Symbol PTC-870IM, Руководство пользователя

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Parts
6
Figures 1 through 3 on pages 23 to 25 show and
describe the external parts of the PTC-870IM. The
parts listed on pages 20 through
22 are not shown in
any of the figures.
Bridge battery
An internal rechargeable nickel-cadmium bridge
battery provides power to protect data stored in the
PTC’s RAM memory if the unit is disconnected from
AC or vehicle power. The bridge battery can protect
the PTC’s memory for at least 60 hours, depending on
the memory’s size. It is recharged automatically while
the unit is receiving power.
The bridge battery’s condition is checked every time
the PTC is turned on. If bridge battery power is low,
the PTC beeps five times. If you hear these beeps or
if the PTC has been disconnected from AC or vehicle
power for over 60 hours, reconnect the power and
allow the bridge battery to recharge for 10 to 12 hours.
The bridge battery is not user replaceable. When the
bridge battery no longer holds a charge, send your
PTC to an authorized Telxon service center to have
the bridge battery replaced. The center will insert a
new bridge battery into your PTC and follow the
proper procedure to recycle the failed battery.
Flash EPROMs
Flash EPROMs are electronic chips installed inside
the PTC. In the PTC-870IM, they hold the operating
system, device and utility programs, and perhaps
your application program. If your PTC has an
20