Question about RCA D52W20 52" Rear Projection HDTV-Ready Television
I have a D52W20 (D5W20YX1, chassis ATC221) that I received from a friend as a project TV, and that I would like to get working. I am reasonably experienced in electrical engineering in many aspects, since it is both a hobby and something I do a fair bit in my work (I do electrophysiology and neuroscience research)... so I am very comfortable working inside the set and am aware of the safety issues involved. I'm not trained in TV repair, so any technical information and advice you folks can give me would be greatly appreciated. Most of the time, it will not start. After pressing the power button there is an immmediate faint click, and the green power LED will come on for about 10 seconds before turning off. The set will do this 3-5x, then require a minute or a few minutes before power-on can be attempted again. Sometimes (maybe 1 in 15 tries) the power light will stay on for longer - more like 30sec to 1min before turning off. Very infrequently - say 1 in 200 tries - there is an audible "thwip" and the crackle of HV electronics being energized, and the set will turn on! Sometimes it will stay on for quite some time, and when I first picked it up I managed to keep it on for a day at a time with no ill effects, though now if it turns on it will most likely shut down after a few minutes of use. Because the problem is intermittent and multi-symptomatic, I'm temped to start by cleaning/reseating all interboard connectors and reflow some solder joints at suspect locations. Snakehead, you seem to have given some advice to this end in other posts - can you elaborate on what solder points and/or connectors tend to be prone to failurs? Thanks in advance for any help you all can offer. I would also appreciate recommendations about service manuals - am I best off buying the official thomson one?
Try to reset the unit.. turn off and take the power supply cord off the socket for 30 min. Turn it on again.. Next, try to check the power supply circuit for any capacitor problem.
Posted on Sep 17, 2007
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Posted on Jan 02, 2017
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