All H's; All E's + Ff; Underlines; Printer Information Menu - IBM 6400-D Generation II Series Setup Manual

All H's

All H's
A pattern of all uppercase H's used to detect missing characters, misplaced
dots, smeared characters, or improper phasing.

All E's + FF

A pattern of all E's repeated for ten lines and followed by a form feed to the
next page top-of-form, used to identify paper motion or feeding problems,
such as paper path obstruction or improper forms.

Underlines

An underline pattern useful for identifying hammer bank misalignment.

Printer Information Menu

Printer Information
from page 92

Installed Memory

Power On Time Printing Time Print Strokes
11 Inch Pages
Figure 64. Printer Information Menu
You can view various printer statistics, such as hours of usage, and refer to
these figures for preventive maintenance purposes. Printer statistics
accumulate continuously; they do not reset when you power off the printer.
All of the printer statistics are set to zero at the factory after burn–in testing.
Installed Memory
Displays the amount of RAM installed in the printer in megabytes.

Power-on Time:

The cumulative time in hours the printer has been powered on. The range is 0
through 30,000 hours.
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