UP-800 (serv.man17). for spare part numbers refer to the seperate parts guide manual. - Sharp ECR Service Manual (repair manual). Page 14

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5-3
LT-1320CS
Symptom
Cause
Check
Countermeasure
Check connector contact con-
dition.
Use tester or oscilloscope to
measure power supply voltage.
Use tester or oscilloscope to
check lead wires in motor
assembly for continuity.
Use tester or oscilloscope to
measure power supply voltage.
Check the paper path for jam-
med or broken paper.
Remove gear cover and inspect
gear train.
Remove gear cover and inspect
gear train.
Use tester or oscilloscope to
measure power supply voltage.
Check connector contact con-
dition.
-
Check connector contact con-
dition.
-
Ensure that connector is
correctly seated and gives
proper contact.
Repair power supply circuit
to provide rated voltage.
Replace printer unit.
Replace printer unit.
Remove obstacles and set
the paper up correctly.
Remove any foreign object.
Replace printer unit.
Replace printer unit.
Ensure that connector is
correctly seated and gives
proper contact.
Replace printer unit.
Ensure that connector is
correctly seated and gives
proper contact.
Replace printer unit.
Paper feed motor
does not operate
or operates erra-
tically.
Paper is not being
transported
Paper absence or
presence is not
detected correctly.
Head down con-
dition is not de-
tected.
Motor connector faulty.
Motor is not powered correctly.
Lead wire inside motor assembly
is broken.
Motor is defective.
Problem in paper feed path.
Gear jammed by foreign object.
Gear is broken.
Motor is defective.
Sensor connector faulty.
Paper sensor is defective.
Sensor connector faulty.
Head up sensor is defective.
Paper
feed
problem
Sensor
problem
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