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4-7
LCD indication Description Corrective actions
ROM Err ROM checksum error Turn off the power and reset the printer. If this
recurs, contact our service personnel.
RAM Err RAM checksum error Turn off the power and reset the printer. If this
recurs, contact our service personnel.
– – System error (such as
timer or CPU running
out of control).
System is protected
and the printer is reset
First protect the system, then reset the printer.
4.2 Power Troubleshooting
Problem Cause and remedy
No power even with
power switch turned ON.
• Power cord is not
properly connected to the
outlet.
• Power cord is not
properly connected to the
power inlet.
• Input voltage is not
correct; input voltage is
greater or less than the
rated voltage.
• Proper RS-232C cable is
not used.
→ Turn off the power switch and
properly reconnect the power
cord to the outlet.
→ Turn off the power switch and
properly reconnect the power
cord to the power inlet.
→ Set input voltage within the
rated voltage (puncture voltage
may occur. Contact our service
personnel).
→ Turn off the power switch and
unplug the interface cable.
Check that power is delivered by
turning on the power switch and
use the proper RS-232C cable.