Citizen CBM-920 service manual Troubleshooting Guide

CBM-920 Service Manual

4-2 Troubleshooting Guide

	Phenomenon	Cause	Check Method	Remedy
Printing failure		Faulty power supply	Check whether 5 V DC is	Supply 5 V DC.
			available.
		Faulty mounting and	Check mounting and	Connect the interface
	No printing	connection of an interface	connection of the interface	cable correctly.
		cable	cable.
		Faulty printer		Replace the printer
		mechanism		mechanism unit.
	Thin printing	Faulty power supply	Check whether a 5 V DC	Use the power source
	color		power capacity is sufficient.	with a sufficient capacity.
	Missing dots	Foreign substance	Check the head for any	Eliminate the foreign
		adhered to a printing	adhered foreign substance.	substance.
		head
	Bad printing	Faulty ribbon		Replace the ribbon.
	quality
Paper feed failure		Faulty connection of a	Check connection of the	Connect the connector
		motor connector	connector.	correctly.
	A printing paper	Faulty power supply	Check whether a 5 V DC	Use the power source
	feed motor does		power capacity is	with a sufficient capacity.
	not function or		sufficient.
	malfunctions.	Faulty printer		Replace the printer
		mechanism		mechanism.
	The printing	Paper feed failure	Check whether or not the	Eliminate unnecessary
	paper is not fed		printing paper is jamming	printing paper and re-set
	or fed		or torn and caught in a	it correctly.
	irregularly.		paper path.
		Foreign substance in the	Check the motor gear of	Eliminate the foreign
		gear	the printer mechanism for	substance.
			any foreign substance.
		Broken gear	Check the motor gear for	If broken, replace the
			breakage.	printer mechanism.
Faulty sensor		Faulty paper sensor	Check the window of	Eliminate the foreign
	Does not detect		the paper sensor for any	substance or replace the
			foreign substance.	printer mechanism.
	the printing
	paper.
	When the trouble		Replace the control	Replace the control
	still persists		board and check	board.
			whether the printer
			functions properly.

* For the printer mechanism MD910 series, see the Service Manual separately provided.

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