Citizen CBM-270 Service Manual page 17

· · · · P P P P N N N N E E E E S S S S e e e e n n n n s s s s o o o o r r r r F F F F a a a a i i i i l l l l u u u u r r r r e e e e
Phenomenon
PNE is always
detected.
PNE is detected even
if there is enough
paper.
PNE is not detected.
· · · · P P P P E E E E S S S S e e e e n n n n s s s s o o o o r r r r F F F F a a a a il il il ilu u u u r r r r e e e e
Phenomenon
PE is always detected.
PE is not detected.
* 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.
Cause
Faulty sensor
Irregularity between
the sensor and printing
paper
Foreign substance
caught by the sensor
Faulty sensor
Foreign substance
caught by the sensor
Sensor exposed to the
direct sunshine
strong light
Cause
Faulty sensor
Faulty sensor
Foreign substance
caught by the sensor
Sensor exposed to the
direct sunshine
strong light
Check Method
Use a tester to check
whether or not a supply
voltage and signal are
normal.
Check whether or not
the printing paper is
aligned with the core,
and whether or not it is
set properly
holder.
Check for any foreign
substance.
---
Check for any foreign
substance.
Check operation,
or avoiding the
sunshine or
light.
Check Method
Use a tester to check
whether or not a supply
voltage and signal are
normal.
---
Check for any foreign
substance.
Check operation,
or avoiding the
sunshine or
light.
17
CBM-270 Service Manual
Repair Method
Replace
sensor.
Set the
paper properly in the
holder.
printing paper with
in the the center.
Remove the foreign
substance.
Replace
sensor.
Remove the foreign
substance.
Use in a place free
direct from the
strong sunshine or strong
light.
Repair Method
Replace the PE sensor.
Replace the PE sensor.
Remove the foreign
substance.
Use in a place free
direct from the
strong sunshine or strong
light.
the PNE
printing
Align the
the PNE
direct
direct
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