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Re: rca model p56812bl
I would try soldering the flyback terminals on the PC board and alsore solder around the Horizontal and verticalyoke pins as well as the transformer and line coils. Rca has ad some problems with bad solder problems on the circuit boards. let me know if I can assist you further.
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Hello matter0464 and a warm welcome to Fixya. The issue you are asking about is actually rather common with the RCA P56812BL after it gets a few years on it. The problem is most likely the high voltage circuit located on the main board. I would start there before looking elsewhere. Also inspect the 195 AP fuse on the main board as well because it is known to blow out periodically. Well I hope this was helpful and good luck to you. Thanks for using FixYa.
It seems that your Pulse Width Modulation drive ic on power supply or high voltage section fails. This can be resolve by replacing the IC MCZ3001d that will be found on your power supply or at the high voltage section.(near Fly back transformer) If you have basics knowledge in electronics and soldering, you can easily fix it.
The most common problem with these Models/ Chassis' is IHVT (intergrated high voltage transformer) going bad. They have around 99% failure rate. T14401 > part number > 239111 >IHVT.
Try to get RCA part a little more pricey but more reliable then after market ones. You can tell if it's bad by the crust on the top of IHVT.
Good Luck, big IRISH.
The fault you are describing is caused by a faulty fly back transformer. The fly back transformer provides the high voltage required to light up the picture tube/s on the set. Other than the fly back transformer there are a few components that supply the fly back with power that may have failed. Generally not overly expensive to fix
hello. sound like u have a power suply trouble. that sound u hear is most like lee the fly back. leaking out high voltage. what ever u do . don't try to open the set. u could get the scok of your life around 50,000 to 150.000 volt's .!!! and it no joke.!!!
Sounds like the high voltage block,part number 205064,this part is behind the speaker grill,there is a access panel to remove,part is between the left and middle tube,has red wires from the tubes and black ground wires on the left side,hope this helps.
Rainman, can`t really be of any great help on this one, both techs can be right, the chirp is exactly as you thought, the set is trying to come on but there is a short in the set and it`s shutting down because of the short, could be convergence, low voltage power supply, high voltage power supply, until a tech gets in there and starts un-loading circuits it`s impossible to say where the short is, gonna have to call someone out for this one, good luck with it, BMW Rider
First, need to narrow down the problem. Did you perhaps change the input source? To this point, change the input source, there should be text on screen that indicates what source is selected.....do you see this? Change the volume....do you see the volume level bar on the screen?
This set normally has problems in the horizontal and high voltage circuit.
The horizontal output will short out and I often change the high voltage transformer.
The high voltage splitter is another one of the usual suspects.
Since it's ticking at plug in, then, I would look at the secondary of the high voltage transformer or the regulator circuit.
Checking the the horizontal output first for a short and if ok, checking the B+ voltage on the collector would be my next step. That should give a good thought as which direction to go.
Hope this helps.