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Lincoln Electric Power MIG 300 Service Manual Download Page 84

OUTPUT RECTIFIER 

REMOVAL AND REPLACEMENT

Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician or
machine operator and will invalidate your factory warranty.  For your safety and to avoid elec-
trical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshoot-
ing assistance before you proceed.  Call 1-800-833-9353 (WELD).

DESCRIPTION

The procedure will aid the technician in the removal and replacement of the output rectifier
assembly.

MATERIALS NEEDED

1/2 in. Open end wrench
1/2 in. Socket wrench and extension
3/8 in. Nutdriver
3/8 in. Open end wrench
Slot head screwdriver
Diagonal cutters
Dow Corning #340 compound

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TROUBLESHOOTING & REPAIR

F-40

F-40

POWER MIG 300

WARNING

Summary of Contents for Power MIG 300

Page 1: ...And most importantly think before you act and be careful For use with machine Code Numbers 10562 10952 10958 11000 11097 11098 For use with machine SVM160 B April 2005 Sales and Service through Subsid...

Page 2: ...INJURY OR DEATH KEEP CHILDREN AWAY PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING Read and understand the following safety highlights For additional safety information it is stro...

Page 3: ...e work or metal to be welded to a good electrical earth ground 3 f Maintain the electrode holder work clamp welding cable and welding machine in good safe operating condition Replace damaged insulatio...

Page 4: ...rea If this is not possible cover them to prevent the welding sparks from starting a fire Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to...

Page 5: ...availlant proximit au soudage l aide d crans appropri s et non inflammables 4 Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de l h...

Page 6: ...n B Accessories Section C Maintenance Section D Theory of Operation Section E Troubleshooting and Repair Section F How to Use Troubleshooting Guide F 2 Troubleshooting Guide F 4 Test Procedures F 14 R...

Page 7: ...ION INSTALLATION Section A Technical Specifications A 2 Safety Precautions A 3 Input Supply Connection Diagram A 4 Gun and Cable Installation A 5 POWER MIG 300 Return to Master TOC Return to Master TO...

Page 8: ...0 Amps is 40 TECHNICAL SPECIFICATIONS POWER MIG 300 INPUT SINGLE PHASE ONLY RATED OUTPUT OUTPUT RECOMMENDED INPUT WIRE AND FUSE SIZES SINGLE PHASE Height Width Depth Weight 31 79 in 18 88 in 38 78 in...

Page 9: ...eplate Also be sure the planned installation will meet the U S National Electrical Code and local code requirements This welder may be operated from a single phase line or from one phase of a two or t...

Page 10: ...sing the instructions in Figure A 2 have a quali fied electrician connect the receptacle or cable to the input power lines and the system ground per the U S National Electrical Code and any applica bl...

Page 11: ...r is fully inserted and tighten knurled screw 3 Connect the gun trigger connector from the gun and cable to the mating receptacle inside the com partment located above the gun connection made in step...

Page 12: ...necting to 100 CO2 cylinder insert regulator adapter between regulator and cylinder valve If adapter is equipped with a plastic washer be sure it is seated for connection to the CO2 cylin der 5 Attach...

Page 13: ...SECTION Operation Section B Definitions of Welding Modes B 2 Product Description B 3 Controls and Settings B 3 B 4 Setting and Configuring B 5 Multi Process Panel Functions B 6 Arc Control B 7 Wire Dr...

Page 14: ...ly live parts or electrode with skin or wet clothing Insulate yourself from work and ground Always wear dry insulating gloves FUMES AND GASES can be dangerous Keep your head out of fumes Use ventilati...

Page 15: ...arc lengths Once the user has adjusted the Trim for one WFS the power supply will synergically change many variables so that as the WFS is changed the arc length and arc appearance will remain the sam...

Page 16: ...ater in this section 2 VOLT TRIM METER This meter displays either the voltage or trim value depending on the status of the machine Located below the display is the text Volts and Trim An LED light is...

Page 17: ...panel In the example shown in Figure B 2 3 is displayed above the SET switch This means that the machine is set for CC GTAW TIG welding Toggle the SELECT switch to activate the weld parame ters for th...

Page 18: ...econd increments Postflow can be adjusted from 0 to 10 0 seconds in 0 1 second increments Run In The Run In function offers the ability to set a wire feed speed from trigger until an arc is establishe...

