chapter 1 Precautions 1.1 Safety Warning... 1.2 Caution for safety... 1.2.1 Toxic material... 1.2.2 Electric Shock and Fire Safety Precautions... ... 1.2.3 Handling Precautions... ... 1.2.4 Assembly / Disassembly Precautions... 1.2.5 Disregarding this warning may cause bodily injury... ... 1.3 ESD Precautions... ... chapter 2 Product Overview 2.1 Product Specifications... 2.1.1 Product Overview... 2.1.2 Specifications... 2.1.3 Model Comparison Table... 2.2 System Overview... 2.2.1 Front View... ... 2.2.2 Rear View... ... 2.2.3 System Layout... ... 2.2.4 Engine H/W Specifications... ... 2.2.5 Engine F/W Contol Algorithm... 2.2.6 S/W Descriptions... ... chapter 3 Maintenance and Disassembly 3.1 Precautions when replacing parts... 3.1.1 Precautions when assembling and disassembling... ... 3.1.2 Preautions when handling PBA... ... 3.1.3 Releasing Plastic Latches... ... 3.2 Screws used in the Printer 3.3 Cover... ... 3.3.1 Left/Right cover... 3.3.2 Rear bracket... ... 3.3.3 Cover-open... ... 3.3.4 Top/Front cover... 3.4 Main PBA... ... 3.5 SMPS/HVPS board... ... 3.6 Fuser unit... ... 3.7 LSU... 3.8 Drive unit... ... 3.9 Step motor... 3.10 Pick up roller... ... chapter 4 Alignment and Troubleshooting 4.1 Alignment and Adjustments... 4.1.1 Control Panel... 4.1.2 Understanding the LEDs... 4.1.3 JAM Removal... ... 4.1.4 Printing a report... 4.1.5 Periodic Defective Image... 4.1.6 Firmware upgrade... 4.1.7 Using the smart panel program... ... 4.2 Troubleshooting... 4.2.1 Procedure of Checking the Symptoms... ... 4.2.2 Bad discharge... ... 4.2.3 Malfunction... 4.2.4 Bad image... chapter 5System Diagram 5.1 Block Diagram... ...5.2 Connection Diagram...5-1 5-2 chapter 6 Reference Information 6.1 Tool for Troubleshooting... ... 6.2 Acronyms and Abbreviations... ... 6.2.1 Acronyms... ... 6.2.2 Service Parts... 6.3 A4 ISO 19798 Standard Pattern... 6.3.1 A4 ISO 19752 Standard Pattern... 6.4 Selecting a location... ... attached Exploded Views & Parts List