The Start Button Produces No Effect; No Gas Flows From The Torch - Cebora TRI STAR MIG 1635/M Service Manual

CEBORA S.p.A.
♦ Check the wiring between J1 control board (29) and J1 power board (32).
♦ Check the wiring between J3 and J7 control board (29) and J4 power board (32).
♦ Carry out the CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control (29) and/or power board (32).
♦ Regular operation of the control panel.

3.3.4 - The start button produces no effect.

START COMMAND TEST.
Control board (29), connector J6, terminals 2(+) – 1(-) = 0 Vdc with torch button pressed (+8
Vdc approximately with button released).
♦ Check the wiring between connector J6 control board (29), connector (F) on front
panel and the torch button.
♦ Check torch button. If defective, replace.
♦ See CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control board (29).
♦ Replace the control board (29).

3.3.5 - No gas flows from the torch.

SOLENOID VALVE (7) TEST.
Solenoid valve (7) terminals = 230 Vac, in MIG or TIG, with torch button pressed (the
solenoid valve opening duration also depends on the pre-gas and post-gas parameters set).
♦ Check for gas presence at the power supply fitting (T) on the rear panel, and make
sure that the pressure and flow in the intake line comply with the specified values
(see specifications in the Instruction Manual).
♦ Make sure there are no occlusions in the gas hoses of the power source.
♦ With the power source off, check the resistance on solenoid valve (7) terminals =
2500 ohm. If >Mohm (winding broken), replace the solenoid valve (7).
♦ Replace the solenoid valve (7).
3.302.233
Correct?
YES
Correct?
YES
Correct?
NO
NO
NO
YES
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22/09/2008