Notes on printhead use after purchase

After receiving the printhead purchased from our company, if you go back and try to inject water into the printhead using a syringe to check whether it is clogged, this is a very unnecessary and dangerous practice!

First, once water enters the printhead, if you do not dry it completely before powering on the machine, it may cause damage — at best, it will burn the circuit board; at worst, it will ruin the printhead.

Second, the printheads we sell have all been strictly inspected and tested by the original manufacturer before shipment and are filled with protective fluid. Injecting water into the printhead with a syringe not only flushes out the protective fluid inside, but also, due to excessive or uncontrollable pressure applied by hand, it easily causes air blockage in the printhead, resulting in no ink flow.

The printhead surface is extremely fragile and must never be bumped or dropped. Please handle it with great care. The outer layer is an aluminum plate, while underneath it is coated with a crystal oscillator and very fine ink channels. Even a slight impact can cause dents, deformation, or even breakage, which will render the printhead completely unusable.

When installing the printhead, be very careful. Always turn off the power first, and make sure the printhead is properly seated. After installation, gently push the carriage left and right by hand to check if it moves smoothly. Do not power on immediately after installation, because if the printhead is not correctly positioned, moving the carriage may easily cause it to be crushed or broken. Using your hand provides better control and sensitivity, reducing the risk of damage.

When connecting the cable plug, make sure there is no ink on it, and ensure a good contact with the socket without touching the pins. Otherwise, it may cause a short circuit and burn out the printhead.

The steel shaft should also be clean and smooth. You can use a tissue with a small amount of lubricant to wipe it—do not apply oil directly onto the shaft. Excess oil may drip onto the printhead and cause damage

After confirming that the mechanical parts and circuitry are all correct, the next step is to check the water system. First, verify whether there is enough liquid in the ink cartridge. Then, inspect whether the small cleaning wiper and the ink suction pump are dirty

When a newly installed printhead contains air inside, it will not print correctly immediately. The printhead can only produce complete and clear lines after all the air is fully expelled.

First, you can perform intermittent cleaning — clean twice at a time, then pause for 30 minutes before cleaning twice again. Continuous excessive cleaning can cause ink buildup in the cleaning pump, which may result in color mixing, ink leakage, and waste of ink.

Second, printing more images can help expel air from the printhead during normal operation.

Third, if the machine has a waste ink tube, you can first power off, then use a syringe connected with a rubber tube to draw ink from the waste ink tube until about 3–5 ml of ink is extracted. After that, power on the machine and perform a normal cleaning cycle. This method forcibly removes air from the printhead but may cause ink buildup in the cleaning pump as a side effect

There are many important precautions when handling printheads, so untrained individuals replacing them blindly can easily cause damage. Therefore, within the industry, there is a rule: brand-new original printheads are guaranteed to be new and genuine but come with no warranty.

If you are not very familiar with the machine, we recommend that you have a professional technician replace the printhead to avoid unnecessary loss and trouble.