Brother HL-L8250CDN Service Manual page 9

CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE..............................................................................5-1
1.1 How to Enter the Maintenance Mode ......................................................................... 5-1
1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel .............. 5-1
1.1.2 How to Enter the End User-accessible Maintenance Mode .............................. 5-2
1.2 List of Maintenance-mode Functions.......................................................................... 5-3
1.3 Detailed Description of Maintenance-mode Functions ............................................... 5-4
1.3.1 EEPROM parameter initialization (Function code 01, 91) ................................. 5-4
1.3.2 Monochrome image quality test pattern (Function code 09).............................. 5-5
1.3.3 Worker switch (WSW) setting and printout (Function code 10, 11) ................... 5-6
1.3.4 Operational check of LCD (Function code 12) .................................................. 5-8
1.3.5 Operational check of control panel key (Function code 13)............................. 5-10
1.3.6 Software version check (Function code 25)..................................................... 5-11
1.3.7 "One Push Demo" setting (Function code 28) ................................................. 5-12
1.3.8 Operational check of sensors (Function code 32) ........................................... 5-13
1.3.9 LAN connection status display (Function code 33).......................................... 5-16
1.3.10 EEPROM Dump Print (Function code 40) ..................................................... 5-17
1.3.11 Backup of machine information (Function code 41)....................................... 5-18
1.3.12 Changing return value of USB No./Switching Dither Pattern/
Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color/
Switching of timing to execute Auto Registration/
Adjusting left-end print start position on second side in duplex printing/
Change of the transfer current setting/Change of ghost reduction setting
(Function code 45) ........................................................................................ 5-21
1.3.13 Motor reset (Function code 57) ..................................................................... 5-28
1.3.14 Adjustment of touch panel (Function code 61)
(Model with touch panel only)........................................................................ 5-29
1.3.15 Adjustment of color registration
(Adjustment of inter-color position alignment) (Function code 66) ................ 5-30
1.3.16 Continuous print test (Function code 67)....................................................... 5-34
1.3.17 Laser unit test pattern print (Function code 68) ............................................. 5-38
1.3.18 Frame pattern print (One-sided) (Function code 69) ..................................... 5-39
1.3.19 Frame pattern print (Two-sided) (Function code 70) ..................................... 5-40
1.3.20 Color test pattern (Function code 71) ............................................................ 5-41
1.3.21 Sensitivity adjustment of density sensor (Function code 72)......................... 5-44
1.3.22 Continuous adjustments of density and registration sensor
(Function code 73) ........................................................................................ 5-45
1.3.23 Setting by country (Function code 74)........................................................... 5-46
1.3.24 Printout of maintenance information (Function code 77)............................... 5-48
1.3.25 Operational check of fans (Function code 78)............................................... 5-50
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