Cebora 965 Service Manual Download Page 1

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CEBORA S.p.A.

PLASMA PROF 55

POWER SOURCE art. 965

SERVICE MANUAL

3.302.173

28/07/04

Summary of Contents for 965

Page 1: ...CEBORA S p A 1 PLASMA PROF 55 POWER SOURCE art 965 SERVICE MANUAL 3 302 173 28 07 04...

Page 2: ...ssing 13 3 3 7 In open circuit operation the output voltage is not regular 14 3 3 8 Irregular pilot arc starts unstable pilot arc 15 3 3 9 Transfer arc does not take place or is too weak for cutting 1...

Page 3: ...les 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...

Page 4: ...42 to detect the cutting current on the earth conductor of the power source and pilot arc resistors 37 used for limiting pilot arc current and to facilitate the transferred arc operation At the rectif...

Page 5: ...new tentative When the pilot arc is lit you have approximately 2 seconds to begin cutting after which timer the pilot arc shuts off until the start button is pressed again When the torch with lit pilo...

Page 6: ...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 Oper...

Page 7: ...PEOPLE OR PARTS OF BODY BUT ALWAYS TOWARDS AN OPEN SPACE OR THE WORKPIECE Briefly press the torch start button Correct Gas flows from the torch for approximately 90 seconds post gas time The pressure...

Page 8: ...trol board 6 Check the insulation towards earth of the transformer 44 and fan 39 If leaking or short circuited towards earth replace Mains not suitable to power the power source ex insufficient instal...

Page 9: ...mately 230 Vac with switch 29 closed both with mains at 230 and at 400 Vac YES NO Check the wiring between terminals J8 and J9 of control board 6 and fan 39 Check the presence of control board supply...

Page 10: ...torch cable torch button and contact of the nozzle guard on the torch Make sure connection between J1 and J2 on HF filter board 47 Make sure the insulation between torch start button cables and elect...

Page 11: ...R SUPPLY TEST par 3 3 1 Replace control board 6 With power source off check the resistance between the terminals of solenoid valve EL1 34 approximately 2500 ohm If Mohm winding broken replace solenoid...

Page 12: ...ponents with damaged terminals Check the condition of the torch cable and torch especially make sure there are no short circuits or insulation leaks between the conductors and that electrode nozzle no...

Page 13: ...e electrode terminal and between rectifier 32 positive terminal resistors 37 HF filter board 47 and torch cable nozzle terminal If you find loose connections tighten and replace any components with da...

Page 14: ...Perform START COMMAND TEST par 3 3 3 Replace control board 6 With power source off check the resistance between terminals of contactor TLP 30 coil Corrected value approximately 430 ohm If Mohm circuit...

Page 15: ...noid valve EL1 34 open and solenoid valve EL2 34 closed during the pilot arc Make sure the power source open circuit working condition performing if necessary tests in par 3 3 7 Check the wiring betwe...

Page 16: ...n EL2 34 and terminals 2 and 8 of J7 on control board 6 With power source off check resistance between terminals of EL2 34 approx 2500 ohm If 0 ohm short circuit replace EL2 34 and control board 6 Rep...

Page 17: ...enly heated make sure that the duty cycle is not greater than indicated in the power source specifications If the alarm occurs while cutting and only some of the windings of the transformer 44 are hea...

Page 18: ...4 Vac contact opened with low pressure 3 2 bar 0 Vac contact closed with suitable pressure YES NO Check the wiring between pressure switch 33 and terminals 3 4 and 5 on control board 6 Check for the p...

Page 19: ...3 List of spare parts Essential spare parts Ref Code Description Qty 6 5602170 control circuit 1 11 3160166 pressure gauge 1 29 3190243 switch 1 32 3200069 rectifier 1 33 5710129 pressure switch 1 34...

Page 20: ...put from thermostats on transformer 44 J4 NU J5 J6 output for HF transformer 31 J7 1 7 230 Vac input for control board 6 power supply J7 2 8 230 Vac output to control solenoid valve EL2 34 J7 3 9 230...

Page 21: ...rawing 5 3 2 Connector table Connector Terminals Function J1 A B start signal input J2 A B start signal output TP3 output voltage input workpiece potential TP4 TP7 rectifier 32 output voltage input TP...

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Page 23: ...ANSFORMER 32 RADDRIZZATORE RECTIFIER 33 PRESSOSTATO PRESSURE SWITCH 34 ELETTROVALVOLA SOLENOID VALVE 35 CONTATTO CONTACT 36 SERRAPACCO PACK HOLDER 37 RESISTENZA RESISTANCE 38 LAMPADA SPIA LIGHT 39 MOT...

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