Neovo F-419 no power.

[budm]

Re: Neovo F-419 no power.

You may have to clean off the flux residue on top of the IC to be able to read, it has to have some kind of printing on top.

[BobMollie]

Re: Neovo F-419 no power.

That is the problem their are no numbers on the top of the device. Maybe on the bottom but have to remove it to see.

[budm]

Re: Neovo F-419 no power.

No. Can you read the numbers as printed on the top? I would try new start up first.

[BobMollie]

Re: Neovo F-419 no power.

Do you know the part number for IC U801 ?

[budm]

Re: Neovo F-419 no power.

OK, it is either bad SMPS IC U801 or may be bad electrolytics startup/running cap (the one to the right of the Green main filter cap in the primary side).
https://www.badcaps.net/forum/attach...7&d=1427384387

[BobMollie]

Re: Neovo F-419 no power.

Does anyone have a parts list or schematic

[BobMollie]

Re: Neovo F-419 no power.

Now what?

[BobMollie]

Re: Neovo F-419 no power.

I do not see a part number on U801

[selldoor]

Re: Neovo F-419 no power.

What is the part number on U801

[BobMollie]

Re: Neovo F-419 no power.

-V To U801 pin 1 = 0 volts
-V to U801 pin 3 = 9.033 volts
-V to U801 pin 6 = 0 volts

[selldoor]

Re: Neovo F-419 no power.

And the voltages
https://www.badcaps.net/forum/showpo...9&postcount=44

Dont be fooled by the results he got - start high and work down.

[BobMollie]

Re: Neovo F-419 no power.

-V to U801 pin 1 = .22 ohm
-V to U801 pin 3 = 1.52 Meg ohm
-V to U801 pin 6 = .62 ohm
R821 to u801 pin 3 = .22 ohm

[selldoor]

Re: Neovo F-419 no power.

Can you do the tests on U801 in this post
https://www.badcaps.net/forum/showpo...0&postcount=42

NO POWER TO THE BOARD

[BobMollie]

Re: Neovo F-419 no power.

Budm are you still their??

[BobMollie]

Re: Neovo F-419 no power.

Ok everything hooked back up and the power light does not come on when I press power on.

[budm]

Re: Neovo F-419 no power.

OK, hook the logic board to the power supply board and see if you can see the LED power lights when you activate the power switch.

[BobMollie]

Re: Neovo F-419 no power.

Ok sorry it took so long to get back to you. Yes the jumper is removed. Now what, nothing happens.

[budm]

Re: Neovo F-419 no power.

Did you remove the jumper to isolate the inverter circuit from power supply?

[BobMollie]

Re: Neovo F-419 no power.

Ok where do I put my meter for this test? I also assume that the logic board is still disconnected.

[budm]

Re: Neovo F-419 no power.

OK, lets remove the jumper that feeds the B+ to the inverter circuit to see if the power supply will start up OK without inverter circuit in place.