergence picture problems.The tv convergence board must have to be fixed like replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The tvs shops will cost u like $300-350 for parts and labors.

Aug 06, 2011 | Pioneer SD-P50A5-K 50" Rear Projection...

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Tv turns on but the screen is black. Before it went black we were haveing bands of color on the top and bottom and everthing was kind of like in three D they were all three colors and like 3 of them there.

Ur tv have convergence problems,now the 2 STK convergence ICS are completely dead,U lucky u tell it was 3D screen,before it go completely dead,went black screen.Or ur problems it will very hard to diagnose.U now how to do soldering?Must replaced 2 STK convergence ICS,some or all it resistors.Tries Websites Tv repair, to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

Apr 03, 2010 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Power cuts off Pioneer SD-P50A5-K about 9 years old

Probably started as a bad solder connection but if it's blowing fuse FU106 now, you're probably in for a new set as that usually means your convergence IC's are bad along with a pair of darlington transistors that's mounted to the heatsink nearby. With the age of the set it may not be worth the trouble. If no fuses are blowing, you could still have a bad solder connection near the Switched Mode Power supply transformer. If that isn't it, you could have a bad High Voltage Block and you may end up having to replace the deflection board as well thank you Pioneer.

Feb 02, 2008 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Need to help accessing convergence IC's on Pioneer SD-P5191-k

these sites should show you good examples

Jan 09, 2008 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer


convegence amp ic are bad

Nov 13, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Pioneer P50A5-K goes to stand by mode

1) Pull chassis---remove power/convergence PCB==the one

with the large heatsink on it.

2) Remove solder from pins of four regulators on heatsink.

3)Clean board/pins w/ toothbrush & alcohol.

4)Re-solder, also solder both Stk's for prevent.


Oct 10, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

SD-P50A5-K convergence board replace STK392-110

Unplug chassis from front and back,remove chassis from back.Replace Ic's w/OEM or better quality only.Be sure to remove solder from all four reg. pins and clean/resolder.Replace 4amp fuse in power supply.

Sep 16, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

2 Answers

Right side convergence

A convergence IC has burned out. If I remember correctly, those Pioneer sets have one huge convergence IC, but that IC only has 5 channels in it so they use another smaller dual STK IC and one half of it is used for the 6th channel and the other half is the vertical output. Look on the convergence board, find the blue convergence jack, identify the blue horizontal channel, follow the traces and replace the IC handling the blue horizontal channel.

Aug 28, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

2 Answers

TV shuts off seconds after being turned on

This is actually a common problem with this unit and one that Pioneer is aware of... Over time the feed resistors in the convergence circuit change in value and the convergence ICs begin to fail, placing more of a load on the power supply than necessary and stressing components in the SMPS. The fix; Pioneer recommends upgrading the convergence IC's from STK392-110 to STK392-180, change all resistors in the convergence circuit that have changed in value and replace the power supply to repair the unit.

Jun 27, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

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