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troubleshooting & repair - Red-D

1. 003 CNY17 3V REIS 6 e COM A 3 3 Sw O 206 N 4 FILTER PRIMARIES TRANSFORMER 218 33K SW 43K e L n3 023 FILTER 2215 5 208 capacttor J21 s gt RECONNECT 203 5 33K SW e R130 7e IK 02 R131 e 3 Pd 5W 0 202 e o 1600V C21 01A 1000V C23 L 0047 Ts 1000V na FILTER fo k CAPACITOR amp 0212 8 N PA SW R127 33K 5W 3 R126 e4 0723 15 1W 5 gt 15V B
2. 15Volts 250 SPI Overvoltage Shutdown 55VDC Tr i8 60 5Volts 3 Amps SPI 2m 5Volts 100 Amp CAN 20Volts gt gt 200 Amps Gate Drive 20Volts 5Volts 100 Amp 200 Amps 1 Gate Drive RS232 FILENAME G3631 2D0 GENERAL INFORMATION LAST NO USED ELECTRICAL SYMBOLS PER E1537 Re NOTES CAPACITORS 022 50V UNLESS OTHERWISE SPECIFIED e RESISTORS Ohms 4 4W UNLESS OTHERWISE SPECIFIED LABELS NA SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABLITY OF A COMPLETE BOARD THIS DIAGRAM MAY DIODES 1A4XV UNLESS OTHERWISE SPECIFIED NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER SUPPLY VOLTAGE NET POWER SUPPLY SOURCE POINT COMMON CONNECTION 7 FRAME CONNECTION
3. ITEM REQD PART NO IDENTIFICATION C1 23 2 5205004 CAPACITOR PPMF 0047 1000V BOX 10 11 2 13490 130 0 27 50 5 C2 C24 2 520500 7 047 1600 0 10 25 26 2 11157 57 CAPACITOR PEF 0 1 400V 10 C3 C18 2 13490 93 27 35 10 631 032 2 516668 7 820 50 5 4 21 2 5205001 0 1 1000 10 C5 C6 C15 C16 4 516668 6 4700 50 10 7 12 13 14 20 027 28 9 516668 5 022 50V 20 C29 C30 C8 C9 C22 3 516668 5 CAPACITOR CEMO 150p 100V 5 CR1 CR2 2 51429348 RELAY DPST 12VDC AG CDO D1 D4 D16 D17 4 T12705 59 DIODE AXLDS 3A 600V UFR D7 D8 D9 D12 D14 D18 D19 9 T12199 1 DIODE AXLDS 1A 400V D20 D21 DZ1 DZ2 DZ3 DZ5 DZ6 DZ15 10 12702 29 2 DIODE 1 15 5 1 4744 DZ16 DZ18 DZ19 DZ23 DZ11 DZ22 2 r127024 ZENER DIODE 1W 20V 5 1N4747A 24 027 0217 0220 4 112702 40 ZENER DIODE 1W 6 2V 5 1N4735A 078 1 12702 19 ZENER DIODE 1W 12V 5 1 4742 DZ9 DZ10 DZ12 DZ13 4 T12702 45 2 DIODE 1W 18V 5 1N4746A J20 J21 2 5240168 CONNECTOR MOLEX MINI PCB RT L 8 PIN 022 1__ 524016 4 4 1 0 12 0 13 3 515000 22 O
4. ADDR 1 19 N MMBT4401 EEEBEEE Vo ADDR1 7 48 o DATA ADDRI8 17 KENAA D77 ee c lt ADDRI9 16 26 RWT ANNA 10 0 R180 AN 10 0 R199 VVV 10 0K R200 VVV 5V 10 0K R181 AAA NN MOO 9812 5V TE28F800B5 B90 Vb I L 10 Yan 10 0K 5 3 R54 BERR X24 o FAN CONTROL AAA zea EREEZE CRYSTAL 85 ExTAL 5 7 90 4 75K C27 ME IBKPT XTAL CLKOUT 1 4 LESSENS 184 IRES 92 1 6S0 100pF 980 IRES BALT C30 P7122 151 CST ISC 80 rsc BGACK 52 5143 1 52 BERR 94 i 1 77 NOISE GND 15 D3 FREEZE 81 BERR IPIPE DSO 78 FREEZE _IFETCH DSI m wo oM R CO 22 eer ci 4 5 05 17 o ANA LEVEL IN NOISE OND SiG 516 FPGA DONE DONE 113 4 AD PY LEVEL IN 112 vLOVVL vVOVVL 475 AVEGPE2 RMGPE3 40 ADDR2 4 R187 IRLR120N 8 E ASIPE4 42 ADD SOFTS 44 ADDR6 DS PES 46 ADDR8 e 26 7K Q9 5120 6 LEZSZSINW ASL 5121 PE7 49 ADDR9 50 ADDRiO 10A 100V O 6SENSL 8 OUTPUT DUTPUT ON 102
