HP LaserJet 4000 Service Manual - Page 8
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Formatter Pan Assembly (LaserJet IIISi/4Si) Formatter Pan Reassembly Tips Fan FM1 Fan FM2 AC Power Inlet Assembly DC Power Supply DC Controller PCA Power Switch PAPER INPUT UNIT (PIU) AND SUBASSEMBLIES Paper Input Unit (PIU) Paper Input Unit (PIU) PCA INTERNAL ASSEMBLIES Laser/Scanner Assembly Registration Assembly Paper Refeed Unit (PRU) Transfer Guide High Voltage Power Supply Main Motor Drive Train Left Block Right Block TOP COVER ASSEMBLY AND SUBASSEMBLIES Top Cover Assembly/Hinge Pins Job Offset Assembly Solenoid Clearance Adjustment Delivery Roller Assembly DUPLEX UNIT SUBASSEMBLIES Duplex Unit Duplex PCA 6-20 6-22 6-23 6-24 6-25 6-27 6-28 6-31 6-32 6-32 6-33 6-34 6-35 6-36 6-37 6-38 6-39 6-40 6-43 6-45 6-47 6-47 6-50 6-52 6-53 6-54 6-54 6-55 7. Troubleshooting INTRODUCTION 7-1 PRE-TROUBLESHOOTING PROCEDURES 7-2 Talk to the Customer! 7-2 Preliminary Operating Checks 7-3 Pre-Troubleshooting Checklist 7-4 Basic Troubleshooting Flowchart 7-8 PRINTER MESSAGE SUMMARIES 7-9 Clearable Warnings (LaserJet 4Si Only) 7-21 PRINTER MESSAGE DETAILS 7-23 "02 WARMING UP" (continuous) Message 7-23 "UC/LC LOAD" Message 7-24 Contents-4