Language: EnglishMMA UNITS 125-130A Date Creation: Jan. 2005 Rev.: 00 Service Manual 1105 1 GENERAL CLEANING Remove the machine shell and clean carefully with compressed air.2 MACHINE: VISUAL INSPECTION 1. 1.INVERTERS MMA 130A 1. 4 RIF. 3 . Diodes of the secondary circuit: check points 1-K of diodes VD1 and VD2 (fig.3 CHECK OF THE MAIN COMPONENTS WITH TESTER (OHMMETER) ON THE CIRCUIT REF. 4). 1 1. C-E of components 1 and 2. If there are short circuits or faults during these tests. 2) check if there are swellings or breaks on the container 2. 1. IGBT of the primary circuit and diodes of recycle: test points G-C. 2 REF.3 RIF. 3). 1. R14 RV1 VB1 FIG. 1 1. replace the electronic circuit ref. 1 3 C32 2 C33 4 FIG. replace the electronic circuit. 5).0 REPAIR INSTRUCTIONS 1. Check for the presence of short circuits on the rectifier bridge (VD1) and the correct value of the power resistance (R14) (fig. Check the general conditions of the electronic circuit ref. 1105 Pag. Check on all the harnesses the insulation of the cables and the state at the connection points. 1 FIG. points A-K of components 3 and 4 (fig. 1 REF. 1 2. 1 • check for the presence of cracks or breaks on the welds of the following components: • transformer T1 • impedance L2 • the presence of burn tracks or electric discharge marks on the printed circuit In case of faults. particularly: • the varistor (RV1) (fig. G-E. 1 FIG. 1) if it presents bursting marks • the state of the levelling condensers C32 and C33 (fig. 5 REF. Connect a feeder on the zener V13 with GND on the anode and supply with approx.5 V/Div with probe x10 and verify: • the presence between points: E (GND) . 9 REF. Disconnect the feeder. 8 REF. 9). 7 REF.B (probe) (fig.A (probe) and F (GND) . 2 seconds a wave will appear as in fig. 15Vdc. Solution: board replacement ref. A FIG. set the oscilloscope on a time base of 5 uS and a range of 0. 1. 1 FIG. switch it on: P M E FIG.8 RIF. the electronic circuit is broken. set the oscilloscope with a range of 1V/Div and connect the probe X100 between points M and P (fig. and after approx. 1 1. 1 B • the motor fan starts up. 5 . F FIG. 9. 7: if the waveform differs from the one in the figure or it is not present. 6) of the waveform shown in fig.4 CHECK OF GENERATOR OPERATION WITH OSCILLOSCOPE AND VOLTMETER 1.1 1105 Pag. connect the machine to the power supply.INVERTERS MMA 130A VD1 VD2 FIG. 1 2. 7.5% tolerance. 2. U T 2. 1) short-circuit points U. is between 20V and 23V. • If the wave form does not appear or the output voltage is not correct. 8. 3. Disconnect the probe. before proceeding.20V). Connect the generator to the power supply (230 Vac).0 FINAL TEST 1. If the current readings differ. Apply oscilloscope probe as in fig. 12 REF. 6. 1 FIG. the current descends to approx.INVERTERS MMA 130A • check with a voltmeter that the output voltage is approx.5%): switch off the generator. 11 REF. Carry out MMA welding tests at maximum current (one electrode) FIG. switch on the generator. Set the regulation knob to the centre of the dial. 11. T and a rheophore of the primary circuit of the transformer (fig. 1 T 1105 Pag. 1 Carry out the final test after the repair. act as follows: • on the electronic board (ref. 10 RIF. use the trimmer T (fig. 7 . turn the knob to the maximum welding current and read with the amperometer the maximum current indicated on the technical table with +/. After the test remove all the short circuits and switch off. FIG. Carry out the safety test according to our operative instruction N. 10) • switch on • short-circuit the feeder plug • short-circuit the output dinse. 