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Cautions in disassembling
Disassembling and assembling the machine arm and bed
Disassembling
(Note)
When disassembling the machine arm and bed,
remove the whole set of the circuit board.
For removing procedure of the circit board, see
the item "Disassembling the circuit board" P.16.
1) Tilt the machine head, remove the rubber base, stud and
setscrews, and remove the cover and packing.
2) Remove the screws in the crank rod.
3) Again, directly attach four studs to the machine bed and
place the rubber base.
4) Raise the machine head, loosen four setscrews in the
throat plate and remove the throat plate.
(Note)
At this time, if the screws in the thread trimming
connecting plate are removed, it is necessary
to again adjust the position of the moving knife
when assembling.
5) Remove the starting lever spring.
6) Remove the arm/bed connecting bolts and remove the
machine arm while rocking and lifting it. Finally, remove
the knock pins.
Cautions in assembling
Assembling
1) Hold the machine arm and place it on
the surface of the machine bed so that
the thread trimming connecting plate
and the crank rod are placed in the
predeterminded positions on the
machine bed.
2) After entering the knock pins and
determining the position, enter the
connecting bolts to fix the machine
arm.
3) Hook the starting lever spring.
4) Install the throat plate.
5) Tilt the sewing machine, remopve the
rubber base and studs, enter the base
c o v e r a n d p a c k i n g a n d a g a i n
assemble it. At this time, move the
sensor slit attached to the stepping
motor to the position as shown in the
figure below.
6) Raise the sewing machine and
assemble the circuit board. Refer to
the item of "Circuit board" P.16.
19
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Fig.
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