Operator Maintenance; In Case Of Power Failure; In Case Of Printer Error; Thermal Printing - Sharp UP-820N Instruction Manual

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Operator Maintenance

In Case of Power Failure

When power is lost, the POS terminal retains its memory
contents and all information on sales entries.
• When power failure is encountered in POS terminal idle state
or during an entry, the POS terminal returns to the normal
state of operation after power recovery.
• When power failure is encountered during a printing cycle, the
POS terminal prints "========" and then carries out the
correct printing procedure after power recovery. (See the
sample print.)

In Case of Printer Error

If the printer runs out of paper, the printer will stall, and "PAPER EMPTY" will appear on the display. Key
entries will not be accepted. Referring to "Installing and Removing the Paper Roll" in this chapter, install a
new paper roll in the proper position, then press the
and resume printing.
If the print head comes up, the printer stalls, and "HEAD UP" will appear on the display. Key entries will not
be accepted. Bring back the print head to the correct position, then press the
the power failure symbol and resume printing.

Thermal Printing

Your POS terminal prints by means of thermal printing. The print head applies heat to thermal paper which
is chemically treated to change color when heated to a certain level. This creates the printed text.

■ Cautions in handling the printer

Printing position
226
Head-up
position
L
key. The printer will print the power failure symbol
• If you are not going to use the POS terminal for an
extended period of time, pull the print head release
lever toward you so that the print head is set apart
from the plate.
L
key. The printer will print