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4. Sensors test 2
1
2
3
1. Upper thread sensor
A square of the upper thread sensor filled when you
performed the following operation:
1. Thread the upper thread normal way until needle
bar thread guide.
2. Lower the presser foot lift.
3. Pull and release upper thread lightly so that the
thread check spring is pulled up and down. At this
time, the square of upper thread sensor should
change to white and black.
2. Bobbin winding sensor
If moving the bobbin winding between it's 2 different
positions on or off, a square should change between
white and black, the function is correct.
3. Thread cut sensor, Cut sequence
When the - and + button of the Stitch width button
are used, it shall be a possible to run the cut
sequence in steps. Step 0 shall be the resting
position. A square of the thread cut sensor is filled at
step 0 and 1.
"-" : One complete sequience are performed.
"+" : One step of sequence is performed.
5. Sensors test 3
Check of the Foot control Sensor located inside the
foot control.
When the foot control is connected to the machine
and is pressed, the progress bar shows the
measured level divided into 1/9 parts.
24
Service Program
6. Sensors test 4
1
2
1. One step buttonhole switch
Show the current status for the one step buttonhole
switch. Buttonhole switch is comprised of 2
switch:BH-FORE, BH-BACK. The box shall be filled
when the switch is activated, and not filled when the
switch is idle. Lower the buttonhole lever, push or
pull.
2. Presser foot lifter sw
If presser foot is raised, the squsare shall be filled.
7. Reset functions 1
Reset the machine settings.
Make all machine settings in sewing mode return to
default.
When reset, return to the default view of the service
menu 2.
If you don't want to reset, press the Navigator arrows
or the Stitch selection buttons. The display goes
back to the default view for the service view 2.
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