13) to obtain the correct current value. with maximum current. 47Vdc (see test specification point 2). 9. switch off the generator and with the load to the maximum current. let the machine work at the greatest capacity. 5. set the minimum current on the frontal panel and check with the amperometer that there is a value near than the one indicated on the technical table. replace the electronic circuit ref. switch it on and check if the voltage of the outputs is 47 Vdc (+/.. 25A. 1 PRIMARY CIRCUIT OF THE TRASF. Regulate the resistive load to measure the minimum current (5A .5 sec. You will see on the oscilloscope a waveform as in fig. Connect the generator to the resistive load: the load must be regulated so that the voltage on the load. SLL12. Short-circuit the load and verify that after 1. 8 4. SPARE PARTS LIST .PIÈCES DÉTACHÉES . W000050018 W000050019 W000050028 W000050020 W000050021 W000050022 W000050023 W000050026 W000050029 W000050025 W000050024 W000050027 DESCRIZIONE CIRCUITO ELETTRONICO CE 22599 POTENZIOMETRO AGGANCIO CINGHIA CAVO ALIMENTAZIONE PRESSACAVO INTERRUTTORE RACCORDO USCITA MOTOVENTILATORE CINGHIA NYLON MANOPOLA CAPPUCCIO SUPPORTO SCHEDA DESCRIPTION CIRCUIT ÉLECTRONIQUE CE 22599 POTENTIOMÉTRE ANNEAU ACC. 01 05 06 08 09 11 12 14 -56 56 72 01 DESCRIPTION CIRCUIT BOARD CE 22599 POTENTIOMETER STRAP ATTACHMENT POWER CABLE CABLE CLAMP SWITCH OUTLET CONNECTOR ELECTRIC FAN NYLON STRAP KNOB HOOD SUPPORT COD.LISTA PEZZI DI RICAMBIO . ELÉCTRICO CORREA DE NYLON PERILLA CAPUCHÓN SUPORTE 1105 SAXO 1300 .ERSATZTEILLISTE . DE LA SANGLE CÂBLE D'ALIMENTATION SERRE-CABLE INTERRUPTEUR RACCORD SORTIE MOTOVENTILATEUR COURROIE NYLON BOUTON CAPUCHON SUPPORT BESCHREIBUNG STEUERPLATINE CE 22599 POTENTIOMETER RIEMENKUPPLUNG NETZKABEL KABELSCHELLE SCHALTER AUSGANGSANSCHLUSS MOTORLÜFTER NYLONRIEMEN DREHKNOPF KAPPE AUFHANGUNG DESCRIPCIÓN CIRCUITO ELECTRÓNICO CE 22599 POTENCIÓMETRO ENGANCE DE LA CORREA CABLE DE ALIMENTACIÓN PRENSACABLE INTERRUPTOR RACOR DE SALIDA VEN.LISTA DE LAS PIEZAS DE RECAMBIO 06 05 11 09 56 12 08 72 14 SAXO 1300 R. ESQUEMA ELÉCTRICO 1105 TAV.STROMLAUFPLAN . 2 .SCHEMA ELETTRICO .SCHÉMA ÉLECTRIQUE .WIRING DIAGRAM . COD.ELEKTRONIKSCHALTUNG .CIRCUIT ÉLECTRONIQUE .V1 R8 R10 R5 C4 R6 R7 V2 R12 K1 XPE1 2 3 2 3 1 C7 R16 2 3 V8 V9 V10 V6 R17 XP2 2 1 V5 C11 U1 3 RP2 R18 R19 C9 V7 V11 1 C10 C12 VB1 L2 C13 R20 R21 R22 L3 C14 E1+E5 R23 R24 V13 V14 V15 V12 R25 TI1 C18 C16 1 RTH2 C15 R26 C17 XP4 XP3 XTA1 TA1 XTA2 XP7 R39 C19 R27 1 XP9 V16 E2 T1 L4 VM1 1 2 3 R28 V17 3 VM2 1 2 3 V19 V18 2 AIR FLOW R29 1 M1 C25 R34 R41 ISOLANTE PRESSPAN R31 V20 V21 RB2 R32 C22 R33 C24 E3 RTH1 VM3 1 2 3 R35 R36 3 2 1 E7 VM4 1 2 3 V24 V25 V29 V23 E4 VD1 A R38 K A A VD2 K A A VD3 K A R30 XPE2 XP10 + E8 V26 V27 R37 RB1 CIRCUITO ELETTRONICO .CE 22599 .ELECTRONIC CIRCUIT .CIRCUITO ELECTRÓNICO RIF.01 . 800022599 E6 C20 1 L1 6 8 7 V3 2 C6 V4 R13 R14 R15 1105 R1 R2 R3 R4 C5 C3 1 3 5 4 C1 C2 X1 XP1 3 2 1 RP1 VH1 XP8 21min 23max 2 - TAV. 3 A . ELEKTRONIKSCHALTUNG . 3 B . 800022599 1105 TAV.CIRCUITO ELETTRONICO .ELECTRONIC CIRCUIT . 01 .CIRCUIT ÉLECTRONIQUE .COD.CIRCUITO ELECTRÓNICO RIF.CE 22599 . CE 22597 .COD.CIRCUIT ÉLECTRONIQUE . 3 C . 800022597 R11 R4 C1 R5 R6 R7 R8 C2 R9 C3 R10 C4 R12 R13 R14 R15 R16 V5 R1 R2 V1 R3 V2 C5 V3 V4 V6 C7 C8 C10 V8 V7 V9 C6 R18 R19 U1 C9 N1 V10 V11 C11 R20 C12 R21 C13 R22 R23 C14 C16 R24 R25 R26 C18 C19 R27 R28 R29 R30 R31 R32 C15 C17 V12 C20 X1 1 23 25 1105 R17 TAV.CIRCUITO ELETTRONICO .ELEKTRONIKSCHALTUNG .ELECTRONIC CIRCUIT .CIRCUITO ELECTRÓNICO RIF. 1 . CIRCUIT ÉLECTRONIQUE . 1 .CIRCUITO ELECTRÓNICO COLT 1300 . 800022597 1105 .CE 22597 .CIRCUITO ELETTRONICO .COD.ELECTRONIC CIRCUIT .RIF.ELEKTRONIKSCHALTUNG .