Table of Contents PageService Guide OL4000 About This ManualFront Cover 1Copyright & Manual Revision 2Part Number 31 Product Specifications1.1 Overview 41.2 Physical Specifications 51.3 Print Specifications 61.4 Paper Specifications 71.5 Power Requirements 81.8 Options 91.9 Consumables 101.10 Reliability Data 112 Principles of Operation2.1 Printer Overview 122.2 Main Control Function 13....2.2.02 Centronics Parallel Interface 14....2.2.03 RS-232C Serial Interface 15....2.2.04 Optional Font Card 16....2.2.05 Optional RAM Board / IC Set 172.3 Printer Control Function 18....2.3.02 Operation Panel 19....2.3.03 Engine Board 20....2.3.04 Power Supply Unit 21....2.3.05 Fuser Unit 22....2.3.06 Main Motor (Drum Motor) 23....2.3.07 LED Head 24....2.3.08 Resist Motor 25....2.3.09 DC Fan 262.4 Mechanical Operation Description 27....2.4.02 OL400 Printing Process 28....2.4.03 Process Descriptions 292.5 Sensors And Switches 30....2.5.01 Sensors and Switches 31....2.5.02 Sensor Functions 323 Maintenance & Disassembly3.1 Maintenance 33....3.1.02 Maintenance Tools 34....3.1.03 Maintenance Precautions 353.2 Disassembly/Assembly Procedures 36....3.2.01 Upper Cover 37....3.2.02 LED Head 38
