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8. Fault diagnosis
Fault phenomenon
Printer only feeds
paper during printing,
and has no printing
data.
Printer prints blurrily
Printed receipt
characters become
fuzzy within several
months or even
several weeks.
Fault reason
Printing paper is
installed upside down.
Printer movement is
polluted due to
long-term not being
cleaned.
Printing paper
coloration is not good.
Printing paper quality is
not good.
Preservation
temperature of receipt
is too high.
19
Solution
Change printing
paper installation
direction.
Movement needs to
be cleaned.
Please set higher
blackness or use
printing paper with
better coloration.
Please use thermal
printing paper with
long retention
period.
Please preserve
under normal
temperature (about
20 °C)
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