iDP-3221 Service Manual
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CITIZEN
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Phenomenon
Cause
Check Method
Remedy
Faulty paper sensor
Replace the thermal
head assy and check if
the replaced one func-
tions properly.
Check whether the ER-
ROR lamp flickers
when paper is out.
Replace the thermal
head assy.
Does not detect
presence of paper.
Foreign substance, etc.
caught by the sensor
Check for any foreign
substance.
Eliminate the foreign
substance.
Faulty paper near-end
sensor
Replace the paper near-
end sensor.
Faulty connection of the
paper near-end sensor
connector
Check connection of the
paper near-end sensor
connector.
Connect the connector
correctly.
Does not detect
paper near-end
status.
Foreign substance is
attached to the paper
near-end sensor.
Check whether any for-
eign substances are
adhered to the paper
near-end sensor.
Remove the foreign
substance.
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Phenomenon
Cause
Check Method
Remedy
Faulty connection of the
motor connector
Check connection of the
motor connector.
Connect the connector
correctly.
Faulty DC output volt-
age from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Defective motor
Measure the supply
voltage with a DC volt-
meter or oscilloscope.
If the supply voltage is
normal, replace the mo-
tor (auto cutter).
The cutter does not
function
Paper feed failure
(Paper jam)
Check whether or not
the paper is jamming or
torn and caught in the
paper path.
Eliminate unnecessary
paper in the paper path
and set paper properly.
¨
If the no-paper condition is not detected while the printer is running out of the recording paper, it
will print without the paper, leading to a trouble of the head, and so on.
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