Royal Sovereign RSL-2701U 用户手册

3) unfasten the set screw (sprocket motor)

4) take out the sprocket motor from the motor

5) unfasten the three screws from the motor

6) detach the connector and change the motor

7) How to assemble is the reverse order of how

to disassemble , 6)→5)→4)→3)→2)→1).