Question about Samsung PCH521R 52" Rear Projection Television
I replace most of the components at the horizontal output, when I put out the LC circuit at collector of the output transistor, the high current disapear, but have small HT, if I put out the C asociates at colletor the HT are increased, but not good.
The Fly-back was replaced, the transistor was replaced, etc,etc,...
I have this projector working without all this components, but have problems in the left side of the screen, distorsions.
SOURCE: Horizontal Output transistor
IGBTs do not work well at high frequencies. They are not very linear, either. Even if it works, you'll likely wind up with a compressed and distorted picture.
Just put in an equivalent output transistor and call it a day.
Posted on Feb 04, 2009
Many times, the only problem is hte transistor itself. There is really no way to determine whether or not additiona parts are required until the known defective one is replaced. If there are other symptoms once the transistor is replaced, post them here and we'll guide you to the defective parts.
Posted on Feb 09, 2009
SOURCE: Flashing power light
Check for these power supplies on the Sub deflection board first on the right side of the board there are two Connectors one is a 12 Pin connector CN803 From the top of the connector the wires should read;
Next is the connector below that one which is a 10 pin connector CN802 they should read
Next is a 14 pin connector on the top left side of the board CN801 those should read
Check those supplies and see if they are correct or if any are missing
Posted on Mar 09, 2009
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