Kemppi miniarc 110 Troubleshooting Manual Download Page 18

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Service infos

02 / 2002 Minus pole insulator

Power sources

Minarc 110 & 140

Modification

An insulator 9771963 is added to the minus-pole. See the attached picture.

Reason for midification

Secondary choke may cause a short circuit between plus- and minus-poles. This is prevented
by installing the inslulator 9771963 to the minus-pole.

Production

The modification is valid from serial number 1023532/K onwards.

Power sources with serial number before 1027716/K

The modification can be carried out during service or repair work.

Summary of Contents for miniarc 110

Page 1: ...Troubleshooting guide Ver 1 0 ...

Page 2: ...rings Measuring points Main transformer T001 prim Voltage Main transformer T001 sec Voltage Voltage after secondary rectifier IGBT gate pulse Control card A001 connectors Control card A001 layout IGBT transistor testing Secondary diodes testing Service infos Notes 3 4 4 5 6 7 7 8 8 9 9 10 10 11 11 13 14 15 16 17 17 18 20 21 ...

Page 6: ...Main circuit diagrams Main circuit diagram from serial number 1085088 M onwards OCV approx 85 V Main circuit diagram before serial number 1085088 M OCV approx 105 V 6 ...

Page 7: ...nctional tests measurings 1 2 3 Measuring point 1 Main transformer T001 primary voltage Measuring point 2 Main transformer T001 secondary voltage Measuring point 3 Voltage after the secondary rectifier 7 ...

Page 8: ...Measuring points on the control card A001 Main tranformer T001 primary voltage 10 A Measuring point 1 Main tranformer T001 primary voltage 1 2 3 4 8 ...

Page 9: ...Päämuuntajan T001 ensiöjännite 140 A Measuring point 2 Main transformer T001 secondary voltage Main tranformer T001 secondary voltage 10 A Measuring point 1 Main transformer T001 primary voltage 9 ...

Page 10: ...Main transfomer T001 secondary voltage 140 A Measuring point 3 Voltage after secondary rectifier Voltage after the secondary rectifier 10 A Measuring point 2 Main transformer T001 secondary voltage 10 ...

Page 11: ...Measuring point 4 IGBT gate pulse IGBT gate pulse 10 A Measuring point 3 Voltage after the secondary rectifier Voltage after the secondary rectifier 140 A 11 ...

Page 12: ...IGBT gate pulse 140 A IGBT gate pulse 60 A Measuring point 4 IGBT gate pulse 12 ...

Page 13: ...IGBT gate pulse with open circuit OCV approx 105 V Measuring point 4 IGBT gate pulse IGBT gate pulse with open circuit OCV approx 85 V 13 ...

Page 14: ...ective earth X4 X6 X8 Current adjustment potentiometer R001 X5 X7 MMA TIG selection switch S002 X9 X11 Main transformer T001 auxiliary coil X10 X12 Main transformer T001 PTC RT101 X13 X14 Primary profile PTC RG201 X15 Fan X16 X17 Main transformer T001 secondary X18 Secondary choke L001 X19 X20 Main transformer T001 primary X23 PWM circuit N1 VFB pin 2 X24 5 V 14 ...

Page 15: ...Control card A001 layout X4 The older version control card A001 4292730 The new control card A001 4298870 15 ...

Page 16: ... filter Intermediate circuit charging Rele 9766230 Rectifier unit 9750191 Smoothing capacitors 9755615 IGBTs and opposite diodes IGBT set 4297750 Secondary rectifier unit 4297740 LED 9775757 Varistors 95 V 9753590 175 V 9753588 16 ...

Page 18: ...Reason for midification Secondary choke may cause a short circuit between plus and minus poles This is prevented by installing the inslulator 9771963 to the minus pole Production The modification is valid from serial number 1023532 K onwards Power sources with serial number before 1027716 K The modification can be carried out during service or repair work 18 ...

Page 21: ...Notes 21 ...