I purchased a used RCA P60920BL 60 in. Rear Projection Television. Got it home and it worked for 3 days and then the screen went black and it started making a chirping sound.
I did a bit of research online and came to the conclusion it was probably the flyback transformer. Ordered one, took the old one out and installed the new one and still have the same issue.
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Re: Black screen and chirping sound
Typically, the driver circuit is affected when the flyback transformer "dies". The most common device that fails with it is the deflection transistor/driver and associated components. Hope this helps...accordianman
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Just visit this link It has details about convergence procedure to rear projection television. Convergence adjustment procedure to most brands PTVs will be similar. Pull up older posts there, by its left side bar. http://electronicshelponline.blogspot.com/
Chirping is almost always caused by the HOT transistor and Flyback transformer. You can get the Flyback with HOT repair kit for your model from www.tvrepairworld.com they are listed under the RCA Repair kits.
If you haven't used the autoconvegence option in the menu screen try that. If not clean the projection lenses inside the TV with qtips and alchohol with the tv on so you can see if the lenses are clean.
This is usually the flyback transformer (IHVT-integrated high voltage transformer) and the HOT( horizontal output transistor) The transistor will read shorted, with a multimeter, if it is bad. It is mounted to a heatsink straight back from the flyback. It may have a metal clip that holds it tight to the heatsink.
It is a pretty easy fix if you can solder.
While you have the board out, check for any discolored resistors and replace those as they will likely fail before long and cause more problems. Also check with a bright light and a magnifier for cracked solder joints and resolder any that you find.
This is a chassis PTK195 and acommon fault with these sets, that causes the symptom you describe, is the flyback transformer goes bad.
If you're at all familiar with electronic repair you could start checking there (and horizontal output transistor shorts). If not have an RCA approved warrany repairer give you an estimate/service call.
Note: the good thing about these sets is the chassis is very common and easily removed for service (without bringing in the whole set.) .
Usual cost to repair flyback/ dead set symptoms $200-$350.
Right in front of the flyback, on a metal heatsink, you will see a transistor. This is the Horizontal out transistor ans is probably shorted. Look at number on the front of the transistor for ordering. It will be 2SC5148, 2SD1878, or something like that.
Make sure the unit is unplugged while working on it