Brother International HL-4000CN Service Manual - Page 17

Service call procedures 1. Notes Before Work 1.1 Safety notes To prevent an accident during maintenance, follow warnings and precautions strictly. Avoid dangerous work. 1. Power supply To prevent an electric shock, burn, or injury, turn off the power and unplug the power cable before maintenance work. If it is inevitable to keep the power on for voltage measurement, take the greatest care not to receive an electric shock. 2. Drive Never inspect or lubricate drive components such as gears when the machine is in operation. 3. Heavy parts The machine weighs 35.3 kg. When lifting the machine, get a firm footing and bend your knees to avoid possible injuries to your back. 4. Safety devices Ensure the safety functions of safety devices for preventing mechanical accidents (fuses, circuit breakers, and interlock switches) and for safe user operations (panels and covers). Do not make mechanical alterations that may impair the safety functions. 5. Parts mounting and removal Parts and covers may have sharp edges. Do not touch the edges readily. If your fingers or hands become greasy, wipe off the grease well. Do not pullout a part cable forcibly but gradually. 6. Specified tool Follow instructions if a tool is specified. 7. Organic solvents Use the drum cleaner and other organic solvents carefully with the following notes in mind: • Keep the room well ventilated not to breathe in vapor a lot or continuously. • The solvents are inflammable liquids. Do not put them close to or into a fire or do not heat their containers. • Avoid storing the solvents near a naked fire or sparks because they may catch fire. 8. Irregular use of machine When altering the machine, submit an application for irregular use in advance. viii