Bravo Synergic MIG 4540/T Service Manual Download Page 21

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CEBORA S.p.A.

- ELECTRICAL DIAGRAMS

5.1

- Power source art. 597 : see file SCHE597.pdf enclosed at the end of manual.

5.2

- Waveforms.

5.2.1

- Wire feeder motor (403) voltage during correct braking (par. 3.3.11).

5.2.2

- Wire feeder motor (403) voltage during incorrect braking (par. 3.3.11).

3.302.200

29/04/05

Summary of Contents for MIG 4540/T

Page 1: ...CEBORA S p A 1 BRAVO SYNERGIC POWER SOURCE art 597 SERVICE MANUAL 3 302 200 29 04 05...

Page 2: ...operation the output voltage is not regular 16 3 3 9 In synergic mode he welding quality is not satisfactory the wire speed is not suited to the output current 17 3 3 10 Arc difficult to strike the a...

Page 3: ...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 Manual Therefore before working on...

Page 4: ...ctor 51 closes which is controlled by the control board 4 based on the welding conditions set by the operator The service transformer 55 receives the supply voltage through the voltage change terminal...

Page 5: ...downstream of the rectifier bridge 56 serves to level the welding current and its intermediate sockets allow you to maximize welding quality as the material to be welded changes The shunt 23 inserted...

Page 6: ...and torch replace if aged or damaged Check the condition of the internal power connections and connectors on the electronic boards if you find loose connections tighten or replace the connectors 3 2...

Page 7: ...h time the key E is pressed the leds B C and D light in sequence and display H shows the value of the function indicated by the corresponding lit led NO see 3 3 3 YES WARNING DURING THE FOLLOWING TEST...

Page 8: ...5 Correct With voltage led I lit or thickness led L lit selected the value on display H may be changed using the switches 44 and 45 NO see 3 3 3 3 3 7 YES Use the keys E O or N to select a synergic pr...

Page 9: ...ort circuits or isolation leaks between the various conductors and towards earth in connections between the power cable terminal board 50 contactor 51 switches 44 45 service transformer 55 fan 58 and...

Page 10: ...orrect Terminals of fan 58 approximately 230 Vac with mains at either 230 Vac or 400 Vac with start button pressed NO YES Make sure that there are no mechanical impediments blocking the fan Check with...

Page 11: ...ace control board 4 if necessary Make sure the power supply to the service transformer 55 is correct performing if necessary the CONTROL BOARD 4 POWER SUPPLY TEST in par 3 3 1 Replace service transfor...

Page 12: ...o gas flows from the torch SOLENOID VALVE 12 TEST Correct Solenoid valve 12 terminals 28 Vac with torch button pressed and for as long as the button is held down plus the post gas time NO YES Check th...

Page 13: ...e off temporarily disconnect the terminals of the wire feeder motor 403 from the connector J8 control board 4 and check the resistance between the motor terminals left free Correct value approximately...

Page 14: ...e operation of the rectifier 56 may improve and the measurable values may become closer to those given 10 Therefore for measuring we recommend using the latter method and consider not so important the...

Page 15: ...2 3 4 5 6 7 8 19 7 20 1 20 4 20 9 21 3 22 3 22 8 23 8 25 7 26 4 27 1 27 7 28 5 30 2 31 1 33 Correct NO YES Check the wiring between the secondary transformer 5 circuit and rectifier 56 Check the effic...

Page 16: ...itches 44 and 45 and the voltage change terminal board 59 are intact If you find loose connections tighten them and replace any components with damaged terminals Check the efficiency of switches 44 an...

Page 17: ...e the control panel is working properly see par 3 3 3 Replace motor control board 4 3 3 10 Arc difficult to strike the arc goes out immediately after lighting NOTE In the power sources art 957 the Sof...

Page 18: ...tc Thus if the wire sticks to the workpiece at the end of the welding process consider the aforementioned conditions and perform the following test WIRE FEEDER MOTOR 403 BRAKING TEST Correct Control b...

Page 19: ...guard are in good condition and properly mounted With the guard closed the contact of switch 46 must be closed If incorrectly positioned correct the position replace if defective Check on terminals 7...

Page 20: ...motor 1 61 3065118 fan 1 Recommended spare parts Rif Code Description Q t 6 3060278 coil support 1 12 3160181 solenoid valve 1 40 5803982 handle 1 41 3060247 handle support 2 44 3190515 selector swit...

Page 21: ...wer source art 597 see file SCHE597 pdf enclosed at the end of manual 5 2 Waveforms 5 2 1 Wire feeder motor 403 voltage during correct braking par 3 3 11 5 2 2 Wire feeder motor 403 voltage during inc...

Page 22: ...16 Vac input timing board 62 safety circuits and start button on the torch power supply J1 3 4 signal input from flow meter on cooling unit J1 5 cooling liquid flow signal output J1 6 NU J1 7 8 start...

Page 23: ...J4 1 power source output current signal input J4 2 shared input for power source output voltage and current detection circuits J5 NU board programming J6 NU J7 1 2 28 Vac input for control board 4 pow...