HP LaserJet 4 Service Manual - Page 11
Parts and Diagrams, Duplexer
View all HP LaserJet 4 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 11 highlights
Drum Rotation Functional Check 7-50 High Voltage Power Supply Assembly 7-51 Interface Troubleshooting 7-52 Communications Check 7-52 Test Message 7-52 AUTOEXEC.BAT Standard Configurations . . . . . 7-53 Parallel DOS Commands 7-53 Serial MS-DOS Commands 7-53 Communications Checks 7-54 MIO Troubleshooting 7-56 Troubleshooting Hints 7-56 Explanation of Self Test Printout 7-57 Troubleshooting Aids 7-59 Component Locations 7-59 Repetitive Defect Template 7-67 Voltage Test Points 7-69 Measuring the DC Voltage Levels 7-69 8 Parts and Diagrams How To Use the Parts Lists 8-1 Parts Lists and Illustrations 8-2 Accessory Parts 8-33 SIMM Memory 8-38 Miscellaneous Parts and Accessories 8-39 Parts List 8-40 A Duplexer Functional Overview A-2 Duplex Printing A-3 Switchback Assembly A-3 Holding Tray A-3 Electrical Overview A-5 Installing the Optional Duplexer A-6 Removal and Replacement A-8 Required Tools A-8 Removing the Covers A-9 Removing the Switchback Covers A-9 Removing the Side Cover on Power Side A-10 Removing the Side Cover on Gear Side A-11 Removing the Back Cover A-13 Removing the Front Cover A-13 Removing Internal Duplexer Components A-14 Removing the Fan/Motor/Solenoid/Sensor A-14 Removing the Switchback Paper Guide A-15 Contents-7