Question about Philips 55PP9401 55" Rear Projection Television
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Posted on Jan 02, 2017
They should be STK392-120 but check the numbers on yours to be positive. They are located on the extreme left of the chassis looking inside the back panel mounted on a heat sink. They will have STK Numbers stamped on them. Yes you should change both of them they cost 10.00 each at electronix.com You will need heat sink compound as well but this is better purchased at Radio Shack 2.00 per tube. Put a good coat of Heat sink compound on the back side of the new ICs. Also check over the resistors on the board next to the ICs sometimes 1 or 2 of those burn when the Cs go out. Let me know if you need anything further
Posted on Jan 25, 2008
Convergence problems! If the mechanical set-up and electronic adjusts aren't cutting it, you may very well have to replace one or more devices on the red conv board, including but not limited to, the conv IC....accordianman
Posted on Feb 25, 2008
Go into the customer menu with the remote and look for "convergence" if the red or blue will not adjust in some direction you have a bad convergence chip. This set uses 2 STK-392-120 chips---both need to be replaced along with any of the 6.8 ohm resistors around them that are bad--a bad resistor will be discolored or white in the middle.
With the back cover off the chips are located on two metal heat sinks on the large board on the left side (as you look from the back) and both will have the STK-392-120 number printed on them in white--the chips are black in color.
Most of the time you just need to replace both chips and adjust the set with the remote control. You can buy both chips for about 13 dollars on Ebay--if you can do this repair yourself you will save a lot of money!
Most shops charge 300-400 for this kind of repair---I do lots of them here for 200-250 including parts, labor and house call. Now is the slow time of year for TV repair shops--shop around--if they say "it has to go to shop" keep looking; any good tech can do this repair in your home and it usually takes about an hour.
I do not know how much skill you have but if you need instructions I will help you. This problem happens for a simple reason--the chips are about 2 inches wide and 1 1/2 inches tall with 18 pins each--the back of each is metal and a white grease is applied to each to transfer heat quickly to the metal that they are bolted to. After some years the grease dries out from the heat and one of the chips cannot move the heat fast enough and it fails.
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Posted on Sep 04, 2009
SOURCE: Our phillips 60" TV
Ur convergence is dead.Know how to solders?Must changed the 2 convergence ICS,and all it resistors.Tries Tv repair World.com,Tvrepairkits.com for the convergencce kit.The shop will cost $300 for parts and labors.
Posted on Feb 01, 2010
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