I was asked to look at a plasma TV.
I used to be a colour TV engineer many years ago before I moved on to Avionic electronics and then scientific instruments.
The owner had been replacing the fuse because it kept on blowing .
Now its like a dodo ,so I took the Murata power supply away to have a look at what was not happening ,one of the current limiting resistors on the mains input is open cicuit ,and one of the HV mosfets is shortcircuit.
Looking on the internet for the power supply I found a repair kit ,two 10 ohm 5 watt resistors ,and two HV mosfets .
Also advice on the internet is to remove a module called IC201 and check two surface mouted transistors to make sure thet are not shortcircuit,before you replace the two mosfets.
Barry Wilkins
I used to be a colour TV engineer many years ago before I moved on to Avionic electronics and then scientific instruments.
The owner had been replacing the fuse because it kept on blowing .
Now its like a dodo ,so I took the Murata power supply away to have a look at what was not happening ,one of the current limiting resistors on the mains input is open cicuit ,and one of the HV mosfets is shortcircuit.
Looking on the internet for the power supply I found a repair kit ,two 10 ohm 5 watt resistors ,and two HV mosfets .
Also advice on the internet is to remove a module called IC201 and check two surface mouted transistors to make sure thet are not shortcircuit,before you replace the two mosfets.
Barry Wilkins
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