Maintenance Mode - Brother HL-4140CN Service Manual

Describes the maintenance mode which is exclusively designed for the purpose of checking the settings
and adjustments using the buttons on the control panel.
This chapter also covers not-disclosed-to-users function menus, which activate settings and functions or
reset the parts life.
1. MAINTENANCE MODE..............................................................................5-1
1.1 How to Enter the Maintenance Mode ......................................................................... 5-1
1.2 How to Enter the End User-accessible Maintenance Mode ....................................... 5-1
1.3 List of Maintenance-mode Functions.......................................................................... 5-2
1.4 Detailed Description of Maintenance-mode Functions ............................................... 5-3
1.4.1 EEPROM parameter initialization (Function code 01, 91) ................................. 5-3
1.4.2 Monochrome image quality test pattern (Function code 09).............................. 5-4
1.4.3 Worker switch (WSW) setting and printout (Function code 10, 11) ................... 5-5
1.4.4 Operational check of LCD (Function code 12) .................................................. 5-8
1.4.5 Operational check of control panel button (Function code 13) .......................... 5-9
1.4.6 Software version check (Function code 25)..................................................... 5-10
1.4.7 "One Push Demo" setting (Function code 28) ................................................. 5-11
1.4.8 Operational check of sensors (Function code 32) ........................................... 5-12
1.4.9 LAN connection status display (Function code 33).......................................... 5-15
1.4.10 Printout of EEPROM log (Function code 40)................................................. 5-16
1.4.11 Not-disclosed-to-users functions (Function code 45)..................................... 5-17
1.4.12 Adjustment of inter-color position alignment (Function code 66)................... 5-21
1.4.13 Continuous print test (Function code 67)....................................................... 5-25
1.4.14 Laser unit test pattern print (Function code 68) ............................................. 5-28
1.4.15 Frame pattern print (One-sided) (Function code 69) ..................................... 5-29
1.4.16 Frame pattern print (Two-sided) (Function code 70) ..................................... 5-31
1.4.17 Color test pattern (Function code 71) ............................................................ 5-33
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
CHAPTER 5
SERVICE FUNCTIONS
CONTENTS
Confidential