IBM 6400 - Model 008 B/W Line-matrix Printer, Operator'S Manual

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Solving Printer Problems
79 Operator’s Guide
If you are having print quality or other problems,
locate your printer problem in the table below
and do the Corrective Action. If more than one
corrective action task is listed, test the printer
after each task. If the problem persists, contact
an IBM service representative.
Problem Corrective Action
Poor print quality:
dark print
light print
light print on half the page
missing dots or characters
smeared print
wavy vertical lines
1 Adjust the forms thickness lever setting.
Print quality can be affected if it is too
loose or too tight.
2 Adjust the paper tension horizontally by
moving the right tractor. Print quality can
be affected if it is too loose or too tight.
3 Make sure the ribbon threads around the
ribbon guides and between the hammer
bank cover and ribbon mask, as shown
on the ribbon path diagram. Turn the
ribbon spools to ensure that the ribbon
tracks correctly in the ribbon path.
4 Clean the printer (page 75).
5 Replace the ribbon (page 48) with an
approved ribbon.
Torn or damaged forms 1 Reset the forms thickness lever for
thicker paper.
2 Adjust the paper tension horizontally by
moving the right tractor. Too high a paper
tension can cause tearing of the tractor
feed holes.
3 Check the paper slot for foreign material.
4 For thick, multipart forms, set the SET
PLATEN AT BOTTOM OF FORM
parameter to OPEN. (See Chapter 4,
“Configuration Menus,” in the
Setup
Guide.)
Loss of forms position 1 Set the forms thickness lever for thicker
paper.
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