Imac 27 2013 PA-1311-2A1 shorted

mobajer

New member
I have found short on red marked diode.The diode is good, there are no shorts on caps, transistors, diodes. is there schematics for that power supply?

any advices?
 

Attachments

  • photo1840.jpg
    photo1840.jpg
    5.7 MB · Views: 4
  • photo1841.jpg
    photo1841.jpg
    5.3 MB · Views: 2

Inwerp

New member
this should help:
https://www.youtube.com/watch?v=pffOJdCQ7kw&t=67s

it looks like a part of the rectifier circuit. i would start with the transistor, however, there's no info - do you have a short circuit on your mains?
honestly, if you had a short in this area, you would not have any doubt about that - this is a high voltage area, any short here blows fuse or smokes pretty bad.
 

dukefawks

Administrator
Probably because it is across a coil. Fixing these PSUs is a complete waste of time as failures are very often catastrophic and multiple parts and chips have burned out. Don't waste time on these unless it is a simple failure like a popped fuse because of a shorted rectifier or main cap.
 
Top