CEBORA S.p.A. 6
3.302.140 21/05/03
Correct?
Correct?
Correct?
Correct?
3.2.2 - Power source does not generate output voltage, lamp in the switch (A) (14) lit.
TRANSFORMER (46) SECONDARY VOLTAGE TEST.
q Transformer (46) secondary terminals = voltages 22, 24, 26 or 29 Vac approximately,
depending by selectors (15) positions, with nominal input voltage, and with power source
open circuit.
YES
NO
♦ Check the wiring between supply cable, switch (14), thermostat (47), selectors
(15) and transformer (46) primary winding.
♦ Make sure the efficiency of the switch (14) and selectors (15).
♦ Make sure the efficiency of the thermostat (47); with transformer (46) at ambient
temperature the thermostat contact must be closed.
♦ Replace transformer (46).
RECTIFIER BRIDGE (38) OUTPUT VOLTAGE TEST.
q Rectifier (38) terminals + and - = voltages 18, 20, 22 or 25 Vdc approximately, depending by
selectors (15) positions, with nominal input voltage, and with power source open circuit (in
case of difficulty in voltages measuring, insert a 1 Kohm, 10 Watts resistor in parallel
connection on the terminals).
YES
NO
♦ Check the wiring between transformer (46) secondary winding and rectifier (38).
♦ Make sure the efficiency of the rectifier (38).
♦ Replace transformer (46).
START BUTTON TEST.
q Control board (41), terminals A1 – A3 = 18 - 25 Vdc (according with selectors (15) position)
with start button on the torch pressed.
YES
NO
♦ Check connections of the torch cable conductors with power source internal
elements.
♦ Check connections inside the torch handgrip, and make sure the torch pushbutton
efficiency. If necessary replace the complete torch.
OUTPUT CONTACTOR (50) TEST.
q Output contactor (50) coil terminal = voltage equals to voltage line, with button on torch
pressed.
YES
NO
M12179B, MB120A, WFW12179, 117-092, 83-363 (Mig 110)
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