tv lcd Philips 42pfl9632d/10 Power board ko

[Bibu]

I have a problem with A tv lcd Philips 42pfl9632d/10 that has the power board ko.
I found some diodes burned, but they haven't any code anD is the first time that i see it.
Can anyone help me?
Thanks

[Diah]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

its look like coil. not diode

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

That is the Ferrite bead inductor, that is not the problem.
How about upload good clear pictures of the whole back side of the TV so we can see all the boards?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

budm thanks for the help, right now I don' t have the TV on hand.
but i have some photos of the power board, and the point that I think it burned.
Also the two MOSFETs in pictures I think are ko

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Did you check the resistor 3318 next to the grey rectangular cap to see if it has open circuit? Also check the capacitance of that grey cap.
BTW, are you getting ANY DCV on the cold side of the power supply at all?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Did you check the resistor 3318 next to the grey rectangular cap to see if it has open circuit? Also check the capacitance of that grey cap.

the resistor 3318 is good, i checked and it is 465 ohm, how i test the the "grey rectangular"?

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

You need capacitor meter to check the capacitance, but at this point are you getting any DCV on any of the connector on the Cold side of the circuit?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

unfortunatly i have only a normal multimaeter and i can't check that capacitors.

with only the power board connect, i haven't any DC voltage, i only have the 220v AC in input, and the 220v on the black connector

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

I will have to find the SCH for this power supply board number 310432848893.
Please take a pictures of the label where the model number of the TV is located, I need to see the Chassis numbers.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

This is the photo of the label

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

OK, Chassis # Q528.1E
Need to do the search for the service manual.

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

OK, Chassis # Q528.1E
Need to do the search for the service manual.

thanks a lot

but what kind of mosfet i can use instead of this mosfet P15NK50Z/FP

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

thanks a lot

but what kind of mosfet i can use instead of this mosfet P15NK50Z/FP

Do they tested as shorted between Source and Drain pins?

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Do they tested as shorted between Source and Drain pins?

yes, the 7005 and 7006, in the photo where there is the dark brown stain, the near resistor are ok, i don't know the coil, because i never see and test it

[Diah]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

...

why you think the power board defect? when you turn on the TV you have red Led on,,, Green led.. you have sound ???? .. you need to explain this so we could know where you should to check.

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Can I get better pictures of the bottom side of the board? The one in post #4 is not good enough for me to trace the connections.
If those two power MOSFETs shorted out, it should have caused the fuse or the FUSIBLE resistor to blow also.

[budm]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Can you upload the pictures of the backside of the TV so we can see all the boards?
Does it look like this picture?
Power supply PCB: 310431361715
Power supply PCBA: 310432848893

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

why you think the power board defect? when you turn on the TV you have red Led on,,, Green led.. you have sound ???? .. you need to explain this so we could know where you should to check.

I think that the problem is in the power board because i haven't any led light, any image, and any sound... Of course i'm not sure, i'm not an expert

[Bibu]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

Can you upload the pictures of the backside of the TV so we can see all the boards?
Does it look like this picture?
Power supply PCB: 310431361715
Power supply PCBA: 310432848893

Is like the second image of the datasheet

[Diah]

Re: tv lcd Philips 42pfl9632d/10 Power board ko

on the hot area near to the ac in after the IC big caps, - & + with DC read how much volts DC YOU HAVE IT SHOULD be 350 to 400 Volts