Brother HL-4140CN Service Manual page 313

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
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