HP LaserJet M4345 MFP Service Manual

Removal and replacement strategy
This chapter describes how to remove, replace, and reassemble the major assemblies of the MFP.
Replacement is generally the reverse of removal. Notes are provided to assist with any difficult
replacement procedures.
To identify the left side and right side of the MFP, face the control panel.
WARNING! Unplug the power cord from the power outlet at the wall receptacle before
attempting to service the MFP. If you do not follow this warning, severe injury can result.
Certain functional checks during troubleshooting might require power to the MFP. However, all
power should be turned off and the MFP should be unplugged when you remove any MFP
assemblies or components.
Never operate or service the MFP when the protective cover is removed from the laser/
scanner assembly. The reflected beams, although invisible, can damage your eyes.
CAUTION The MFP contains components that are sensitive to electrostatic discharge
(ESD). Always perform service work at an ESD-protected workstation. If an ESD-protected
workstation is not available, discharge body static by grasping the MFP chassis before
touching an ESD-sensitive component. Ground the MFP chassis before servicing the MFP.
Required tools
●
#2 Phillips screwdriver
●
Short #2 Phillips screwdriver (shaft length of 76 mm [3 inches])
●
Right-angle #2 Phillips screwdriver
●
Small flat-blade screwdriver
●
Needle-nose pliers
●
ESD mat (if available; see the preceding ESD caution)
●
Penlight (optional)
● Tape (optional)
CAUTION A pozidriv screwdriver can damage screw heads on the MFP. Use a #2 Phillips
screwdriver.
Before performing service
●
If possible, print a menu map and Configuration page.
●
Remove all of the accessories and print media, the print cartridge, and tray 2 from the MFP.
●
Unplug the power cord from the power outlet at the wall receptacle.
●
Place the MFP on an ESD mat, if one is available. If an ESD-protected workstation is not
available, discharge body static by grasping the MFP chassis before touching an ESD-sensitive
component. Ground the MFP chassis before servicing the MFP.
ENWW Removal and replacement strategy 221
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HP LaserJet M4345 MFP Specifications

General

Print Technology	Laser
Functions	Print, copy, scan, fax
Print Speed	Up to 45 ppm
Print Resolution	Up to 1200 x 1200 dpi
Monthly Duty Cycle	Up to 200, 000 pages
Standard Input Capacity	600 sheets
Standard Output Capacity	250 sheets
Scanner Type	Flatbed, ADF
Maximum Scan Size	216 x 356 mm
Duplex Printing	Automatic
Memory, standard	256 MB
Memory, maximum	512 MB
Hard Disk	Optional
Print Languages	HP PCL 6, HP PCL 5e, HP Postscript Level 3 emulation
Paper Handling Input, Standard	100-sheet multipurpose tray, 500-sheet input tray
Scan Resolution, Optical	Up to 600 dpi
Scan Speed (Normal, A4)	Up to 45 ppm
Automatic Document Feeder Capacity	50 sheets
Copy Speed (Black, Normal Quality, A4)	Up to 45 cpm
Copy Resolution (Black Text)	Up to 600 x 600 dpi
Copy Reduce / Enlarge Settings	25 to 400%
Maximum Number of Copies	999
Fax Resolution	Up to 300 x 300 dpi
Fax Transmission Speed	3 sec per page
Connectivity	Ethernet
First Page Out	As fast as 8.5 sec
Display	LCD
Quick Dialing, Maximum Number	100 numbers
Operating System Compatibility	Windows, Mac, Linux
Network Ready	Standard (built-in Ethernet)