Dell 3100cn Color Laser Printer - Manual (Page 209)

Removing Print Jams Near the Fuser Unit
When Using the Optional Duplex Module
1. Open the duplex module.
2. Open the BTR cover.
CAUTION: Do not attempt to clear any jams using tools or instruments. This may permanently damage the printer.
1 Duplex module
2 Print media source
3 Duplex cover
4 Feeder cover
5 Inner rear cover
(displayed Reg Cover on message)
6 Bias Transfer Roll (BTR) cover
7 Fuser cover
8 Paper cover (not present when duplex module has been installed)
NOTE: To resolve the message displayed on the operator panel, you must clear all print media from the print media path.