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Confidential
4.2.5 Problems Encountered Frequently in the Past
This section lists the three problems most frequently encountered during on-site service in the
past.
- Paper jams
- Ink-related problems
- Auto document feeder (ADF) failure
[ 1 ] Paper jams
A paper jam may occur not only due to machine malfunction but also to the user's actions.
NOTE: In some cases, foreign material that has found its way into the machine without the user
realizing can be the cause of a paper jam. Instruct the user to place nothing on top of the
machine that might fall into it.
NOTE: When removing foreign materials from the machine, take special care not to
contaminate or scratch the CR encoder strip. If the encoder strip is contaminated or scratched,
replace it. (Refer to Chapter 6, Section 6.1.11.)
NOTE: After removing jammed paper from the machine, be sure to check that no fragment of
paper remains in the machine.
Problems due to the user's actions
Problems due to machine malfunction
Check Possible causes Problems that may result
Recording paper Paper not suited to use with the machine
was used.
Paper with labels attached, for
example, may leave labels inside
the machine.
For foreign materials Fragments of paper that were left behind
when previous paper jams occurred.
Foreign materials such as tacks have
found their way into the machine.
Foreign materials can hinder the
paper feed.
Check Possible causes Problems that may result
Star wheels on star
wheel holder
Star wheels became dislocated when
paper jam occurred.
Dislocated star wheels can hinder
paper feed.
Sensors and actuators Any sensor(s) not working. If a sensor does not turn on, the
related roller(s) will not rotate.
Bank ASSY The bank ASSY is deformed. A deformed section on the bank
ASSY can cause double-feeding.
CR encoder strip The CR encoder strip is stained. A stained CR encoder strip can
cause a carriage drive error during
printing that will stop the printing
operation.
Bank ASSY
Paper tray
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