HP 2566C - Manual (Page 89)

Optimizing Print
Quality
There are two printer controls that are used to achieve the best print
quality from your printer: the vertical paper tension lever (Figure 6-4,
A, page 6-9) and the forms thickness adjustment lever (Figure 6-5, page
6
-
10
).
To adjust the printer for optimum print quality:
1. Adjust the vertical tension.
With the swing-gate open and paper loaded, pull out the spring
plunger knob and move the vertical paper tension lever downward
until the paper is slightly taut against the platen. Insert the plunger
into the selected slot. (The platen is the curved black surface lying
between the upper and lower tractors.) Place your hand on the paper
in the region of the platen and gently push the paper up and down.
If the paper has significant freedom to move, the vertical tension is
still too loose. When the tension is correct, there will be no vertical
looseness.
2. Form feed the paper through the tractors.
With the printer “off-line,” press the
[ form feed )
key two or
three times to ensure that the paper moves freely over the platen.
Excessive paper tension causes the tractor holes in the paper to
stretch and extreme tension causes a paper jam. If either of these
conditions happen, pull out the spring plunger knob and lift the
vertical paper tension lever one position at a time, pressing the
[ form feed !
key each time to check the tension.
N o t e J If the vertical paper tension lever is not adjusted correctly, коте
characters such as O’s, and E’s may appear squashed or flattened at the
top. This may appear very evident especially when using heavy paper
or 6-part forms. (See page 7-4 for an example of Character Scrunch).
Proper acyustment of the lever solves this problem.
For normal print:
1. Rim sub-test 15.
Close the swing-gate and run sub-test 15; a set of vertical and
horizontal lines (see page 5-8 for sub-test procedure).
6-14 USING THE PRINTER