[time-nuts] Reverse Engineering the FE-5680A and how to take it apart (was: Determination of the placement of the first pps)

Attila Kinali attila at kinali.ch
Wed Jan 25 18:29:08 EST 2012

On Thu, 26 Jan 2012 00:21:46 +0100
Attila Kinali <attila at kinali.ch> wrote:

> * Do NOT force the PCB out. If you need to, wiggle gently. If you have
>   to use force, you've forgotten a screw.

Additional note: wiggle holding the heat spreader, not the PCB.

> If possible, i'd be interested in two Revision markings on the PCB.
> Mine has a sticker at the bottom, that reads "RevF".
> Then there is a PCB number on the top side, at the edge near the
> reference crystal (that with the PTC soldered to it). My unit reads there
> "217421-30352" "Rev G"

And a correction: the sticker reads "406" "RevF".

I think the sticker denotes the what population option was choosen,
while the PCB marking denotes the type and revision of the PCB.

Additonal note to self: do not take any device apart, when already
being half asleep. Also do not try to write emails and trying to make
any sense.


			Attila Kinali

Why does it take years to find the answers to
the questions one should have asked long ago?

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