Maintenance And Inspection - Brother DB2-B721 Manual De Instrucciones

¡
Maintenance and inspection of the sewing ma-
chine should only be carried out by a qualified
technician.
¡
Ask your Brother dealer or a qualified electri-
cian to carry out any maintenance and inspec-
tion of the electrical system.
¡
Turn off the power switch and disconnect the
power cord from the wall outlet at the follow-
ing times, otherwise the machine may operate
if the treadle is pressed by mistake, which could
result in injury.
¡ When carrying out inspection, adjustment
and maintenance
¡ When replacing consumable parts such as
the rotary hook
* When using a clutch motor, the motor will
keep turning even after the power is
switched off as a result of the motor's iner-
tia. Wait until the motor stops fully before
starting work.
iii
CAUTION

Maintenance and inspection

DB2-B720 series (English)
¡
If the power switch needs to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
¡
Use only the proper replacement parts as speci-
fied by Brother.
¡
If any safety devices have been removed, be
absolutely sure to re-install them to their origi-
nal positions and check that they operate cor-
rectly before using the machine.
¡
Any problems in machine operation which re-
sult from unauthorized modifications to the
machine will not be covered by the warranty.