| Service Manual Brother Laser Printer HL 1850/HL 1870N (HL1850/HL1870N) 
 Contents:
 CHAPTER 1: GENERAL
 Features, specifications, etc.
 CHAPTER 2: INSTALLATION AND BASIC OPERATION
 Installation conditions, Installation procedures, basic operation of the printer etc.
 CHAPTER 3: THEORY OF OPERATION
 Basic operation of the mechanical system, the electrical system and the electrical circuits and their timing information.
 CHAPTER 4: DISASSEMBLY AND RE-ASSEMBLY
 Procedures for disassembling and re-assembling the mechanical system.
 CHAPTER 5: MAINTENANCE
 Periodical replacements parts, consumable parts, etc.
 CHAPTER 6: TROUBLESHOOTING
 Reference values and adjustments, troubleshooting image defects, troubleshooting malfunctions, etc.
 APPENDICES : Serial No. descriptions, Drum life & page counter, Diameter / circumference
 of rollers, Connection diagrams, PCB circuit diagrams, etc.
 PARTS REFERENCE LIST
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