Mitsubishi LT2-250 - Needle Gauge Change Procedure

Item
Trouble
Cause
Remedy
Refer to
1 The motor runs faintly
and stops.
Single-phase operation.
Check the power supply
line (particularly, switch
and plug).
J
Needles do not stop at
the same position at all
times.
VR In the control box
Is not properly set.
Brake gap is wide.
Properly set the VR In the
control box.
Correct the gap.
2 on page 15.
K
Corner stitching Is
Impossible (Inching
Is Impossible).
Lever switch does not
function.
Check alignment of the
lever.
4 on page 18.
DIP switches In the
control box are set
Improperly.
Set the DIP switches
properly by following
the right column.
6 on page 7.
( 1 on page 12 and
2 on page 13.)
Corner stitching switch
is not close.
Close the corner stitching
switch.
1 on page 9.
Step setting Is "0" or
"9".
Properly set the steps (1 —8
steps).
1 on page 9.
The control box or the
operation panel is
defective.
Replace the control box
or the operation panel.
L
Single needle stitching
Is Impossible.
The operation paneni Is
defective.
Replace the operation panel
Connector Is dis
connected.
Check the connector. 5 on page 7.
Needle select mechanism
Is misaligned.
Adjust the needle select
mechanism.
1 on page 14.
M
Corner stitching does
not stop.
Synchronizer Is
trouble.
Replace the syn
chronizer.
N
Automatic presser
foot lifter does not
work.
Connector Is dis
connected.
Check the connector.
5 on page 7.
Automatic presser foot
lifter mechanism Is mis
aligned.
Adjust the mechanism.
DIP switch S3L is set at
"ON".
Set the S3Lto "OFF".
3 on page 16.
0
Double needle stitching
does not occur even
when corner stitching
Is completed.
Needle select solenoid
is misaligned.
Align the solenoid.
1 on page 14.
The operation panel Is
trouble.
Replace the operation
panel.
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From the library of: Superior Sewing Machine & Supply LLC