Quick Links. Table of Contents. Multi-protocol on-board multi-function print server 94 pages. Multi-protocol on-board multi-function print server 83 pages. Brother owner's manual fax machine fax, fax, mfc, fax e-mail pages.
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PREFACE This Service Manual is intended for use by service personnel and details the specifications, construction, theory of operation, and maintenance for the Brother machines noted on the front cover.
It includes information required for troubleshooting and service--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, repair the equipment in a timely manner and order spare parts as necessary. To perform appropriate maintenance so that the machine is always in the best possible condition for the customer, service personnel must adequately understand and apply this manual. Contains external views and names of components and describes their functions.
Information about the keys on the control panel is included to help you check operation or make adjustments. Lists the specifications of each model, which enables you to make a comparison of different models. Gives an overview of the scanning and printing mechanisms as well as the sensors, actuators, and control electronics.
It aids in understanding the basic principles of operation as well as locating defects for troubleshooting. Describes how to transfer data left in the machine to be sent for repair. The service personnel should instruct end users to follow the transfer procedure given in this chapter if the machine at the user site cannot print received data due to the printing mechanism defective.
End users can transfer received data to another machine to prevent data loss. Details procedures for disassembling and reassembling the machine together with related notes. The disassembly order flow provided enables you to see at a glance the quickest way to get to component s involved. At the start of a disassembly job, you check a disassembly order flow that guides you through a shortcut to the object components. This chapter also covers screw tightening torques and lubrication points to which the specified lubricants should be applied during reassembly jobs.
Provides cleaning procedures not covered by the User's Manual. Before starting any repair work, clean the machine as it may solve the problem concerned. Describes the maintenance mode which is exclusively designed for the purpose of checks, settings and adjustments using the keys on the control panel. In addition, you can perform operational checks of the LCD, control panel PCB or sensors, perform a print test, display the log information or error codes, and modify firmware switches WSW.
Details error messages and codes that the incorporated self-diagnostic functions display if any error or malfunction occurs. If any error message appears, refer to this chapter to find which components should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main sections of the machine and related troubleshooting procedures. This will help service personnel pinpoint and repair defective components. Shows the location of serial number labels put on some parts and lists the coding information pertaining to the serial numbers.
No hardware replacement is required for updating. Lists the customizing codes for the various preferences exclusively designed for each destination e. If the main PCB is replaced with a new one, therefore, you will need to set the proper customizing codes with the machine in the maintenance mode. Describes the functions of the firmware switches, which can be divided into two groups: one is for customizing preferences designed for the shipping destination as described in Appendix 3 and the other is for modifying preferences that match the machine to the environmental conditions.
Use the latter group if the machine malfunctions due to mismatching. Provides the wiring diagram that helps you understand the connections between PCBs. This manual describes the models and their versions destined for major countries. The specifications and functions are subject to change depending upon each destination. General Specifications Paper Specifications Printable Area Print System and Transfer System Paper Transportation System Fusing Unit Basic Structure Control System Safety Precautions AC Cord OPC Belt Cartridge Paper Tray Side Cover LR Top Side L ADF Unit Scanner Unit Replacement of Fusing Unit Printout of Scanning Compensation Data Function mode Test Pattern 1 Function mode Firmware Switch Setting and Printout Firmware switch setting Function mode Printout of firmware switch data Function mode Sensor Operational Check Function mode Function mode Equipment Errors Error messages appearing on the LCD Communications Errors Checking Prior to Troubleshooting Troubleshooting Based on Problem Type Software setting problems Image failure Paper transport error Incorrect printout Network problem Troubleshooting of the control panel Troubleshooting of fax functions Before you clean the inside of the machine, make sure you have unplugged the telephone line cord first and then the power cord from the AC power outlet.
Do not handle the plug with wet hands. Doing this might cause an electrical shock. The fusing unit becomes extremely hot during operation. Wait until it has cooled down sufficiently before replacing consumable items. The fusing unit is marked with a caution label.
Please do not remove or damage the label. To prevent injuries, be careful not to put your hands on the edge of the machine under the document cover or scanner unit. To prevent injuries, be careful not to put your fingers in the area shown in the illustrations. Do not use a vacuum cleaner to clean up scattered toner.
Doing this might cause the toner dust to ignite inside the vacuum cleaner, potentially starting a fire. Please carefully clean the toner dust with a clean dry soft, lint-free cloth and dispose of it according to local regulations.
To prevent injuries, use at least two people to lift the machine. Be careful not to trap your fingers when you set the machine back down. When you lift the machine make sure you use the handholds at the bottom four corners of the machine. Keep the machine horizontal when you carry it.
Never install telephone wiring during a lightning storm. Never install a telephone wall jack in a wet location. This product must be installed near an AC power outlet that is easily accessible. In case of an emergency, you must disconnect the power cord from the AC power outlet to shut off the power completely.
To reduce the risk of shock or fire, use only a No. We recommend that you use a quality surge protection device on the AC power line and on the telephone line, or unplug the cords during a lightning storm. Do not use this product near water, for example, near a bath tub, wash bowl, kitchen sink or washing machine, in a wet basement or near a swimming pool. Avoid using this product during an electrical storm. There may be a remote risk of electric shock from lightning.
Do not use this product to report a gas leak in the vicinity of the leak. Use only the power cord provided with the machine. Put the machine near a telephone wall jack and a standard, grounded AC power outlet.
Choose a location where the temperature remains between 50F and Do not place the machine near heaters, air conditioners, refrigerators, water, chemicals or devices that contain magnets or generate magnetic fields. Do not expose the machine to direct sunlight, excessive heat, open flames, salty or corrosive gasses, moisture, or dust.
Brother MFC9420CN Service Manual
PREFACE This Service Manual is intended for use by service personnel and details the specifications, construction, theory of operation, and maintenance for the Brother machines noted on the front cover. It includes information required for troubleshooting and service--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, repair the equipment in a timely manner and order spare parts as necessary. To perform appropriate maintenance so that the machine is always in the best possible condition for the customer, service personnel must adequately understand and apply this manual. Contains external views and names of components and describes their functions. Information about the keys on the control panel is included to help you check operation or make adjustments. Lists the specifications of each model, which enables you to make a comparison of different models.