Chapter 5 Service Functions - Brother DCP-7055 Service Manual

1.5 Inputting the Adjusted Value of the Laser Unit ................................................................... 4-4
1.6 Acquisition of White Level Data (Maintenance Mode: Code 55) ........................................ 4-5
1.7 Operation Check of Sensors (Maintenance Mode: Code 32) ............................................. 4-5
2. IF YOU REPLACE THE LASER UNIT ..................................................................................... 4-6
2.1 Inputting the Adjusted Value of the Laser Unit ................................................................... 4-6
3. IF THE IRREGULAR SUPPLY DETECTION ERROR IS DETECTED
AND THE LOW VOLTAGE POWER SUPPLY PCB ASSY IS REPLACED ........................... 4-7
3.1 Reset of Irregular Power Supply Detection Counter ........................................................... 4-7
3.1.1 Reset of irregular power supply detection counter using the PJL file ..................... 4-7
3.1.2 Reset of irregular power supply detection counter using the maintenance tool ..... 4-7
4. IF YOU REPLACE THE DOCUMENT SCANNER UNIT ......................................................... 4-9
4.1 Acquisition of White Level Data (Maintenance Mode: Code 55) ........................................ 4-9
4.2 Scanning and Printing Check ............................................................................................. 4-9
4.3 Placement of Scanner Unit in Position for Transportation (Maintenance Mode: Code 06) 4-9
5. IF YOU REPLACE THE PANEL UNIT ..................................................................................... 4-9
5.1 Operation Check of LCD (Maintenance Mode: Code 12) ................................................... 4-9
5.2 Operation Check of Control Panel Button (Maintenance Mode: Code 13) ......................... 4-9
6. IF YOU REPLACE THE LCD UNIT ........................................................................................ 4-10
6.1 Operation Check of LCD (Maintenance Mode: Code 12) ................................................. 4-10
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE ........................................................................................................... 5-1
1.1 How to Enter the Maintenance Mode ................................................................................. 5-1
1.2 How to Enter the End 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 in position for transportation (Function code 06) ......... 5-6
1.4.4 ADF performance test (Function code 08) ............................................................. 5-6
1.4.5 Monochrome image quality test pattern (Function code 09) .................................. 5-7
1.4.6 Worker switch (WSW) setting and printout (Function code 10, 11) ........................ 5-8
1.4.7 Operational check of LCD (Function code 12) ..................................................... 5-12
1.4.8 Operational check of control panel button (Function code 13) ............................. 5-13
1.4.9 Adjustment of Handset Volume (Function code 16)
(Only for handset models) .................................................................................... 5-14
1.4.10 Software version check (Function code 25) ......................................................... 5-15
1.4.11 Operational check of sensors (Function code 32) ................................................ 5-16
1.4.12 LAN connection status display (Function code 33) .............................................. 5-18
1.4.13 PC print function (Function code 43) .................................................................... 5-19
1.4.14 Not-disclosed-to-users functions (Function code 45) ........................................... 5-22
1.4.15 EEPROM customizing (User-accessible) (Function code 52) .............................. 5-23
1.4.16 Received data transfer function (Function code 53) (FAX model only) ................ 5-24
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