HP 4300 Service Manual - Page 155

Parts-removal tree Use the following diagram to determine the order in which parts must be removed. Print cartridge Transfer roller Control-panel overlay Tray 1 Tray 2 feed rollers Rear output bin Note Some components in the parts-removal tree have a superscript number listed next to the component name (for example, "Right-side cover1"). The superscript indicates that this component must be removed to gain access to the transfer assembly and to the registration roller assembly. Components with superscript letters are removed in numerical order. Formatter cover Firmware DIMM Formatter assembly (2 machine screws) Accessory covers and the tray 2 extension door Fuser Tray 1 pickup roller Tray 1 separation pad Top cover Control-panel assembly Right-side cover1 Tray 2 media-size sensor Tray 2 lifter-drive assembly Cooling fan (right side; HP LaserJet 4300 only)2 Laser/scanner Paper-pickup assembly3 Print-cartridge motor (HP LaserJet 4300 only)4 Left-side cover7 Main motor DC controller assembly5 Main drive assembly6 Components listed with superscripts 1, 2, 5, 6 Registration-roller assembly Output delivery assembly8 Duplexing pendulum assembly Main cooling fan (left side) Power supply9 Paper-feed assembly Tray 1 pickup assembly10 Components listed with superscripts 1, 3, 4, 5, 6, 7, 8, 9, 10 Note: The formatter assembly and fuser are only listed once, but they must be removed to gain access to some of the other components. Transfer assembly Q2431-90912 Chapter 6 Removing and replacing parts 135