SATO DR300 manual Paper fed, but no printing

DR300 Quick Guide	Pg 12		DR300 Quick Guide		Pg 21
			Paper fed, but no printing
				Check Point	Remedy
		1.		Is the thermal head dirty or is there a	Clean dirt off thermal head with cleaning
				label stuck on it?	kit.
					*Avoid using metallic tools which may
					damage the print head.
		2.		Are genuine labels, carbon ribbons	Genuine labels, carbon ribbons exclusively
				exclusively for the equipment being	for this equipment must be used. Available
				used?	from SATO.
		3.		Is the pitch sensor dirty?	Clean dirt off from pitch sensor with
					cleaning kit.
• Close the thermal head by turning the lock lever to the direction			Poor print image
of the arrow.				Check Point	Remedy
• Close cover.		1.		Are the labels, carbon ribbons	Check if labels, carbon ribbon are fixed
				properly set?	firmly and at the correct position by lifting
NOTE					head assembly.
If thermal transfer in use,		2.		Is the print darkness too light or too	Re-set the print darkness via user mode
ensure correct ribbon is installed.				dark?	setting.
		3.		Is the platen roller dirty?	Wipe dirt off the platen roller with cleaning
					kit.
		4.		Is the thermal head dirty or is there a	Clean dirt or label glue from thermal head
				label stuck on it?	with cleaning kit. Remove label if it is stuck
					onto the print head.
		5.		Is the label used dirty?	Use clean label.
		6.		Are genuine labels, carbon ribbons	Genuine labels, carbon ribbons exclusively
				exclusively for the equipment being	for this printer must be used. Available
				used?	from SATO.
			•	Disconnect printer from mains before cleaning.