HP (Hewlett-Packard) 4550 Printer User Manual


 
198 Solving problems with the printer
EN
Banding horizontal
The imaging drum may have been exposed to light, and will need
to be replaced.
The transfer belt may accumulate excess toner on its rollers
causing a random mechanical banding. If you notice buildup on
the rollers, replace the transfer kit.
Banding vertical
The blade on the toner cartridge can develop notches over time. If
you observe severe notching, replace the toner cartridge.
As the imaging drum gets older, the charge roller doesnt charge the
imaging drum as well as it used to. If you notice buildup or
contamination on the charge roller, replace the imaging drum.
Black lines
The toner cartridge is defective, and should be replaced.
The toner cartridge is not installed properly. Reinstall the toner
cartridge.
The fusing assembly is contaminated or damaged. Replace the
fuser kit.
The imaging drum is damaged or the waste toner collection in the
drum is full. Replace the imaging drum.
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