Stacker-feed stationary jam...............................................................................141
Stacker residual-media jam...............................................................................141
Stapler/stacker ...................................................................................................................142
Stapler/stacker feed and delivery.......................................................................142
Staple-mode feed and delivery..........................................................................144
Stapler unit.........................................................................................................148
Stapler-unit operation ........................................................................................149
Staple level-detection.........................................................................................151
Stack-mode feed and delivery...........................................................................151
Stapler/stacker jam detection ............................................................................................152
Stapler/stacker feed jam ...................................................................................152
Stapler/stacker feed stationary jam....................................................................152
Stapler/stacker delivery jam...............................................................................152
Stapler/stacker residual media jam....................................................................152
Image-formation system .....................................................................................................................153
Electrostatic latent-image formation...................................................................................155
Primary charging ...............................................................................................155
Writing the image ..............................................................................................155
Developing the image .......................................................................................156
Transferring the image ......................................................................................157
Fusing the image ...............................................................................................158
Cleaning the transfer charging roller and photosensitive drum.........................159
Print-cartridge memory chip...............................................................................160
Formatter system.................................................................................................................................161
PowerSave (LJ 4200/4200L/4300) or Sleep (LJ 4250/4350) Mode...................................161
Resolution Enhancement technology ...............................................................................162
EconoMode ........................................................................................................................162
Input/output.........................................................................................................................162
Parallel interface................................................................................................162
USB (HP LaserJet 4250/4350 Series printers only)..........................................162
Embedded ethernet print server (HP LaserJet 4250/4350 Series printers
only)....................................................................................................................162
Expanded I/O.....................................................................................................163
Flash (HP LaserJet 4200/4300 Series printers only).........................................163
CompactFlash card (HP LaserJet 4250/4350 Series printers only)..................163
Hard-disk accessory...........................................................................................163
CPU ...................................................................................................................163
Printer memory ..................................................................................................................163
Read-only memory ............................................................................................163
Random-access memory ..................................................................................163
DIMM slots .......................................................................................................164
Firmware DIMM (LJ 4200/4200L/4300 only).....................................................164
Nonvolatile memory...........................................................................................164
Memory Enhancement technology ...................................................................164
PJL overview .....................................................................................................................164
PML.....................................................................................................................................165
Control panel ......................................................................................................................165
6 Removing and replacing parts
Chapter contents.................................................................................................................................167
vii
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