Brother HL-4140CN Service Manual page 8

1.4.18 Sensitivity adjustment of density sensor (Function code 72)......................... 5-35
1.4.19 Setting by country (Function code 74)........................................................... 5-36
1.4.20 Sensitivity adjustment of registration mark sensor and check of
belt unit surface (Function code 75) .............................................................. 5-38
1.4.21 Printout of maintenance information (Function code 77)............................... 5-40
1.4.22 Operational check of fans (Function code 78)............................................... 5-42
1.4.23 Display of machine history (log) (Function code 80) ..................................... 5-43
1.4.24 Error code indication (Function code 82)....................................................... 5-47
1.4.25 Developing bias voltage correction (Function code 83)................................. 5-48
1.4.26 Exit from the maintenance mode (Function code 99).................................... 5-49
2. OTHER SERVICE FUNCTIONS...............................................................5-50
2.1 Service Function Menus Enabled by Pressing Button (s)
When Turning the Printer On.................................................................................... 5-50
2.2 Developer Roller Counter Reset Function ................................................................ 5-52
2.3 Parts Life Reset Function ......................................................................................... 5-54
2.4 Printout of Printer Settings........................................................................................ 5-55
2.5 Deletion of User Setting Information, etc. ................................................................. 5-63
2.6 How to Recover from Errors of the Fuser Unit ......................................................... 5-64
2.7 Switching of Return Value of USB No./Support for Banding..................................... 5-65
2.8 Drum Cleaning.......................................................................................................... 5-67
2.9 Deep Sleep Function ................................................................................................ 5-68
CHAPTER 6 CIRCUIT DIAGRAMS & WIRING DIAGRAM
1. CIRCUIT DIAGRAMS.................................................................................6-1
2. WIRING DIAGRAM ....................................................................................6-6
CHAPTER 7 PERIODICAL MAINTENANCE
1. PRECAUTIONS..........................................................................................7-1
2. PERIODICAL REPLACEMENT PARTS ....................................................7-2
2.1 Procedures to Replace Periodical Replacement Parts............................................... 7-2
2.1.1 Fuser unit........................................................................................................... 7-3
2.1.2 Laser unit......................................................................................................... 7-11
2.1.3 Paper feeding kit1............................................................................................ 7-24
2.1.4 Paper feeding kit2............................................................................................ 7-27
2.1.5 MP paper feeding kit........................................................................................ 7-30
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