iDP-3221 Service Manual
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21
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CITIZEN
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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.
Faulty mounting or
connection of the con-
trol PCB assy
Check mounting and
connecting conditions of
the control PCB assy.
Mount the control PCB
assy properly.
Faulty mounting of the
platen roller
Check mounting condi-
tion of the platen roller.
Mount the platen roller
properly.
Check mounting and
connecting conditions of
the control PCB assy.
Connect the thermal
head to the control PCB
assy properly.
Faulty mounting or
connection of the ther-
mal head
Check any deformation
or bending of the head
spring.
Replace the deformed
head spring.
Paper feed failure
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.
Foreign substance in
the gear
Remove the platen rol-
ler and check for any
foreign substance
caught in the platen
gear or motor gear.
Eliminate the foreign
substance.
Broken gear
Remove the platen rol-
ler and check for any
breakage of the platen
gear or motor gear.
If the platen gear is
broken, replace it with
new one.
If the motor gear is bro-
ken, replace the motor.
Low DC output voltage
from the AC adapter
Check the DC voltage
with a DC voltmeter.
Supply the specified AC
voltage to the AC
adapter.
Paper is not fed or
fed irregularly
Defective motor
Measure the supply
voltage with a DC volt-
meter or oscilloscope.
If the supply voltage is
normal, replace the mo-
tor (printer mecha-
nism).
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