Cebora POWER SPOT 5600 Service Manual page 10

CEBORA S.p.A.
SERVICES POWER SUPPLY TEST.
Power board (12), rectifier bridge W1, negative terminal (-) and diode D2 cathode (+) = +25

Vdc, with switch (21) closed and mains voltage 230 Vac.
♦ Check the wiring between CN3 of power board (12) and transformer (31).
♦ With power source powered check the following voltages at the primary circuit of
transformer (31):
CN3, terminals 8 and 10 = 115 Vac;
−
− CN3, terminals 7 and 9 = 115 Vac;
CN3, terminals 7 and 10 = 0 Vac with mains 230 Vac; 115 Vac with mains 115
−
Vac.
If incorrect replace relay RL1 on power board (12) or complete power board (12).
If correct, make sure the following voltages are present on the secondary circuits
of the transformer (31):
− CN3, terminals 1 and 2 = 190 Vac; terminals 4 and 5 = 18 Vac.
If incorrect, with power source off temporarily disconnect CN3 from power board
(12) and check the resistance between the following terminals of CN3:
− CN3, terminals 1 and 2 = approximately 1.7 ohm; terminals 4 and 5 =
approximately 0.7 ohm.
If incorrect replace the power board (12). If correct, replace transformer (31).
CONTROL BOARD (2) POWER SUPPLY TEST.
Control board (2), connector CN2, terminals 14 (–) and 1 (+) = + 5 Vdc, with switch (21)

closed.
♦ Check the wiring between CN2 control board (2) and CN4 power board (12).
♦ With power source off, temporarily disconnect connector CN4 from power board
(12) and turn the power source back on. Make sure that on CN4 of power board
(12), terminals 14(-) and 1(+) = +5 Vdc. If correct, check the wiring between CN2
control board (2) and CN4 power board (12), and replace control board (2) if
necessary. If incorrect replace the power board (12).
♦ Replace the control board (2).
3.302.311
YES Correct?
NO
YES Correct?
NO
10
23/01/2015