Question about Panasonic PT-53WX42 53" Rear Projection Television
Ok, so I did some investigation after I flipped the power on my 6 year old
panasonic pt47wx49 projection TV and it went off multiple times, after continuosly trying to make it stay on, finally its on! but now the green color is bowed on both sides, I have tried service mode, and know its got to be the conversion ic's.
The middle picture is fine if you flip to 4:3 the bowing is hardly noticable, but I don't want to watch my TV in that mode plus I know its not recommended for this set.
So I did some investiagation and found that the conversion IC (located on the heat sinks) go bad after 6 years? Panasonic and the dealer both failed to tell me this at time of purchase which is another story!!!
Thx to fixya.com I was able to pick some up some new ICs and I am going to attempt to replace them...
I am some what skilled with Jamma and done minor replacement soldering. Upon opening the TV set I noticed some white clips (tracers) connect board A to the power board..I am unfamiler with these power clips? Anybody know if I can just take out Board A to replace the IC or do I have to remove the whole chassis? I dont know how the disconnect the white tracers that go to the power board, I download the service manual (once again thx fixya!) and it show the dude taking the whole TV apart, I think thats a little much...and I dont want to start pulling tube plugs!
Please help! Anybody give me a walk through? Also I want to get a new solder iron so i don't damaged the board, will the cold shot work well??
Please any insight...I dont care if I bust it, in my eyes its already garbage.
You have a problem with the STK convergence modules. They're on the
center circuit board attached to an aluminum heat sink that's about 8"
long and 6" tall. You may be able to recreate the problem (hour glass
effect) by gently moving the heat sink (which the modules are connected
to). This gives the hour glass effect on the picture and the advanced
convergence screen. This is an indication that the modules pins aren't
solidly connected (meaning soldered) properly. Remove the circuit board
(not sure what you mean by white clips, but you should be able to
take out just the convergence board) and clean the old solder off
& resolder the modules pins to the circuit board reconnected the
board and then retest by again pushing on the heat sink. The
"factory" job was good enough for 3-4 years but the heat (and these
modules do create a lot of heat) and stress created from repeated use
eventually takes it's toll, weakens the pin connections and our problem
occurs. take the appropriate cautions working around the high voltage
of the set & use a non-conducting piece of plastic to push the heat
sink when doing tests.
If soldering doesn't help, then the modules have died and need replacing. Don't buy the $10 cheap ones. Most of them have an upgraded version that is stronger. Also look for any burned resistors in the vicinity of the modules.
Best of luck, hope ya fix it.
Posted on Feb 25, 2008
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Posted on Jan 02, 2017
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