Tally T6090, Maintenace Manual

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2–7
Chapter 2: Menu Operations
Plot Parameter (Menu Level 2)
This parameter is available in Tech Access only and it contains selections of plot patterns used
to test such things as hammer ball alignment and dot placement. There are five selections for
this parameter.
Plot selections (Menu Level 3)
After you have started one of the tests below, it will run continuously until you depress either
the ENTER Key or the CLEAR Key.
Grid This option prints a grid pattern that can be used to check hammer ball alignment.
Cross This option prints a crosshatch pattern of diagonal lines that can be used to check
linearity of dot placement.
Gray This option prints a grayscale pattern at 60 by 72 DPI. This test fires all 66
hammers (printing every other dot vertically and horizontally), which should lay
down an even gray tone across the page. Any changes in the gray tone indicates a
variation in the gap between the hammer module and the platen, most commonly
indicating either a worn hammer module or a replacement module in need of
alignment.
Black This option prints a solid black page at 60 by 72 DPI matrix. The Black Page
Print Mode is the most dense print test that can be run for verifying the proper
operation of the printer’s power supply. This test places the greatest electrical
current load on the power supply as well as increasing the thermal load on the
electronics.
Block This option prints alternating bars at 60 by 72 DPI matrix. Each bar is offset from
the previous bar in order to check on dot placement. This pattern is used to test
the printer at its maximum sustainable graphics rate without exceeding the bound-
aries of thermal change or electrical current overload. This test is useful in
examining the capabilities of the print mechanism, for checking proper hammer
alignment/spacing, and print quality. The output in the printed areas should have
uniform shading. If not, parameters such as individual hammer module heights
and alignments should be checked.