HP 3500 - Manual (Page 22)

Walk around
The following illustrations identify the locations and names of key components of this printer.
Front view (shown with 500-sheet paper feeder)
1 on/off switch
2 Tray 3 (optional; 500 sheets of standard paper)
3 Tray 2 (250 sheets of standard paper)
4 Tray 1
5 front door
6 printer control panel
7 output bin extender, for use with B5 (JIS), B5 (ISO), and 216 by 356 mm (8.5 by 14 in) paper
8 output bin
9 DIMM access door (available on the HP Color LaserJet 3700 series printer)
Back and side view
1 upper rear door
2 parallel connection (available on the HP Color LaserJet 3700 series printer)
3 lower rear door (rear output bin)
4 USB connection
5 power connection
6 Tray 3 (optional)
7 on/off switch
8 EIO connection (available on the HP Color LaserJet 3700 series printer)
9 DIMM access door (available on the HP Color LaserJet 3700 series printer)
10 Chapter 1 Printer basics ENWW