Upon opening the set, I went directly to the HOT (since there was no stand by light) and I checked the voltages there and I was not shocked to see that there were no voltages there. There were some black marks on the HOT which gave me the indication that it is a blown HOT. It was (C5297). I soldered out of the board and yes, it was blown. I put a 100 watt light bulb connected to the collector leg and to ground and fired up the set but still, there was no voltage reaching the collector the HOT in the high tension area.

I started tracing the problem backward to see if the line to the secondary output of the power supply is cut off or there is bad component in it but, the line was ok. And there was 128 volt readings on the secondary diode which assured me of a problem in the high voltage area. As I was cleaning the area of the HOT, I found some burn marks on a diode next to the HOT. I think this is a damper diode (RU4DS). When I soldered out and checked it, it was shorted.

I replaced these two blown parts and I soldered them on board and fired up the set. It worked but it showed another problem in this set. It was an East/West problem (pincushion out). The picture was curved from the sides and it looked funny. With this kind of problem, usually the East/West coil or some capacitors or the voltages not reaching that area. I started checking that area to make sure all the components are ok. I found an open resistor in that area (R313) 3 ohms which tells me it is a resistor fuse that is open due to the short that took place in the high voltage area. The resistor fuse was connected directly to the east/west coil which by the way checked ok with a LOPT/FBT meter.

I replaced the resistor fuse and fired up the TV set. As always, I tested the TV set by turning it on for at least two hours. It worked fine and I was happy with it.

About

10 years of practical electronics. owner and operator. I service the Bethlehem area in Palestine. I repair Xbox 360 and all play stations and modify their power supplies. also repair lcd and Plasma tv sets, and lcd computer monitors. I have a degree from Bob Jones University in general business and one year degree in Industrial electronics. a intensive course in Media. I also work as a camera and audio man as a free lancer. Also great experience in video editing and installing surround systems for home and movie theaters.

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