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Lincoln Electric INVERTEC V300-I, Service Manual

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INVERTEC V300-I

Theory of Operation Section ...........................................................................Section E

Power Supply Operation ......................................................................................E-1
Field Effect Transistor (FET) Operation ...............................................................E-5
Pulse Width Modulation .......................................................................................E-6
Protective Circuits ................................................................................................E-7

Section E

TABLE OF CONTENTS

- THEORY OF OPERATION SECTION - 

Summary of Contents for INVERTEC V300-I

Page 1: ...built with safety in mind However your overall safety can be increased by proper installation and thought ful operation on your part DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING TH...

Page 2: ...g head nozzle or semiautomatic welding gun are also electrically hot 1 d Always be sure the work cable makes a good electrical connection with the metal being welded The connection should be as close...

Page 3: ...g a fire Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas Avoid welding near hydraulic lines Have a fire extinguisher readi...

Page 4: ..._____________________________ 7 c Do not add the fuel near an open flame welding arc or when the engine is running Stop the engine and allow it to cool before refueling to prevent spilled fuel from va...

Page 5: ...es de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de l huile tels que les gants en cuir chemise paisse pantalons sans revers et chaussures mont...

Page 6: ...cedure D 1 Preventive maintenance D 2 Theory of Operation Section E Power Supply Operation E 1 Field Effect Transistor FET Operation E 5 Pulse Width Modulation E 6 Protective Circuits E 7 Troubleshoot...

Page 7: ...Ground Connections A 3 Input Power Cord Connection A 3 Input Power Connection A 3 Input Fuse and Supply Wires A 3 Input Voltage Reconnect Procedure A 3 Output Connections A 4 Work and Electrode Cable...

Page 8: ...0133 Volts at Rated Duty Cycle Amps Amperes 60 Duty Cycle 200 28 100 Duty Cycle 165 26 5 Welding Constant Open Auxiliary Current Range Circuit Voltage Power 5 200 Amps 60 70 VDC 42 VAC 5 5 Amps 24 VAC...

Page 9: ...unding terminal located on the bottom of the input connection box to a good electrical earth ground TILTING Place machine directly on a secure level surface or on a recommended undercarriage The machi...

Page 10: ...able sizes Fuse input circuit with recommended super lag fuses or delay type circuit breakers Install proper fuse in fuse holder in reconnect panel See Specifications at beginning of this chapter INPU...

Page 11: ...ug included with the machine is designed to accept a welding cable size of 1 0 to 2 0 1 Remove 1 in 25mm of welding cable insulation 2 Slide rubber boot onto cable end Boot end may be trimmed to match...

Page 12: ...ational Features and Controls B 2 Welding Capability B 2 Limitations B 2 Controls and Settings B 2 Welding Operation B 4 Auxillary Power B 5 Overload Protection B 5 Section B TABLE OF CONTENTS OPERATI...

Page 13: ...und Always wear dry insulating gloves FUMES AND GASES can be dangerous Keep your head out of fumes Use ventilation or exhaust to remove fumes from breathing zone WELDING SPARKS can cause fire or explo...

Page 14: ...or constant current outputs The V300 I is designed for 50 60 Hz supply systems The welding response of the Invertec has been optimized for GMAW SMAW TIG and FCAW processes It is designed to be used w...

Page 15: ...tests with resistive loads should be done in this mode with Arc Force Control set to minimum CV FCAW This setting has been optimized for Innershield and Outershield flux cored elec trodes 1 XX refers...

Page 16: ...0 1 DC TIG starter An electrode cable work cable TIG torch and gas sup ply are required Refer to Accessories section of this manual METER POLARITY SWITCH The switch is located on the control panel at...

Page 17: ...by a 2 5 amp circuit breaker with a reset button locat ed on the rear control panel The 24 42 and 115 VAC supplies must not be loaded at the same time NOTE 110 115 VAC is not available on Codes 9827...

Page 18: ...C Return to Master TOC Return to Master TOC Accessories Section C Options Accessories C 1 Connecting a LN 25 Wire Feeder C 2 Connecting a LN 7 Wire Feeder C 4 Connecting a LN 9 GMA Wire Feeder C 6 Con...

Page 19: ...its remote control circuitry to a 6 pin receptacle and to a 14 pin receptacle Adapter permits remote output control of Invertec by means of K857 Remote Control K812 Hand Amptrol or K870 Foot Amptrol A...

