Citizen iDP3550 Service Manual page 18

• Faulty carriage mechanism
Phenomenon
Abnormal sound
ERROR lamp
illuminated
Shear in printing
Cause
Faulty connection of the
head connector
The print head does not
move to the home position
at power-on, or it does not
move.
The paper is jamming.
Faulty AC supply voltage
Foreign substance in the
gear
Broken gear
Check Method
Check the connection of
the head connector.
Check for any foreign
substance within a movable
range or any wear of the
gear, etc.
Turn off the power once,
and then on it again.
Check whether the
specified AC voltage is
supplied with an AC
voltmeter.
Remove the printer
mechanism and check for
any foreign substance
caught in the gear, head
motor gear, or print head
moving part.
Remove the printer
mechanism and check for
any breakage of the gear,
head motor gear, or print
head moving part.
14
iDP3550/3551 Service Manual
Remedy
Connect the connector
properly.
Replace the print head or
printer mechanism.
If there is a shear in
printing, replace the printer
mechanism.
Use the specified AC
voltage.
Eliminate the foreign
substance.
If broken, replace the
printer mechanism.
CITIZEN