Ricoh SP C440dn, Field Service Manual, Page: 619 / 654

Troubleshooting Guide
• Remove the NVRAM from the original engine control board and install it on the new one when you
replace the engine control board.
Blank Print
Symptom Possible cause Necessary actions
No image is printed. Defective laser unit Replace the laser unit.
Defective PCDU Replace the PCDU.
Defective image transfer belt
unit Replace the image transfer belt
unit.
Incorrect action of paper
transfer roller Check the guide and the paper
transfer roller.
Defective HVPS Replace HVPS.
Defective BCU Replace the BCU.
All-black Print
Symptom Possible cause Necessary actions
All the paper is black. Incorrectly installed PCDU Install the PCDU correctly.
Defective PCDU Replace the PCDU.
Defective HVPS Replace HVPS.
Defective laser unit Replace the laser unit.
Defective BCU Replace the BCU.
Defective main board Replace the main board.
Troubleshooting Guide
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