jts1957
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Aug 16, 2012, 2:01 AM
Post #14 of 17
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Re: [HostileHST] RCA R52WH74 convergence question
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Initially I had a very slight bend in the screen with color separation (3D affect, but only after it would warm up), so I did the fly-back trick and checked the FL231 fuse (was and is good, even took it out once to test, just to be sure) and it corrected the problem, but then I decided to touch up the long thin board the main AC power goes to and now the screen is so far out of joint and the convergence no longer works, even though it still shows up in the menu and attempts to converge, but stops right away. Again, I've done the fly back, checked fuse/s, re-soldered 3 boards including the fly-back board, power supply board to the convergence amplifiers (this is not the dual IC kind, but has a long string of transistors/mosfets) and the previously mentioned board that the main AC power goes into before it gets distributed to the fly-back and so on boards. I get about 156 volts to all boards mentioned yet on the power supply board for the convergence amplifier board, there isn't one proper voltage coming out at the +15, +53 sections. Instead it shows 13v on the +15 output and 2 volts on the +53 output. I am curious, if the board is getting the ON signal to the power supply boards or simply have some output caps that have gone bad. BTW, I re-solder the flyback twice and have checked the fuse at least 4 times. When I say re-soldered, I used solder wick to remove the old non lead solder then used 60-40 as it's replacement solder. Oh, before all this happened, the menu screen looked fine, convergence worked fine, just would separate the colors until it went into that 3D affect after about an hour or so, but it never really did bend anything like it is now. How would re-soldering one board, and checking all connections possibly cause an otherwise, "ok" tv to go bad. UGG. The only model number I see is in the subject line. (Re: [Ron.M] RCA R52WH74 convergence question). Do you know how many different model numbers RCA used this chassis in? You HAD a similar base symptom, but rest of current problems (after fuse & resoldering flyback) are your own doing. Which answers you own statement (Questions usually have a "?" - not a ".").
How would re-soldering one board, and checking all connections possibly cause an otherwise, "ok" tv to go bad. ------------------------- Location: Far, Far Away
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