5. VoLrs 1D WELD MODE amp UX HOT START CONTROL La 7 IRS D o th gl Welder Output Terminal Screws Input Power Switch Screws 5 16 Screws V350 PRO LINCOLN 5 74 74 TROUBLESHOOTING amp REPAIR STATUS BOARD REMOVAL AND REPLACEMENT continued 10 Remove plug 311 and plug 31 from the sta 16 Replace the four phillips head screws removed tus board from the front of the machine located around the two welder output terminals 11 Remove plug 37 originating from the display board located directly above the status board 17 Replace the six phillips head screws and their washers from around the input power switch 12 Remove the status board Note Gentle prying from behind the board will be required 18 Using a 5 16 nut driver replace the four screws previously removed from the front of the machine 13 Replace the status board 19 Replace the case wraparound cover 14 Replace plug 37 previously removed 15 Replace plug 31 and plug 311 previously removed V350 PRO LINCOLN 5 75 F 75 TROUBLESHOOTING amp REPAIR SNUBBER BOARD REMOVAL AND REPLACEMENT WARNING Service and repair should be performed by onl
6. On 100000000 1 e L Gig 4 Cii RIGE COMPONENT SIDE 114 1L 1 1 me J I rn 8 09 vou Fees cot R264 R265 R282 EE A 2 cal R167 R133 w OTHER COMPONENT SIDE BACKSIDE L11088 D DIGITAL CONTROL BD BLANK M19436 1 POTTING TRAY 58053 80 SELF TAPPING SCREW E2527 EPOXY ENCAPSULATION RESIN E3539 ELECTRICAL INSULATING COMPOUND 524803 1 FLASH SOFTWARE 524804 2 CPLD SOFTWARE 524671 PLUG KEYING PLUG E3868 4 BAR CODE LABEL FOR ITEMS LISTED BELOW REFER TO ELECTRICAL DATABASE FOR COMPONENT SPECIFICATIONS 525020 35 SCAP 0 1uF 0805 50V X7R 10 TR C138 C134 C133
7. P1 5 AD13 39 XTAL1 P1 6 AD14 XTAL2 P1 7 AD15 VSS2 VSS1 LA ZUINOO 9L AN82527 DATA 0 15 C N COMMUNICATION CIRCUITRY SRY 0658151 LED8 Y GREEN 5 R198 150 lt 81 97 BUssL R196 BUSS_H c121 Vecan MAX485 TRANSCEIVER GCAN ISOLATION BARRRIER Vocan GCAN 9 WE Ae SL OcesHWSL 026890151 COMMUNICATION CIRCUITRY THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A EQUIPMENT TYPE UM MANUFACTURING TOLERANCE PER E2056 0 N2 ADEGREE TO AGREE DS WITH PUBLISHI CEDAR TIS ORANG NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual PLACE DECIMALS IS 102 PLACE DECIMALS 1002 XM5626 6 2 2000A INVERTER WELDERS DRAWNBY FM swecr ENGINEER DIGITAL CONTROL SCHEMATIC DAIEI2 15 99 DRAWINGNo 3789 100 2 E G 5 V350 PRO G 6 SCHEMATIC CONTROL PC BOARD 3 D99 210A X MURS320T3 MURS32OT D1 00 1 5358 244 9555
8. 14 PIN TRIG CLSO SEE X41L 6 PIN 76 PIN 76 MISO CPLD OUT AND POWE R SUPPLIE 41 AD Vase xi HC14AD 100pF 1000 Wise PERIPHERAL SUPPLY AL 600mA MAX DRAW ay ea 18 MIN to 50 MAX 0 4 J331 100v PERIPHERAL COM xi HCLAAD 105 16 Vcc Vad HC151D x8 3680 GND x10 MC14489DW vss GND 8 gt SEE X412 6 PIN CNCTD CONNECTED z H UNCONNECTED TL77261D DG201ADY 6 PIN DETECT ON OFF SEE X102 33074D 200K 01 SEE J3313 10 0K 01W 32K 1w asse 6 PIN REMOTE CONNECTED DETECTION CKT 6 PIN REMOTE SIGNAL CONDITIONING CKT 6 PIN 76 LINE SIGNAL gt E 7 LM 6 PIN 76 12 LA DATALIN yp 8 Rx MC14 89DW DATA DU BANKI BANKZ BANKA 13 1 3680 SEE BLOCK A D ENABLE HC1650 it
9. us c WY 2 d Switch Screws KY SE TZ ae N zt 5 16 Screws V350 PRO LINCOLN 5 53 F 53 TROUBLESHOOTING amp REPAIR CONTROL BOARD REMOVAL AND REPLACEMENT continued FIGURE F 18 METAL PLATE LOCATION 5 16 Screws Metal Plate 9 Using a 5 16 nut driver or a flathead screwdriver CAUTION remove the metal plate on the top of the machine that holds the case front assembly to the center panel There are two nylon cable ties that will Observe static precautions detailed in need to be cut