Brother DCP-9040CN Service Manual page 21

<Paper>
(1) A recommended type of paper is being used. (Refer to
(2) The paper is not damp.
(3) The paper is not short-grained paper or acid paper.
<Consumable Parts>
(1) The drum unit (including the toner cartridge) is installed correctly.
(2) The belt unit and waste toner box are installed correctly.
<Others>
(1) Condensation
When the machine is moved from a cold place into a warm room, condensation may occur
inside the machine, causing various problems as listed below.
- Condensation on the optical surfaces such as the scanner window, lenses, the reflection
mirror and the protection glass may cause the print image to be light.
- If the exposure drum is cold, the electrical resistance of the photosensitive layer is
increased, making it impossible to obtain the correct contrast when printing.
- Condensation on the charge unit may cause corona charge leakage.
- Condensation on the plate and separation pad may cause paper feed problems.
If condensation has occurred, leave the machine for at least 2 hours to allow it to reach
room temperature.
If the drum unit is unpacked soon after it is moved from a cold place to a warm room,
condensation may occur inside the unit which may cause incorrect images. Instruct the
user to allow the unit to come to room temperature before unpacking it. This will take one
or two hours.
(2) Low temperature
If the room temperature is low the motor may not drive normally, this is due to there being
too much load to drive the drum unit. In this case, the "Low Temperature/ Increase room
temperature to allow the machine to operate" message will appear on the LCD.
Increase the room temperature when the above message is indicated.
(3) Cleaning
Use a soft dry cloth.
CAUTION:
DO NOT use any type of spray to clean inside or outside of the machine. Doing this may
cause a fire or electrical shock.
"2.6 Paper" in Reference
1-2
1.)
Confidential