CEBORA S.p.A.
1
3.302.155
22/01/04
BRAVO MIG
POWER SOURCES
arts. 574 – 575 – 591 – 593
SERVICE MANUAL
Page 1: ...CEBORA S p A 1 3 302 155 22 01 04 BRAVO MIG POWER SOURCES arts 574 575 591 593 SERVICE MANUAL...
Page 2: ...the wire feeder motor does not work 12 3 3 6 In open circuit operation the output voltage is not regular 13 3 3 7 In resistive load operation the output voltage is not regular 15 3 3 8 When start butt...
Page 3: ...d electronic boards or modules replace them with original Cebora spare parts 1 3 Safety information The safety notes provided in this manual are an integral part of those given in the Instruction Manu...
Page 4: ...ns voltage is applied to the power transformer 30 only after the contactor 47 is closed as controlled by the control board 42 based on the operating conditions of the power source The switches 50 or 5...
Page 5: ...s in the power source safety switch 59 on the wire feed unit guard and thermostat 63 on the windings of the power transformer 30 When these are tripped they stop the power source opening the contactor...
Page 6: ...e dry compressed air or a brush Check the condition of the output terminals and power cables of the power source and torch replace if aged or damaged Check the condition of the internal power connecti...
Page 7: ...d On control panel led C lights for as long as the guard stay open NO see 3 4 YES WARNING DURING THE FOLLOWING TESTS DO NOT AIM THE TORCH AT PEOPLE OR PARTS OF THE BODY BUT ONLY TOWARDS AN OPEN SPACE...
Page 8: ...ee 3 3 8 YES q Turn the knob A to the central position spot welding q Move the torch near the workpiece and press the start button Begin welding that lasts only for the time set by knob A Once this ti...
Page 9: ...rentheses If there is no such indication the test and description refer to all power sources 3 3 1 The power source does not start control panel off MAINS SUITABILITY TEST q Missing voltage at the pow...
Page 10: ...resistance of the primary winding Correct values terminals 0 230V approximately 10 ohm arts 574 575 approximately 6 ohm arts 591 593 terminals 0 440V approximately 18 ohm arts 574 575 approximately 11...
Page 11: ...ENOID VALVE 14 TEST q Solenoid valve 14 terminals 27 Vac with torch button pressed and as long as the button is held down NO YES Check the presence of gas at the fitting provided on the rear panel and...
Page 12: ...der motor 5 from the connector J2 control board 42 and check the resistance between the motor terminals left free Correct value approximately 1 ohm resistance of the motor winding If Mohm winding brok...
Page 13: ...the rectifier bridge 24 without any load at its output With a small load ex 100 ohm applied at the power source output the operation of the rectifier 24 may improve and the measurable values may beco...
Page 14: ...2 24 26 5 28 5 32 NO YES Check the wiring between transformer 30 secondary circuit and rectifier 24 Check the efficiency of the rectifier bridge 24 Check the wiring between the negative terminal of re...
Page 15: ...esent are intact If you find loose connections tighten them and replace any components with damaged terminals Check the efficiency of switches 50 and 51 especially make sure there are no signs of burn...
Page 16: ...the workpiece at the end of welding consider the above conditions and carry out the test that follows WIRE FEEDER MOTOR 5 BRAKING TEST q Control board 42 connector J2 terminals 1 and 2 gnd fig 5 2 1...
Page 17: ...ditions comply with the specified values especially observing the duty cycle Make sure that the thermostat mounted on the transformer 30 is properly assembled and functioning correctly its contact mus...
Page 18: ...an 1 3065103 3065103 38 knob 1 3055137 3055137 3055137 3055137 40 knob 1 3055136 3055136 3055136 3055136 42 progr control circuit 1 5602151 5602151 5602151 5602151 47 contactor 1 3190268 3190268 31902...
Page 19: ...IAGRAMS 5 1 Power sources arts 574 575 591 593 see file SCHE5 pdf enclosed at the end of the manual 5 2 Waveforms 5 2 1 Wire feeder motor 5 voltage during correct braking par 3 3 8 5 2 2 Wire feeder m...
Page 20: ...Terminals Function J1 1 2 28 Vac input for control board 42 power supply J1 3 5 solenoid valve 14 command output J1 4 6 contactor 47 command output J1 7 8 input signal from safety circuits thermostat...
