IBM 3000 manual Plastic, 23±42lbs ±135kg 83±157g

Table 27. Print Quality Symptom Table	(continued)
Symptom	Action
Blank spots (voids) or light areas not	v Ensure that the forms are smooth and ¯at. Feel the forms, especially near
near perforations	the perforation. If you ®nd lumps, bumps, or wrinkles, load another box
	of forms. This kind of problem can be caused by storing forms in a poor
	environment (for example, high humidity).
	v If you have been running labels, print a test job on plain paper forms to
	remove any adhesive residue that the labels may have left in the printer.
	v Clean the coronas. See step 24 on page 95 in ªCleaning the Printerº.
	v Press the Darker Contrast Control key on the printer control panel.
	v If the void or light area is in the shape of an adhesive label, call your
	service representative. See ªService Call Procedureº on page 13.
Print has white streaks.	v Clean the coronas. See step 24 on page 95 in ªCleaning the Printerº.
	If necessary, remove the coronas and look for forms chads in the wire or
	corona housing. Be careful not to touch the wire with your hands. See
	ªCleaning the Printerº on page 88.
Print is too light.	v Press the Darker Contrast Control key on the printer control panel.
	v Clean the coronas. See step 24 on page 95 in ªCleaning the Printerº and
	step 10 on page 90 in ª Cleaning the Printerº.
	v If you opened and closed the developer drain without replacing the
	developer mix, replace the developer mix now. Opening the drain resets
	the developer mix usage timer; this could result in the developer mix
	being used beyond its normal life and result in immediate print quality
	problems. See ªChanging the Developer Mixº on page 191.
Print rubs off easily.	v If print rubs off solid ®ll areas (logos, bar codes) on the form, press the
	Lighter Contrast Control key setting on the printer control panel until
	fuse grade is acceptable. Remember to adjust the contrast setting on both
	printers, when they are in duplex mode. This balances the contrast
	between the front and back of the forms.
	v Ensure that the Forms Select switch is set correctly for the forms being
	used.
	v Clean the oiler belt. See ªCleaning the Oiler Beltº on page 86.
	v Ensure that the forms were fused. For example, did you use Forms Feed
	when you should have used NPRO?
	v Ensure that the hot roll shield is up.
	v Load a different box of forms. The forms you are running may be too
	heavy (more than 160 g/mæ (42 lb) when running simplex mode, or more
	than 105 g/mæ (28 lb) when running duplex mode), or too moist, or have
	too rough a surface.
	v Ensure that no adhesive labels are on the hot roll.
Print is offset (double images).	v If you are printing on labels, ensure that the Forms Select switch is set on
	Plastic.
	v If you are not printing on labels, try setting the Forms Select switch to
	23±42lbs. (72±135kg) 83±157g.
	v Clean the oiler belt. See ªCleaning the Oiler Beltº on page 86.
	v Ensure that the hot roll shield is up.
Print is not correctly registered.	v Ensure that the print position is adjusted correctly. See ªAdjusting the
	Print Positionº on page 68 for more information.
	v Check forms alignment. See ªChecking the Forms Alignmentº on page 84.

Chapter 9. Print Quality and Problem Solving 267