Question about Philips 50P8341 50" Rear Projection Television

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Philips 50p8341 hi my problem is this first there was a dead set, I replaced fly back and powered it up and heard the it come on and the crt's fire up but had no picture or sound, but I did notice the crts were very dim sow I turned up the power to them on the focus block and they lit up. Now there is a rainbow curved lines with no sound and the remote has no control or the menu button. sow I replaced the convergence ic both of them and ic 7612 it was bad on ssm board, also changed the ic7550 and the power reg next to it. replaced ic 7402 audio out. I checked all diodes. on all the boards nothing bad. but resistor r3306 was not looking good i removed it and it was good. I was looking for r3307a but had no luck finding it. I though It could be the ssb board but I have to tv same model and switch the the new one id nothing to change this. any help you could give would be nice Dave

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Time for some old fashioned trouble shooting. first divide the issues... the remote not working could possibly be a connection issue.
second you can do a soft reset ... unplug the tv for about four hours.

third is to check for cold solder joints. that requires first smacking the tv (yep pretty old fashioned test). if anything changes you need to localize where the problem is.

You need to be EXTREMELY CAREFUL for this next part. power on the tv and tap components on the circuit board gently with a non conducting item. even a hollow pen would do... or something plastic.

Be aware that you are dealing with electricity so be very careful with that.

any changes on the screen as you tap components indicate most likely bad solder joints... after you have unplugged the set resolder those components.

also inspect by feel the capacitors on the circuit board .... feel for rounded tops. any you find need replacement... not the values of the component as well as the orientation of them.

I will stress again... when you are testing for bad solder joints be aware that it is electricity you are dealing with and it has the potential to kill you.

Robert

Posted on Sep 09, 2008

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Well you need to have service manual which will guide to trouble shoot step by step , and it contains details part number for parts you get one from this link:

http://servicemanuals.vstore.ca/


Good luck.....

Posted on Sep 09, 2008

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