Page 20: ...d persons should install use or service this machine using the disconnect switch at the fuse box WARNING Turn off input power to the Welding Power Source Before connecting the wire feeder ELECTRIC SHO...

Page 21: ...S I Z E D F O R C U R R E N T A N D D U T Y C Y C L E O F A P P L I C A T I O N N B D I A G R A M S H O W S E L E C T R O D E P O S I T I V E T O C H A N G E P O L A R I T Y T U R N P O W E R O F F R...

Page 22: ...ified persons should install use or service this machine using the disconnect switch at the fuse box WARNING Turn off input power to the Welding Power Source Before connecting the wire feeder ELECTRIC...

Page 23: ...Y E L E C T R O D E C A B L E T O L N 7 T O W O R K 1 4 P I N A M P H E N O L S P A R E 8 2 8 1 4 2 4 1 3 1 3 2 2 4 2 1 G N D 7 5 7 6 7 7 3 1 3 2 2 4 2 1 G N D N C K 2 9 1 O R K 4 0 4 I N P U T C A B...

Page 24: ...ING Turn off input power to the Welding Power Source Before connecting the wire feeder ELECTRIC SHOCK CAN KILL N A W E L D I N G C A B L E M U S T B E S I Z E D F O R C U R R E N T A N D D U T Y C Y C...

Page 25: ...N P O W E R O F F R E V E R S E E L E C T R O D E A N D W O R K C A B L E A T P O W E R S O U R C E S E T M E T E R P O L A R I T Y S W I T C H O N R E A R O F I N V E R T E C T O C O I N C I D E W I...

Page 26: ...5 5 A M P 1 1 5 V A C 2 A M P I N V E R T E C F R A M E C O N N E C T I O N N D N D F O R W I R E F E E D E R S T H A T R E T U R N A S I G N A L F O R W E L D I N G O U T P U T U S E I S O L A T I O...

Page 27: ...A L L I N G P L U G S O N C A B L E S O R W H E N C O N N E C T I N G O R D I S C O N N E C T I N G P L U G S T O W E L D I N G P O W E R S O U R C E S T R A I G H T P L U G 1 4 P I N T O P O W E R S...

Page 28: ...ssories K867 K775 K843 and K812 or K870 are required In this configuration K775 remote control sets the upper current limit of K812 hand Amptrol or K870 foot Amptrol See connection diagram S19432 3 Co...

Page 29: ...se or service this machine Turn off input power to the Welding Power Source using the disconnect switch at the fuse box before connecting the DC Tig I N O U T K 9 0 0 1 T O T I G T O R C H K 8 1 2 H A...

Page 30: ...the other This will minimize nuisance feed back conditions In general more than two machines in parallel will not be effective due to voltage requirements of procedures in that power range 1 Set machi...

Page 31: ...performing preventative maintenance perform the follow ing capacitor discharge procedure to avoid electric shock Only qualified personnel should perform this maintenance Turn the input power OFF at th...

Page 32: ...capaci tor on each side of machine 8 Check voltage across terminals of all capacitors with a DC voltmeter Polarity of capacitor terminals is marked on PC board above terminals Voltage should be zero...

Page 33: ...ding should be 500 000 ohms or more If meter reading is less than 500 000 ohms check for electrical com ponents that are not properly insulated from the case Correct insulation if need ed 7 Replace ma...

Page 34: ...C Return to Master TOC Return to Master TOC D 3 MAINTENANCE FIGURE D 2 LOCATION OF MAINTENANCE COMPONENTS ITEM COMPONENT QTY NO PC BOARDS CONTROL 1 1 DRIVER 1 2 PROTECTION 1 3 SWITCH 2 7 POWER 1 10 IN...

Page 35: ...r TOC Return to Master TOC INVERTEC V300 I Theory of Operation Section Section E Power Supply Operation E 1 Field Effect Transistor FET Operation E 5 Pulse Width Modulation E 6 Protective Circuits E 7...

Page 36: ...and connect the auxil POWER SUPPLY OPERATION FIGURE E 1 INPUT POWER CIRCUITS 1 OR 3 DETETCTION H5 LINE SWITCH INPUT RECTIFIER AC1 AC2 AC3 A LEAD AUXILIARY TRANSFORMER TO WIREFEEDER 18VAC 24VAC POWERBO...

