Question about Televison & Video
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Posted on Jan 02, 2017
These sets are common for bad connections on the ribbon cables connecting the screen to the drive printed circuit board. Or the drive circuit could have a bad drive scan IC. I doubt that but possible. Your going to need to call an AUTHORIZED sony repair servicer to trouble shoot this for you cause any other shop may not have a clue of this problem. Good Luck
Posted on Aug 09, 2006
SOURCE: I have a Sony tv
What users call solarization is a false contour effect caused either by video processing problems (often due to overheating), or by a defective plasma panel.
I have never seen a problem of this kind being caused by defective PSU.
There is a lot of false or wrong info on this topic published on the Internet (the term solarisation has been invented by users, this phoenomenon is not the same as digital image solarization in photography).
I wonder what eleimination process you used, and I wonder to what URL you are referring to.
If the problem is false contour, red faces and lack of contrast, it can be a problem related to main controller board, rather than PSU.
In the general confusion that dominates threads talking about "solarization", often problems due to incorrect picture settings, where no fault is present are often referring to solariaztion (eg. those rubbish pages titled "How to discover if TV has solarization before buying a TV".
If problem is very evident and does not go away changing picture settings, then problem is either main controller, G2 board (ausiliary graphic controller) or plasma panel. Problem is often associated to overheating.
If you are sure that the TV is faulty, as first line of action rather than attempting repair, I suggest calling Sony. You have three years factory warranty, and if really there is a factory defect, Sony will fix it even out of warranty.
Regarding the PSU, this is tested, reading the AC input, checking power cord for continuity, testing zener at AC input, testing individually resistors at outputs (ensure continuity), jumping activation lines and reading volts outs on different values, starting from 3.3V. When the PSU is defective, TV wont start, or will turn off by itself. Your problem is not PSU.
Below a service manual with full schematics, adjustment and repair procedure. As first thing call Sony.
To download part one, please, click here.
To download the part 2, please, click here.
Posted on Oct 12, 2010
SOURCE: I have a Sony tv
The only way to find out is to test it: if you don't have a great experience in electronics the only way you can do it is to take it out of the tv and check every single component. Start with the transistors, follow with the rectifiers, then check the stabilizers and finally the transformers.
Posted on Oct 21, 2010
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