in order for the metal plate to be Board Troubleshooting Procedures at the removed See Figure F 18 beginning of this section 10 The control board is now accessible to replace 8 The front of the machine may now gently be pulled forward to gain access to the Control Board Note The front of the machine cannot be removed com pletely only pulled forward a few inches V350 PRO LINCOLN 5 m TROUBLESHOOTING amp REPAIR i CONTROL BOARD REMOVAL AND REPLACEMENT continued 11 Beginning at the right side of the machine 13 Working your way down the left side of the board remove plugs J 10A and J 10B Note Be sure to remove plugs 4 and 3 See Figure F 19 label each plugs position upon removal See Figure F 19 12 Working your way across the top of the board from right to left label and remove plugs 389 3 8 47
10. 155 1 LOGIC TABLE CHIP SELECT 3 BOARD 10 000 0001 5 DG201ADY V x15 ev 5 INPUTS gt CURRENT SENSE La CURRENT ON OFF 8 VREF 5 come 315 GSPINZ R140 AND R139 SETS PULL CURRENT EN R145 15 SHORTED R145 TAKES THE STEADY STATE CURREN DOWN TO 220 mA WHEN IT IS IN THE 0 760 mA WHEN PERIPHERAL SUPPLY X16 2842 08 PERIPHE RAL DRIV Nominal Operating Voltage 30VDC to 74VDC JIN 2 21K 3 2 21K amp 1W I SOLENOID DRIVE ON OFF 550 MA MAX NOT NUMBE NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual TO AMPHENOLS J331 000000 COMPONENTS OR CIRCUITRY ON PRINTED CIRCUIT BOARD MAY CHANGE THOUT AFFECTING THE INTERCHANGEABILITY OF COMPLETE BOARD HOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING COMMON CODE HIS DIAGRAM MAY WITH PUBLISHED STANDARDS PARES DG20 1ADY C THE LINCOLN ELECTRIC Ct PERIPHERAL COM V GENERAL INFORMATION PACITORS RESISTORS Ohms 1A 400V DIODES THE L
11. 5 5 5 be dangerous 5 a Welding may produce fumes and gases hazardous to health Avoid breathing these fumes and gases When welding keep your head out of the fume Use enough ventilation and or exhaust at the arc to keep fumes and gases away from the breathing zone When welding with electrodes which require special ventilation such as stainless or hard facing see instructions on container or MSDS or on lead or cadmium plated steel and other metals or coatings which produce highly toxic fumes keep exposure as low as possible and below Threshold Limit Values TLV using local exhaust or mechanical ventilation In confined spaces or in some circumstances outdoors a respirator may be required Additional precautions are also required when welding on galvanized steel Do not weld in locations near chlorinated hydrocarbon vapors coming from degreasing cleaning or spraying operations The heat and rays of the arc can react with solvent vapors to form phosgene a highly toxic gas and other irritating products Shielding gases used for arc welding can displace air and cause injury or death Always use enough ventilation especially in confined areas to insure breathing air is safe Read and understand the manufacturer s instructions for this equipment and the consumables to be used including the material safety data sheet MSDS and follow your employer s safety practices MSDS forms are a