Page 37: ...nput filter capacitors The Protection Board monitors the capacitors for voltage balance and or overvoltage and will de energize the input relays and precharge circuitry if either occurs The machine ou...

Page 38: ...nt flow through the main transformer primary and the offset timing of the Switch Boards induce an AC square wave output signal at the secondary of the main trans former The DC current flow through eac...

Page 39: ...t terminals and fed to the Control Board The Control Board also monitors the panel controls to deter mine which weld process is being employed and how the output should be controlled to optimize weldi...

Page 40: ...s as long as the gate signal is present This is similar to turning on a light switch An FET is a type of transistor FETs are semiconductors well suited for high fre quency switching Drawing A above sh...

Page 41: ...he more dark area under the curve the more power is present The term PULSE WIDTH MODULATION is used to describe how much time is devoted to conduction in the positive and negative portions of the cycl...

Page 42: ...The fan problem or air obstruction must also be corrected PROTECTIVE CIRCUITS Protective circuits are designed into the Invertec machine to sense trouble and shut down the machine before the trouble...

Page 43: ...rigger Circuit Test F 35 Thermal Protection AC Trigger Circuit Test F 41 Control Board Test F 46 Power Board Test F 47 Capacitor Replacement F 50 Switch PC Board Replacement F 54 Test After Repair of...

Page 44: ...ur problem All the needed test specifications and repair procedures are described in detail on the referenced pages All the needed electrical test points terminal strips junctions etc can be found on...

Page 45: ...hot parts WARNING 4 Test the machine to determine if the fail ure symptom has been corrected by the replacement PC board NOTE Allow the machine to heat up so that all electrical components can reach...

Page 46: ...eing used Check continuity of 3 amp slow blow fuse located on reconnect panel Output Terminal Switch or Remote Trigger MUST be in ON position Local Remote Switch must be in LOCAL position unless remot...

Page 47: ...ltages and recon nection procedures See Instal lation section Check output terminal switch S4 and or Remote Trigger Options i e wire feeders guns cables etc Test or replace Output Remote Control Devic...

Page 48: ...and input voltage reconnect proce dures See Installation section of this manual Normal operation Nothing is wrong Check input voltage and input volt age reconnect procedures See Installation section...

Page 49: ...2 VDC and output is extremely low or no output POSSIBLE AREAS OF MISADJUSTMENT S Local Remote Switch must be in LOCAL position unless Remote Control device is attached to remote receptacle POSSIBLE AR...

Page 50: ...DRY Try welding with another electrode from a different container Make sure you have the correct electrode for your application Check input lines and connections Check input voltage and reconnec tion...

Page 51: ...four screws that attach the Control Panel to the frame TEST DESCRIPTION The Output Pilot Circuit Test determines if the Fan Thermostat Choke Thermostat Transformer T1 and Output Terminal Switch S4 are...

Page 52: ...itch S4 Go to step 8 b If 0 VAC is measured test is not OK Test each of the following compo nents Fan Thermostat Choke Thermostat Transformer T1 and Output Terminal Switch S4 4 Position the Control Pa...

Page 53: ...ter TOC F 10 TROUBLESHOOTING REPAIR 8 Test for 15 VDC between leads 302 and 275D a If 15 VDC is measured test is OK for 15 VDC Power Supply and Trans former T1 Go to Protection Board Output Test b If...

Page 54: ...resistors As the through bolts are removed care fully place the resistors and the connect ed wires to the side TEST PROCEDURE 1 Turn main power OFF 2 Perform Input Filter Capacitor Discharge procedur...

Page 55: ...ter TOC Return to Master TOC F 12 TROUBLESHOOTING REPAIR 5 Remove the two screws attaching the Protection Board Input Rectifier bracket to main assembly bracket 6 Tilt the top of the Protection Board...

Page 56: ...position on Control Panel 7 With power OFF disconnect J8 and attach voltage probes into back of wire harness lead junction block J8 See Figure F 7 Insert probes into back of the connec tion cavities...

Page 57: ...ction Board is OK If voltage is greater than 14 VDC Protection Board is faulty See Figure F 28 10 Test for less than 1 VDC between leads 313 and 311 a If less than 1 VDC is measured test is OK and Pro...

Page 58: ...ve Output Terminal Switch S4 to REMOTE OFF position NOTE This test should only be conducted when the machine reconnect switch and jumper are set for high voltage above 380 VAC and the proper line volt...

