This is the DC motor of yamaha mt1x 4 track tape recorder. The motor is not working and i would like to know maybe if i can fix it. This motor turned for a while and then it totally stopped.
These are the brushes and the circuit. In the picture there are also voltages i measured when the motor was connected to the tape recorder.
The motor disconnected from the device when i power it with 9v it draws 20 mA which is too low i guess. I am very unexperienced with motors. Would you point me to the right direction for debugging this motor? Unfortunately i couldn’t find the datasheet. also why do i measure the supply voltage on the middle two pins?