1.Focusing position (zoom position)

1. The sliding rod of the focusing mirror is too tight. You can try applying an appropriate amount of   lubricating oil to the guide rod
2. Motor wire breakage can be resolved by replacing the motor wire
3. The focusing motor is broken, which can be solved by replacing the motor
4. Circuit board failure can be resolved by replacing the circuit board

2.The fan is not turning

1. The fan is burnt out, which can be solved by replacing the fan
2. Circuit board failure can be resolved by replacing the circuit board

3.Poor wireless reception

1. Without an antenna, it can be solved by replacing the antenna
2. Wireless circuit board failure can be resolved by replacing the wireless circuit board
3. Display board malfunction can be resolved by replacing the display board

4.Self check error (self check time too long)

1. If the motor wire is broken, you can try to find the broken wire based on the error message and replace it
2. If the program IC is faulty, it can be resolved by replacing the program IC
3. Circuit board failure can be resolved by replacing the circuit board

5.(The light flashes randomly)

1. Poor signal line can be solved by replacing the signal line with a new one
2. If the transmission signal line is too long, you can try reallocating the signal transmission distance
3. If the signal IC is damaged, it can be resolved by replacing the signal IC

6. dead (of batteries)

1. Check if the insurance is burnt out, which can be resolved by replacing the insurance.
2. Circuit board failure can be resolved by replacing the circuit board
3. If the switch power supply/transformer is damaged, it can be resolved by replacing the switch power supply/transformer

7.Scan stationary (XY axis stationary)

1. The scanning board fuse is burnt out, which can be resolved through the fuse
2. If the program IC is faulty, it can be resolved by replacing the program IC
3. If there is a circuit board malfunction, it can be resolved by replacing the circuit board without a power indicator light      

8.Scan card

1. The belt is loose, you can try adjusting the tightness of the belt
2. Motor wire breakage can be resolved by replacing the motor wire
3. The photoelectric switch has not been properly adjusted. You can try adjusting the position of the photoelectric switch
4. If the input voltage is too low, you can try adjusting the input voltage
5. The scanning motor is broken, which can be solved by replacing the motor

9.No display when powered on

1. Display board malfunction can be resolved by replacing the display board
2. If the program IC is faulty, it can be resolved by replacing the program IC
3. Switching power supply failure can be resolved by replacing the switching power supply

10.Power on collision noise

1. The position of the magnetic sensor and magnet has not been adjusted properly. You can try opening the chassis to adjust the position of the magnetic sensor
2. If the magnetic sensitive connecting wire is broken (or damaged), it can be solved by replacing the magnetic sensitive connecting wire (or magnetic sensitive)
3. Scan board malfunction can be resolved by replacing the scan board

11.Half or the entire group of LEDs do not light up

1. The LED connecting wire is open, which can be solved by replacing the connecting wire
2. Driver board malfunction can be resolved by replacing the driver board

12.Single LED does not light up

1.It may be a single LED damage, which can be resolved by replacing the LED