Page 59: ...16 TROUBLESHOOTING REPAIR 2 Test VDC across terminals 9 and 12 of one Switch Board and repeat the test for the other Switch Board See Table F 1 in this procedure for expected voltage readings NOTE Fo...

Page 60: ...s C1 C2 C14 and C15 and Resistors R1 and R9 3 Record VDC measured for each Switch Board and determine the difference in VDC NOTE The following measurements should result based on VAC input TABLE F 1 E...

Page 61: ...just the output control to the minimum setting Place the mode control at the SMAW soft position NOTE This test should only be conducted when the machine reconnect switch and jumper are set for high vo...

Page 62: ...st these PC boards and replace if needed 2 Test VDC across terminals 9 and 12 of one Switch Board and repeat the test for the other Switch Board NOTE For 575 VAC ONLY compare voltage across 9A and 13...

Page 63: ...ly In addition it is dangerous to work on these boards with machine power ON LOCATION There are two Switch Boards One is located on each side of the machine FUNCTION The Switch Boards are designed to...

Page 64: ...lacement procedure 5 If the Switch Boards appear to be burned or overheated or if the machine was supplied by a 380 VAC or higher voltage supply when the failure occurred replace the Capacitors and th...

Page 65: ...than Open Replace both Snubber Test 1K ohm Switch Boards 9 4 5 Greater than OK None Continue 1K ohm Less than Shorted Replace both Snubber Test 100 ohms Switch Boards 4 5 9 Less than OK None Continue...

Page 66: ...ult Conclusion Repair Action Next Procedure Notes 12 401 403 Greater than OK None Continue 1K ohm Less than Shorted Replace both Snubber Test 100 ohms Switch Boards 401 403 12 Less than OK None Contin...

Page 67: ...m Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion 3 Locate and gain access to the Switch Board 4 Remove leads from terminals 401 402 403 and 404 on Switch Board MATERIALS N...

Page 68: ...esistor R4 is OK b If 30 ohms or more is measured Resistor R4 is faulty and must be replaced SNUBBER RESISTORS TEST continued FIGURE F 14 SWITCH BOARD TEST POINTS L8604 1 SWITCH 401 12 Check Test Resu...

Page 69: ...SHOOTING REPAIR TEST PROCEDURE 1 Perform Input Filter Capacitor Discharge procedure detailed in Maintenace sec tion ELECTRIC SHOCK can kill Observe all safety precautions detailed throughout this manu...

Page 70: ...Output Diodes are OK b If less than 100 ohms measured an Output Diode is shorted Test all Output Diodes D 1 thru D 12 indi vidually 3 Remove any output load 4 Test for more than 200 ohms resistance be...

Page 71: ...I wiring diagrams TEST PROCEDURE 1 Perform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion 2 Locate Input Rectifier Component D 13 3 Locate leads needed to perform tests s...

Page 72: ...nent D13 when any of tests A L are not OK NOTE When installing new Input Rectifier torque mounting nuts in a cross tightening pattern to 6 inch pounds 7 Nm Torque terminals to 26 inch pounds 3 Nm ALWA...

Page 73: ...n 225 275 amps for single phase The functioning circuit will reduce the output amperage to approximately 200 amps in three phase operation 100 190 amps sin gle phase when overcurrent loading is detect...

Page 74: ...urn to Master TOC F 31 TROUBLESHOOTING REPAIR TEST PROCEDURE 1 Perform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion 2 Remove front panel from machine to access Control B...

Page 75: ...TOC F 32 TROUBLESHOOTING REPAIR 4 Turn main power ON 5 Test for 15 VDC between leads 302 and 275D a If 15 VDC is present test is OK Go to step 6 b If 15 VDC is not present check Power Board and leads...

Page 76: ...erform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion Test resistance between pin 1J3 and black lead from Control Board to shunt See Figure F 22 a If zero ohms resistance...

Page 77: ...Board should be replaced 8 Test resistance between pin 2J3 to white lead from Control Board to shunt a If zero ohms resistance continuity is shown test is OK See note below b If resistance of any val...

Page 78: ...lied to the Input Filter Capacitors If an overvoltage is sensed from conditions such as misconnections or line surges the Output Trigger Circuit and the Input Power Relays are opened caus ing the mach...

