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1-13. Replacing the fork
1
2
2
1-14. Replacing the fuse
WARNING:
1. To avoid electrical shock hazards, turn O�� the power and open the control box cover
after about five minutes have passed.
2. Open the control box cover after turning O�� the power without fail. Then, replace with
a new fuse with the specified capacity.
For the fork, the pin section is integral with the
base section. To replace the fork, both the pin
section and the base section have to be replaced
together.
Loosen two setscrews 1 and replace the fork pin
asm. with a new one.
The fork pin is to be mounted with fitted in seat-
ing section 2 in terms of both the longitudinal and
lateral directions as shown in the figure at left. Be
sure to securely tighten setscrews 1 with the fork
pressed against the seating section.
The fork section is always pressed
by the work clamp foot of the sewing
machine. Daily checkup is necessary
to check whether the fork pin is dam-
aged, the fork is bent or the setscrews
have loosened.
Check first that the power switch is in the OFF
state, and disconnect the power cord from the wall
outlet.
1
Then, wait for five minutes or more.
Remove four screws which secure the back cover
2
of control box. Carefully open the back cover.
There are three fuses placed on the upper right
3
section of the SDC PWB.
1 For stepping motor power supply protec-
tion 5A (time-lag fuse)
2 For solenoid power supply protection
3.15A (time-lag fuse)
3 For control power supply protection 2A
(fast-blow type fuse)
– 129 –
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