12. PRIMARIES TRANSFORMER 33K 5W ASN IN pad HORN T2 gt FILTER CAPACITOR ey 2 NOTE 202 203 206 amp 207 BOLT ON WITH FILTER CAPS NEGATIVE 207 INPUT RECTIFIER c22 150pF 7 100V 022 x3 33074A 2 33074 V F CONVERTER 72 D8 Bik 400V e R40 10 0K e 11 V com 8 2 2 R38 10 0K TRI 1 R 143 X L 07 23 2 c 32 0 6 CR 2 D 21 T 3 00 4 LAST NO USED 1 4W UNLESS OTHERWISE SPECIFIED MFD 022 50V UNLESS OTHERWISE SPECIFIED UNLESS OTHERWISE SPECIFIED Ohms GENERAL INFORMATION ELECTRICAL SYMBOLS PER E1537 CAPACITORS RESISTORS DIODES 291 5VDC CAP 5 89VDC AT VREF B 1 000KHZ 1VDC CHANGE ON CAP 8HZ 33074 R135 1A 400V NOTE This diagram is for reference only It may not be accurate for all machines covered
13. 10 0 R252 1 AVS Mel e VecSZSWN ENABLE VCC BAV99LT D102 BAV99LT D103 Y BAV99LTD104 P1 BAV 9LT D105 BAV99LTD106 DH BAV99LTD107 7 B2 B3 B4 B5 B6 B7 DIR MATERIAL TOLERANCI WTH PUBLISHED 57 BEES MANUFACTURING TOLERANCE PERE206 N C E t DARDS TIS ORANG NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual Cho Sheet No 6 2 2000A EQUIPMENT TYPE THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A INVERTER WELDERS DIGITAL CONTROL SCHEMATIC pesos e DWIEI2 15 99 DRAWINGNo 3789 100 4 E V350 PRO G 8 PC BOARD ASSEMBLY CONTROL LINCOLN amp ELECTRIC NOTE Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln Electric discourages board level troubleshooting and repair
14. 20096 RS232 Supply 5VDC SPI Communications amp 415VDC 5VDC Supply Solenoid Supply Y Y Y 40VDC Remote Mode Status Display Board Panel Panel Panel Remote Control amp Trigger SWITCH BOARD amp MAIN TRANSFORMER There is one switch board in the Invertec V350 Pro This board incorporates two pairs of input capacitors two insulated gate bipolar transistor IGBT switching circuits a fan motor drive circuit and a voltage fre quency capacitor feedback circuit The two capaci tors in a pair are always in series with each other When the reconnect switch is in the lower voltage position the capacitor pairs are in parallel Thus two series capacitors in parallel with two series capacitors When the reconnect switch is in the high voltage posi tion the two capacitor pairs are in series Thus four capacitors in series This is required to accommodate the higher input voltages When the input capacitors are fully charged they act as power supplies for the IGBT switching circuits When welding output is required the Insulated Gate Bipolar Transistors switch the DC power from the input capacitors on and off thus supplying a pulsed DC current to the main transformer primary windings See IGBT Operation Discussion and Diagrams in this section Each IGBT switching circuit feeds current to a separate oppositely wound primary winding in the main transformer The reverse directions of current Optional Sole
15. gt ala c I m 2 A LED1 LED2 LED3 LED4 LED5 RED LED 10 0K 1 4W R2 R4 1 00 1 4W R3 R24 R25 4 75K 1 4W R5 R7 10K 1 2W TRIMMER R6 1 50 1 4W R9 R10 R11 R12 R13 R14 12 1K 1 4W R15 R16 R17 R18 R19 R26 R27_ 100 1 4W R20 267 1 4W R21 R23 475 1 4W 51 PUSHBUTTON SWITCH SPST IC HC14A SS SCHMITT INVERTER 2 17900 26 IC HC151 SS 8 INPUT MULTIPLEXER A1 517900 28 IC 3 STATE 2 BIT BUFFER MODE SELECT 4 2 17900 10 IC PI SO 8 BIT SS SHIFT REGISTER 6 ARB 27 M15105 7 1 1C 10 BIT SS A D CONVERTER 1 IC LED DISPLAY DRIVER 9 CAPACITORS MFD VOLTS Ed