Tektronix PHASER 560 Service Manual page 222

B
Test Prints
B-8 Phaser 560 Color Printer
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Interpreting Service Print 2
Service Print 2 is useful for evaluating the condition of the
imaging unit. Three prints are made: a 600 dpi print, a solid red
fill print, and a 1200 dpi print.
With a properly functioning imaging unit and printer, you should
see the following:
1. Diagonal lines. These two lines should be smooth and
unbroken.
2. Crosshairs. A thin white crosshair should be visible in each
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block square. As the photoconductive belt ages and fatigues,
the crosshair in the top box will disappear followed in time by
the lower crosshairs. The belt may "rejuvenate" after a few
hours of non-use, but this will only last for a few prints before
fatigue sets in again.
3. Fine parallel lines. Distinct parallel lines, both horizontal and
vertical, should be viewable. No mottling or blending should be
seen. All vertical lines should be identical in appearance and
thickness to their horizontal counterparts.
4. 2 pt. text. The 2 point text, the smallest printed on the test
print, should be easily readable.
5. Registration. Thin horizontal composite black lines will show
misconvergence if each pass of the accumulator belt does not
properly register with each pass of the photoconductive belt.
6. Blended fills. The fills should be smooth and even in both the
primary and secondary color fills.
Interpreting Service Print 2's solid red fill print
The second of the three prints made when Service Print 2 is
selected is a solid red fill. Its purpose is to reveal repeating
defects that can be traced back to defects on the printers belts or
rollers.
1. Look for repeating defects inline down the print.
Refer to the topic "Repeated spots or lines on print in-line with
each other" on page 6-24. It discusses causes of repeated
spots based on the distance between the spots.
In some instances, the spots may be dark instead of white. They
may also be shaped something other than round.