Adjustment - Brother BAS-342G Service Manual

7. ADJUSTMENT

7. ADJUSTMENT
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord before carrying out the following operations.
If the foot switch is depressed by mistake, the sewing
machine might start operating and injury could result.
• Inspection, adjustment and maintenance
• Replacing consumable parts such as the rotary
hook
Disconnect the air hoses from the air supply and wait
for the needle on the pressure gauge to drop to "0"
before carrying out inspection, adjustment and repair
of any parts which use the pneumatic equipment.
If the power switch and air need to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
7-1. Checking the safety switch
85
CAUTION
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may become unbalanced and fall
down, and serious injury or damage to the sewing
machine may result.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin. If the oil
and grease get into your eyes or onto your skin,
inflammation can result.
Furthermore, do not drink or eat the lubricating oil or
grease. They may cause diarrhea or vomiting.
Keep the oil out of the reach of children.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
1. If the machine head is tilted back, gently return it to its
original position.
2. Turn on the power switch.
3. Check that no error numbers are displayed on the
operation panel.
< If error [E050], [E051] or [E055] is displayed >
If the safety switch (1) is not turned on, error [E050], [E051]
or [E055] will occur.
Check the installation position of the safety switch (1).
1) Turn off the power switch.
2) Loosen the two screws (2).
3) Push down the right side of the safety switch (1) so that
the safety switch (1) turns on, and then tighten the two
screws (2).
4) Turn on the power and check that no error numbers are
displayed.
3989M
BAS-342G