HP LaserJet M4345 - Multifunction Printer Service Manual

Set the real-time clock ....................................................................................................................... 100
Set the date and time ........................................................................................................ 100
Set the date format ........................................................................................... 100
Set the date ...................................................................................................... 100
Set the time format ........................................................................................... 100
Set the time ...................................................................................................... 100
Set the wake time ............................................................................................................. 101
Set the sleep delay ........................................................................................................... 101
Upgrading the firmware ..................................................................................................................... 102
Determining the current level of firmware ......................................................................... 102
Downloading the new firmware from the HP Web site ..................................................... 102
Transferring the new firmware to the MFP ....................................................................... 102
Using FTP to upgrade the firmware on a network connection ........................ 102
Using HP Web Jetadmin to upgrade the firmware .......................................... 104
Using MS-DOS commands to upgrade the firmware ...................................... 104
Upgrading the HP Jetdirect firmware ................................................................................ 105
Calibrate the scanner ........................................................................................................................ 106
Calibrate the control panel ................................................................................................................. 107
Disable Embedded Jetdirect I/O ........................................................................................................ 108
Select the MFP language .................................................................................................................. 109
4 Theory of operation
Basic operation .................................................................................................................................. 112
Sequence of operation (printer) ........................................................................................ 112
Sequence of operation (scanner) ..................................................................................... 113
Formatter system ............................................................................................................................... 114
Sleep mode ....................................................................................................................... 114
Resolution Enhancement technology (REt) ...................................................................... 114
EconoMode ....................................................................................................................... 115
Input/output ....................................................................................................................... 115
CPU ................................................................................................................................... 115
Memory ............................................................................................................................. 115
Hard disk .......................................................................................................... 115
Random-access memory ................................................................................. 115
DIMM slot ......................................................................................................... 115
Firmware .......................................................................................................... 115
Nonvolatile memory ......................................................................................... 116
HP Memory Enhancement technology ............................................................ 116
PJL overview ..................................................................................................................... 116
PML ................................................................................................................................... 116
Control panel ..................................................................................................................... 116
Scanner interface .............................................................................................................. 116
Engine-control system ....................................................................................................................... 117
DC controller PCA ............................................................................................................. 117
Motors and fans ................................................................................................................ 119
Motor and fan functions .................................................................................... 119
Ambient-temperature detection ........................................................................ 120
Engine power supply circuit .............................................................................................. 120
Fuser control ..................................................................................................................... 121
Fuser over-temperature protection .................................................................. 122
vi ENWW

HP LaserJet M4345 - Multifunction Printer Specifications

General

Print Technology	Laser
Print Speed	Up to 45 ppm
Print Resolution	Up to 1200 x 1200 dpi
Scan Type	Flatbed, ADF
Maximum Copy Resolution	600 x 600 dpi
Fax Capability	Yes
Standard Input Capacity	600 sheets
Standard Output Capacity	250 sheets
Maximum Output Capacity	500 sheets
Connectivity	USB, Ethernet
Functions	Print, copy, scan, fax
Internal Memory	256 MB
Maximum Internal Memory	512 MB
Duplex Printing	Yes
Processor Speed	533 MHz
Operating System Compatibility	Windows, Mac
Monthly Duty Cycle	200, 000 pages