JUKI LBH-1790 Instruction Manual page 11

(3) Changing the voltage of 100 / 200V
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 wrong, the control box will be broken. So, be very
careful.
A
WHITE
BLACK
RED
GREEN/
YELLOW
B
WHITE
BLACK
RED
GREEN/
YELLOW
C
WHITE
BLACK
RED
GREEN/
YELLOW
Changing procedure of the changeover connector
1. Turn OFF the power source with the power
2. Draw out the power cord from the power plug
3. Remove the front cover.
4. Remove four screws fixing the rear cover of the
A. In case of using with 3-phase 200V to 240V
• Changing the changeover connector
1
• Connect the crimp style terminal of AC input cord
B. In case of using with single phase 100V to 120V
• Changing the changeover connector
(Plug side)
WHITE
BLACK
• Connect the crimp style terminal of AC input cord
RED
GREEN/
(Caution) Securely perform the insulation
YELLOW
C. In case of using with single phase 200V to 240V
(Plug side)
• Changing the changeover connector
WHITE
BLACK
RED
• Connect the crimp style terminal of AC input cord
GREEN/
YELLOW
(Caution) Securely perform the insulation
(Plug side)
5. Check that the change has been performed without
WHITE
BLACK
6. Be careful that the cord is not pinched between
RED
GREEN/
YELLOW
6
switch after confirming that the sewing machine
has stopped.
socket after confirming that the power switch is
turned OFF. Then wait for five minutes or more.
control box and slowly open the rear cover.
Connect to 200V the 100/200V changeover
connector of FLT p.c.b. 1 located on the side
of the Box Side of the control box.
to the power plug as shown in the figure.
Connect to 100V the 100/200V changeover
connector of FLT p.c.b. 1 located on the side
of the Box Side of the control box.
to the power plug as shown in the figure.
treatment 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.)
Connect to 200V the 100/200V changeover
connector of FLT p.c.b. 1 located on the side
of the Box Side of the control box.
to the power plug as shown in the figure.
treatment 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.)
fail before closing the rear cover.
the rear cover and the control box main unit. Close
the rear cover while pressing the lower side of rear
cover, and tighten four screws.