Mitsubishi LT2-250 - Knife Meshing Pressure and Sharpening

TROUBLESHOOTING TABLE
Item
Trouble
Cause
Remedy
Refer to
A
The motor does not run
at all while the power
Is turned on (buzz is
not heard).
The motor is not fed
with the power supply.
1. Check the power
supply connection.
2. Check the power
switch and phase
reversing plug for
contact condition.
7 on page 8.
7 on page 8.
Motor winding is open.
Replace the motor.
B
The sewing machine runs
though the motor
control lever is not
operated.
Control box is trouble.
Replace the control box.
C
The sewing machine
does not run at ail.
The pedal switch and
its lever are misaligned
and S1 is not actuated.
Adjust the pedal switch
and its lever.
4 on page 18.
Clutch connector is
disconnected.
Check the clutch connector
setting.
D
The motor runs in the
reverse direction.
—
Remove the phase reversing
plug,turn it 180® and set
again.
7 on page 8.
E
Needle does not stop at
DOWN position.
The pedal switch and its
lever are misaligned and
S1 remains closed.
Adjust the pedal switch and
its lever.
4 on page 18.
Synchronizer is
trouble.
Replace the synchronizer.
8 on page 8.
F
The sewing machine is
not braked, but stops
after running with
innertia.
Brake does not work.
1. Check the brake
connector.
2. Replace the control box.
G
The sewing machine
stops with needle at
UP position.
82 is closed.
Adjust the pedal switch
and/or its lever.
4 on page 18.
Position switch is set
at •!-£• position.
Set the position switch to
^ position.
1 on page 15.
Synchronizer is installed
improperly.
Adjust position of the
synchronizer.
8 on page 8.
H
The pedal switch cannot
be fully pressed down
by toe.
Stopper and pedal switch
are misaligned.
Properly align the stopper
and pedal switch.
4 on page 18.
-19-
From the library of: Superior Sewing Machine & Supply LLC