Calibrate the scanner ....................................................................................................................... 126 Upgrade the firmware ....................................................................................................................... 127 Determine the current firmware version ........................................................................... 127 Download new firmware from the HP Web site ............................................................... 127 Transfer the new firmware to the product ........................................................................
127 Use FTP to upload the firmware through a browser ....................................... 127 Use FTP to upgrade the firmware on a network connection ........................... 128 Use HP Web Jetadmin to upgrade the firmware ............................................. 128 Use MS-DOS commands to upgrade the firmware ......................................... 129 Use the HP Jetdirect firmware ......................................................................................... 129 Set the real-time clock ......................................................................................................................
131 Set the date format .......................................................................................................... 131 Set the date ..................................................................................................................... 131 Set the time format .......................................................................................................... 131 Set the time ......................................................................................................................
131 5 Theory of operation Basic operation ................................................................................................................................. 134 Sequence of operation ..................................................................................................... 134 Formatter system ............................................................................................................................. 136 Sleep mode ...................................................................................................................... 136 Resolution Enhancement technology (REt) .....................................................................
136 Input/output ...................................................................................................................... 137 CPU ................................................................................................................................. 137 Memory ............................................................................................................................ 137 Hard disk ......................................................................................................... 137 Random-access memory ................................................................................
137 DIMM slot ........................................................................................................ 137 Nonvolatile memory ........................................................................................ 137 PJL overview ................................................................................................................... 137 PML ................................................................................................................................. 138 Control panel ...................................................................................................................
138 Engine-control system ...................................................................................................................... 139 DC controller .................................................................................................................... 140 Solenoids ........................................................................................................ 140 Switches .......................................................................................................... 141 Sensors ...........................................................................................................
142 Motors and fans .............................................................................................. 143 Fuser control .................................................................................................................... 145 Fuser temperature-control circuit .................................................................... 147 Fuser over-temperature protection .................................................................. 148 Fuser-failure detection .................................................................................... 149 Fuser identification ..........................................................................................
149 vi ENWW