HP LaserJet 4000 Service Manual - Page 14
Components
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6-45. Setting Clearance Between Stop Ring Solenoid Body 6-52 6-46. Delivery Roller Assembly 6-53 6-47. Duplex Unit 6-54 6-48. Duplex PCA 6-55 7-1. Basic Troubleshooting Flowchart 7-8 7-2. Tray Size Sensing Microswitches Locations 7-26 7-3. PS1: Top Cover Closed Photosensor 7-28 7-4. Paper Motion Sensors 7-30 7-5. Toner Cartridge Connections 7-39 7-6. Corresponding Print Engine Connections . 7-39 7-7. Defeating SW101 Actuator. 7-53 7-8. Defeating PS1 Sensor. 7-53 7-9. Location of Sensors, Solenoids, Switches and Fans 7-55 7-10. Location of Connectors 7-56 7-11. Formatter PCA Components 7-57 7-12. DC Power Supply PCA Components 7-58 7-13. Paper Feed PCA Components 7-59 7-14. DC Controller PCA Components - LaserJet IIISi 7-60 7-15. DC Controller PCA Components - LaserJet 4Si 7-61 7-16. AC Driver PCA Components 7-63 7-17. High Voltage Power Supply PCA Components 7-64 7-18. Formatter Service Configuration 7-66 7-19. Service Mode Menu Map 7-71 7-20. Sample of Service Mode (Chart A) Self test . 7-74 7-21. LaserJet HISi Extended Diagnostics Flowchart 7-79 7-22. LaserJet 4Si Extended Diagnostics Flowchart 7-80 7-23. Image Defect Samples (1 of 2) 7-86 7-24. Image Defect Samples (2 of 2) 7-87 7-25. Vertical Repetitive Defect Ruler 7-94 7-26. Horizontal Repetitive Defect Ruler 7-95 7-27. Horizontal Repetitive Defect Ruler 7-96 7-28. Horizontal Repetitive Defect Ruler 7-97 7-29. Location of Duplex Assembly Components . . 7-115 7-30. Location of Duplex Assembly Connectors . . 7-116 7-31. Wiring Diagram 7-118 8-1. Major Assemblies (1 of 2) 8-4 8-2. Major Assemblies (2 of 2) 8-6 8-3. Covers and Panels 8-8 8-4. Top Cover Assembly (Figure 1 of 2) 8-10 8-5. Top Cover Assembly (Figure 2 of 2) 8-12 8-6. Internal Components (Figure 1 of 3) 8-14 Contents-10