Power Voltage Changeover Procedure - JUKI SC-910 Engineer's Manual

(2) Power voltage changeover procedure

WARNING :
To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, carry
out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent accidents
caused by unaccustomed work or electric shock, request the electric expert or engineer of our dealers when
adjusting the electrical components.
It is adaptable to the voltage of single phase 100V to 120V/3-phase 200V to 240V by changing the voltage changeover
connector mounted on FLT p.c.b.
(Caution) When the changing procedure is wring, the control box will be broken. So, be very careful.
WHITE
BLACK
RED
GREEN/
YELLOW
WHITE
BLACK
RED
GREEN/
YELLOW
WHITE
BLACK
RED
GREEN/
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
– 58 –
Changing procedure of the changeover connector
1. Turn OFF the power source with the power switch
after confirming that the sewing machine has
stopped.
2. Draw out the power cord from the power plug
socket after confirming that the power switch is
turned OFF. Then wait for five minutes or more.
3. Remove the front cover.
4. Remove three screws fixing the rear cover of the
control box and slowly open the rear cover.
A. In case of using with 3-phase 200V to 240V
• Changing the changeover connector
Connect to 200V the 100/200V changeover con-
nector of FLT p.c.b. 1 located on the upper side
of the right side face as observed from the rear
cover side.
• Connect the crimp style terminal of AC input cord
to the power plug as shown in the figure.
B. In case of using with single phase 100V to 120V
• Changing the changeover connector
Connect to 100V the 100/200V changeover con-
nector of FLT p.c.b.
of the right side face as observed from the rear
cover side.
• Connect the crimp style terminal of AC input cord
to the power plug as shown in the figure.
(Caution) Securely perform the insulation treat-
ment to the red terminal which is not
used with insulation tape or the like.
(When the insulation is insufficient,
there is a danger of electric shock or
leakage current.)
C. In case of using with single phase 200V to 240V
• Changing the changeover connector
Connect to 200V the 100/200V changeover con-
nector of FLT p.c.b.
of the right side face as observed from the rear
cover side.
• Connect the crimp style terminal of AC input cord
to the power plug as shown in the figure.
(Caution) Securely perform the insulation treat-
ment to the red terminal which is not
used with insulation tape or the like.
(When the insulation is insufficient,
there is a danger of electric shock or
leakage current.)
5. Check that the change has been performed with-
out fail before closing the rear cover.
6. Be careful that the cord is not pinched between
the rear cover and the control box main unit. Close
the rear cover while pressing the lower side of
rear cover, and tighten three screws.
located on the upper side
located on the upper side