My grandmother asked me if I could fix her old portable record player, so I took a look at it and the motor wouldn't spin, so I opened it up and found a schematic inside. Nothing seems bad or broken in the machine, but when I measure the voltage between the motor + and - it's only getting 0.3 volts DC while it should be between 9 and 12 volts.
Upon further testing I noticed that when wiring the motor - directly to ground it works fine, yet in the schematic it goes through a little part of the circuit with two NPN transistors. Why is that part there and what does it do? Why not just wire it directly to ground?
BTW: I already took out and tested both transistors on a multimeter, nothing odd to them
As suggested by Jasen I checked the voltage on R571, and it's 11.09 volts on one side of it and, near to nothing on the other side. It's also a really weird resistor (picture added):