Brother FAX-2840 Service Manual page 7

9.37 T1 clutch ASSY, Registration clutch ASSY ....................................................................... 3-68
9.38 Main frame L ASSY ........................................................................................................... 3-70
9.39 Develop drive sub ASSY, Develop gear joint/52 ............................................................... 3-72
9.40 Motor drive sub ASSY, Main motor ................................................................................... 3-74
9.41 Internal temperature thermistor ......................................................................................... 3-76
9.42 Eject sensor PCB ASSY .................................................................................................... 3-77
9.43 Fuser gear 28/34 ............................................................................................................... 3-79
CHAPTER 4 ADJUSTMENTS AND UPDATING SETTINGS
AS REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY .................................................................................. 4-1
1.1 Rewriting the firmware (main firmware, demo firmware) ..................................................... 4-2
1.1.1 Checking firmware version .................................................................................... 4-2
1.1.2 Rewriting the firmware using computer ................................................................. 4-2
1.2 Initialization of EEPROM of Main PCB ASSY (Function Code: 01)..................................... 4-3
1.3 Setting by Country (Function Code: 74) .............................................................................. 4-3
1.4 Setting the Serial Number and Entering the Adjusted Value of the Laser Unit.................... 4-4
1.5 Acquisition of White Level Data (Function Code: 55) .......................................................... 4-5
1.6 Operational Check of Sensors (Function Code: 32) ............................................................ 4-5
2. IF YOU REPLACE THE LASER UNIT ......................................................................................... 4-6
2.1 Entering the Adjusted Value of the Laser Unit..................................................................... 4-6
3. IF YOU REPLACE THE LOW VOLTAGE POWER SUPPLY PCB ASSY .................................. 4-8
3.1 Reset of Irregular Power Supply Detection Counter............................................................ 4-8
4. IF YOU REPLACE THE CIS UNIT ............................................................................................... 4-9
4.1 Acquisition of White Level Data (Function Code: 55) .......................................................... 4-9
4.2 Scanning and Printing Check .............................................................................................. 4-9
4.3 Scanning Lock (Function Code: 06) .................................................................................... 4-9
5. IF YOU REPLACE THE PANEL UNIT ....................................................................................... 4-10
5.1 Operational Check of LCD (Function Code: 12) ................................................................ 4-10
5.2 Operational Check of Control Panel Buttons (Function Code: 13) .................................... 4-10
6. IF YOU REPLACE THE LCD UNIT............................................................................................ 4-11
6.1 Operational Check of LCD (Function Code: 12) ................................................................ 4-11
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 end-user accessible maintenance mode ................................... 5-1
1.1.2 How to enter the maintenance mode for service personnel .................................. 5-1
1.2 List of Maintenance-mode Functions................................................................................... 5-2
1.3 Detailed Description of Maintenance-mode Functions ........................................................ 5-3
1.3.1 EEPROM parameter initialization (Function code: 01, 91) .................................... 5-3
1.3.2 Printout of scanning compensation data (Function code: 05) ............................... 5-4
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