Page 19: ...oxygen or a three part shielding gas blend comprised of 90 Helium 7 5 Argon 2 5 carbon dioxide are usu ally employed The added energy is associated in this sce nario with increasing the inductance neg...

Page 20: ...and from there to 10 0 seconds in incre ments of 0 1 seconds The Crater function offers the ability to set an endpoint for WFS and Voltage that will be reached over a specified time period At the end...

Page 21: ...ines up with the brake holding pin to assist in lining up a hole Be certain the wire comes off the reel in a direction so as to de reel from the top of the coil CAUTION PROCEDURE FOR CHANGING DRIVE AN...

Page 22: ...knob is set at the factory at the 2 hash mark This is an approximate setting The optimum idle roll pressure varies with type of wire wire diameter surface conditions lubri cation and hardness As a gen...

Page 23: ...FIGURE B 5 PEAK AMPS FREQUENCY SPRAY TRANSITION CURRENT EACH PULSE DELIVERS ONE DROPLET OF WELD MATERIAL Pulsed MIG is an advanced form of welding that takes the best of all the other forms of transfe...

Page 24: ...g the Arc Control decreases the droplet transfer and weld deposition rate Increasing the Arc Control increases the droplet trans fer and weld deposition rate Since Arc Control varies weld droplet tran...

Page 25: ...ing the wire feed speed based upon mate rial thickness and appropriate travel speed Then adjust the Volts Trim knob as follows For steel listen for the traditional frying egg sound of a good short arc...

Page 26: ...14 NOTES POWER MIG 300 B 14 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC...

Page 27: ...00 C 1 C 1 TABLE OF CONTENTS ACCESSORIES Accessories Section C Drive Roll Kits C 2 Push Pull Feeding Connection Adapter Kit C 3 Return to Master TOC Return to Master TOC Return to Master TOC Return to...

Page 28: ...position the POWER MIG pro vides gun trigger switch transfer between the Magnum gun or the spool gun for the same polarity welding with different wire and gas processes Closing either gun trigger wil...

Page 29: ...do not change the WFS at the spool gun To decrease the arc length decrease the SPD value at the POWER MIG 300 to a value lower than the actual WFS Remember The dialed in SPD value at the POWER MIG 300...

Page 30: ...C 4 C 4 NOTES POWER MIG 300 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC...

Page 31: ...D 1 TABLE OF CONTENTS MAINTENANCE Maintenance Section D Safety Precautions General Maintenance D 2 Liner Removal and Replacement D 3 Return to Master TOC Return to Master TOC Return to Master TOC Ret...

Page 32: ...e worn contact tips as required b Remove spatter from inside of gas nozzle and from tip after each 10 minutes of arc time or as required GUN CABLE CLEANING To help prevent feeding problems clean cable...

Page 33: ...ths prevents the interchangeability of liners between guns Once a liner has been cut for a particular gun it should not be installed in another gun unless it can meet the liner cutoff length requireme...

Page 34: ...IG 300 BLOCK LOGIC DIAGRAM IGBT LINE SWITCH RECONNECT PANEL MAIN TRANSFORMER RELAY SPOOL GUN BOARD FEEDER BOARD MSP BOARD ENCODER BOARD DISPLAY BOARD RS232 CONNECTOR WELD CONTROL BOARD SPOOL GUN PUSH...

Page 35: ...l gun or a push pull gun for feeding aluminum wires THEORY OF OPERATION E 2 E 2 POWER MIG 300 FIGURE E 2 INPUT VOLTAGE AND MAIN TRANSFORMER NOTE Unshaded areas of Block Logic Diagram are the subject o...

Page 36: ...relay which also receives signals from the Weld Control Board The fan is designed to come on automatically when the trigger is pulled The fan will stay on as needed for a minimum of six minutes after...

Page 37: ...the IGBT is turned off See Chopper Technology Fundamentals in this sec tion Output voltage and current feedback information is fed to the Weld Control Board This information is sensed from the curren...

Page 38: ...GURE E 5 WELD CONTROL BOARD IGBT LINE SWITCH RECONNECT PANEL MAIN TRANSFORMER RELAY SPOOL GUN BOARD FEEDER BOARD MSP BOARD ENCODER BOARD DISPLAY BOARD RS232 CONNECTOR WELD CONTROL BOARD SPOOL GUN PUSH...

Page 39: ...ut THEORY OF OPERATION E 6 E 6 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master T...

