can somebody please explain the parts marked in red on the following image
The item marked 200mA is a fuse. The 4- 47000 ohm resistors are forming voltage dividers, each pair providing a voltage of 2.5V to the 2 centre pins of that plug. The 2.5 V on each is positive with respect to the lowest plug's pin. There is unlikely to be any load on the 2.5V., it is just providing a voltage.
The item on the left is a fuse rated at 200mA. The 47k items are 47 k ohm (47000 ohm) resistors. I have no idea what the circuit does, but at the 4 pin connector on the right, provides voltages of, from the bottom pin up, 0, 2.5 volts, 2.5 volts, and 5 volts. .
