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A quite small circuit, a clear picture of the IC part numer whose datasheet for sure give a general narrative of it's purpose.
What prevent you from drawing its schematic from the layout?
Did you even make a search on the Web? I'm too lazy to do that for you.
hi
search on the Web? i do image search google but not???
still I do from drawing its schematic from the layout? need time
if I found ??… I will give datasheet
thanks a lot for help
It seems you don´t have a clue about it´s function nor where it comes from...
The circuit probaly is more than 30 years old.
Why are you so interested in it´s function? There most probably now a remore modern solutions for the same.
You post three photos, all show the same view.
We can´t see the wiring nor the marking of all parts.
But even if we do .. it still wil be hard to find out it´s function ...
and if we do .. it will be hard to find a circuit to use it in future.
My personal opinion:
Isn´t it a waste of time to look for a problem that you didn´t have before?
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