Brother HL-1200 Service Manual

i
Confidential
CONTENTS
REGULATION ........................................................................................................... iv
SAFETY INFORMATION........................................................................................... vi
CHAPTER 1 TROUBLESHOOTING
1. INTRODUCTION .......................................................................................................................... 1-1
1.1 Checks before Commencing Troubleshooting..................................................................... 1-1
2. OVERVIEW .................................................................................................................................. 1-3
2.1 Cross-section Drawing......................................................................................................... 1-3
2.2 Paper Feeding ..................................................................................................................... 1-4
2.3 Operation of Each Part ........................................................................................................ 1-5
2.4 Block Diagram ..................................................................................................................... 1-6
2.5 Main Components................................................................................................................ 1-7
3. LED DISPLAY .............................................................................................................................. 1-8
3.1 LED Display when Operator Call Occurs............................................................................. 1-8
3.2 LED Display when Service Call Occurs............................................................................. 1-10
3.3 Error Messages for Maintenance Printing ......................................................................... 1-13
3.4 Error Display when Service Call Occurs............................................................................ 1-14
3.5 Image Defects.................................................................................................................... 1-15
4. ERROR CAUSE AND REMEDY ................................................................................................ 1-16
4.1 Troubleshooting for Paper Feeding Problems ................................................................... 1-16
4.1.1 No paper is fed from paper tray........................................................................... 1-16
4.1.2 Paper becomes wrinkled ..................................................................................... 1-17
4.1.3 Paper is curled ................................................................................................... 1-17
4.1.4 Paper is jammed ................................................................................................. 1-18
4.2 Troubleshooting According to Image Defect...................................................................... 1-19
4.2.1 Light..................................................................................................................... 1-19
4.2.2 Faulty registration................................................................................................ 1-20
4.2.3 Dark..................................................................................................................... 1-20
4.2.4 Poor fixing ........................................................................................................... 1-21
4.2.5 Completely blank................................................................................................. 1-21
4.2.6 Image distortion................................................................................................... 1-22
4.2.7 All black ............................................................................................................... 1-22
4.2.8 Dirt on the back of paper ..................................................................................... 1-23
4.2.9 Vertical streaks.................................................................................................... 1-23
4.2.10 Black vertical streaks on a light background ....................................................... 1-23
4.2.11 Black horizontal stripes ....................................................................................... 1-24
4.2.12 White vertical streaks .......................................................................................... 1-24
4.2.13 White horizontal streaks ...................................................................................... 1-25

Brother HL-1200 Specifications

General

Print Technology	Laser
Interface	USB 2.0
Memory	1 MB
Weight	4.6 kg
Print Speed	20 ppm
Resolution	Up to 2400 x 600 dpi
Paper Input Capacity	150 sheets
Dimensions	340 mm x 238 mm x 189 mm
Supported Operating Systems	Windows, Mac OS