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#1 |
Senior Member
Join Date: Mar 2021
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 100
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![]() Hi to all
i have the above model of tv It has power supply bn44-00355a the problem is it burns the two mosfet TK8A50 page 5 of service manual I change the two mosfets after measurements I made without being able to find any other problem and again burns the new 2 mosfet can any of you help me figure out where these two components can burn? |
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#2 |
Badcaps Veteran
Join Date: Jan 2013
City & State: midwest
My Country: U.S.
I'm a: Knowledge Seeker
Posts: 7,698
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![]() Can you post the service manual so we can see what you are seeing?
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#3 |
Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 7,990
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![]() You likely have damaged gate drive components, check the DT1 to be sure the drive windings are not open, then check the resistors and diodes DM804 & DM805, you may need to lift one end to check them accurately
You should also check the diodes on the TM801S secondary as one might have shorted. |
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#4 |
Senior Member
Join Date: Mar 2021
City & State: Athens
My Country: Greece
I'm a: Knowledge Seeker
Posts: 100
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![]() thanks sir i will check it and i will tell you about
as about as service manual downloaded free from electrotanya Last edited by Xristakis795; 01-26-2022 at 02:18 PM.. |
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