Re: Suspect Bad PS Apple AcBel API 1PC36

Finally had some time to troubleshoot some more on this.

Bridged the M8 pin with ground and the PSU [I]mostly[/I] turned on. The fan was spinning normally and something was clicking at a good clip (sounded like it was coming from one of the transformers maybe?).

I measured all the voltages and they were all just a bit short, 12v was closer to 10v, 5v was closer to 4v and 3.3v was about where it should be, the numbers were fluctuating a lot, so I'm guessing it was cycling on/off with the clicking.

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Re: Suspect Bad PS Apple AcBel API 1PC36



If it makes you feel any better, I am getting similar issues. I've replaced all the secondary caps mentioned in the thread (C7,C8,C10,C13,C16,C21,C29,C35,C41,C43,C59,C60) and am getting a few clicks from what seems like maybe one of the transformers? before it shuts down. Standby voltages look fine. I'll be trying the resistor test this week and see if I can measure any other voltages....