HP LaserJet 4 Service Manual - Page 9
Removal and Replacement - fuser
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Page 9 highlights
6 Removal and Replacement Required Tools 6-2 Hardware Review 6-2 Removing the Covers 6-4 Right Side Cover Removal 6-4 Top Cover Removal 6-5 Left Side Cover Removal 6-7 Rear Door Removal 6-8 Font Door Cover Removal (LJ 5 Right Front Cover Removal 6-10 Multi-Purpose (MP) Tray (Tray 1) Door Removal . . . 6-12 Multi-Purpose (MP) Tray (Tray 1) Removal 6-13 Assemblies Removal 6-15 Power Supply Removal 6-15 Paper Feed Assembly Removal 6-18 High Voltage Power Supply (HVPS) Removal . . . . . 6-21 Fuser Assembly Removal 6-22 Control Panel and Overlay Removal 6-23 Removing the SIMMs Door 6-25 Formatter Cage Removal 6-27 Formatter PCA Removal 6-29 DC Controller Removal 6-33 DC Controller Installation 6-35 Main Motor Assembly Removal 6-37 Gear Assembly Removal 6-38 Fan Removal 6-39 Output Assembly Removal 6-41 Paper Exit Sensor (PS3) Removal 6-42 Scanner Assembly Removal 6-43 Lower Cassette Assemblies 6-44 Lower Cassette Sensor PCA Removal 6-44 Lower Cassette Pickup Motor Removal 6-45 Replacing Fuser Assembly Parts 6-47 Fuser Assembly Configuration 6-48 Removing the Fuser Roller Heat Lamp 6-49 Fuser Assembly Thermoswitch Removal 6-55 Thermistor Removal 6-56 Paper Control PCA Removal 6-59 Sensor PCA Removal 6-60 PS1 and PS2 Sensor Assembly Removal 6-61 High Voltage Contact Plate (HVCP) and Paper Guide Removal 6-62 Accessing the High Voltage Contact Plate and Feed Guide Assembly 6-62 Contents-5