Oki 2400 manual 24xx Print Quality Problems

24xx

Print Quality Problems

Symptom	Action
No print, but carrier	Adjust the form thickness lever to a lower number.
moves as if printing.	Be sure the printhead cables are not loose or
	damaged.
	Be sure the interface cable is connected properly.
	Check the ribbon cartridge for binds or damage.
	Go to “Print Speed Service Check” on
	page 2-28.
Print density is light.	Turn the ribbon advance knob on the print
	cartridge from 1 to 2 to increase the darkness of
	print.
	If the ribbon has reached its end of life or is worn,
	replace the ribbon cartridge.
	Go to “Carrier Service Check” on page 2-16.
Uneven print density	Turn the ribbon advance knob on the print
across the print line.	cartridge from 1 to 2 to increase the darkness of
Specific dots	print.
missing.	Be sure the printhead cables are connected
Extra dots or lines	correctly to the printhead.
printing.	Clean the printhead.
	Set the form thickness lever to position “1” and run
	the print test.
	Go to “Carrier Service Check” on page 2-16.
Scattered ink	Clean the printhead nose.
smearing, blurred	Clean the ribbon guide and shield.
characters.
	If the ribbon has reached its end of life or is worn,
Fuzzy print.
	replace the ribbon cartridge.
	Go to “Carrier Service Check” on page 2-16.
Wavy vertical lines,	Clean and lubricate the carrier shaft.
uneven left margin or	If the carrier drive belt is worn or broken, replace
character width is
	the carrier unit.
reduced.
	Go to “Carrier Service Check” on page 2-16.

2-10Service Manual