Cebora SOUND MIG 2035/M Pulse Service Manual page 21

CEBORA S.p.A.
♦ Replace the wire feeder motor on the torch, or the entire torch.
♦ Replace the wire feeder motor (401).
MOTOR SPEED REFERENCE SIGNAL TEST WITH PUSH-PULL TORCH.
Control board (27), connector J12 terminal 4(+) (or C76 right side) and connector J14(-) =
approximately 0 Vdc, with UP button on torch pressed; approximately +2.5 Vdc, with DOWN
button on torch pressed; +4 Vdc with UP and DOWN buttons released.
♦ Check the wiring between connectors J12 on control board (27) and J1 on panel
board (41), and make sure the push-pull board (43) is properly mounted on panel
board (41).
♦ Check the wiring between connector J1 push-pull board (43) and UP/DOWN
buttons on the torch.
♦ Make sure that the buttons on the torch are working properly, and replace if
defective, or replace the entire torch.
♦ Replace the control (27) and/or panel (41) and/or push-pull (43) boards.
♦ Make sure the unit is set for push-pull torch, by carrying out the TORCH TYPE
RECOGNITION TEST, par. 3.3.4.
♦ Make sure the wire feeder motor command is present by carrying out the START
COMMAND TEST WITH PUSH-PULL TORCH, par. 3.3.4.
♦ Check the wiring between connector J12 on control board (27) and connector J1 on panel
board (41), and make sure the push-pull board (43) is properly mounted on panel board (41).
♦ With the power source off, temporarily disconnect the terminals of the wire feeder motor
(401) from the connector J13 control board (27), and make sure that the resistance between
the terminals of the motor left free = approximately 1 ohm (motor winding resistance). If 0
ohm (short-circuit), replace the wire feeder motor (401) and control board (27).
♦ With the power source off, temporarily disconnect the torch from the power source and check
the resistance between terminals 1 and 8 of the patch connector on the torch. Correct value =
approximately 4 / 40 ohm (motor winding resistance, depends on the rotor stopping point). If
0 ohm (short-circuit), check the wiring between connector and torch motor, and replace torch
motor, or the entire torch, and push-pull board (43) if necessary.
♦ See CONTROL BOARD (27) POWER SUPPLY TEST and CONTROL PANEL POWER
SUPPLY TEST, par. 3.3.1.
♦ Replace the control (27) and/or panel (41) and/or push-pull (43) boards.
3.302.161
Correct?
YES
NO
21
24/03/2004