Service manual

CBM-270 Service Manual
16 CITIZEN
Phenomenon Cause Check Method Repair Method
Faulty power supply
Check whether or not
the specified AC adapter
is used.
Use the specified
AC adapter.
Too much ink blot
Foreign substance
adhered to the thermal
head or platen roller
Check the thermal
head and platen roller
for any adhered foreign
substance.
Dip a cotton swab or
soft cloth in ethyl
alcohol and wipe off
the foreign substance.
Faulty printing paper Check whether or not
the specified printing
paper is used.
Replace with the
recommended paper
or its equivalent.
Blurred characters
Worn platen roller The platen roller is
worn out and slips
easily.
Replace the platen
roller unit.
*
If the printer continues to print for a long time, the printed characters become thicker. If
printing is suspended and restarted, print concentration will change slightly. Print
concentration becomes lower if used at a low temperature.
·
··
·
P
PP
Pa
aa
ap
pp
pe
ee
er
r r
r F
FF
Fe
ee
ee
ee
ed
d d
d F
FF
Fa
aa
ail
ilil
ilu
uu
ur
rr
re
ee
e
Phenomenon Cause Check Method Repair Method
Faulty connection of
motor connector
Check the motor
connector for its
connection.
Connect the
connector properly.
Faulty power supply Check whether or not
the specified
AC adapter is used.
Use the specified
AC adapter.
A printing paper feed
motor does not work or
malfunctions.
Faulty motor body Use a tester or
oscilloscope to measure
a supply voltage and
waveform.
If the supply voltage
and waveform are
normal, replace the
motor (printer
mechanism).
Faulty paper feed Check whether or not
the printing paper is
jamming or torn and
caught in a paper path.
Remove unnecessary
printing paper and
set properly.
Foreign substance in
the gear
Check the motor gear
for any foreign
substance.
Remove the foreign
substance.
Broken gear Check whether or not
the motor gear is
broken.
Replace the motor
(printer mechanism).
The printing paper is
not fed or fed
irregularly.
Faulty motor body Use a tester or
oscilloscope to measure
a supply voltage and
waveform.
If the supply voltage
and waveform are
normal, replace the
motor (printer
mechanism).