Service manual

CBM-270 Service Manual
17 CITIZEN
·
··
·
P
PP
PN
NN
NE
E E
E S
SS
Se
ee
en
nn
ns
ss
so
oo
or
r r
r F
FF
Fa
aa
ai
ii
il
ll
lu
uu
ur
rr
re
ee
e
Phenomenon Cause Check Method Repair Method
PNE is always
detected.
Faulty sensor Use a tester to check
whether or not a supply
voltage and signal are
normal.
Replace the PNE
sensor.
Irregularity between
the sensor and printing
paper
Check whether or not
the printing paper is
aligned with the core,
and whether or not it is
set properly in the
holder.
Set the printing
paper properly in the
holder. Align the
printing paper with
the center.
PNE is detected even
if there is enough
paper.
Foreign substance
caught by the sensor
Check for any foreign
substance.
Remove the foreign
substance.
Faulty sensor
---
Replace the PNE
sensor.
Foreign substance
caught by the sensor
Check for any foreign
substance.
Remove the foreign
substance.
PNE is not detected.
Sensor exposed to the
direct sunshine or
strong light
Check operation,
avoiding the direct
sunshine or strong
light.
Use in a place free
from the direct
sunshine or strong
light.
·
··
·
P
PP
PE
E E
E S
SS
Se
ee
en
nn
ns
ss
so
oo
or
r r
r F
FF
Fa
aa
ail
ilil
ilu
uu
ur
rr
re
ee
e
Phenomenon Cause Check Method Repair Method
PE is always detected. Faulty sensor Use a tester to check
whether or not a supply
voltage and signal are
normal.
Replace the PE sensor.
Faulty sensor
---
Replace the PE sensor.
Foreign substance
caught by the sensor
Check for any foreign
substance.
Remove the foreign
substance.
PE is not detected.
Sensor exposed to the
direct sunshine or
strong light
Check operation,
avoiding the direct
sunshine or strong
light.
Use in a place free
from the direct
sunshine or strong
light.
*
If PE is not detected with no printing paper set, the printer will print even if the paper is not set,
causing a trouble to the printer head, etc. If printing is performed in this condition, replace the
platen roller and head.