Hi,
I have an iMac with the power supply reference: ADP-200DFB.
This power supply is not working and when trying to debug the problem with a multimeter, I found what I thought to be a short circuited diode (the short-circuit is to ground).
With the continuity test it beeps both ways, so doesn't block current flow at all then reverse biased. But after removing the diode the beep continues and the diode seems healthy. It seems to exist a real short-circuit.
As I have another ADP-200DFB power supply (faulty one as well), I have checked the same diode and it seems to be short-circuited as the first.
I don't know if you agree with me, but there should be another component which is connected to this diode, which is faulty and creating this short-circuit to ground.
Any ideas on how to debug this? Where should I start?
Thanks in advance.
Best regards,
Pedro
I have an iMac with the power supply reference: ADP-200DFB.
This power supply is not working and when trying to debug the problem with a multimeter, I found what I thought to be a short circuited diode (the short-circuit is to ground).
With the continuity test it beeps both ways, so doesn't block current flow at all then reverse biased. But after removing the diode the beep continues and the diode seems healthy. It seems to exist a real short-circuit.
As I have another ADP-200DFB power supply (faulty one as well), I have checked the same diode and it seems to be short-circuited as the first.
I don't know if you agree with me, but there should be another component which is connected to this diode, which is faulty and creating this short-circuit to ground.
Any ideas on how to debug this? Where should I start?
Thanks in advance.
Best regards,
Pedro
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