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1-9. Replacing the fuse
WARNING :
1. To avoid electrical shock hazards, turn OFF the power and open the control box cover after about
five minutes have passed.
2. Open the control box cover after turning OFF the power without fail. Then, replace with a new fuse
with the specified capacity.
The machine uses the following three fuses :
❶
For pulse motor power supply protection
5A (time-lag fuse)
❷
For solenoid and pulse motor power supply
protection
3.15A (time-lag fuse)
❸
For control power supply protection
2A (fast-blow type fuse)
❶
❷
❸
After the adjustment, be sure to check the oil quan-
tity by operating the sewing machine using the hook
oil quantity check pattern No. 102 (2,500 sti/min)
four times.
1) Remove oil shield
❹
2) Detach the needle.
3) Place a sheet of paper or the like between
thread breakage detection plate
❺
and thread
take-up spring
❷
for insulation.
4) Remove oil and dust from oil shield
❹
. Put a
piece of paper
❸
(100 mm × 15 mm) in front of
oil shield
❹
.
5) Attach oil shield
❹
on the sewing machine.
Operate the machine four times using pattern
No. 102 (2,500 sti/min).
6) After the operation, observe traces of oil on
paper
❸
to check the oil quantity.
The oil quantity does not change im-
mediately after the adjustment.
Be sure to check the oil quantity af-
ter operating the sewing machine for
approximately 10 minutes.
[ Sample of appropriate oil quantity in the hook ]
❹
❸
❺
❷
Paper or
the like
Traces of oil
❸
15mm
100mm