The sound is made by the gear wheels when running, which is normal and not affecting printing.
When changing the inked nylon, the spring is assembled in a wrong way. Should reassemble the spring by opening the cartridge.
A. Different area or different manufacturer for the printer cause the problem. Should change into compatible ribbon.
B. Detent of the cartridge is broken during the shipment. Should change the ribbon.
C. The cartridge emplacement of the printer was deformed. Should mend the printer.
A.The inked nylon ( near the pritner head ) wasn't be assembled correctly. Should reassemble the inked nylon.
B.The flat spring on the pulling side was deformed, bend the spring and reassemble it.
