HP LaserJet M4345 MFP Service Manual

Duplex-printing unit
The optional duplex-printing unit (duplexer) adds another reversing sequence to print on both sides
of a page.
NOTE The MFP cannot print on both sides of paper that is 180 mm (7.1 inches) or shorter.
Figure 4-31 Duplex printing paper path
Reversing/duplexing pickup
Whenever the duplex-printing unit is installed and the print job specifies duplex printing, the MFP
feeds the paper into the duplex-printing unit after the reversing operation rather than feeding it into
the output delivery path. The duplex-printing unit feeds the paper into the print engine a second time
so that the second side can be printed. After the paper has entered the reversing unit a second time,
the MFP delivers the paper to the output bin.
NOTE If the top-of-page sensor (PS108) determines that the paper is 180 mm (7.1 inches)
or shorter, the MFP does not feed the paper into the duplex-printing unit after the reversing
operation. The paper is delivered to the output bin instead.
The DC controller PCA controls all of the components in the duplex-printing unit.
ENWW Pickup, feed, and delivery system 157
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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)