Ricoh DD 5450, Field Service Manual, Page: 273 / 403

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Chapter 7 Troubleshooting Guide
1
(16) Paper Jams in the Paper Feed Side
Causes Symptoms Countermeasure
Printing paper not
suitable
• If paper is too thick, it won't be likely fed. If too
thin, double sheets may be fed.
• Paper not clearly cut: 2 sheets adhere to each
other.
• Much paper scraps may deteriorate the paper
feed roller and separator performance.
Explain causes to user. Have user
change to the paper conforming to
specifications.
Dirt / foreign object on
transfer path
• Paper gets stuck in transfer path, causing
creasing and tearing.
Remove any dirt or foreign object.
Incorrect paper feed
pressure
• If pressure on paper is insufficient, paper will
not be fed.
• If pressure on paper is excessive, double
sheets will be fed.
Explain to users how to select
correct pressure for paper.
Paper feed roller wear • Paper may not be fed. Replace paper feed roller.
Paper separator unit
gap
• If gap is too large, separator unit will rattle in
direction of paper transfer path, causing double
sheets to be fed.
• If gap is too small, paper separator unit cannot
follow angle change due to paper feed shaft
up-down movement, which may cause double-
sheet or slanted feed, and creasing.
Perform paper separator unit gap
adjustment.
Paper separator unit • Wear or adhesion of paper scraps causes
deterioration in separating performance,
resulting in double-sheet feed.
Clean separating surfaces.
If any trouble exists, replace the
unit.
Perform separator unit gap
adjustment on a new unit.
Separation pressure • If pressure is very low, no paper will be fed. Perform separation pressure
check.
Elevator top position
limit
• Paper slant is large, causing creases.
• During printing, paper feed errors often occur
immediately before or after paper feed tray
rises.
Perform elevator top limit sensor
adjustment.
→See page 235
→See page 235