HP LaserJet 4000 Service Manual - Page 7

Pickup and Separation Rollers Duplex D-Roller CLEANING THE PRINTER Registration Area Antistatic Teeth Transfer Guide Clearing the User Maintenance Message 5. Functional Overview INTRODUCTION IMAGE FORMATION SYSTEM PAPER PICKUP AND FEED SYSTEM BASIC SEQUENCE OF OPERATION Overview Standard Printer Operation Timing Diagram MIO 6. Removal and Replacement INTRODUCTION REQUIRED TOOLS HARDWARE REVIEW COVERS Right Side Cover Front Upper Cover Assembly Front Cover Control Panel Assembly Left Side Cover Right Rear Cover Lower Rear Cover RIGHT SIDE ASSEMBLIES Formatter Pan Cover RFI Fingers Formatter Pan Cover Reassemble Fan FM3 Formatter PCA and Pan Assembly ROM and SIMM Locations Formatter PCA Redesign PostScript Installation LaserJet IIISi Formatter PCA Removal LaserJet 4Si Formatter PCA Removal 4-9 4-10 4-11 4-13 4-14 4-15 4-16 5-1 5-1 5-4 5-6 5-6 5-6 5-7 5-9 6-1 6-2 6-2 6-3 6-3 6-4 6-6 6-9 6-10 6-11 6-12 6-13 6-14 6-15 6-15 6-16 6-17 6-17 6-17 6-18 6-18 6-19 Contents-3