Ricoh MP C307 Field Service Manual page 515

Troubleshooting Guide
Symptom
All the paper is black.
Missing CMY Color
Symptom
C, M, or Y is
missing.
Light Print
Symptom
Printed images are
too weak.
Repeated Spots or Lines on Prints
The same spots or lines appear at regular intervals.
Interval
At intervals of 33.6 mm (1.32 inches)
At intervals of 20.9 mm (0.82 inches)
At intervals from 55.0 (end) to 55.4 (center) mm
(from 2.16 to 2.18 inches)
Possible cause
Incorrectly installed PCDU
Defective PCDU
Defective HVPS
Defective laser unit
Defective BiCU
Defective main board
Possible cause
Defective PCDU
Loose connection between printer cartridge and
BiCU
Image transfer belt not contacting PCDU
Defective the drum motor: CMY
Defective BiCU
Possible cause
Loose connection between paper
transfer roller and HVPS
Dust in the laser beam path
Image transfer belt not contacting
PCDU
Defective PCDU
Defective paper transfer roller
Defective fusing unit
Defective BiCU
Install the PCDU correctly.
Replace the PCDU.
Replace the HVPS.
Replace the laser unit.
Replace the BiCU.
Replace the main board.
Check the connection between the paper
transfer roller and the HVPS.
Clean the laser beam path.
Check the image transfer belt unit.
Replace the PCDU.
Repair the paper transfer roller.
Replace the fusing unit.
Replace the BiCU.
Possible cause
Defective charge roller
Defective development
roller
Defective paper transfer
roller
Necessary actions
Necessary actions
Replace the PCDU.
Replace the drum positioning
cover.
Check the belt tension unit.
Replace the drum motor: CMY.
Replace the BiCU.
Necessary actions
Necessary actions
Replace the PCDU.
Replace the PCDU.
Replace the paper transfer
roller unit.
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