Cebora PLASMA PROF 123 ACC Service Manual page 11

CEBORA S.p.A.
MAINS CONNECTION TEST.
Mains terminal board (5), terminals U1, V1, W1 = 3 x 230/400/440 Vac according to mains
voltage.
♦ Check power cable and plug and replace if necessary.
♦ Check the mains voltage conditions.
SERVICE TRANSFORMER (53) POWER SUPPLY TEST.
Fuse board (53), connector J5, terminals 1 - 3 = 230 Vac; terminals 1 - 4 = 400 Vac; terminals
1 - 5 = 440 Vac, with switch (49) closed.
SOME PRE-CHARGE BOARD (3) CIRCUITS ARE LIVE EVEN WITH SWITCH (49) OPEN.
UNPLUG THE POWER SOURCE FROM THE MAINS SOCKET IN ORDER TO WORK
♦ Check the wiring between mains terminal board (5) and J5 pre-charge board (3)
and between J6 pre-charge board (3), switch (49), services transformer (53)
voltage changer and connector J5 of fuse board (53).
♦ Check for the correct position of the services voltage changer, located on the
transformer (37) voltage changer terminal board.
♦ Check fuse F2 on pre-charge board (3); replace it if broken and check that there is
no short-circuit in the services transformer (53) or in the related wiring.
♦ Check for broken services transformer (53) primary winding.
♦ Check switch (49); replace if defective.
♦ Replace pre-charge board (3).
SUPPLY BOARD (51) POWER SUPPLY TEST.
Supply board (51), connector J2, terminals 1 and 2 = 18 Vac, with switch (49) closed.
♦ Check the wiring between J2 supply board (51) and J3 fuse board (53).
♦ Check fuse F2 on fuse board (53); replace if broken, making sure that terminals 1
and 2 of J2 on the supply board (51) are not short-circuited.
♦ Check 18 Vac voltage on terminals 0V-18V on fuse board (53); If lacking, check
the wiring between service transformer and fuse board (53) and replace service
transformer (53), if necessary.
3.302.269
Correct?
YES
Correct?
YES
WARNING
WITHOUT ANY DANGEROUS VOLTAGE.
Correct?
YES
NO
NO
NO
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12/04/2012