Checks Before Commencing Troubleshooting - Brother HL-5440D Service Manual

1.2

Checks before Commencing Troubleshooting

Check the following items before commencing repairs on the machine.
Operating environment
(1) The machine is placed on a flat, stable surface.
(2) The machine is used in a clean environment where the temperature is between 10°C
(50°F) and 32.5°C (90.5°F) and the relative humidity is maintained between 20% and
80%.
(3) The machine is not exposed to direct sunlight, excessive heat, moisture, or dust.
(4) Hold the machine level while moving it.
Power supply
(1) Power described on the rating label attached on the machine is supplied. Power
fluctuation should be within ±10% of the rated voltage.
(2) The AC input power supply is within the regulated value.
(3) The cables and harnesses are connected correctly.
(4) The fuses are not blown.
Paper
(1) The recommended type of paper is being used. (Refer to
Chapter 1.)
(2) The paper is not damp.
(3) Short-grained paper or acid paper is not used.
Consumable parts
(1) The drum unit (including the toner cartridge) is set correctly.
"1.5.2 Media specifications" in
2-2
Confidential