Page 40: ...ic Diagram are the subject of discussion FIGURE E 7 WIRE DRIVE MOTOR AND FEEDBACK IGBT LINE SWITCH RECONNECT PANEL MAIN TRANSFORMER RELAY SPOOL GUN BOARD FEEDER BOARD MSP BOARD ENCODER BOARD DISPLAY B...

Page 41: ...er must be removed from the machine and the fan condition or air obstruction corrected The cooling fan runs only when necessary The F A N fan as needed system is controlled by the Weld Control Board v...

Page 42: ...ws an IGBT in a passive mode There is no gate signal zero volts relative to the source and therefore no current flow The drain terminal of the IGBT may be connected to a voltage supply but since there...

Page 43: ...ve portion is the other IGBT group The dwell time off time is 48 microseconds both IGBT groups off Since only 2 microseconds of the 50 microsecond time period is devoted to conducting the output power...

Page 44: ...UCTOR CURRENT WITH SWITCH OPEN ARC CURRENT WITH SWITCH CLOSED In this system the engine drives a three phase alternator which generates power that is rectified and filtered to produce about 80VDC The...

Page 45: ...r Assembly Test F 21 Wire Drive Motor and Tachometer Feedback Test F 23 Encoder PC Board Test 10562 Above F 26 Current Transducer Test F 29 Power Mig Scrolling Dashes Test F 32 Oscilloscope Waveforms...

Page 46: ...MISADJUSTMENT S lists the obvious external possibilities that may contribute to the machine symptom Perform these tests checks in the order listed In general these tests can be con ducted without rem...

Page 47: ...uipment Do not touch electrically hot parts Remove the PC board from the static shielding bag and place it directly into the equipment Don t set the PC board on or near paper plastic or cloth which co...

Page 48: ...Check the input voltage at the machine Input voltage must match the rating plate and the reconnect panel 3 Blown or missing fuses in the input line 4 Check for thermal light on case front Thermostats...

Page 49: ...he gun may be faulty Check for continuity 3 Check continuity through the work lead 1 Check for loose or broken con nections at the output terminals the choke and all heavy current carrying leads See t...

Page 50: ...lty connections 1 Check for loose or faulty con nections of the heavy current carrying leads See Wiring Diagram 2 Perform the Current Transducer Test 3 Perform Output Waveform Test 4 Perform the Outpu...

Page 51: ...ved 1 The arc voltage encoder may be faulty Codes 10562 have both Encoders on one board Codes above 10562 have single Encoders 2 If machine has code 10562 or lower change Encoder Board If machine has...

Page 52: ...Normal open cir cuit voltage is present 1 Check for wire jam at drive rolls 2 If the drive rolls are turning then check for a mechanical restric tion in the wire feed path 3 The gun liner may be clog...

Page 53: ...waveforms are not correct Perform the Output Rectifier Assembly Tests 2 Reload latest software Contact a Lincoln Electric sales repre sentative for latest software 3 The Control board may be faulty R...

Page 54: ...eck the Output Voltage Waveforms The welding arc is variable and sluggish 1 Check the welding cable connec tions for loose or faulty connec tions 2 Make sure the wire feed speed voltage and shielding...

Page 55: ...a sig nal level right at the trip threshold Turn machine off and let sit for 60 second and then turn back on Run Scrolling dash Test If still bad replace Control PCB 81 Motor overload average motor c...

Page 56: ...t repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This procedure will insure that the...

Page 57: ...ight case cover 4 Locate the Chopper Board with capacitors mount ed on the center of the machine base right side See Figure F 1 5 Using the resistor and jumper leads CAREFULLY discharge the capacitor...

Page 58: ...unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1 800 833 9353 WELD TEST DESCRIPTION This...

Page 59: ...anel and the ON OFF POWER SWITCH Also test the ON OFF POWER SWITCH for proper operation If the voltage is correct check for the same voltage at H1 and H4 and at the bottom of the LINE SWITCH with the...

Page 60: ...lectric Service Department for electrical trou bleshooting assistance before you proceed Call 1 800 833 9353 WELD TEST DESCRIPTION This test will help determine if the power module IGBT on the Chopper...

Page 61: ...test a Carefully insert the meter probes into the back of each Molex plug cavity If 20 VDC is not present check Digital Power Supply See the Wiring Diagram RESISTANCE TEST 1 Perform the Capacitor Disc...

