HP LaserJet 4345 Multifunction Printer series - Manual (Page 150)

Troubleshooting the output and input accessories
When the 3-bin mailbox or the stapler/stacker is installed correctly, the LED at the top of the
accessory is lit green. If the LED is off, is blinking, or is lit amber, a problem exists. See
Understanding accessory lights for the 3-bin mailbox and stapler/stacker .
For information about clearing jams that can occur in the envelope feeder or the optional
500-sheet feeders, see
Clearing jams from the optional envelope-feeder area and Clearing
jams from the tray 2, 3, 4, or 5 areas .
136 Chapter 7 Optional output and input devices ENWW