sy INDUCTANCE HENRIES 2 RESISTANCE OHMS BUY AS E 2 EX 15 19 E 20 Oo n 19400 4750 13381 17 S17900 8 ESSI E E 706 L11110 1A1 7 IDENTIFICATION CODE GROUND SIDE PART NO NOTES N A DO NOT COAT WITH ENCAPSULATION MATERIAL N B CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY SEE E2454 BEFORE HANDLING N C DO NOT INSERT THESE COMPONENTS N D THERE MUST NOT BE MORE THAN 010 GAP BETWEEN SPACERS OR BETWEEN SPACER amp LED OR BETWEEN SPACER amp P C BOARD ENCAPSULATE P C BOARD SPACERS amp LOWER HALF OF LED CONNECTOR MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION ENCAPSULATE WITH HUMISEAL 1A27LU PER E1844 OR WITH EQUIVALENT AS
16. Jd os a Input switch Input prs amp 100A Breaker Rectifier m ESO Reconnect Switch oe AA s nis 115VAC Fan Supply Auxiliary 115VAC 42VAC Transformer Machine Control Supply 15VDC 15VDC 6VDC To Control Board Output Voltage Sense jeubis 1991 Control Board SPI Communications amp 15VDC 5VDC Supply Solenoid Supply 40VDC 6 Pin Remote Control amp Trigger Remote Board Amphenol OUTPUT RECTIFIER AND CHOKE The output rectifier receives the AC output from the main transformer secondary and rectifies it to a DC voltage level Since the output choke is in series with the negative leg of the output rectifier and also in series with the welding load a filtered DC output is applied to the machine s output terminals Mode Status Display Panel Panel Panel Optional Solenoid NOTE Unshaded areas of Block Logic Diagram are the subject of discussion V350 PRO LINCOLN 5 E 5 Positive Output Terminal Negative Output Terminal THEORY OF OPERATION THERMAL PROTECTION Two normally closed NC thermostats protect the machine from excessive operating temperatures These thermostats are wired in series and are con nected to the control board One of the thermostats is located on the heat sink of the switch board and the other is located on the output choke Excessive
17. 524020 16 CON 16P TIN MININP 524020 12 CON 12P TIN MINLNP J4 524020 8 CON 8P TIN MINI NP or TH600 265 JB 520353 45 SICS MAXABSESA NP X29 25065 2SMT SICS 74ACTS73 OCTAL TRANS LAT X21 525070 75 SICS TMS320F240PQANP S15000 28SMT SICS HCPL 0601 OPTOCOUPLER 520353 5 SICS AN82527 X22 OCI2 OCH X28 525082 15 SXTL16MHZ HC40 20PF NP Yt 520353 15 SICS MC145407 RECEIVERIDRVR RS X16 525067 35 SICS ADG417 SPST CMOS SWT SO8 X13 X31 S17900 1MT 74HC245 NEW PACKAGE X33 515128 136 SICS OP 27G OPAMP SOB TRNP xi 515128 185 SICS MC33074 QUAD OPAMP SO14 T X8 X14 X20 525069 35 SICS 28F800B5 90 FLASH RO 90n X25 25069 4SMT SICS 128Kx16 20nS TSOP X27 M15101 14SMT 51 5 68332 X24 525068 85M 5 5 79105 X4 525065 3SMT SICS 74VHC14 NP X10 X30 525057 35 SICS ADB403ARU10 X6 X32 15105 95 SICS 7945 old package X12 515018 215 ICS MIC4451BM 2 525067 25 SICS ADG409BR X15 525070 35 1 5 9536 15 VO44 X17 25069 2SMT SICS 25128 SERIAL EEPRNP X11 515128 215 SICS LT1016 COMPARATOR X6 519869 8 SWT 78BO8S DIP SPST 8P NP 51
