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Table 16. Print quality symptom table (continued)
Symptom
Blank spots (voids) or light areas
not near perforations.
Print has white streaks.
Print is too light.
Print rubs off easily.
Print is offset (double images).
Action
v Ensure that the forms are smooth and flat. Feel the forms, especially near the
perforation. If you find 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 Clean the coronas. See Chapter 7, "Cleaning and Servicing the printer," on
page 255.
v Refer to "Creating a Snapshot" in the Planning and Configuration Guide to
adjust the contrast.
v Clean the coronas. See Chapter 7, "Cleaning and Servicing the printer," on
page 255.
v 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.
v Refer to "Creating a Snapshot" in the Planning and Configuration Guide to
adjust the contrast.
v Clean the coronas. See Chapter 7, "Cleaning and Servicing the printer," on
page 255.
v If an operator 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, which could result in the developer mix being
used beyond its normal life and result in immediate print quality problems.
See "Changing the developer mix" on page 289.
v If print rubs off solid fill areas (logos, bar codes) on the form, lighten the
contrast until fuse grade is acceptable. Remember to adjust the contrast
setting on both printers to balance the contrast between the front and back of
the forms.
Refer to "Creating a Snapshot" in the Planning and Configuration Guide to
adjust the contrast.
v Ensure that the hot roll temperature and the oil rate are set correctly for the
forms being used.
Use "Creating a Snapshot" in the Planning and Configuration Guide to adjust
the fusing temperature and the amount of fuser oil used during printing.
v Ensure that the preheat platen temperature is set correctly for the forms being
used.
v Clean the oiler belt. See "Cleaning the oiler belt" on page 306 if you need
instructions.
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
2
(more than 160 g/m
(42 lb) when running simplex mode, or more than 105
2
g/m
(28 lb) when running duplex mode), or too moist, or have too rough a
surface.
v Use "Creating a Snapshot" in the Planning and Configuration Guide to adjust
the fusing temperature and the amount of fuser oil used during printing.
v Clean the oiler belt. See "Cleaning the oiler belt" on page 306 if you need
instructions.
v Ensure that the hot roll shield is up.
Chapter 6. Taking care of problems
249
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