HP LaserJet M4345 MFP Service Manual

Defect description
A large area of toner is missing.
Possible causes
Operating environment or media in use does not meet HP specifications.
Troubleshooting and suggestions
1. Make sure that the environmental specifications for the device are being met.
2. If the media is rough and the toner easily rubs off, touch Administration, Print Quality, and Fuser
Modes, and then select the media type you are using.
3. Try using a smoother media.
Lines
A
A
A
A
A
B
B
B
B
B
C
C
C
C
C
a
a
a
a
a
c
c
c
c
c
b
b
b
b
b
Defect description
Lines or streaks appear on the page.
Possible causes
The device needs to be cleaned. The print cartridge is not functioning properly.
Troubleshooting and suggestions
1. Print a few more pages to see if the problem corrects itself.
2. Clean the inside of the device and run a cleaning page.
3. Replace the print cartridge.
Gray background
Defect description
The background of the page is gray or has a grayish cast.
ENWW Solve print-quality problems 421
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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)