This service reference manual contains basic information required for after-sales service of
the laser printer (hereinafter referred to as “the machine”). This information is vital to the
service personnel to maintain the high printing quality and performance of the machine.
This service manual covers the DCP 7030/7040/7045N, MFC 7320/7340/7440N/7450/
This manual consists of the following chapters:
REFERENCE 1 SPECIFICATIONS
Provides specifications of each model, which enables you to make a comparison of the
REFERENCE 2 THEORY OF OPERATION
Gives an overview of the printing mechanisms as well as the sensors, actuators, and control
electronics. It aids in understanding the basic principles of operations as well as locating
defects for troubleshooting.
APPENDIX 1 TONER CARTRIDGE WEIGHT INFORMATION
APPENDIX 2 GLOSSARY
APPENDIX 3 REFERENCES
Information in this manual is subject to change due to improvement or redesign of the
product. All relevant information in such cases will be supplied in service information
bulletins (Technical Information).
A thorough understanding of this machine, based on information in this service reference
manual and service information bulletins, is required for maintaining the print quality
performance and for improving the practical ability to find the cause of any problems.