137
10. AT A TIME LIKE THIS !
In case of the following, check again before you judge the case as trouble.
Phenomenon
Buzzer peeps and the sewing
machine fails to operate when the
machine head is tilted.
Solenoids for thread trimming,
reverse stitching, wiper, etc. fail
to work.
The sewing machine fails to run
even when depressing the pedal
immediately after turning ON the
power. The sewing machine runs
when depressing the pedal again
after depressing the back part of
pedal.
The sewing machine fails to stop
even when the pedal is returned
to its neutral position.
Stop position of the sewing
machine varies. (Irregular)
Presser foot does not lift although
auto-lifter is installed.
Reverse feed stitching switch fails
to work.
The sewing machine fails to run.
Panel switch fails to work.
Cause
The measures described on the left are
taken for safety when tilting the machine
head without turning OFF the power.
In case the fuse has blown.
Neutral position of the pedal is slipped.
(When changing the spring pressure of
pedal, the neutral position may be
slipped.)
In case the screw of handwheel of the
machine is forgotten to be tightened when
adjusting the stop position of needle.
Auto-lifter function is set to OFF.
Pedal type is set to KFL.
Cord of auto-lifter is not connected to
connector.
Presser foot is lifting by means of auto-
lifter.
Auto-lifter function is set to ON although
auto-lifter is not installed.
Motor output cord (4P) is disconnected.
Connector of motor signal cord is
disconnected.
Key lock is locked.
Corrective measure
Tilt the machine head after turning OFF
the power.
Check the fuse.
Execute automatic compensation of
neutral position of pedal sensor.
(Function setting No. 103)
Securely tighten the screw of handwheel.
Select “FL ON” by means of auto-lifter
function setting selection.
(Function setting No. 23)
Change the jumper to PFL setting when
lifting the presser foot by depressing the
back part of pedal.
Correctly connect the cord.
Operate the switch after the presser foot
has come down.
Select “FL OFF” when auto-lifter is not
installed. (Function setting No. 23)
Correctly connect the cord.
Correctly connect the cord.
Change the key lock to the proper level.
P.99
Confir mation
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