Sample Model and Serial Number Labels – 1-3 External Assembly Locations (LaserJet 4L/4ML) -1-6 External Assembly Locations (LaserJet 4P/4MP) -1-7 Internal Assembly Locations (all printers) – 1-8 LaserJet 4L Internal Assembly Locations – 1-9 LaserJet 4P Internal Assembly Locations – 1-10 Printer Space Requirements – 2-3 Distributing Toner – 2-6 Attaching the Help Labe”ls (LaserJet 4L/4ML) – 3-6 LaserJet 4L/4ML Front Control Panel – 3-9 LaserJet 4P/4MP Front (;ontrol Panel – 3-12 LaserJet 4P/4MP Menu Map – 3-14 Service Mode Menu Map (LaserJet 4ML/4P/4MP) -3-16 LaserJet 4L Self Test Page – 3-20 LaserJet 4MP Service Mt]de Self Test Page – 3-22 Engine Test Button and Printout (LaserJet 4L) – 3-25 Service Checkpoints – 4-2 Sample 5% Page Coverage – 4-4 Paper Feed Area Jam – 4-9 Clearing Jams from the Toner Cartridge Area – 4-10 Clearing Jams from the l’aper Guide – 4-10 Releasing Paper from the Fusing Assembly – 4-11 Clearing Jams from the Fuser Area – 4-12 Printer Functional Block Diagram – 5-2 DC Controller Loads – 5-3 Top Cover/Toner Cartridge Plunger – 5-6 Power Supply Block Diagram – 5-9 High Voltage Power Timing – 5-11 Formatter Block Diagram – 5-12 EconoMode vs.
Regular F’rint – 5-18 Image Formation Block Diagram – 5-22 Photosensitive Drum – 5-23 Fig 5-10 Drum Surface Potential --5-24 Fig 5-11 Drum Cleaning – 5-25 Fig 5-12 Primary Charging Roller – 5-26 Fig 5-13 Image Writing – 5-27 Fig 5-14 Image Development – 5-29 Fig 5-15 Developing Potentials – 5-30 Fig 5-16 Transferring Stage – 5-3:1 Fig 5-17 Fusing Film and Pressure Roller – 5-32 Fig 5-18 Printer Paper Path – 5-34 Fig 5-19 Oblique Roller Paper Alignment – 5-37 Fig l-l Fig I-2 Fig I-3 Fig I-4 Fig I-5 Fig I-6 Fig 2-1 Fig 2-2 Fig 3-1 Fig 3-2 Fig 3-3 Fig 3-4 Fig 3-5 Fig 3-6 Fig 3-7 Fig 3-8 Fig 4-1 Fig 4-2 Fig 4-3 Fig 4-4 Fig 4-5 Fig 4-6 Fig 4-7 Fig 5-1 Fig 5-2 Fig 5-3 Fig !i-4 Fig 5-5 Fig 5-6 Fig 5-7 Fig 5-8 Fig 5-9