HP Laser Jet 5550

4
Printer Maintenance
This chapter contains information for the following maintenance topics.
Cleaning the printer and accessories ..................................................................................100
Cleaning spilled toner .....................................................................................................100
Vacuum specifications ....................................................................................................100
Periodic cleaning ...................................................................................................................102
Cleaning the static discharge comb ...............................................................................102
Cleaning the OHT sensor ...............................................................................................103
Approximate replacement intervals for supply items ............................................................105
ETB life under different circumstances ...........................................................................107
Locating supplies ..................................................................................................................108
Replacing supply items .........................................................................................................109
Changing print cartridges ...............................................................................................109
Replacing the transfer unit (ETB) ...................................................................................111
Replacing the transfer unit when it is not at end of life ..................................................112
Replacing the fuser .........................................................................................................113
Replacing the fuser when it is not at end of life ..............................................................114
Printer memory (HP Color LaserJet 5500 models) ...............................................................116
To print a configuration page ..........................................................................................116
Installing memory and font DIMMs (for HP Color LaserJet 5500 models) .....................116
Installing DDR memory DIMMs (for HP Color LaserJet 5550 models) ..........................119
Enabling memory (HP Color LaserJet 5500 models) .....................................................122
Enabling the language font DIMM (HP Color LaserJet 5550 models) ...........................122
Enabling the language font DIMM (HP Color LaserJet 5500 models) ...........................123
Checking DIMM installation (HP Color LaserJet 5500 models) .....................................123
Installing an HP Jetdirect print server card ....................................................................123
ENWW 99