Citizen CBM1000 Service Manual page 22

• Paper feed failure
Phenomenon
Paper is not fed or fed
irregularly
Cause
Faulty connection of the
motor connector
Defective motor
Faulty DC output voltage
from the AC adapter
Low DC output voltage
from the AC adapter
Faulty control PCB assy
Faulty mounting of the
platen roller
Paper feed failure
Foreign substance in the
gear
Broken gear
Check Method
Check connection of the
motor connector.
Measure the supply voltage
with a DC voltmeter or
oscilloscope.
Check whether the
specified AC adapter is
used.
Check the DC voltage with
a DC voltmeter.
Check mounting condition
of the platen roller.
Check whether or not the
paper is jamming or torn
and caught in the paper
path.
Remove the gear holder and
check for any foreign
substance caught in the
gears.
Remove the gear holder and
check for any breakage of
the gears.
18
CBM1000 TYPE II Service Manual
Remedy
Connect the connector
correctly.
If the supply voltage is
normal, replace the motor.
Use the specified AC
adapter.
Supply the specified AC
voltage to the AC adapter.
Replace the control PCB
assy.
Mount the platen roller
properly.
Eliminate unnecessary
paper in the paper path and
set paper properly.
Eliminate the foreign
substance.
If the gear is broken,
replace it with new one.