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Yongnuo YN560-IV Speedlite Wireless Camera Flash Teardown and Analysis

Engineer and artist Æva does a teardown on a Yongnuo speedlite flash, with some good pointers for miniature screw placement and removal, along with an analysis of multiple PCBs contained inside the unit, including high-voltage components, TI ICs, op-amps, and more.

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I wanted to know what sort of trouble I was going to get into with hacking this flash so I did the natural thing and took it apart! This is the first teardown I’ve documented so it won’t be perfect, but learning opportunities are neat.

One juicy tidbit I took out of this is that the external high voltage connection feeds directly to the power supply board through a decidedly less esoteric connector. You can see it on in the middle of the top view of the power supply right between the cap and the transformer. Within a matter of minutes I found a few candidate mates for this 1.25mm detent locking connector.

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