Tektronix Phaser 340 Service Manual page 282

B
Test Patterns
Printers serial numbered BC xxxxx and up.
Service Test Print 4 - Reverse text. This print in
300 dpi indicates if the printhead is outputting
properly-sized drops of ink and that the drum
temperature is not too high.
Look for: Legibility in the lines of 6 point text;
particularly in the primary colors. If the letters are
closed or badly "plugged" with ink, the printhead is
laying down to much ink. In a good print you should
see five vertical parallel lines of different thicknesses
on both the left and right side of the print. If the
thinnest line is missing, the printhead is outputting
too much ink or the drum temperature is too high.
Causes: Check the thermal regulation of the
printhead and of the drum. Make sure that the drum
temperature sensor is correctly mounted and in
proper, even contact with the drum. If necessary,
remove the sensor and check it for an accumulation
of debris at its contact point. Replace the drum
temperature sensor. As a last resort, replace the
printhead.
Note: This print should be made with the printer
covers closed and in place. The heat loss without
the covers can hide the "too-hot" thermal problem.
Printers serial numbered BC xxxxx and up.
Service Test Print 5 - Transparency/manual feed
mode. This print allows you to evaluate
transparency printing as well as manual feeding. It
prints two prints, one with primary color fills and one
with secondary color fills and a band of 50% blue as
this is a popular background for overhead foils.
Look for: Look for uniformity of fill with no
scratching. Evaluate the print on an overhead
projector. Some print artifacts visible on the print do
not show when projected. Likewise, some defects
do not show until projected.
Causes: The ink drops from the jets are traveling in
incorrect trajectories. The printhead is incorrectly
mounted or its printhead-to-drum spacing is
incorrect.
B-8 Phaser 340 Color Printer
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
Thin line
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
missing
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890
8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&*
9100-116
9100-117