HP Color LaserJet 4700 Printer series - Manual (Page 181)

2. Pull down the front cover and transfer unit.
CAUTION Do not place any item on the transfer unit while it is open. If the transfer unit is
punctured, print quality problems could result.
3. Remove the used print cartridge from the printer.
4. Remove the new print cartridge from the bag. Place the used print cartridge in the bag for recycling.
ENWW Changing print cartridges 165