1. Turn on the machine and carriage reposition normally. Turn on PrintExp and then show a note of Initialize the printer failed or Machine model incorrect:
1) Check USB data cable connection, whether damage or not.;
2) Check whether the USB driver is installed properly;
3) Re-install the PrintExp software.

2. Turn on machine, carriage do not reposition
1) Check the figure signal and LINK LED on the Hear board and Main board. If the LINK LED is off then check the connection of the optical fiber;
2) Check the connection of the X / Y motor driver signal cable.

3. Turn on machine, carriage goes to the opposition direction of home
Check the connection of the X / Y motor driver signal cable.

4. Position error during printing:
1) Check whether the X motor belt and the gear is loosened or damaged ;
2) Check the X motor;
3) Check whether the encoder is dirty or scratched;
4) Check whether the encoder sensor is dirty or defective ;
5) Keep a distance from strong magnetic field. Prevent using instable input power. Equip a UPS and stabilizer.

5. Error and interruption during printing:
1) Check whether optical fiber is connected well;
2) Check whether printhead data cable is connected well;
3) Check whether the signal cable between mainboard and Servo motor driver is connected well;
4) Check whether the USB data cable is normal; Change to another USB data port;
5) Check whether the grounding is well.

6. Color missing during printing
1) Check whether damper is air leaking and causing the ink flown back;
2) Check whether there is fiber or some tiny thing stick on the surface of the printhead;
3) Check the environment temperature is too high.

7. Carriage move normal but not printing:
1) Check whether the power supply is normal on the electronic board;
2) Check whether the printhead data cable is connected well;
3) Check whether there is ink in the damper;
4) Check the connection of the optical fiber.

8. There is vertical banding during printing
Stop printing and clean the carriage bearing and steel rail. If the problem still exist, please contact the local engineer.