Brother HL-4140CN Service Manual page 297

ADJUSTMENTS AND UPDATING OF SETTINGS,
REQUIRED AFTER PARTS REPLACEMENT
This chapter describes adjustments and updating of settings, which are required if the main PCB ASSY
and some other parts have been replaced. This chapter also covers how to update the firmware.
1. IF YOU REPLACE THE MAIN PCB ASSY ................................................4-1
1.1 Rewriting the Firmware (Sub Firmware, Main Firmware) ........................................... 4-2
1.1.1 Checking firmware version ................................................................................ 4-2
1.1.2 Rewriting the firmware using computer ............................................................. 4-2
1.1.3 Rewriting the firmware using USB flash memory .............................................. 4-3
1.2 Initialization of EEPROM of Main PCB ASSY (Maintenance Mode: Code 01) ........... 4-4
1.3 Setting by Country (Maintenance Mode: Code 74) .................................................... 4-4
1.4 Setting the Serial Number .......................................................................................... 4-4
1.5 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72).................. 4-6
1.6 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) . 4-6
1.7 Performing the Adjustment of Inter-color Position Alignment
(Maintenance Mode: Code 66) ................................................................................... 4-6
2. IF YOU REPLACE THE REGISTRATION MARK SENSOR
HOLDER ASSY ..........................................................................................4-6
2.1 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72).................. 4-6
2.2 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) . 4-6
2.3 Performing the Adjustment of Inter-color Position Alignment
(Maintenance Mode: Code 66) ................................................................................... 4-6
3. IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY4-7
3.1 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72).................. 4-7
3.2 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) . 4-7
3.3 Performing the Adjustment of Inter-color Position Alignment
(Maintenance Mode: Code 66) ................................................................................... 4-7
4. IF YOU REPLACE THE LASER UNIT .......................................................4-8
4.1 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72).................. 4-8
4.2 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83) . 4-8
4.3 Performing the Adjustment of Inter-color Position Alignment
(Maintenance Mode: Code 66) ................................................................................... 4-8
CHAPTER 4
CONTENTS
Confidential