Brother MFC-9840CDW, DCP-9045CDN CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTING, REQUIRED AFTER PARTS REPLACEMENT, CHAPTER 5 SERVICE FUNCTIONS

CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTING,

	REQUIRED AFTER PARTS REPLACEMENT	....................4-1
1.	IF YOU REPLACE THE MAIN PCB............................................................................	4-1
2.	IF YOU REPLACE THE ENGINE PCB .....................................................................	4-11
3.	IF YOU REPLACE THE FB UNIT .............................................................................	4-14

CHAPTER 5 SERVICE FUNCTIONS .......................................................				5-1
1. MAINTENANCE MODE ..............................................................................................				5-1
1.1 How to Enter the Maintenance Mode .................................................................................				5-1
1.2 How to Enter the 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	Printout of Scanning Compensation Data (Function code 05).................................		5-4
	1.4.3	Placement of Scanner Unit Position for Transportation (Function code 06)............		5-6
	1.4.4 ADF Performance Test (Function code 08) .............................................................			5-6
	1.4.5	Test Pattern (Function code 09)...............................................................................		5-7
	1.4.6	Worker Switch (WSW) Setting and Printout.............................................................		5-8
	1.4.7	Operational Check of LCD (Function code 12) ......................................................		5-11
	1.4.8	Operational Check of Control Panel Button (Function code 13) ............................		5-12
	1.4.9 ROM Version Check (Function code 25) ...............................................................			5-13
	1.4.10	Drum Unit Cleaning (Function code 31)...............................................................		5-14
	1.4.11	Operational Check of Sensors (Function code 32) ..............................................		5-15
	1.4.12	Switching of the USB Transfer Speed in the PictBridge Mode/
		(Function code 45) ...............................................................................................		5-19
	1.4.13 EEPROM Customizing (User-accessible) (Function code 52) ............................			5-20
	1.4.14 Received Data Transfer Function (Function code 53) (MFC-9840CDW only) ....			5-21
	1.4.15	Fine Adjustment of Scan Start/End Positions (Function code 54) .......................		5-23
	1.4.16	Acquisition of White Level Data and CCD Scanner Area Setting
		(Function code 55) ...............................................................................................		5-25
	1.4.17	Adjustment of Color Registration (Maintenance Mode 66) ..................................		5-26
	1.4.18	Paper Feeding and Ejecting Test (Function code 67)..........................................		5-28
	1.4.19	Sensitivity Adjustment of Density Sensor (Function code 72) (Don’t use)...........		5-28
	1.4.20 EEPROM Customizing (Function code 74)..........................................................			5-29
	1.4.21	Sensitivity Adjustment of Registration-mark Sensor (Function code 75).............		5-30
	1.4.22	Operational Check of Fans (Function code 78) ...................................................		5-32
	1.4.23	Display of the Machine’s Log Information (Function code 80) .............................		5-34
	1.4.24	Error Code Indication (Function code 82) ............................................................		5-36
	1.4.25	Developing Bias Voltage Correction (Function code 83) .....................................		5-36
	1.4.26	Output of Transmission Log to the Telephone Line (Function code 87)..............		5-37
	1.4.27	Exit from the Maintenance Mode (Function code 99) ..........................................		5-37
		vi	Confidential