Question about Sharp 32C241 TV
TV was fine one day, and the next day the picture is very fuzzy or blurry. Even the green words displayed when you call up the menu are fuzzy, with maybe a 3/4 inch spread from center (so a clear word is displayed like the ink had been smooshed 3/8ths from center in all directions). This occurs on cable, DVD, and antenna TV input, and on VID1 and VID2 inputs. I am actually an electronics technician with about 14 years experience, but not on TV's, and with a 3 year old child and a 7 month old child, I dont have the time or safe workspace to trouble shoot any length of time (plus no schematic). If someone could point me towards a handful of parts to check I would be very grateful! (need your MRI machine or CT Scanner fixed?, Maybe cell phone or radio?) Thanks in advance!
Ok with you I can skip the "do you have electronics experience?" questions. With 14 years under your belt you are a pro. So here we go. The problem you are experiencing is called blooming/loss of focus this occurs when there is an increase in CRT anode voltage and control of the electron guns (in the CRT) is lost. The result is the picture spreads and focus is affected. The problem can some times be taken care of by adjusting the focus control However if you have auto focus the auto focus circuitry might be the problem. The common parts (areas) to check are as follows: 1) Focus control (to see if the problem can be soled by adjustment) 2) IHVT anode (test to see if voltage is correct you will need a schematic and a high voltage probe) 3) CRT Socket board ( Check to see if the bias voltages and input signals are correct you will need a schematic, multimeter and oscilloscope) These would be the areas to check, I hope that you are seeing my point here. My next bit advise if not one of your experience, you have that, 14 years of it. However, you have little ones and they are your NUMBER ONE concern, So my advice would be to get the set repaired at a TV repair shop. The reason being is because even though I have named some places to start your troubleshooting, TV repair is not an easy thing and there may be other components that could have gone bad and you don't have the time to do investigative troubleshooting. I wish you well on this issue and take care of those little ones. Respectfully Submitted, Shuttle83
Posted on Sep 22, 2007
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