Delete comment from: Ken Shirriff's blog
Hi Ken, your article is mind blowing! Thanks for the effort and I really enjoy reading it.
By the way, I am confused with the circuitry on the second board, particularly in the Q3 and Q4 transistors. I couldn't figure out how the logic work between PC2 and the two transistors.
Is it possible that the collector pin of Q4 is actually connected to pin 4 of PC1?
i.e. PC2 is switching the VCC to PC1. If PC2 is off, PC1 would be off too.
That seems to be a better match to return logic PC1 AND PC2 back to L6565 INV.
Is my wild guess possible?
Nov 7, 2013, 2:15:09 AM
Posted to Apple iPhone charger teardown: quality in a tiny expensive package