That Samsung matches the pinout for power/gnd, and the fact that pin 4 is input-only also matches how it's used in the circuit. ADC is also available on the right pins.
A little more searching on the Internet about how to read/write those MCUs (the phrase "tool mode" in particular) lead to a forum about programmable remote controls, and eventually a patent and programming software and utilities (written in Visual Basic, it seems) for them... anyone want to do some more RE'ing with all this info? ![Wink ;)](https://www.eevblog.com/forum/Smileys/default/wink.gif)
I just received one 4 years after you guys off amazon, its chip is 20 pin samsung s3f94c4ezz-dk94
is this one that can use the board directly or do I have to snip this and add that and solder a trace?it says Sigma R700 smd rework station greek sigma symbol logo , came in a fancy card board box plastic foam inside for compartments, unfortunately gun wasn't wrapped some fingerprints and micro scratches, gun wire attached to case not removable, same gun with fan inbuilt.
I opened it to find the samsung and 2 other chips the samsung is in a socket, the other 2 are soldered on.
they are :
board id IC2
8 pin
mounted vertical parallel to 20 pin with markings:
ATMLU442
02C M B
4X0437D
next chip also 8pin
mounted horizontal
board ID IC 3
texas instruments
79W0G1FE3 hard to make out last 3 digits
LM358P
I've not powered it on yet looking for the checking grounding etc you-tube.,
also the gun harness and fuse as well as power are held in with white hot glue, none of it is stuck to case all 3 points rotate,with resistance.
I had read this site before ordering, and was hoping for the Atmel, as it says its a direct replace right?
I was also hoping that these Chinese factories (as they often do) implemented the mods mentioned here, obvi because they're pirates. certainly the description on amazon seemed to match.
how can i secure these 3 through-hole ?
add more glue?
remelt glue?
use the station on itself?