supply imac a1418 and component not to be found

[phonetika]

Hello everyone,
I can't find this component in the figure ... it's the power supply circuit of an imac a1418 (ADP-185BF T).
Do you know where to buy it?

[piernov]

Re: supply imac a1418 and component not to be found

Looks like the PFC inductor. Hard to find separately, you can use one from a donor PSU. Why would you want to replace it though?

[phonetika]

Re: supply imac a1418 and component not to be found

it is short-circuited

[phonetika]

Re: supply imac a1418 and component not to be found

have a schematics for ADP-185BF T??

[KvnTM]

Re: supply imac a1418 and component not to be found

it is short-circuited

Are you sure about that? It needs to have a very low resistance because it is in series with mains input.
Measure exact resistance of the windings. I highly doubt that this is the issue.

[keks19]

Re: supply imac a1418 and component not to be found

Hi,
I was just wondering what kind of failure lead to your conclusion the inductor was the culprit?

[R_J]

Re: supply imac a1418 and component not to be found

That is very likely the pfc inductor and it will check as a short or less than an ohm. Here is a thread about the same power supply https://www.badcaps.net/forum/showthread.php?t=69871

[Francisco.s]

Re: supply imac a1418 and component not to be found

Most probably, there are some components (power PFC mosfet and smd diode) short-circuited.

I think the the smd diode S8GC - S8MC fails by itself, and causes PFC power mosfet to fail also, due to over-load.