Brother HL-3040CN Service Manual page 353

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..............................................................................7-1
1.1 How to Enter the Maintenance Mode ......................................................................... 7-1
1.2 How to Enter the End User-accessible Maintenance Mode ....................................... 7-1
1.3 List of Maintenance-mode Functions.......................................................................... 7-2
1.4 Detailed Description of Maintenance-mode Functions ............................................... 7-3
1.4.1 EEPROM parameter initialization (Function code 01, 91) ................................. 7-3
1.4.2 Monochrome image quality test pattern (Function code 09).............................. 7-4
1.4.3 Worker switch (WSW) setting and printout (Function code 10, 11) ................... 7-5
1.4.4 Operational check of LCD (Function code 12) .................................................. 7-8
1.4.5 Operational check of control panel button (Function code 13) .......................... 7-9
1.4.6 Software version check (Function code 25)..................................................... 7-10
1.4.7 "One Push Demo" setting (Function code 28) ................................................. 7-11
1.4.8 Operational check of sensors (Function code 32) ........................................... 7-12
1.4.9 Not-disclosed-to-users functions (Function code 45) ...................................... 7-15
1.4.10 Adjustment of color registration (Function code 66) ...................................... 7-19
1.4.11 Continuous print test (Function code 67) ....................................................... 7-22
1.4.12 LED test pattern print (Function code 68)...................................................... 7-24
1.4.13 Frame pattern print (Function code 69) ......................................................... 7-26
1.4.14 Color test pattern (Function code 71) ............................................................ 7-28
1.4.15 Sensitivity adjustment of density sensor (Function code 72)......................... 7-30
1.4.16 Setting by country (Function code 74)........................................................... 7-31
1.4.17 Sensitivity adjustment of registration mark sensor and check of belt surface
(Function code 75)........................................................................................... 7-33
1.4.18 Operational check of fans (Function code 78)............................................... 7-35
1.4.19 Display of the machine's log (Function code 80) ........................................... 7-36
1.4.20 Error code indication (Function code 82)....................................................... 7-40
1.4.21 Developing bias voltage correction (Function code 83)................................. 7-41
1.4.22 Exit from the maintenance mode (Function code 99).................................... 7-42
CHAPTER 7
SERVICE FUNCTIONS
CONTENTS
Confidential