Citizen PMU2300III, Service Manual

Page: 38 / 68

PMU2300III Series Service Manual
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● Printing Failure
Phenomenon Cause Check Method Remedies
The control PCB is faulty.
−
Replace the control PCB.
The thermal head connector
has a bad contact or
connection. Check the contact or
connecting condition. Re-insert the thermal head
connector.
No printing
The thermal head is faulty.
−
Replace the thermal head with
a new one.
The thermal head connector
has a bad contact or
connection. Check the contact or
connecting condition. Re-insert the thermal head
connector. Part of printing is not
done.
The thermal head is faulty.
−
Replace the thermal head with
a new one.
The supply voltage is low. Check the supply voltage
with a tester. Use the printer within the
specified supply voltage
range.
The thermal head is faulty.
−
Replace the thermal head with
a new one.
The thermal head has fouling. Check the thermal head for
fouling.
Remove fouling using ethyl
alcohol soaked cotton swab or
soft cloth.
Paper other than
recommended is used. Check if the paper being
used meets the
specification. Replace it with the specified
paper.
Print is pale.
Print is uneven.
Print is faint.
The platen roller is not
mounted correctly. Check the mounting
condition of the platen roller. Mount the platen roller
correctly.