HP LaserJet 4345 Multifunction Printer series - Manual (Page 203)

4. Insert the optional envelope feeder into the printer until it locks into place. Pull gently on
the optional envelope feeder to be sure that it is securely in place.
5. Fold down the envelope-feeder tray. Lift the envelope weight.
6. Reload the envelopes, making sure that you push the bottom envelopes in slightly
farther than the top envelopes.
7. If a jam message persists, jammed media is still in the MFP. Look for the jam in another
location.
Clearing jams from the tray 1 area
Use this procedure to clear jams that occur in the tray 1 input area.
To clear jams from the tray 1 area
1. Open the top cover, open tray 1, and remove the print cartridge.
2. Use the green handle to lift the paper-access plate.
ENWW Clearing jams 189