Problem 1: Nozzle Test Shows Broken Lines
Symptoms: The lines in the nozzle test pattern are discontinuous, with gaps. The printed finished product has fine horizontal white stripes on its surface.
Repair Method:
- First, check if the ink tubes are bent and if the ink cartridges have sufficient ink. Do not overtighten the ink cartridge caps. If there are white broken lines, shake the white ink cartridge to mix the white ink evenly, and check if the white ink circulation is working properly.
- Select cleaning in the software and record a video of the cleaning process (this step checks the height of the capping station and wiper blade). Check the cleaning parameter settings.
- Turn off the printer, then use a syringe to draw ink from the ink sac to ensure there is no residual air in the ink tubes. If a specific color test strip shows broken lines, swap the ink sacs to determine whether the ink sac is the problem, and replace it if necessary.
- During cleaning, check the ink pump’s operational status. If the ink pump is not working, it needs to be replaced.
- If the nozzle test does not produce ink, check if the two tubes under the ink pad are properly connected and if the ink pad is aligned with the print head. Check if the print head is installed correctly and if the print head screws are tightened.
- If the broken lines on the test strip are not severe, first perform regular cleaning in the software 2-3 times. If the lines are still broken, soak the ink pad in blue (DTF) cleaning fluid or pink (UV) cleaning fluid, wait 10-15 minutes, then clean. Do not soak for more than 30 minutes.
- Check if the ink has expired. If it has expired, you need to clean the ink from the machine and empty the ink path system.
Problem 2: Slanted Printing
Symptoms: The test strip shows slanted printing.
Repair Method:
- Use a lint-free cloth dipped in cleaning fluid (DTF or UV DTF) to clean the print head surface and the wiper blade, and check whether the wiper blade is deformed. If it is deformed, it needs to be replaced.
- Check for static electricity. You can add a humidifier or turn on the air conditioner, and ensure that the machine is properly grounded.
- Check for sediment in the ink, especially the white ink, which needs to be shaken well. Do not use expired ink.
- Soak the ink pad in cleaning fluid (DTF or UV DTF), wait 15-20 minutes, then clean and print a test strip.
Problem 3: Garbled characters in print output
Symptoms: White blobs or garbled characters appear in the printout.
Solutions:
- Check if the print head cable pins are bent, if there are broken solder joints, or if they are stained with ink. If any of these are present, the cable needs to be replaced.
- Reconnect the print head cable and check if it is connected correctly (the print head itself might be damaged, causing the garbled characters).
- Check if the print head screws are secure and fully tightened.
- Clean the encoder strip or encoder sensor. If damaged, it needs to be replaced.
- The carriage board or adapter card may be faulty; further diagnosis is needed. If damaged, it needs to be replaced.
