Citizen PMU2300III Series Service Manual page 38

PMU2300III Series Service Manual
● Printing Failure
Phenomenon
No printing
Part of printing is not
done.
Print is pale.
Print is uneven.
Print is faint.
Cause
The control PCB is faulty.
The thermal head connector
has a bad contact or
connection.
The thermal head is faulty.
The thermal head connector
has a bad contact or
connection.
The thermal head is faulty.
The supply voltage is low.
The thermal head is faulty.
The thermal head has fouling. Check the thermal head for
Paper other than
recommended is used.
The platen roller is not
mounted correctly.
Check Method
−
Check the contact or
connecting condition.
−
Check the contact or
connecting condition.
−
Check the supply voltage
with a tester.
−
fouling.
Check if the paper being
used meets the
specification.
Check the mounting
condition of the platen roller.
- 36 -
Remedies
Replace the control PCB.
Re-insert the thermal head
connector.
Replace the thermal head with
a new one.
Re-insert the thermal head
connector.
Replace the thermal head with
a new one.
Use the printer within the
specified supply voltage
range.
Replace the thermal head with
a new one.
Remove fouling using ethyl
alcohol soaked cotton swab or
soft cloth.
Replace it with the specified
paper.
Mount the platen roller
correctly.