Hello. I have a Samsung set that a customer says went out during a power outage or surge. From a visual inspection I see a burn mark on one of the transformers (pics included). Also, when I replace the pictured fuse (the one by the power plug connector) it blows immediately when I plug in the set. Could the transformer be the issue why the fuse immediately blows or could it be something else. I'd greatly appreciate any help. Thanks in advance.
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Samsung LN46C530F1FXZA Dead Set No Standby
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Re: Samsung LN46C530F1FXZA Dead Set No Standby
That T3 fuse is used for feeding B+ to the inverter circuit and the standby power supply circuit.
You need to test MOSFET's QI802, QI808, and SMPS IC ICM801(you need to get the P/N of this IC to be able to look up the spec sheet for the pin out of the IC) for low resistance readings between Source and Drain pins.
BTW, the main filter cap CP802 looks like it has domed top, is that correct?
Power supply/inverter board P/N BN44-00418A.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: Samsung LN46C530F1FXZA Dead Set No Standby
Hi thanks. The fuse that keeps blowing is the t6.3ah 250v not the t3. Just was clarifying that in case that's why you want me to test those mosfets and ic. And yeah you're right that filter cap is bulged. For some reason I couldn't see that until I looked at the picture. Do I still need to test those mosfets and ic?
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Re: Samsung LN46C530F1FXZA Dead Set No Standby
Originally posted by fharris1977 View PostHi thanks. The fuse that keeps blowing is the t6.3ah 250v not the t3. Just was clarifying that in case that's why you want me to test those mosfets and ic. And yeah you're right that filter cap is bulged. For some reason I couldn't see that until I looked at the picture. Do I still need to test those mosfets and ic?
Yes, you do need to test all those parts I mention, and both filter caps need to be replaced.
You may want to look if it will be cheaper to buy the board.Last edited by budm; 09-23-2020, 01:16 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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