Page 79: ...main power ON 6 Move the Output Terminal Switch S4 to the ON position closed TEST PROCEDURE 1 Turn main power OFF 2 Perform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion...

Page 80: ...o Master TOC Return to Master TOC F 37 TROUBLESHOOTING REPAIR 7 Test for 0 VDC between leads 311 and 313 on Protection Board a If 0 1 VDC is present the Protection Board is OK Go to step 8 b If 15 VDC...

Page 81: ...operly b If 15 VDC is present go to step 10 8 Test for 15 VDC supply voltage between leads 302 and 275D on Power Board a If 15 VDC is present test is OK Go to step 9 b If 15 VDC is not present the Pow...

Page 82: ...TOC F 39 TROUBLESHOOTING REPAIR 10 Test for 0 1 VDC between leads 301 and 275D on Power Board a If 0 1 VDC is present AC trigger Control Board and Power Board are operating properly b If 15 VDC is pre...

Page 83: ...test Capacitor balance Refer to Static and Dynamic Capacitor Balance Tests OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT TEST continued FIGURE F 28 OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT THESE LEADS AR...

Page 84: ...e choke thermostat will open the normally closed output trigger circuit if overheating occurs due to excessive output loading and or excessive duty cycle The fan thermostat will open the normally clos...

Page 85: ...Turn main power OFF 2 Perform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion 3 Detach the following PC boards so you can gain access to and have ample room to perform the...

Page 86: ...T1 and leads used for test See Figure F 30 5 Turn main power ON THERMAL PROTECTION AC TRIGGER CIRCUIT TEST continued FIGURE F 30 THERMAL PROTECTION AC TRIGGER CIRCUIT CONTROL BOARD POWER BOARD T1 11J...

Page 87: ...VAC is present test input voltage to Auxiliary Transformer c If input voltage to Auxiliary Transfor mer is correct replace Auxiliary Transformer d If input voltage to Auxiliary Transfor mer is not co...

Page 88: ...32 THERMAL PROTECTION AC TRIGGER CIRCUIT CONTROL BOARD POWER BOARD T1 11J4 EXTERNAL TRIGGER S4 OUTPUT TERMINAL SWITCH FAN THERMOSTAT CHOKE THERMOSTAT PART OF 14 PIN AMPHENOL NORMALLY CLOSED NOTE WHEN...

Page 89: ...ction problems FUNCTION The Control Board monitors the panel controls to determine which weld process is being employed and how the out put should be controlled to optimize welding results The Control...

Page 90: ...er Board is probably OK NOTE If there is still a possibility that the Power Board is faulty go to Test B b If audible click of control relay con tacts closing is not heard Power Board could be faulty...

Page 91: ...C Return to Master TOC F 48 TROUBLESHOOTING REPAIR 4 Detach Control Panel by removing the four mounting screws Move the panel to the left to gain access to the Power Board 5 Turn main power ON Test B...

Page 92: ...red Power Board is OK b If 15 VDC output is not measured replace Power Board 6 Test for 18 VAC input from Auxiliary Transformer between leads 504 and 501 J7 on Power Board a If 18 VAC is measured inpu...

Page 93: ...ust always be replaced in matched sets C1 and C2 as a set or C1 C2 C14 and C15 as a set on 575 VAC machines When replacing Capacitors remove the entire FET heat sink assembly including Capacitors and...

Page 94: ...o Master TOC F 51 TROUBLESHOOTING REPAIR 2 Place the machine on its side as shown in Figure F 38 Slide the plastic insula tors that go through the base of the machine to one side Pull the through bolt...

Page 95: ...C Return to Master TOC F 52 TROUBLESHOOTING REPAIR 4 Loosen the set screw of the Capacitor clamp ring and remove the Capacitor from the clamp ring See Figure F 40 3 Remove the two 7 16 hex nuts that h...

Page 96: ...ity must be noted when attaching the capacitor to the Switch Board assembly 5 Install the new Capacitor and tighten the two 7 16 hex nuts to a torque of 55 inch pounds 6 Nm Tighten these nuts in incre...

Page 97: ...rd is defective both Switch Boards must be replaced at the same time In addition to replacing the Switch Boards Capacitors C1 and C2 plus C14 and C15 on 575 VAC models must also be replaced if the fol...

