Citizen PMU2300III Series Service Manual page 39

● Indication Failure (Bezel)
Phenomenon
The LED does not light
up.
(PB or SB specification)
The LED does not go off.
(SB specification)
● Paper Feed Failure
Phenomenon
Paper is not fed.
Paper feed is not
straight.
The platen is opened.
Paper cannot be fed at
the presenter.
A presenter error occurs.
Cause
Incorrect memory switch
setting
The PCB of "SA, BOARD
BEZEL" is faulty.
The LED or PCB is faulty.
The connector has a bad
connection.
The PCB of "SA, BOARD
BEZEL" is faulty.
"FLAG, SENSOR" is caught in
the upper position and cannot
be returned.
Cause
The motor connector has a
bad connection.
The motor is faulty.
The supply voltage is low.
The control PCB is faulty.
The platen roller is not
mounted correctly.
Paper feed is faulty.
Foreign substances are stuck
in the gear.
A gear is broken.
PMU2300III Series Service Manual
Check Method
Check the setting of
MSW12.
The LED does not light up
even when paper exists at
"FLAG, SENSOR".
−
Check the condition of
CN503.
The LED does not go off
even when paper does not
exist at "FLAG, SENSOR".
Operation of "SPRING,
FLAG" is faulty, or a foreign
object is caught in it.
Check Method
Check the connecting
condition of the connector.
(CN103, CN501)
Measure the supply voltage
with a tester or oscilloscope.
Check the supply voltage
with a tester.
−
Check the mounting
condition of the platen roller.
Check if paper is jammed,
torn or caught in the paper
path.
Remove the gear holder and
check the gear for any
foreign substance or
breakage.
- 37 -
Remedies
Set MSW12 correctly.
Replace "SA, BOARD
BEZEL".
Replace "SA, BOARD LED".
Connect the connector
correctly.
Replace the PCB.
Replace "SPRING, FLAG".
Remove the foreign object.
Remedies
Connect the connector
correctly.
Replace "UNIT, MECHANISM"
or "MOTOR, PRESENTER".
Use the printer within the
specified supply voltage
range.
Replace the control PCB.
Mount the platen roller
correctly.
Remove unnecessary paper
and set the paper correctly.
Eliminate foreign substance.
If any gear is broken, replace it
with a new one.