Brother FAX-2840 Service Manual page 36

CHAPTER 2 TROUBLESHOOTING
This chapter details error messages and codes which the incorporated self-diagnostic
function of the machine will display if any error or malfunction occurs. If any error message
appears, refer to this chapter to find which parts should be checked or replaced.
The latter half of this chapter provides sample problems which could occur in the main
sections of the machine and related troubleshooting procedures. These will help service
personnel identify and repair other similar defective sections.
1. INTRODUCTION ........................................................................................................... 2-1
1.1 Precautions............................................................................................................ 2-1
1.2 Initial Check ........................................................................................................... 2-3
2. OVERVIEW ................................................................................................................... 2-5
2.1 Cross-section Drawing .......................................................................................... 2-5
2.1.1 Printer part.................................................................................................. 2-5
2.1.2 Scanning part ............................................................................................. 2-6
2.2 Paper Feeding ....................................................................................................... 2-7
2.2.1 Printer part.................................................................................................. 2-7
2.2.2 Scanning part ............................................................................................. 2-8
2.3 Operation of Each Part .......................................................................................... 2-9
2.4 Block Diagram ..................................................................................................... 2-10
2.5 Main Components ............................................................................................... 2-11
2.6 Life of Toner Cartridge and Drum Unit................................................................. 2-12
3. ERROR INDICATIONS................................................................................................ 2-14
3.1 Error Codes ......................................................................................................... 2-14
3.2 Error Messages ................................................................................................... 2-19
3.3 Communication Error Codes ............................................................................... 2-21
3.4 Error Cause and Remedy.................................................................................... 2-24
3.5 Paper Feeding Troubleshooting .......................................................................... 2-60
3.5.1 Pickup function of paper tray does not work ............................................ 2-60
3.5.2 No feeding ................................................................................................ 2-60
3.5.3 Double feeding ......................................................................................... 2-61
3.5.4 Dirt on paper............................................................................................. 2-61
3.5.5 Paper feeding at an angle ........................................................................ 2-61
3.5.6 Wrinkles or creases.................................................................................. 2-62
3.5.7 Curl in the paper....................................................................................... 2-63
3.6 Image Defect Troubleshooting ............................................................................ 2-64
3.6.1 Image defect examples ............................................................................ 2-64
3.6.2 Troubleshooting according to image defect ............................................. 2-65
3.7 Software Setting Troubleshooting........................................................................ 2-76
CONTENTS
Confidential