Brother International HL 1850 Service Manual - Page 7

HL-1850/1870N SERVICE MANUAL 3.10 Process Unit Cover ASSY 3.11 Laser Unit 3.12 Fixing Unit 3.13 Paper Pick-up Roller ASSY 3.14 Feed MP Unit 3.15 Drive Unit 3.16 Low-voltage Power Supply PCB ASSY 3.17 Main PCB ASSY 3.18 Fan Motor / Fan Motor 60 3.19 Base Plate 3.20 Engine PCB ASSY / High-voltage Power Supply PCB ASSY 3.21 DX Sensor PCB ASSY 3.22 Toner Sensor PCB Unit (Light Reception) 3.23 Toner LED PCB Unit (Light Emission) 3.24 Paper Feed Roller ASSY 3.25 First Feed Roller ASSY 3.26 Exit Roller Unit 3.27 Harness Winding Form 4. PACKING CHAPTER 5 PERIODIC MAINTENANCE 1. CONSUMABLE PARTS 1.1 Drum Unit 1.2 Toner Cartridge 2. PERIODICAL REPLACEMENT PARTS 3. PERIODICAL CLEANING 3.1 Cleaning the Printer Exterior 3.2 Cleaning the Drum Unit 3.3 Cleaning the Scanner Window 3.4 Cleaning the Electrical Terminals 4. MTBF / MTTR CHAPTER 6 TROUBLESHOOTING 1. INTRODUCTION 1.1 Initial Check 1.2 Warnings for Maintenance Work 1.3 Identify the Problem 2. OPERATOR CALLS & SERVICE CALLS 2.1 Operator Calls 2.2 Service Calls 3. PAPER PROBLEMS 3.1 Paper Loading Problems 3.2 Paper Jams 3.2.1 Clearing jammed paper 4-25 4-26 4-27 4-39 4-40 4-42 4-47 4-48 4-48 4-49 4-49 4-51 4-52 4-52 4-53 4-53 4-55 4-57 4-58 5-1 5-1 5-1 5-2 5-5 5-6 5-6 5-6 5-7 5-8 5-9 6-1 6-1 6-1 6-2 6-3 6-4 6-4 6-6 6-9 6-9 6-10 6-11 v