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56' RCA Rear projection TV (FLYBACK related problem)

 
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Haitham



Joined: 15 Jan 2007
Posts: 3

PostPosted: Mon Jan 15, 2007 4:45 am    Post subject: 56' RCA Rear projection TV (FLYBACK related problem) Reply with quote

Hello!!

I just replaced the FLYBACK transformer (part # 239111) on my 56' RCA rear projection TV model P52921. I believe the new FLYBACK is not original. 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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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Mon Jan 15, 2007 5:10 am    Post subject: Reply with quote

What's the chassis #? CTC or ATC or PTK ???
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Haitham



Joined: 15 Jan 2007
Posts: 3

PostPosted: Mon Jan 15, 2007 3:42 pm    Post subject: Reply with quote

minnie wrote:
What's the chassis #? CTC or ATC or PTK ???


It is CTC195M
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PostPosted: Wed Jan 17, 2007 3:51 am    Post subject: Reply with quote

I think I am close to finding a solution...just need the location on board and part number to the HOT and Horizontal drive transformer ....

Thanks in advance!
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Wed Jan 17, 2007 8:24 pm    Post subject: Reply with quote

H out should be q14401. P/N 237470. Also check r14125 . I doubt hor. drive xistor is bad.
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minnie



Joined: 18 Aug 2005
Posts: 2877
Location: Hell

PostPosted: Wed Jan 17, 2007 8:27 pm    Post subject: Reply with quote

Sorry transformer.
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Haitham



Joined: 15 Jan 2007
Posts: 3

PostPosted: Wed Jan 17, 2007 9:30 pm    Post subject: Reply with quote

That is impressive you found the part number. How did you obtian it? Is there some sort of database online?
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