Brother HL-4000CN, Service Manual

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viii
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:
x
Keep the room well ventilated not to breathe in vapor a lot or continuously.
x
The solvents are inflammable liquids. Do not put them close to or into a fire or
do not heat their containers.
x
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.