Question about Panasonic PT-51HX40 51" Rear Projection Television

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Changes Channels after Repair Tech changed C555, C556

My father in law recently had his tv go out on him... I was busy with school and was unable to look at it for him so he called Sharper Image to come out and take a look at the Set.. They concluded that C555 and C556 were bad and ordered the parts and replaced them for him... Shortly after the Tech left there was Chk code in the upper left screen... 1 phone call later they were able to enter the Set into self check and the code went away... It has ever since changed channels randomly... It is very annoying... The same tech came out and Checked the set again and said that he unhooked the front panel and to let him know if it worked... Well It didnt... Said Sorry panasonic doesnt make the part to fix it your SOL and referred to buy a new TV...

After reading on here I noticed that Q553 has usually been replaced with C555 and C556. Could this transistor be causing this issue? I am not afraid of soldering in any way shape or form... I am IPC 7711/7721 certified so I can handle anything... Would really like to get this fixed for him as ShaperImage has already drained him a few Hundred $$$ and he has yet to have a fully functional TV back...

Thanks in advance,

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Re: Changes Channels after Repair Tech changed C555, C556

I have the schematics, if you want it, write me to, only I need the model of the board.

Posted on Aug 23, 2008

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No picture

panasonic part number for Q553,c555 and c556

Q553- 2SK2847LBMAT $9.49
C555- ECKD3D122JB $0.90
C556- ECKD3D821JB $0.90

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