18. E E tal fe ofa ofasa DISP2 LEFT DISPLAY BLOCK HC368D NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual GENERAL INFORMATION ELECTRICAL SYMBOLS PER 1537 022 50 UNLESS OTHERWISE SPECIFIED MFD Ohms CAPACITORS RESISTORS DIODES 1 4W UNLESS OTHERWISE SPECIFIED UNLESS OTHERWISE SPECIFIED 1A 400V A SUPPLY VOLTAGE NET POWER SUPPLY SOURCE POINT 57 COMMON CONNECTION 7 FRAME CONNECTION WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD THIS DIAGRAM MAY SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE N A NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE NUMBER EARTH GROUND CONNECTION UNIFIED SPI PANELS DISPLAY PCB SCHEMATIC SUBJECT L11108 30 CLEVELAND OHIO U S A 01 FILENAME THE LINCOLN ELECTRIC CO SUP S D G pate 05 19 00 chk MLO THE LINCOLN ELECTRIC CO THE LINCOLN ELECTRIC CO 6 2 2000A Ch ge Sht No ON HOLES SIZES PER 2056 ON 2 PLACE DECIMALS S 02 ON PLACE DECIMALS 15 002 AND 15 NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF ON ALL ANGLES 15 5 OF DEGREE THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY UNLESS OTHERWISE SPECIFIED TOLERANCE MATERIAL TOLERANCE
19. gt w o J311 CONNECTOR MOLEXMINI PCB 4 PIN LED 1 LED 2 LED 3 LED 4 LED 6 LED 7 LED 9 LED 10 LED 11 LED 12 LED 13 LED 14 LED 15 LED 16 R1 R25 R2 R4 R6 R24 R27 R3 R22 R9 R10 R11 R12 R13 R14 R17 R18 R19 R23R26 T13657 11 zs gt RED LED 19400 1002 19400 1001 19400 4751 19400 1212 19400 1000 19400 2670 19400 4750 T13381 16 17900 8 17900 26 17900 28 17900 10 M15105 7 20496 1 T13657 11 RESISTOR MF 1 4W 10 0K 196 RESISTOR MF 1 4W 1 00K 196 RESISTOR MF 1 4W 4 75K 1 RESISTOR MF 1 4W 12 1K 1 RESISTOR MF 1 4W 100 1 RESISTOR MF 1 4W 267 1 RESISTOR MF 1 4W 475 1 SWITCH PUSHBUTTON SPST IC CMOS INVERTER SCHMITT HEXHC14A SS IC CMOS MUX DAT 8 INPUT HC151 SS IC CMOS HEX BUFFER 3 STATE 2 BIT 4 Bl IC CMOS REGISTER SHFT S PI SO 8 BIT SS IC CMOS CONVERTER A D MPU 10 BIT SS IC CMOS DRIVER DISPLAY LED CC MCU RED LED n a a a ro 2 2 ol e LED 5 LED 8 CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTANCE OHMS BUY AS D LEDs LEDs LEDs V STATUS INPUT SS LED LED2 LED 111107 2 L11107 2BO T IDENTIFICATION CODE
20. uw m mon gt 6 PIN TRIG CLSO 6 PIN RMT CNCTO 14 PIN RMT CNCTO 14 PIN TRIG 150 V A D DUTPUT DATA BANKS 6 PIN DETECT ON OFF gt 14 PIN DETECT ON OFF SOLENOID DRIVE ON OFF CHIP SEI AND BOA PULL CURRENT ON OFF 1650 MISO CPLD CUT SEE X413 CNCTD m 26 Heres 100K 7 01W Xs L CONNECTED UNCONNECTED TL7726ID 14 PIN REMOTE CONNECTED DETECTION CKT lt p PIN DETECT ON OFF SEE X10 1 14 PIN REMOTE SIGNAL CONDITIONING CKT m 330740 8 20 0K oiw 14 PIN SEE 3319 R119 20 0K 1w C51 C52 C58 12504 7501 7501 7 T 5 C36 6810 Ll 022 1W 7 Sov R68 909 914 14 PIN 76 LINE SIGNAL pau 2 SEE X52 xi TL772610 MOSI 6 PIN 76 LINE SIGNAL 14 PIN 76 LINE SIGNAL A D ENABLE K A D OUTPUT DATA Dout gt 105 1 coc fo Vref ANT vag 8 MC1450510W ANS CONVERTER Irs SCLK A D CONVE RSION Asse Y ERF ACE
21. wer K867 ADAPTER 16 432 INVERTEC _ POWER SOURCE 4 V350 PRO LINCOLN 5 dico LN 25 WITH GND o K431 OPTION 77 o C CONTROL CABLE C 6 C 6 ACCESSORIES CONNECTION OF THE LN 7 TO THE V350 PRO USING K480 CONTROL CABLE SEE FIGURE C 5 NOTE AN LN 7 CAN ONLY BE USED WITH A FAC TORY OR CE VERSION OF THE V350 PRO IF YOUR LN 7 COMES EQUIPPED WITH A K291 OR K404 INPUT CABLE REFER TO THE CONNECTION OF THE LN 7 USING K867 UNIVERSAL ADAPTER 1 Remove input power to the V350 PRO 2 Connectthe electrode cable from the K480 control cable to the terminal of the welder and to the LN 7 wire feeder Connect the work