GRAPHTEC SignJet JS310-25ES, Service Manual, Page: 81 / 141

8. Print Head Adjustment Procedures
74 JS310-UM-251-9370
8.5 Printing the Nozzle Check Pattern
Before performing any adjustments, print the nozzle check pattern and check the printing status of the nozzles.
If there are several non-firing nozzles, perform a printhead cleaning operation.
(1) Print the nozzle check pattern.
(a) From the main menu, select [ Cleaning Tool ] and then press the ENTER key.
(b) From the submenu, select [ Jam Test ] and then press the ENTER key.
(c) Printing of the nozzle check pattern will start automatically.
Non-firing areas (Missing dots and scratchy lines)
Satisfactory printing (no non-firing nozzles)
When there are non-firing nozzles
(2) When there are non-firing nozzles perform the print head cleaning.
(a) From the main menu, select [ Cleaning Tool ] and then press the ENTER key.
(b) From the submenu, select [ Clean Post ] and then press the ENTER key.
(c) The print head carriage moves to the cleaning position.
(d) Check that the levers on the 3-way valves for each of the ink tanks are in the ink supply position.
(e) Press the Ink button located at the cleaning position to feed ink through the print heads.
(f) From the main menu, select [
Cleaning Tool ] and then press the ENTER key.
(g) From the submenu, select [ Auto Clean ] and then press the ENTER key.
(h) Negative pressure cleaning is executed, and then the printhead carriage returns to the Home position
automatically.
(3) Print the nozzle check pattern once again and check the status of the nozzles. If several nozzles are still not
firing, repeat the nozzle check and cleaning procedures.