Brother MFC-9340CDW Service Manual

2-3
Confidential
1.2 Initial Check
Check the following items before attempting to repair the machine.
■ Operating environment
(1) Put your machine on a flat, stable surface such as a desk that is free of vibration and
shocks.
(2) Use the machine in a well-ventilated room; use the machine within the following ranges of
temperature and humidity: temperature between 10 °C and 32.5 °C (50 °F to 90.5 °F),
and the relative humidity is maintained between 20 % and 80 %.
(3) Ensure the machine is not exposed to direct sunlight, excessive heat, moisture, or dust.
(4) Keep the machine horizontal when you carry it.
■ Power supply
(1) The AC input power supply described on the rating plate of the machine 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) A recommended type of paper is being used. (Refer to "1.5.2 Media specifications" in
Chapter 1.)
(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 surface of optical devices such as the lens, reflecting mirror, and
protection glass may cause light print image.
- Condensation on the optical surfaces such as the LED array 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 two 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.

Brother MFC-9340CDW Specifications

Printing Specifications

print speed (black)	up to 23 ppm
print speed (color)	up to 23 ppm
print resolution	up to 600 x 2400 dpi
automatic duplex printing	Yes

Copying Specifications

copy speed (black)	up to 23 cpm
copy speed (color)	up to 23 cpm
copy resolution	600 x 600 dpi
copy reduction/enlargement	25% - 400% in 1% increments

Scanning Specifications

scanner type	Color Flatbed with ADF
document glass size	8.5” x 11.7”
scan resolution (optical)	1200 x 2400 dpi
scan resolution (interpolated)	19200 x 19200 dpi

Fax Specifications

fax modem	33.6k bps
fax page memory	up to 500 pages
speed dial locations	200

Memory and Interfaces

memory (standard/max)	192MB / 192MB
standard interfaces	Wireless 802.11b/g/n, Ethernet, Hi-Speed USB 2.0
usb direct interface	Yes

Supplies and Accessories

black toner cartridge yield	2, 500 pages
cyan toner cartridge yield (standard)	1, 400 pages
magenta toner cartridge yield (standard)	1, 400 pages
yellow toner cartridge yield (standard)	1, 400 pages
cyan toner cartridge yield (high capacity)	2, 200 pages
magenta toner cartridge yield (high capacity)	2, 200 pages
yellow toner cartridge yield (high capacity)	2, 200 pages
drum unit yield	15, 000 pages
belt unit yield	50, 000 pages
waste toner box yield	50, 000 pages
multi-purpose paper	Letter, 500 sheets