Page 98: ...lways make sure that Switch Boards are changed in matched pairs Never mix an old style different part num ber Switch Board with a new style new part number 3 Remove the two 7 16 head Capacitor screws...

Page 99: ...nd 12 of one Switch Board The meter will show the Capacitors charging up and may take a minute or so to stabilize The final meter reading should not exceed 8600 ohms 8 6 on the scale TEST AFTER REPAIR...

Page 100: ...ly fuse holders 13 Install 20 amp fuses and test under load NOTE A resistive type grid load bank is recommended 14 Perform Retest After Repair 8 Turn on the machine 9 With the output free of a load ch...

Page 101: ...o a torque of 25 inch pounds 3 Nm 1 Turn main power OFF 2 Perform Input Filter Capacitor Discharge procedure detailed in Maintenance sec tion 3 Detach and remove both Switch Boards and attached capaci...

Page 102: ...for a long period of time many months Then The Input Filter Capacitor Protection Circuit could have been activated and prevented output This means the Input Filter Capacitors must be conditioned The I...

Page 103: ...5 460 60 1 50 450 380 50 or 60 1 67 425 575 60 INPUT IDLE AMPS AND IDLE WATTS Min Acceptable Max All Modes V300 I V300 PRO 1 phase 200A 380V 220 440V 208V 230 460V 575V 38V 38V 36V 3 phase 300A 32V 36...

Page 104: ...INVERTEC V300 I 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 F 61 NOTES...

Page 105: ...oard G 4 Switch Board G 8 Power Board G 10 Driver Board L8660 1 G 12 Driver Board L9134 1 G 13 Wiring Diagrams Code 9826 G 14 Code 9827 G 15 Code 10036 G 16 Code 10037 G 17 Code 10132 G 18 Code 10133...

Page 106: ...ty for liabilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not avail able from Lincoln Electri...

Page 107: ...rmet trmr 25W 1 5K ohm R14 RESISTOR MF 25W 1 100K ohm R15 RESISTOR MF 25W 1 475 ohm R18 R26 R28 R32 RESISTOR MF 25W 1 10K ohm R19 RESISTOR MF 25W 1 3 32K ohm R21 R23 R24 R25 RESISTOR MF 25W 1 15K R29...

Page 108: ...no responsibility for liabilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not avail able from...

Page 109: ...3V 5 1N4755A J1 RECEPTACLE Molex mini 8 pin J2 RECEPTACLE Molex mini 4 pin J3 RECEPTACLE Molex mini 2 pin J4 RECEPTACLE Molex mini 12 pin J5 RECEPTACLE Molex mini 14 pin OCI1 OPTOCOUPLER Photo Q 70V C...

Page 110: ...ISTOR MF 25W 1 24 3K R82 R120 R128 RESISTOR MF 25W 1 301 R83 RESISTOR MF 25W 1 267K R95 TRIMMER ST 50W 10 10K linear R96 RESISTOR MF 25W1 825 R131 RESISTOR MF 25W 1 68 1K R146 RESISTOR MF 25W 1 28 0K...

Page 111: ...G 7 NOTES INVERTEC V300 I 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 112: ...abilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not avail able from Lincoln Electric This in...

Page 113: ...hm R2 R4 RESISTOR MF 25W 1 221 ohm R6 R8 R9 R17 R19 RESISTOR MF 25W 1 10 0 ohm R25 R26 R27 R33 R34 R7 R30 RESISTOR MF 25W 1 1 50K ohm R10 R32 RESISTOR MF 25W 1 15 0K ohm R11 R15 R22 R28 RESISTOR CC 50...

Page 114: ...responsibility for liabilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not avail able from Li...

Page 115: ...R27 10K 1 4W R5 R6 R10 R22 100K 1 4W R4 1 5K 1 4W R14 R41 15K 1 4W R9 1150K 1 4W R21 2 21K 1 4W R3 243 1 4W R7 R8 R24 267 1 4W R2 2 67K 1 4W R18 26 7K 1 4W R20 267K 1 4W R13 R15 R16 R17 33 2K 1 4W R23...

Page 116: ...WW 20W 5 250K R3 R4 R5 R6 R8 R9 RESISTOR MF 25W 1 150K R7 R12 RESISTOR MF 25W 1 100K T1 TRANSFORMER PCB NOTE Individual parts listed are not available from Lincoln Electric DRIVER BOARD L8660 R 1 3 R...

