In Case Of Power Failure; Before Calling For Service - Sharp ER-A770 Instruction Manual

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.

Before Calling for Service

The malfunctions shown in the left-hand column below, labeled "Fault," do not necessarily indicate
functional faults of the machine. It is therefore advisable to refer to the "Checking" shown in the right-hand
column before calling for service.
• The display does not illuminate.
• The display is illuminated, but the whole machine
refuses entries.
• No receipt is issued.
• No journal paper is taken up.
• Printing is unusual.
Fault Checking
• Is power supplied to the electric outlet?
• Is the power cord plug out or loosely connected to
the electrical outlet?
• Is the power switch in the "ON" position?
• Are the brightness control and the contrast control
adjusted correctly?
• Is the terminal in screen-save mode?
• Is the clerk key inserted?
• See the printer manual.
237