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2. Notes on safety
Use the sewing machine in an area which is free
from sources of strong electrical noise such as
high-frequency welders.
Sources of strong electrical noise may cause prob-
lems with correct operation.
Any fluctuations in the power supply voltage
should be within ±10% of the rated voltage for the
machine.
Voltage fluctuations which are greater than this
may cause problems with correct operation.
The power supply capacity should be greater than
the requirements for the sewing machine's elec-
trical consumption.
Insufficient power supply capacity may cause
problems with correct operation.
Machine installation should only be carried out by
a qualified technician.
Contact your Brother dealer or a qualified electri-
cian for any electrical work that may need to be
done.
The sewing machine weighs more than 31 kg. The
installation should be carried out by two or more
people.
Do not connect the power cord until installation
is complete, otherwise the machine may operate
if the treadle is depressed by mistake, which could
result in injury.
Be sure to connect the ground. If the ground con-
nection is not secure, you run a high risk of receiv-
ing a serious electric shock, and problems with
correct operation may also occur.
CAUTION
Environmental requirements
Installation
DB2-B771A,772A (English)
The ambient temperature should be within the
range of 5°C to 35°C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range
of 45% to 85% during use, and no dew formation
should occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct opera-
tion.
Avoid exposure to direct sunlight during use.
Exposure to direct sunlight may cause problems
with correct operation.
In the event of an electrical storm, turn off the
power and disconnect the power cord from the
wall outlet.
Lightning may cause problems with correct opera-
tion.
All cords should be secured at least 25 mm away
from any moving parts. Furthermore, do not ex-
cessively bend the cords or secure them too firmly
with staples, otherwise there is the danger that fire
or electric shocks could occur.
Install the belt covers to the machine head and
motor.
If using a work table which has casters, the cast-
ers should be secured in such a way so that they
cannot move.
Be sure to wear protective goggles and gloves
when handling the lubricating oil, so that no oil
gets into your eyes or onto your skin, otherwise
inflammation can result.
Furthermore, do not drink the oil under any cir-
cumstances, as it can cause vomiting and diar-
rhoea.
Keep the oil out of the reach of children.
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