Service manual

CEBORA S.p.A. 10

SIGNALING TEST.

Correct?

 Upon start-up, after the lamp-test, pressing button (A) several times the “Process” and

“Mode” selection is repeated in sequence, indicated by leds F, E, D, C and B that lit in

sequence.

YES

♦ Check the wiring between the CN2 power board (29) and CN2 panel board (26).

♦ Replace panel (26) and/or power (29) boards.

POTENTIOMETER ADJUSTING TEST.

 Power board (29), connector CN2, terminals 10(+) and 2(-) = 0 – +5 Vdc, turning the

potentiometer H (current) on panel board (26).

 Power board (29), connector CN2, terminals 11(+) and 2(-) = 0 – +5 Vdc, turning the

potentiometer M (slope) on panel board (26).

Correct?

 Power board (29), connector CN2, terminals 12(+) and 2(-) = 0 – +5 Vdc, turning the

potentiometer L (post-gas) on panel board (26).

YES

♦ Check the wiring between the CN2 power board (29) and CN2 panel board (26).

♦ Make sure voltage +5 Vdc on terminals 1(+) and 2(-) of CN2 on panel board (26)

(potentiometer power supply). If missing, make sure the same voltage on

terminals 1(+) and 2(-) of CN2 on power board (29), check the wiring between the

two connectors or replace power board (29).

♦ Replace panel (26) and/or power (29) boards.

EXTERNAL CURRENT SETTING TEST (torch potentiometer or push button).

 Power board (29), connector CN1, terminals 2(+) and 3(-) = 0 – +5 Vdc, turning the

potentiometer on the torch.

 Power board (29), connector CN1, terminals 6(+) and 8(-) = 0 Vdc (UP command), with UP

button pressed (+5 Vdc with button released).

Correct?

 Power board (29), connector CN1, terminals 5(+) and 8(-) = 0 Vdc (DOWN command), with

DOWN button pressed (+5 Vdc with button released).

YES

♦ Check the wiring between CN1 power board (29) and CN1 panel board (26).

♦ Make sure the torch connector in correctly inserted in connector (I).

♦ Check potentiometer on the torch. If defective, replace.

♦ Check UP/DOWN buttons. If defective, replace.

♦ Replace panel (26) and/or power (29) boards.

♦ Regular operation. If that in spite some function during the welding it is not corrected replace

power board (29).

3.302.212 12/01/06