Brother International HL 1850 Service Manual - Page 6

TABLE OF CONTENTS 1.3.9 Engine I/O 1.3.10 Panel I/O 1.4 Engine PCB 1.5 BR-net PCB 1.6 Power Supply 1.6.1 Low-voltage Power Supply 1.6.2 High-voltage Power Supply 2. MECHANICS 2.1 Overview of Printing Mechanism 2.2 Paper Transfer 2.2.1 Paper supply 2.2.2 Paper registration 2.2.3 Paper eject 2.2.4 Duplex printing 2.3 Sensors 2.3.1 Cover sensors 2.3.2 Toner sensors 2.3.3 DX tray sensor / DX paper size sensor 2.3.4 Rear cover sensor 2.3.5 Cassette sensor I Paper empty sensor 2.3.6 Paper eject sensor 2.4 Drum Unit 2.4.1 Photosensitive drum 2.4.2 Primary charger 2.4.3 Transfer roller 2.4.4 Cleaner 2.5 Toner Cartridge 2.6 Print Process 2.6.1 Charging 2.6.2 Exposure stage 2.6.3 Developing 2.6.4 Transfer 2.6.5 Fixing stage CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY 1. SAFETY PRECAUTIONS 2. DISASSEMBLY FLOW 3. DISASSEMBLY PROCEDURE 3.1 AC Cord 3.2 Drum Unit 3.3 Paper Cassette 3.4 Network Board (For HL-1870N only) 3.5 Top Cover 3.6 DX Feed ASSY 3.7 Rear Cover 3.8 Rear Cover R & L / Side Cover R & L 3.9 MP Cover ASSY iv 3-12 3-12 3-13 3-13 3-14 3-14 3-15 3-16 3-16 3-18 3-18 3-18 3-19 3-19 3-20 3-20 3-20 3-21 3-21 3-22 3-22 3-23 3-23 3-23 3-23 3-23 3-23 3-23 3-23 3-24 3-25 3-25 3-26 4-1 4-1 4-2 4-3 4-3 4-3 4-4 4-11 4-12 4-16 4-20 4-22 4-23