Question about Televison & Video
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Red Blinking Light
These types of problems are allways hard to diagnose.. If you were to power on the set and preform tests, you would think that everything was fine until the moment it shuts off.
Look on the main power board and see if you cant find the thyristor (thermal switch), those are the things that when heated will cause the set to power off for safety reasons.. They are normally placed where ever a large heatsink is. That may give you a location as to the problem and you can put a meter around its 2 pins with the set off and unplugged a couple of min after failure, if its short (0 ohms) thats not the problem, if its open, it triggered the event.
Second, you can run the set for a while and check the voltages and Ve, Va, VCC, Vsetup etc and compair to the markings on the plasma PDP sticker. If you see one is falling down over time (volts will be lost as heat) then you can isolate that portion of the supply.
Third and allways the best way to go about these problems is buy a thermal gun and moniter various spots for heat.
Its just vary hard to say, resistance could be off somewhere, diodes could be overheating as well as fets and caps. Thats why a good thermal gun can point you to exactly where the problem is.
Hope this info helps, but I would suspect the problem is on the main power supply itself and not the y sus and z sus boards side boards.
Posted on Aug 26, 2008
If your set was manufactured around July 2005, you may need a firmware upgrade to solve this issue. On the Sony website you can enter your model # and serial # to see if you TV is affected. If so, it is easy to have done and may be free from Sony. It sounds like the issue they described in the writeup on the required formware update. I had mine done within few months of when i bought it (purchased in Dec 2005) and it has been working flawlessly since.
Posted on Oct 21, 2008
The problem can be caused by either a Bad Main bd or a Bad Power Supply bd. Those two boards are the common failures. Other boards that can cause this are the T-Con bd and the Inverter bds.. To determine if your tv is in or out of warranty you need to look at your tv Purchase Receipt and see what the Purchase date is. Samsung gives you a One Year parts and labor warranty from the date of purchase on your set. You can also call 1-800-Samsung for more assistance.
Posted on Jul 17, 2009
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