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vii

Confidential

1.4.12 Received Data Transfer Function (Function code 53)

(MFC-7840W/7840N/7450/7440N/7340/7320 only) ............................................. 5-22

1.4.13 Fine Adjustment of Scan Start/End Positions (Function code 54) ........................ 5-24

1.4.14 Acquisition of White Level Data (Function code 55) ............................................. 5-26

1.4.15 Paper Feeding and Ejecting Test (Function code 67) .......................................... 5-26

1.4.16 EEPROM Customizing (Function code 74) .......................................................... 5-27

1.4.17 Operational Check of Fans (Function code 78) .................................................... 5-29

1.4.18 Display of the Machine's Log Information (Function code 80) .............................. 5-31

1.4.19 Error Code Indication (Function code 82) ............................................................ 5-33

1.4.20 Output of Transmission Log to the Telephone Line (Function code 87)

(only MFC7840W/7840N/7450/7440N/7340/7320) .............................................. 5-33

1.4.21 Exit from the Maintenance Mode (Function code 99) ........................................... 5-34

2. OTHER SERVICE FUNCTIONS ................................................................................................ 5-35

2.1 User Maintenance Mode ................................................................................................... 5-35

2.2 Resetting the developing bias voltage counter ................................................................. 5-36

CHAPTER 6 CIRCUIT DIAGRAMS, WIRING DIAGRAM ................................... 6-1

APPENDIX 1 WORKER SWITCH Settings (WSW) ................................... App. 1-1

APPENDIX 2 DELETION OF PERSONAL INFORMATION ....................... App. 2-1

APPENDIX 3 SERIAL NUMBERING SYSTEM .......................................... App. 3-1

APPENDIX 4 SCREW CATALOGUE ......................................................... App. 4-1

APPENDIX 5 GLOSSARY .......................................................................... App. 5-1

APPENDIX 6 REFERENCES ...................................................................... App. 6-1

Brother MFC-7450 Service Manual

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