Page 62: ...turn to Master TOC Return to Master TOC Return to Master TOC CHOPPER BOARD TEST continued FIGURE F 4 L11088 1 J6 PWM SIGNAL TEST 1 Locate 607 7J6 and 615 15J6 on the control board See Figure F 4 2 Per...

Page 63: ...o perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will dete...

Page 64: ...X6 X5 X4 X3 30 VAC 115 VAC FAN LOCATED ON TRANSFORMER BAFFLE 42VDC TEST PROCEDURE 1 Find the following leads at the control rectifier using figures F 5 and F 6 2 Carefully connect the meter probes to...

Page 65: ...Service Department for electrical trou bleshooting assistance before you proceed Call 1 800 833 9353 WELD TEST DESCRIPTION This test will determine if the Output Rectifier is shorted See the Oscillos...

Page 66: ...3 Locate and disconnect the negative lead from the output rectifier bridge assembly NOTE Do not disassemble the rectifier assembly 4 Test for shorted or leaky diodes by checking from the outside plat...

Page 67: ...ason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you pr...

Page 68: ...o the machine 7 Make the following voltage tests From the table below 8 Carefully insert the meter probes into the back of each Molex plug pin cavity to perform the test 9 Turn the machine ON and pull...

Page 69: ...Feeder Head Board may be bad Check connections back to Feed Head Board 6 Locate the leads on Plug J84 noted in the table below 7 Carefully insert the meter probes into the back of each Molex plug pin...

Page 70: ...do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance before you proceed Cal...

Page 71: ...PROCEDURE 1 Disconnect the main AC input power to the machine 2 Locate the following leads on Plug J85 and J86 located on the feedhead P C Board See Figure F 9 3 Connect main input power to the machi...

Page 72: ...Board may be faulty replace Feeder Board As you turn the encoder 1 or 2 slowly you should see your meter go from 0 to 15 0 to 15 as you turn the encoder If not check the lead connections If the lead c...

Page 73: ...ou do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance before you proceed...

Page 74: ...From the table below Also see Table F 2 7 Carefully insert the meter probes into the back of each Molex plug pin cavity 8 If excepted voltages are not present the Control Board may be faulty 9 Check t...

Page 75: ...eturn to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC CURRENT TRANSDUCER TEST continued TABLE F 2 CURRENT TRANSDUCER FEEDBACK VOLTAGE OUTPUT LOAD CUR...

Page 76: ...for any reason you do not understand the test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance bef...

Page 77: ...hines with code 10952 10958 and 11000 1 Hold select switch up while powering up machine 2 Release select switch when displays show PrESSPin 3 Turn the right encoder knob until displays show CLrAll 4 T...

Page 78: ...AND BELOW Power Mig 300 in mode 201 Mode 201 is a con stant current test mode 1 Toggle and hold the Mode Select switch in the up position 2 Turn on the Power Mig 300 3 Rotate the right output knob whi...

Page 79: ...ontal Sweep 5 ms Div Coupling DC Trigger Internal TYPICAL OUTPUT VOLTAGE WAVEFORM MACHINE LOADED MACHINE LOADED TO 250 AMPS AT 26 VDC This is a typical DC output voltage waveform generated from a prop...

Page 80: ...are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical trou bleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This te...

Page 81: ...he round head screw lock washer and flat washer securing the lower molded drive roll shaft assembly to the wire drive assembly Remove the molded drive roll shaft assembly from the wire drive assembly...

Page 82: ...continued FIGURE F 11 FOR CODES BELOW 10952 13 7 11 6 10 12 9 8 15 4 14 5 REPLACEMENT PROCEDURE 1 Bolt the wire drive assembly to the wire drive compartment 2 Secure the wire drive compartment to the...

Page 83: ...Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC MOTOR GEAR BOX ASSEMBLY REMOVAL AND REPLACEMENT c...

Page 84: ...erform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The procedure will aid...

Page 85: ...or reassembly note placement of the fasteners bolt flat washer heavy lead small lead terminal flat washer lock washer nut 6 Using a slot head screwdriver and a 3 8 in wrench remove Resistor R1 from th...

Page 86: ...EMENT PROCEDURE NOTE When installing the output rectifier assembly apply a thin coating of Dow Corning 340 com pound to the electrical connections 1 Fit the new output rectifier into its bracket 2 Ins...

Page 87: ...Service Department for electrical troubleshoot ing assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in the removal and replacement of...

