I would appreciate some suggestions on where to commence understanding a circuit board schematic diagram. To that extent, I have invested in the simplest phone I could - a Nokia 1100 - and dismantled it correctly. I also obtained access to its schematic diagram.
Several suggestions point towards understanding Ohm's Law and electricity basics. All I would want to do for now is to know what these black boxes represent. Here is the corresponding block diagram too.
Look forward to a prompt response.