Below are the handling solutions for frequent faults of early printheads. Click the corresponding items to view detailed operation procedures:

1.Solution for Ink Leakage of Recovery Tube (See link below)

https://rpz-sp.com/faq/solutions-for-ink-leakage-of-recovery-tube/

2.Solution for Abnormal Phase Signal Display of Inkjet Printer (See link below)

https://rpz-sp.com/faq/solution-for-abnormal-phase-signal-display-on-old-version-inkjet-printers/

3.Solution for Ink Leakage at Recovery Tube Joint (See link below)

https://rpz-sp.com/faq/solution-for-ink-leakage-at-recovery-tube-joint-of-old-version-printheads/

Applicable Note

This abnormal phase signal failure only exists in old-version machines. The circuit design of new-version equipment has been optimized, and this modification is unnecessary.

Modification Steps

1.Disassemble the printhead and trim the 2nd, 9th and 10th metal contacts on the lower circuit board flat.

2.Unscrew all fixing screws of the lower circuit board and remove the board.

3.Use an electric soldering iron to desolder the orange and black phase signal wires from the circuit board.

4.Solder two separate wires to extend the orange and black phase wires respectively, and cover the welding joints with heat-shrink insulation tubes for insulation protection.

5.Solder the two extended wires directly to the matching positions on the upper circuit board corresponding to the contacts on the lower circuit board one by one:

a.The black extended wire matches the 2nd contact of the lower circuit board, solder it to the position on the upper circuit board corresponding to the 2nd contact, which is where the black wire is pre-soldered in the picture;

b.The orange extended wire matches the 10th contact of the lower circuit board, solder it to the position on the upper circuit board corresponding to the 10th contact, which is where the red wire is pre-soldered in the picture. (Refer to the figure below for soldering positions. The yellow wire shown in the picture is not required and shall be ignored during circuit modification. The 9th metal contact on the lower circuit board shall be left unconnected without any wire.)

6. Reinstall the lower circuit board and fasten the fixing screws, then fit the printhead cover back. Take care not to squeeze the internal wires when installing the cover to avoid wire damage and short circuit.

Supplementary Tips

After modification, power on the equipment and check whether the phase signal is normal. The modification is completed if the signal is stable without error alarms.

Background Note

This ink leakage issue only occurs on old-version printheads, caused by defective material of the original recovery tube. Newly produced printheads of the latest version have optimized tube materials, so this failure will not happen and no pipeline replacement is required. If ink leakage occurs on the recovery tube of old equipment, replace it with a spare ink tube of different material by following the steps below:

1.Disassemble the printhead and remove the original old recovery tube (See figure below).

2.Open the ink compartment of the cabinet, take out the spare ink tube, and cut a 2-centimeter section from it (See figure below).

3.Use tweezers to widen the openings at both ends of the cut tube (See figure below).

4.Connect the processed spare ink tube back to the recovery pipeline (See figure below).

Supplementary Tips

After tube replacement, start the ink line and inspect all tube joints for ink seepage. The equipment can operate normally if there is no leakage and ink recovery runs smoothly.

Applicable Note

This ink leakage issue is caused by the pipeline joint structure of old-version printheads. The joint structure of new-version printheads has been optimized, so this treatment is not required. If ink seepage or leakage occurs at the recovery tube joint on old equipment, follow the steps below:

1.Cut two small pieces of sponge adhesive tape for standby.

2.Remove the printhead upper cover, and attach the sponge tape to the side of the recovery tube joint for barrier protection.

3.Prepare epoxy AB glue and mix it thoroughly at a 1:1 ratio.

4.Apply the mixed glue evenly to the metal pipe joint, making sure the whole seam is fully filled. Take care to avoid blocking the recovery tube port with glue.

5.After gluing, place the printhead at a downward tilt and leave it to cure for 12 hours. The tilted placement prevents glue overflow to other components.

6.After 12 hours of full curing, reinstall the printhead upper cover.

Supplementary Tips

After assembly, run the ink line for a period of time and check the joint for ink seepage. The treatment is completed if there is no leakage and ink recovery runs smoothly.

Clean the ink system, replace the filter and dust-proof cotton, then reset the maintenance time.

1. Check if the break point adjustment is normal.
2. Confirm that ink viscosity and pressure are within the standard range.
3. Clean the printhead and nozzle.
4. Verify that the printing distance is appropriate.

Open the lower compartment and add the original dedicated ink or solvent accordingly.

Cause: The printhead is damp or contaminated.

Solution: Thoroughly clean the printhead, dry it completely, then restart the device.

Cause: Nozzle clogging, ink channel deflection, or ink failing to enter the collector.

Solution: Run the Nozzle Unlock or Reverse Cleaning function, clean the printhead and dry it thoroughly, then check whether the ink line is normal.