Page 88: ...tat leads 503 and 503A 5 Unplug J99 from the chopper board 6 Disconnect lead 607 from terminal B8 and lead 613 from terminal B7 at their in line connectors 7 Using a 7 16 in wrench remove heavy lead B...

Page 89: ...Y REMOVAL AND REPLACEMENT continued REPLACEMENT PROCEDURE 1 Attach the chopper assembly brackets to the new chopper assembly 2 Install the chopper board assembly Fasten it to the machine base with 4 l...

Page 90: ...warranty For your safety and to avoid elec trical shock please observe all safety notes and precautions detailed throughout this manual If for any reason you do not understand the test procedures or a...

Page 91: ...as follows a Using a phillips head screwdriver remove the 2 screws holding the line switch to the case front b Using a 5 16 in nutdriver remove 10 screws hold ing the case front to the to the machine...

Page 92: ...reassembly MAIN TRANSFORMER AND CHOKE ASSEMBLY REMOVAL 16 Using a 1 2 in socket wrench remove 4 nuts and lock washers that hold the main transformer to the machine base Also remove the 4 in bolts fro...

Page 93: ...C Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC MAIN TRANSFORMER AND OUTPUT CHOKE REMOVAL AND REPLACEMENT continued FI...

Page 94: ...e operator and will invalidate your factory warranty For your safety and to avoid elec trical shock please observe all safety notes and precautions detailed throughout this manual If for any reason yo...

Page 95: ...the white lead at the fan relay See Figure F 16 5 Remove the fan blade Note the position of the fan on the shaft for reassembly a Using a slot head screwdriver loosen the fan blade clamp b Slide the f...

Page 96: ...are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshoot ing assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This t...

Page 97: ...ng to within 1 volt 8 The Power Mig 300 ammeter must match the test meter within 5 amps 9 If the volt meter does not meet the specifica tion then proceed to the Voltage Calibration Procedure 10 If the...

Page 98: ...d test ammeter to the welding output terminals 2 Toggle and hold the mode select button in the up position 3 Turn on the Power Mig 300 4 Rotate the output control knob until the dis play reads cur cAL...

Page 99: ...within 1 volt 8 The Power Mig 300 ammeter must match the test meter within 5 amps 9 If the volt meter does not meet the specifica tion then proceed to the Voltage Calibration Procedure 10 If the ammet...

Page 100: ...output terminals 2 Toggle and hold the mode select button in the up position 3 Turn on the Power Mig 300 4 Once the display reads Pres Spin release the mode select switch Rotate the output knob until...

Page 101: ...EST MODE 5 INPUT IDLE WATTS AND AMPS Input Volts Hertz Maximum Idle Watts Maximum Idle Amps 230 60 400 4 25 OPEN CIRCUIT VOLTAGE 45 49 VDC WIRE SPEED RANGE 50 700 IPM 1 27 17 8 m minute OUTPUT AMPS VO...

Page 102: ...2 11098 M20046 1L2 G 13 CHOPPER PC BOARD ASSEMBLY CODE 10562 11098 L11497 1 MSP3 PC BOARD SCHEMATIC CODE 10562 11098 L11612 G 14 MSP3 PC BOARD ASSEMBLY CODE 10562 11098 M19790 1 G 15 FEEDER PC BOARD S...

Page 103: ...6 STUD STUD 502 503A FAN RELAY FAN L1 CHOKE RECONNECT PANEL LINE SWITCH H1 H2 H5 H3 H4 115V X3 X4 X1 X2 H1 H4 L2 L1 H1 W B G L1 L2 H5 H2 H3 H4 1 2 3 4 5 6 J88 ENCODER BOARD MSP III BOARD DISPLAY BOARD...

Page 104: ...H1 H4 L2 L1 H1 W B G L1 L2 H5 H2 H3 H4 1 2 3 4 5 6 J88 MSP III BOARD DISPLAY BOARD 611 503 E F A B C D R2 CONTROL RECTIFIER TP6 903B 901B TP5 TP4 R1 50 watts 500 ohms J32 1 2 3 4 5 6 7 8 9 10 1 2 3 4...

Page 105: ...L2 L1 H1 W B G L1 L2 H5 H2 H3 H4 1 2 3 4 5 6 J88 MSP III BOARD DISPLAY BOARD 611 503 E F A B C D R2 CONTROL RECTIFIER TP6 903B 901B TP5 TP4 R1 50 watts 500 ohms J32 1 2 3 4 5 6 7 8 9 10 1 2 3 4 3244 3...