Page 117: ...X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X L 9 1 3 4 NOTE Lincoln Electric assumes no responsibility for liabilities resulting from board...

Page 118: ...2 1 0 2 7 5 A 1 3 4 2 1 2 5 0 2 2 1 5 3 0 6 5 9 2 2 3 B 5 0 2 Y S 5 M E T E R F U N C T I O N S W I T C H 3 0 1 D 6 D 4 D 5 J 5 J 6 D 1 1 D 1 2 D 1 0 D 9 D 8 D 7 N E 2 2 4 2 1 0 2 A M P 6 A M P 1 1 0...

Page 119: ...5 M E T E R F U N C T I O N S W I T C H 3 0 1 D 6 D 4 D 5 J 5 J 6 D 1 1 D 1 2 D 1 0 D 9 D 8 D 7 N E 2 2 4 2 1 0 6 A M P H 2 H 3 H 4 A 1 2 B 9 B 9 B R 9 1 2 C 9 A 5 3 1 2 A 9 C H 5 3 1 1 2 7 5 F 3 0 6...

Page 120: ...4 5 0 V N G N F N G 2 2 0 0 F 4 5 0 V 224 T P 6 2 1 2 A 2 1 2 B R E M O T E O N S 4 O U T P U T T E R M I N A L S W I T C H 2 1 2 B 2 1 2 2 2 3 B 2 1 2 C 1 5 0 5 W F A N T H E R M O S T A T H 2 H 3 H...

Page 121: ...2 1 2 A 2 1 2 B R E M O T E O N S 4 O U T P U T T E R M I N A L S W I T C H 2 1 2 2 2 3 B 2 1 2 C 1 5 0 5 W F A N T H E R M O S T A T H 2 H 3 H 4 F B O T T O M A U X S F B O T T O M F S T O P A U X F...

Page 122: ...C T R I C C O D E C O N N E C T B L A C K R E D W H I T E L E A D S T O S U P P L Y C I R C U I T W R A P R E D L E A D W I T H T A P E T O P R O V I D E 6 0 0 V I N S U L A T I O N F O R T H R E E P...

Page 123: ...D W I T H T A P E T O P R O V I D E 6 0 0 V I N S U L A T I O N F O R T H R E E P H A S E I N P U T G R O U N D M A C H I N E P E R N A T I O N A L A N D L O C A L E L E C T R I C A L C O D E S C O N...

Page 124: ...G F E J A I K C D M L B N H 7 5 7 6 7 7 3 1 3 2 4 1 4 2 2 4 8 1 8 2 2 1 4 2 V A C R E M O T E C O N T R O L R E C E P T A C L E T R I G G E R 2 1 2 2 1 2 3 2 4 2 2 1 2 1 2 C B 1 C B 2 2 2 3 B 2 1 2 C...

Page 125: ...roubleshooting PC Board repairs will invalidate your factory warranty This Printed Circuit Board schematic is provided for reference only It may not be totally applicable to your machine s specific PC...

Page 126: ...roubleshooting PC Board repairs will invalidate your factory warranty This Printed Circuit Board schematic is provided for reference only It may not be totally applicable to your machine s specific PC...

Page 127: ...C O N N E C T I O N I N V E R T E C V 3 0 0 L 4 2 1 0 M F D 4 4 0 2 4 0 4 POSITIVE 1N4936 D 4 1W 15V D Z 4 4 7 5 R 1 8 10 0 R 9 10 0 R 8 10 0 R17 10 0 R 3 3 C 7 10 0 R 6 RESISTOR S N U B B E R P O W E...

Page 128: ...t 5 6 R15 1W 4 3 V DZ11 1W 3 9 0 R 3 5 J 4 11 CIRCUIT D12 CNY17 3 OCI1 4 2 1 6 5 22 1K R12 5 0 0 m W 3 V DZ1 5 0 V 2 0 C11 2 6 7 R11 47 5K R 7 2 67K R144 15V B B O A R D D14 22 1K R133 100 2 0 V C 7...

Page 129: ...ubleshooting PC Board repairs will invalidate your factory warranty This Printed Circuit Board schematic is provided for reference only It may not be totally applicable to your machine s specific PC b...

Page 130: ...leshooting PC Board repairs will invalidate your factory warranty This Printed Circuit Board schematic is provided for reference only It may not be totally applicable to your machine s specific PC boa...

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