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Forum index » Electronix » Repair
56" RCA rear projection (FLYBACK related problem)
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haitham
electronics forum beginner


Joined: 15 Jan 2007
Posts: 3

PostPosted: Mon Jan 15, 2007 8:40 pm    Post subject: 56" RCA rear projection (FLYBACK related problem) Reply with quote

Hello!

I just replaced the FLYBACK transformer on my 56' RCA rear projection TV model P52921 (Flyback part # 239111, Chassis CTC195M). The HOT was not replaced and I believe the new FLYBACK is not an original part. Anyhow, after replacement the TV powered up and initially the picture looked fine. However, everytime the unit is powered up there is a noise coming from the back that lasted for 3-4 seconds then it disappears. The TV worked well with the exception of the noise and a slight blurr at the very right edge of the screen. The TV worked in that manner for about 7 days until today it did not power up as it did before replacing the FLYBACK.

Without any testing and with those two clues (the noise and picture blurr) can someone help me understand what might the problem be?

It could be anyone of these: The new FLYBACK, the HOT blew, Driver and HOT base circuit components, the LV regulator, or maybe bad soldering to the new FLYBACK.

Any good ideas?

Thanks!
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haitham
electronics forum beginner


Joined: 15 Jan 2007
Posts: 3

PostPosted: Wed Jan 17, 2007 4:21 am    Post subject: Re: 56" RCA rear projection (FLYBACK related problem) Reply with quote

I was able to narrow down the problem, just need a couple of information. I need to know both the location numbers and part numbers for those two HOTs (the horizontal output transistor and trnasformer). If you can provide me with this information I will be very thankful!
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haitham
electronics forum beginner


Joined: 15 Jan 2007
Posts: 3

PostPosted: Thu Jan 18, 2007 12:34 am    Post subject: Re: 56" RCA rear projection (FLYBACK related problem) Reply with quote

Hello, Anybody lives here? Smile
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