HP LaserJet 4345 Multifunction Printer series - Manual (Page 237)

Light print (entire page)
1. Make sure that the print cartridge is fully installed.
2. Make sure that the EconoMode setting is turned off at the control panel and in the printer
driver.
3. Open the CONFIGURE DEVICE menu at the control panel. Open the PRINT QUALITY
submenu and increase the TONER DENSITY setting. See Print quality submenu .
4. Try using a different type of paper.
5. The print cartridge might be almost empty. Replace the print cartridge.
Specks
Specks might appear on a page after a jam has been cleared.
1. Print a few more pages to see if the problem corrects itself.
2. Clean the inside of the MFP and run a cleaning page to clean the fuser. (See Cleaning
the MFP .)
3. Try using a different type of paper.
4. Check the print cartridge for leaks. If the print cartridge is leaking, replace it.
Dropouts
1. Make sure that the environmental specifications for the MFP are being met. (See
Environmental specifications .)
2. Make sure that type and quality of the paper you are using meet HP specifications. (See
Print media specifications .)
ENWW Correcting print-quality and copy-quality problems 223