typical GT1790A, Instruction Book

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6. Replacing the fuse
A Danger
1. To avoid electrical shock hazards, turn off the power and wait for 5 minutes before
opening the cover.
2. Be sure to turn off the power switch before opening the cover of control box and
replacing the fuse with specified capacity.
1) Turn OFF the power switch after the sewing
machine stops.
2) Unplug the power cord from power outlet after
confirming the power switch turned OFF Then
wait for over 5 minutes.
3) Remove four screws for fixing rear cover of
electric box and then open the rear cover slowly.
4) Carefully grasp the glass part of fuse to be
replaced and then plug out the fuse.
5) Use the fuse with specified capacity.
①
FF1fuse5 A
DC + 60V for protection
Fuse for protecting pulse motor power and AT relay
power
②
F2fuse2 A
DC + 24V for protection
Fuse for protecting the power of solenoid valve power
and sensor, etc.