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TVs

TV. lg 47lb6100-ug does not turn on, unstable voltage on main card.

alberto_copete

hace 6 años

Can you help me with a diagram? from a tv lg 47lb6100-ug 404rmmd71443 series in advance thank you very much. I need it to guide me and try to find the damage. I tell you to start the source manually and I deliver the voltages correctly but when connecting the main it starts to distort the voltages it seems I have a short in the 12v input line. .regards

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Javier Honduras

1.957

hace 6 años

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hace 6 años

Greetings ... check the video plate for a short circuit in the surface capacitors if any measure in continuity and there is no coil or low resistance nearby take it out and check that it is not short ... try removing the selector in case it was damaged and It is annoying also check the video inputs hdmi usb rca that there is no signal of any carbonized component .....

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alberto_copete

hace 6 años

Thank you very much for the suggestions I will try to do it although I feel that I am going blindly without the map. as soon as I have some more information. I raise greetings

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alberto_copete

hace 6 años

I already found the fault Javier Honduras thank you very much. a low burned resistor (BLM18PG121SN1D) and a short capacitor (C2400
10uF
16V) very close to IC2400
BD86106EFJ I took the information from (CHASSIS: LC46B
MODEL: 47LB5800) I don't comment anymore because I am an apprentice apparently it is the circuit called buck if I am in error please clarify me.

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Javier Honduras

1.957

hace 6 años

Excellent Alberto you know if you could upload an image indicating which component was the cause of the failure would be excellent since that visual support would serve a lot for future consultations of other technicians who have a fault like yours in this TV model and thus provide information valuable to the forum

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