HP LaserJet M4345 Multifunction Printer series - Manual (Page 227)

Vertical white lines
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
3. Replace the print cartridge.
Tire tracks
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
This defect typically occurs when the print cartridge has far exceeded its rated life. For example, if
you are printing a very large quantity of pages with very little toner coverage.
1. Replace the print cartridge.
2. Reduce the number of pages that you print with very low toner coverage.
White spots on black
1. Print a few more pages to see if the problem corrects itself.
2. Make sure that the type and quality of the media you are using meet HP specifications. See
Select print media .
3. Make sure that the environmental specifications for the device are being met. See Printing and
paper-storage environment .
4. Replace the print cartridge.
ENWW Solve print-quality problems 215