HP LaserJet 4 Service Manual - Page 7

Printer Drivers 3-41 Install Printer Drivers and Utilities 3-41 How to Obtain Printer Drivers 3-41 DOS Utilities 3-42 Packing the Printer 3-43 Repackaging Instructions 3-43 Packing Checklist 3-43 Installing The Optional Lower Cassette 3-44 Loading Paper into the Optional Lower Cassette . . 3-45 Envelope Feeder Installation 3-49 LaserJet 4 and 4 Plus 3-50 LaserJet 5 3-50 SIMM Installation 3-51 Protecting the SIMM Board 3-51 Memory Requirements 3-53 Accessing the SIMM Slots 3-55 Installing the SIMM Boards 3-55 Testing a SIMM Board 3-57 Memory SIMM 3-57 Running a Self Test Printout 3-57 Personality SIMM (PostScript 3-58 Troubleshooting a SIMM Board 3-59 Service / Error Messages 3-59 4 Preventive Maintenance Introduction 4-1 Life Expectancy of Consumables 4-2 Service Checkpoints 4-3 Cleaning Your Printer 4-4 Toner Cartridge 4-5 Saving Toner with EconoMode (HP LaserJet 4 Plus and 5 Only 4-6 Storing the Toner Cartridge 4-6 Installing the Toner Cartridge 4-7 Non-HP Toner Cartridges 4-9 Clearing the TONER LOW Message 4-10 Periodic Maintenance Procedures 4-11 Removing the MP Tray (Tray 1) Pickup Roller and Separation Pad 4-11 Removing the PC (Tray 2) Pickup Roller 4-13 Removing the Lower Cassette (LC) or (Tray 3) Pickup Roller 4-14 Removing and Replacing the Transfer Roller . . . . 4-15 Contents-3