Question about Panasonic Televison & Video
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Posted on Jan 02, 2017
I have seen a fault where the Plasma display was giving sparkling green dots, and then the set would shut down after about 10 minutes. After waiting for about 40 minutes, I would re-start and the process would work the same, and then the set would shut down.
I tried freezing the boards one by one with freeze-spray, and heating with a heat gun to see where the thermo fault could be. I had no success.
Fortunately I had access to a scrapper set of the exact same model. After spending many hours with the process if elimination, I worked the fault down to be the screen itself! Unfortunately, with the scrapper set that I had its screen was very weak. Swapping the screens between the two sets proved that the original screen has failed.
I don't want to discourage you. You may be down to the point of what I reached!
Posted on Feb 10, 2009
I contacted Panasonic and it seems that they will take care of the problem even though the TV is out of the 1 year warranty. They are aware that this is a manufacturing defect, apparently. I'll follow up later to let you know how it turns out.
Posted on Aug 03, 2009
Panasonic said "A" board,
A board SOS Detect (Explanation)
10 Blinks SOS: The voltage regulators IC5400 and IC5401 in the A board generate SUB9V and SUB5V. The 9V and 5V from these ICs are monitored by IC1100. Any abnormality on the SUB9V or SUB5V lines, triggers the shutdown circuit and the MPU shuts down the unit. The power LED blinks 10 times.
But need to measure the connection SC2, if it short, it will be the SC board.
The knowledge obtain from: Real case of repair by myself.
Information from Panasonic training manual.
Posted on May 10, 2010
SOURCE: I have the Philips 50
There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you repeatedly turn it on, it may eventually stay on, but every time you turn it off, the TV will get harder and harder to start up until one day it just won't.
Sometimes you have to do the opposite to start it up and unplug it for 5 mins, then try.
If you are handy with a soldering iron and can identify the power supply and inverter / FM section for the backlights, an inexpensive handful of capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V or 25V or even a 50V, but don't replace a 680uF cap with a 500uF or a 1000uF (unless you are positive it's only doing ripple filtering, and even then, you should go OVER, not under the uF rating).
Most of the caps that go are 10V 1000uF or 3300uF.
I found some great videos of the procedure (for many Samsungs with the same issue) on youtube.
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You-Tube video "BNHHrgX_6cs&feature=related" placeholder
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As you can see, this issue spans plasma TVs, as well as large and small LCD TVs and monitors.
The parts are cheap, and skill required is minimal.
Posted on Mar 25, 2011
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