BTP-L540 User’s Manual
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Troubleshooting methods:
Error LED
status
Reason analysis
Solutions
Print head up
Print head is lifted up.
Please press down the print head.
The micro switch has a
failure.
Contact the maintainer.
Paper end
Paper roll is used up or
no paper roll is installed.
Install a paper roll.
Paper jam
Clear the paper jam.
Paper roll surface is
dirty or damaged.
Please skip the dirty or damaged
part.
Paper roll breaks away
from the mark sensor.
Install a paper roll again.
The surface of mark
sensor is dirty.
Clean mark sensor surface.
The position of reflective
sensor is not correct.
Adjust the sensor position
according to the description in 3.4.
Paper roll type does not
match with mark sensor
type.
Set the paper type in printer driver
to make it consistent with actual
paper type.
Print head
temperature
abnormal
Operating environment
temperature is too high,
causing overheating
print head.
Please improve ventilation
condition. The printer can return to
normal with the fall of temperature.
Print darkness is too
high.
Lower the print darkness properly.
Paper is jammed in the
path, causing heat
accumulation and
Clear paper jam. Check if the print
head test pattern is normal or not
after the temperature of print head
