Iphone charger dead resistors

AlbertHall

Joined Jun 4, 2014
12,629
On the picture of the PCB, You can see KB1, KB2, KB3, I believe these are the diodes that form the rectifier bridge. There is another similar component there too, but I can't see a legend for it. The bridge is D1 to D4 on the schematic.

Therefore, I believe the component in question is a 20uH inductor, L1 on the schematic. The schematic doesn't show a value for L1. I couldn't find any colour code scheme which has a white fifth band.
 

AlbertHall

Joined Jun 4, 2014
12,629
The circuit board with the faulty components from the original post, is not part of the charger referred to in DodgyDave's posted link. You can also see this is true by looking at the case pictures from the original post. Therefore it follows that the schematic won't apply either.
 

Thread Starter

Endre Jenei-Molnár

Joined May 12, 2017
13
So if i lder a 22uh inductor, to the kb1 is it oke? the 2uh difference is not bad? And how can i measure an inductor ,because i have lot's of dead motherboards and dead chargers .
 
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