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Terminal Maintenance
PREVENTIVE MAINTENANCE
Two simple procedures which you may do to help ensure the proper operation of your termi-
nal are (1) annually replacing the battery that protects non-volatile memory and (2) keeping
the screen and keyboard clean.
Cleaning The Screen And Keyboard
You should regularly clean your terminal to remove dust and grease. First, dust lightly using
a damp, lint-free cloth. (Paper towels are fine.) The cloth should be just damp enough to pick
up dust. Avoid wiping dust or lint into the keyboard area.
If smudges or fingerprints persist, you can use a mild solution of soap and water. Remember
to wring the cloth thoroughly; otherwise, rubbing the dirty areas will drip water over the
terminal. Avoid getting any liquid between the keys.
CAUTION: Never use petroleum-based cleaners, such as lighter fluid, or cleaners contain-
ing benzene, trichloroethylene, dilute ammonia, ammonia, or acetone. These
cleaners may harm the plastic surfaces.
Protecting Non-Volatile Memory
NON-VOLATILE MEMORY. Display memory is volatile memory; that is, it loses stored
information upon power failure. Non-volatile memory is a battery-maintained portion of
RAM memory that stores configuration parameters. Without the battery power supply, this
information would also be lost whenever power to the terminal is turned off.
BATTERY REPLACEMENT. To safeguard non-volatile memory, you should replace the
battery every 12 months. You can obtain a new battery through commercial outlets by
requesting a Mallory Battery, Type TR133. Alternatively, you can order batteries through
your local HP Sales and Service Office by using the following name and part number:
Terminal Battery, HP Part No. 1420-0259
By leaving the terminal powered on, configuration data should be protected when you replace
an old battery. However, because bumping the terminals could accidentally jar the battery loose,
it is advisable to keep a record of the terminal's configuration menus. Since you can copy the
screen's display to a printer (either external or integral), it is a simple task to display each
menu then copy it.
11-5
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