Ricoh DD 5450, Field Service Manual, Page: 274 / 403

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Chapter 7 Troubleshooting Guide
1
(17) Paper Jams in the Paper Eject Side
Causes Symptoms Countermeasure
Printing paper not
suitable
• If paper is too thin, it will stick to drum and
scrunch up.
• If grain of paper is sideways relative to transfer
direction, paper will crunch up, or jam on the
print tray.
• If paper curls upward, it will likely scrunch up.
If curls downward, it will likely jam on the print
tray.
Explain causes to user. Have user
change to the paper conforming to
specifications.
Image of document • If set-solid exists near leading edge of paper,
paper will likely scrunch up.
• If set-solid exists on one side of paper, paper
will not be ejected in a straight line. As a result,
ejected paper will be disorderly piled and likely
jam on the print tray.
• Adjust leading edge margin to
about 10 mm. (Too long margin
will cause adverse results.)
• Explain causes to users. If
possible, have user change
position for set-solid.
Static electricity • If ambient air is dry, static electricity may cause
disordered piles or scrunch-up of paper.
• Explain to users. Have user
desist from excessive use of A/C
or heating.
• If possible, have user take anti-
dryness measures including
humidifiers
Leading edge margin • If leading edge margin is not correct, scrunch-
up of paper will likely result.
IMPORTANT:
Scrunch-up of paper may also result if the
margin is too long.
Perform vertical reg. center sensor
adjustment.
Timing roller clutch • Any slippage of the timing roller clutch will
reduce feed amount and eliminate leading edge
margin. This results in paper scrunch-up.
Replace the timing roller clutch.
Paper stripper finger • If timing is too low, or the gap between the
drum and the leading edge of paper is too
large, paper stripper finger will not enter into
the gap, causing paper scrunch-up.
Perform paper stripper finger unit
gap adjustment.
Air • If sufficient air is not delivered from the tip
of the paper stripper finger, it will not lift the
leading edge of paper off drum. Scrunch-up of
paper will result.
• Check if the hole in the fingers
tip is blocked by foreign object.
• Check pipes for kinks or
disconnections.
• Check valves and O-rings on the
air pump.
Ink • Too much ink transferred to paper will likely
cause scrunch-up of paper.
• Perform ink volume adjustment
of drum.
• Explain user that ink transfer
volume increases immediately
after paper scrunch-up, and
advise user to restart printing at
standard speed.
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