Re: Funai LF320FX4F Power Supply Issue?
If u replaced both boards and still the same problem.then most likely its the LED backlights at fault.
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Re: Funai LF320FX4F Power Supply Issue?
Sorry I dont have the tv anymore-it was a customers that I repaired. I should have measured the voltage from the cathode side as well.However ,from memory I can recall the voltage did jump up to about 45 volts give or take a little when I turned the TV off.I coulld send a pic of the bad LED strip(dont know what good that will do)Which is in my opinion the main problem with this model
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Re: Funai LF320FX4F Power Supply Issue?
Youre probably right BUDM, But I noticed this TV has only one LED strip in it with 16 leds in series.The LED strip also has a two wire connector .A red wire connector (anode)..and a black wire connector(cathode).And when measuring the red wire's voltage(on a working set) I get 21 volts.I'm not sure why but maby there is some more amplification from the LED driver IC.What do you think??
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Re: Funai LF320FX4F Power Supply Issue?
should be 21 volts for the LED STRIP. And 13 volts for the other output.
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Re: Funai LF320FX4F Power Supply Issue?
It's the transformer oscillating at a much lower frequency than normal .There is a short some where possibly on the main board.Unplug the tv and Disconnect the main board from the power supply .Now plug it back in,and if the whining noise stops then you need to replace the main board .
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Re: Funai LF320FX4F Power Supply Issue?
I agree this model is known for bad LEDS. There has been several cases of this.I just had to replace the LED strip in one of these with the same symptoms everyone is talking about(caused by one of the LEDS shorted)
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