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