Brother HL-5240 Service Manual page 6

3. PERIODICAL CLEANING........................................................................................3-49
3.1 Cleaning the Inside of the Printer .................................................................................. 3-49
3.2 Cleaning the Corona Wire.............................................................................................. 3-52
CHAPTER 4 TROUBLESHOOTING ....................................................... 4-1
1. INTRODUCTION .......................................................................................................4-1
1.1 Initial Check...................................................................................................................... 4-1
1.2 Warnings for Maintenance Work ..................................................................................... 4-2
1.3 Identify the Problem ......................................................................................................... 4-3
2. ERROR MESSAGE ...................................................................................................4-4
2.1 Operator Calls .................................................................................................................. 4-4
2.1.1 Operator calls for HL-5240/5250DN.................................................................................... 4-4
2.1.2 Operator calls for HL-5270DN/5280DW .............................................................................. 4-6
2.2 Service Calls .................................................................................................................... 4-8
2.2.1 Service calls for HL-5240/5250DN ...................................................................................... 4-8
2.2.2 Service calls for HL-5270DN/5280DW .............................................................................. 4-10
2.3 Error Message in the Status Monitor ............................................................................. 4-12
2.4 Error Message Printouts ................................................................................................ 4-14
3. PAPER PROBLEMS................................................................................................4-15
3.1 Paper Loading Problems ............................................................................................... 4-15
3.2 Paper Jams .................................................................................................................... 4-16
3.2.1 Paper jams and how to clear them for HL-5240/5250DN .................................................. 4-16
3.2.2 Paper jams and how to clear them for HL-5270DN/5280DW ........................................... 4-18
3.2.3 Causes & countermeasures .............................................................................................. 4-26
3.3 Paper Feeding Problems ............................................................................................... 4-27
4. SOFTWARE SETTING PROBLEMS.......................................................................4-29
5. MALFUNCTIONS ....................................................................................................4-32
6. IMAGE DEFECTS ...................................................................................................4-38
6.1 Image Defect Examples................................................................................................. 4-38
6.2 Diameter of Rollers ........................................................................................................ 4-38
6.3 Troubleshooting Image Defect....................................................................................... 4-39
6.4 Location of Grounding Contacts .................................................................................... 4-57
6.4.1 Drum unit .......................................................................................................................... 4-57
6.4.2 Printer body & Paper tray .................................................................................................. 4-57
7. INCORRECT PRINTOUT ........................................................................................4-58
8. NETWORK PROBLEM............................................................................................4-60
8.1 Installation Problem ....................................................................................................... 4-60
8.2 Printing Problem............................................................................................................. 4-63
8.3 Protocol-Specific Troubleshooting ................................................................................. 4-65
8.4 Wireless Network Troubleshooting ................................................................................ 4-66
iv
Confidential