Troubleshooting
SC500: Feed, Transport, Duplex, and Fusing
Confirm failure to feed
Web drive gears 
Web motor
IOB connections
IOB
Web motor harnesses
Paper exit unit harnessesSC542 Fusing warm-up error 1: Center thermistor
AC control board
IOB connections
IOB
HarnessesSC543 Fusing lamp overheat error 1 (software)
SC544 Fusing lamp overheat error 1: Hardware
SC545 Fusing lamp overheat error 2: Center lamp
Main Unit and LCIT: Paper Jam Errors
Finisher SR4120 Paper Jam Errors
Finisher SR4130 Paper Jam Errors
Finisher SR4080 Paper Jam Errors
Mail Box CS4010 Paper Jam Errors
Cover Interposer Tray CI4030/CI4040 Paper Jam Errors
Multi Folding Unit FD4000 Paper Jam Errors
Skew and Side-to-Side Registration
Checking Side-to-Side Registration
Correcting Side-to-Side Registration
Booklet Finisher Center Fold Correction
Slant in the direction of paper feed
Slant opposite the direction of paper feed
How to Correct Misaligned Center Folding
Finisher SR4080 (D610): Z-Folded Paper Output
Finishers SR4120/SR4130 (D3CG/D3CH)
Thin or soft paper does not exit completely
Z-folded paper, Curled paper interfere with tray full sensor
Problems with Z-folded paper from the Multi Folding Unit
Jogger Width Adjustment Procedure