I have a specific question regarding test and verification of circuits on PCBs such as the following one:
Since I am not from the electronics industry and never been in such a place I thought someone might have an answer to my question here.
Such a circuit on the above photo includes various components which are soldered on the PCB board above.
I am very curious how are each components or subsystems on such a a complex PCB are tested before assembling. Let's say such a circuit includes diodes and ADCs and voltage regulators ect.
Are these components tested one by one before being assembled/manufactured on the PCB? And secondly if they are tested on by one are there specific boards or probes for the tiny components which have extremely small pins?