Tektronix Phaser 600, Руководство по обслуживанию

Страница: 270 / 286

9-28
Phaser 600 Color Printer
9
Checks and Adjustments
Temperature offset adjustment
The temperature setting for each printhead is set at the factory. The printer gives
you the means to slightly raise or lower this value, if necessary. In rare cases,
you may do this to correct certain printing artifacts that may occur as the
printhead ages. The default temperature offset value is 0.
There are separate temperature offset settings for both Standard mode and
Enhanced mode printing. The adjust procedure is the same for each mode.
Scroll to the
Head Temp Adjust
menu item to alter the Standard mode
temperature adjustment. Scroll to the
Enh Head Temp Adjust
menu item to
alter the Enhanced mode temperature adjustment. Generally, the offset value
will be the same for both Standard and Enhanced mode printing.
1.
Power up the printer to its ready state.
2. Scroll to and enter the Extended Service Support menu and then scroll
to the
Test Print
menu item. Press
Print
to print a print quality
check test print so you can determine if a temperature change is
required.
3. Examine the test pattern. If the solid fill appears to be well-filled with
even density and the 8.5 kHz manifold parallel line laydown is
composed of even lines, then the printhead temperature is correct.
Go to Step 7.
4. If the solid fill is appears well-filled and even, but the 8.5 kHz pattern
is composed of uneven lines that appear to jump in and out of
neighboring lines (this is called lane-changing) and feature lines that
end with a trailing edge that deflects up or down, then the printhead
temperature is too hot and must be lowered. If the lines appear to be
broken with small gaps, then the printhead temperature is too low
and must be raised.
5.
Scroll to and enter the Extended Service Support menu and then
scroll to the Standard
Head Temp
or the
Enhanced Head Temp
menu. It displays the currently set value b6 and -6; 0 is the
default value.
a.
Press the arrow keys to scroll through the values.
b. Then press
Select
to save the desired value.
6. Make another test print and, if necessary, repeat the value change until
the 8.5 kHz pattern is correct.
7.
Since changing the printhead temperature alters the viscosity of the
ink, its travel time from the jet nozzle to the paper is changed.
Proceed to the convergence adjustment earlier in this procedure to
ensure that bi-directional printing is correct.