- Hewlett-Packard LaserJet Printer Service Manual

List of Figures
Figure 1-1 HP LaserJet 5L Model and Serial Numbers . . . . . . . . . . . . 1-4
Figure 1-2 HP LaserJet 6L Model and Serial Numbers . . . . . . . . . . . . . 1-5
Figure 1-3 Front/Side Views of the Printer . . . . . . . . . . . . . . . . . . 1-7
Figure 1-4 Front Door Assemblies . . . . . . . . . . . . . . . . . . . . . . 1-8
Figure 1-5 Back View of the Printer . . . . . . . . . . . . . . . . . . . . . . 1-9
Figure 2-1 Printer Space Requirements . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-2 Toner Cartridge Distribution . . . . . . . . . . . . . . . . . . . . 2-6
Figure 3-1 Self-test Page for HP LaserJet 5L . . . . . . . . . . . . . . . . . 3-7
Figure 3-2 Self-test Page for HP LaserJet 6L . . . . . . . . . . . . . . . . . 3-8
Figure 3-3 Engine Test Button . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Figure 4-1 Five Percent Text Coverage . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-2 Static Eliminator Teeth . . . . . . . . . . . . . . . . . . . . . . 4-8
Figure 5-1 Printer Functional Block Diagram . . . . . . . . . . . . . . . . . 5-3
Figure 5-2 DC Controller Loads . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Figure 5-3 EconoMode vs Normal Mode . . . . . . . . . . . . . . . . . . 5-10
Figure 5-4 Image Formation Block Diagram . . . . . . . . . . . . . . . . 5-12
Figure 5-5 Simplified Paper Path . . . . . . . . . . . . . . . . . . . . . . 5-16
Figure 5-6 Solenoid and Sensors . . . . . . . . . . . . . . . . . . . . . . 5-17
Figure 5-7 General Timing Diagram – HP LaserJet 5L . . . . . . . . . . . 5-20
Figure 5-8 General Timing Diagram – HP LaserJet 6L . . . . . . . . . . . 5-21
Figure 6-1 Phillips and Posidriv screwdrivers . . . . . . . . . . . . . . . . . 6-4
Figure 6-2 Back Cover Removal (1 of 2) . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-3 Back Cover Removal (2 of 2) . . . . . . . . . . . . . . . . . . . 6-7
Figure 6-4 EP Door Assembly Removal . . . . . . . . . . . . . . . . . . . 6-8
Figure 6-5 Memory Door Removal . . . . . . . . . . . . . . . . . . . . . . 6-9
Figure 6-6 Main Cover and Paper Input Assembly Removal . . . . . . . . 6-10
Figure 6-7 Control Panel Removal . . . . . . . . . . . . . . . . . . . . . 6-11
Figure 6-8 Exit Roller Removal . . . . . . . . . . . . . . . . . . . . . . . 6-12
Figure 6-9 Delivery Assembly Removal (1 of 2) . . . . . . . . . . . . . . 6-13
Figure 6-10 Delivery Assembly Removal (2 of 2) . . . . . . . . . . . . . . 6-14
Figure 6-11 Fuser Pressure Plate Removal . . . . . . . . . . . . . . . . . . 6-15
Figure 6-12 Fuser Pressure Plate Replacement . . . . . . . . . . . . . . . . 6-16
Figure 6-13 Heating Element Removal (1 of 3) . . . . . . . . . . . . . . . 6-17
Figure 6-14 Heating Element Removal (2 of 3) . . . . . . . . . . . . . . . 6-18
Figure 6-15 Heating Element Removal (3 of 3) . . . . . . . . . . . . . . . 6-19
Figure 6-16 Pressure Roller Removal . . . . . . . . . . . . . . . . . . . . . 6-20
Figure 6-17 Face-Up/Face-Down Lever Replacement . . . . . . . . . . . . 6-21
Figure 6-18 Fuser Exit Roller Removal . . . . . . . . . . . . . . . . . . . 6-22
Figure 6-19 Paper Exit Sensor Flag Replacement . . . . . . . . . . . . . . 6-23
Figure 6-20 Laser/Scanner Assembly Removal . . . . . . . . . . . . . . . 6-24
Figure 6-21 Solenoid Removal (1 of 2) . . . . . . . . . . . . . . . . . . . . 6-25
Figure 6-22 Solenoid Removal (2 of 2) . . . . . . . . . . . . . . . . . . . . 6-26
Figure 6-23 Pickup Roller Assembly Removal (1 of 2) . . . . . . . . . . . 6-27
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