What if the shredder doesn't reverse the shredding?

The shredder consists of a group of rotating blades, a paper comb and a driving motor. The paper is fed from the intermeshing blades and divided into many small pieces to achieve the purpose of confidentiality. At present, the main brands of automatic shredders in China are Miki shredder, Qixin shredder and bonsai shredder. Basic faults and solutions of paper shredder. I. Inversion: 1. There is something wrong with the motor, just change it (rarely). 2. No shredded paper: 1. If the motor does not break the paper and the paper jam is caused by improper operation, turn on the machine head, turn the fan by hand to drive the cutter to rotate, then clean up the paper scraps, and then turn on the power supply to idle it for many times to clean up the paper scraps; 2. The motor rotates abnormally, the accessories are damaged, and the gears or belts are damaged. Remove the nose and install the accessories (see the accessories list); 3, the motor does not turn to heat, and the motor is equipped with an over-temperature protection device. When the machine runs for a long time and the temperature is high, it will automatically cut off the power supply and cool to room temperature, and it will automatically resume operation; 3. Power supply: (indicator light is off) 1. Whether the main switch is turned on, and check whether the switching power supply is turned off; 2. Whether the contact switch on the machine is fully contacted; 3, check the circuit board, whether the line on the circuit board is broken; 4. The circuit board is broken. 4. Direct access: 1. There is dust or scraps of paper in the electric eye of the paper inlet, which can be cleaned; 2. Adjust the electric eye, slightly shorten the distance between the two electric eyes, disassemble the upper cover of the nose, and press the piezoelectric eye inward with tools at the two electric eyes. 3. If the relay on the circuit board fails, replace the relay with the same parameters (general product); 4. The circuit board is broken. 5. The machine head is jammed by a large amount of paper 1. Improper operation. When shredding paper, put the paper flat and parallel into the paper mouth, and the paper scraps in the next box must be cleaned up in time, otherwise the paper scraps will jam the nose and cause a lot of paper jams. 2. Paper jam caused by moving and shifting or improper installation of the cutter was returned from the factory. (rarely) 6. There is a strange sound of metal touching plastic when the new machine is unpacked 1. Internal displacement caused by long-distance transportation or man-made collision. Open the nose to check. Most of the metal plates that block the scraps of paper contact the knife set, and the angle is slightly corrected with tools. 2. Other problems need to be returned to the factory for maintenance.