iDP-3221 Service Manual
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CITIZEN
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Phenomenon
Cause
Check Method
Remedy
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
connection of the con-
trol PCB assy.
Mount the control PCB
assy properly.
Check mounting condi-
tion of the platen roller.
Mount the platen roller
properly.
Faulty mounting of the
platen roller
Check any deformation
or bending of the head
spring.
Replace the deformed
head spring.
No printing
Faulty thermal head
unit
Replace the thermal
head unit.
Faulty DC output volt-
age from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Non-recommended pa-
per is used.
Replace it with the
specified paper.
Faulty thermal head
unit
Replace the thermal
head unit.
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.
Paint printout
Foreign substance is
adhered to the thermal
head.
Check whether any for-
eign substances are
adhered to the thermal
head.
Dip a cotton swab or
soft cloth in ethyl alco-
hol and wipe the foreign
substances with them.
Faulty DC output volt-
age from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Badly blurred
printout
Foreign substance is
attached to the print
head.
Check whether any for-
eign substances are
adhered to the thermal
head.
Dip a cotton swab or
soft cloth in ethyl alco-
hol and wipe away the
foreign substance.
Faulty paper
Check whether the pa-
per meets the specifica-
tions.
Replace it with the
specified paper.
Bad printing qual-
ity
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.
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