Page 106: ...472B L3 B W L2 L7 L6 1104 1103 503 503A B6 B2 B5 B1 B5 1 2 3 4 5 6 7 20 253 254 251 254 253 251 SHIELDED CABLE S3 RS232 CONNECTOR SHIELDED CABLE P C BOARD CONNECTION DETAIL J37 FLEX CONTROL BOARD FLE...

Page 107: ...NTHE PUSH PULL POSITION 1 2 3 4 R U B R U B LOCATEDON CASEFRONT TACH MOTOR GEARBOX 2 6VDC 50 IN MIN 27 4VDC 700 IN MIN 8 SECONDAVERAGE CURRENT LIMIT 3 5A LIMIT IS SOFTWARE SET MEASURE B TOU 120Hz 50IN...

Page 108: ...OCATEDON CASEFRONT TACH MOTOR GEARBOX 2 6VDC 50 IN MIN 27 4VDC 700 IN MIN 8SECONDAVERAGE CURRENT LIMIT 3 5A LIMIT IS SOFTWARE SET MEASURE B TOU 120Hz 50IN MIN 1 6kHz 700IN MIN LOCATEDON CASE BACK PWMC...

Page 109: ...OC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 8 POWER MIG 300 SCHEMATIC DIGITAL CONTROL PC BOARD 1 CODE 10562 11098 G 8 NOTE This diagram...

Page 110: ...OC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 9 POWER MIG 300 SCHEMATIC DIGITAL CONTROL PC BOARD 2 CODE 10562 11098 G 9 NOTE This diagram...

Page 111: ...C Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 10 POWER MIG 300 SCHEMATIC DIGITAL CONTROL PC BOARD 3 CODE 10562 11098 G 10 NOTE This diagra...

Page 112: ...11098 G 11 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Return to Section TOC Return to Section TOC Return to Section TOC Return to Section T...

Page 113: ...3 47 5 R58 T1 1 2 11 12 10 0 R60 t 60V 13 R50 10 0 R9 47 5 R6 47 5 R7 10 0 R61 5Volts 750 Amp 100 16V C41 332 R53 50V 0 1 C39 6A 200V D18 33 2 R16 LED2 5V Vref 1 Machine Control Power Supply 47 5 R57...

Page 114: ...G 13 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Retu...

Page 115: ...G 14 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Retu...

Page 116: ...L11166 1 FLEX CIRCUIT 3 01 OZ E3539 ELECTRICAL INSULATING COMPOUND C1 C2 C3 C4 C5 C6 C7 C8 C10 15 S16668 11 CAPACITOR CEMO 0 1 50V 10 C11 C12 C13 C14 C15 C16 C9 1 S13490 104 CAPACITOR TAEL 39 20V 10 D...

Page 117: ...Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 16 POWER MIG 300 SCHEMATIC FEEDER PC BOARD BOARD CODE 10562 11098 SHEET 1 G 16 NOTE This diagr...

Page 118: ...Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 17 POWER MIG 300 SCHEMATIC FEEDER PC BOARD BOARD CODE 10562 11098 SHEET 2 G 17 NOTE This diagr...

Page 119: ...C Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 18 POWER MIG 300 SCHEMATIC SPOOL GUN PC BOARD CODE 10562 11098 SHEET 1 G 18 NOTE This diagra...

Page 120: ...C Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G 19 POWER MIG 300 SCHEMATIC SPOOL GUN PC BOARD CODE 10562 11098 SHEET 2 G 19 NOTE This diagra...

Page 121: ...G 20 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Ret...

Page 122: ...3 1 S24951 4 CPLD SOFTWARE A1 A2 2 M17789 2 ENCODER ROTARY OPTICAL 61JY2049 C1 1 S25024 7SMT CAPACITOR SMD TANTALUM 47MF 20V 10 S7343 C2 C3 C4 C5 C6 C7 C8 7 S25020 3SMT CAPACITOR SMD CERAMIC 0 1MF 50...

Page 123: ...8 G 22 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Re...

Page 124: ...Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician Improper PC board repairs c...

Page 125: ..._ ___________________________________________________________________________ ___________________________________________________________________________ ______________________________________________...

Page 126: ...POWER MIG 300 SVM160 B...

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