Ricoh Aficio BP20N, Service Manual

Page: 92 / 144

PAPER FEED PROBLEMS
G144/G145 4-18 SM
4.7.4 JAM 2
Description:
1) Paper becomes jammed in front of, or inside, the fusing unit.
2) Paper becomes jammed in the discharge roller and in the fusing unit, after it
passes through the actuator feed.
Cause Solution
1. Jam 2 can appear even if the paper is
completely fed out of the printer. The exit
sensor may be defective. This sensor
should return to its original position, to
close/block the photosensor. It may
remain open due to debris.
2. Paper remains rolled around the hot
roller. The guide claw could be broken or
damaged.
1. Check if the exit sensor or actuator exit is
damaged.
•
Check if burrs appear on the assembly
area of the exit actuator.
•
Check if particles or debris prevent
correct operation of the actuator.
2. Disassemble the fusing unit and remove
the jammed paper. Then, clean the
surface of the pressure roller with dry
gauze. Check all ribs, claws, and springs.
4.7.5 MULTI-FEEDING
Description: Multiple sheets of paper are fed at the same time.
Cause Solution
1. Paper size guides may not be set
correctly (main paper tray unit and by-
pass tray).
2. Solenoid does not operate correctly.
3. Friction pad is contaminated.
4. Paper has a rough surface edge.
1. Adjust the paper guides.
2. Replace the solenoids or PBA.
3. Clean the friction pad with a soft cloth
dampened with isopropyl alcohol or
water.
4. Use paper with a smoother surface.
4.7.6 PAPER ROLLED IN THE FUSING UNIT
Description: Paper remains rolled around the rollers in the fusing unit.
Cause Solution
1. Pressure roller or hot roller may be
contaminated.
2. Ribs, claws, or springs may be damaged
or deformed.
1. Clean the roller surfaces and the area
between the hot roller and thermistor with
isopropyl alcohol or water.
2. Check for damage. Replace the fusing
unit if necessary.