cable to the terminal of the welder NOTE Figure C 5 shows the electrode connected for positive polarity To change polarity shut the welder off and reverse the electrode and work cables at the output terminals NOTE Welding cable must be sized for current and duty cycle of application 3 Connect the input cable from the K480 control cable to the 115VAC 14 pin amphenol on the 350 and the input cable plug on the LN 7 Set the VOLTMETER switch to or depending on the polarity chosen Set CONTROL SELECT to REMOTE Set the MODE to the CV WIRE position Place the WELD TERMINALS SELECT in the REMOTE position Adjust wire feed speed at the LN 7 and adjust the welding
22. d ees Section B node EE us Section C Maintenance oar equo EROR brat nest emi Lost eiut ami TOt be tbe Uns Section D Theory of Operation Sia te e berba ter e RH Section E Troubleshooting and Section F How to Use Troubleshooting eene F 2 Troubleshootirig GUlde iuri tete toque et edet ore bt e PR tra IR b Ride td F 4 Test Procedures eee eine ameet e oe c o n dde P p Pet dtd d F 15 Replacement Procedures nen nnns F 51 2 22 et i B Section G Parts ManU 2 etae d qae ER RR P 369 Series V350 PRO LINCOLN 5 SectionA 1 Section A 1 TABLE OF CONTENTS INSTALLATION SECTION Installation Technical Sp cifiCations ss iuc ttr teet e ed deep is A 2 Input Grounding Connections menn A 3 Power Cord Connection oet ee Dee M RE DA CREER AREA ns A 3 Single ipte Let Ente rt Re ached Get A 3 Three Phase emere Bereit ee DER ep ERR Pe RS A 3 Parallel Operation c saa PR RH ERR EE GROUP REOR e er Ai A 3 Quick Disconnect Plugs ener EE A 3 LINCOLN 5 2 INSTALLATION A 2 TECHNICAL SPECIFICATIONS INVERTEC V350 PRO INPUT AC VOLTAGE amp DC OUTPUT Product Ordering Rated DC Output Weig
23. INFORMATION RESISTORS Ohms DIODES FILENAME ELECTRICAL SYMBOLS PER E1537 CAPACITORS MFD BOARD 10 x0000001 OUTPUTS X2 Y X5 CS X3 Pin 11 MISO FQ SA LAST NO USED R 27 6 UNLESS OTHERWISE SPECIFIED 32 UNLESS OTHERWISE SPECIF IED E 0 0 5 1 UNLESS OTHERWISE SPECIFIED M19372 1 COLN ELECTRIC CO ELAND OH SCALE IO U S A NONE pate 06 12 00 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual SUPPLY VOLTAGE NET POWER SUPPLY SOURCE POINT 57 COMMON CONNECTION 17H FRAME CONNECTION b EARTH GROUND CONNECTION EE Unified SPI Panels Mode Select Board Schematic SUBJECT SHT SUP S D O5 _ 19372 G 17 V350 PRO G 18 ELECTRICAL DIAGRAMS G 18 PC BOARD ASSEMBLY MODE SELECT PC BOARD REFERENCE 1 111110 1 P C BOARD BLANK 2 6 67 FLEX ASSEMBLY 414171 10 5 359 1 1 INSUL COMPOUND FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT SPECIFICATIONS 13490 104 C1 39 20V 516668 11 C2 C3 C4 C5 C6 C8 C11 C12 0 1 50V 13490 42 C7 C9 1 0 35V 516668 5 10 22 23 25 28 022 50V 516668 2 13 14 15 16 17 18 47P 100V 13490 40 C29 C30 C31 C32 2 7 50V 18248 10 T13657 11 19400 1002 19400 1001 19400 4751
24. APPROVED SCALE FULL DATE 5 II 2000 DRAWNG No G 3830 1 1 Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the machine V350 PRO G 13 ELECTRICAL DIAGRAMS G 13 SCHEMATIC DISPLAY PRINTED CIRCUIT BOARD i 6 E VIA 3 e VIA 1 s 12 x 10 DU H4AD T STROBE X2 HC151D 3 8 1 47 5K QIW R27 VIA 4 100 01W R26 R28 100K 01W HC368D uj N m HC165D HC368D 12 x3 1 LAST NO USED 11 2 D HC14AD y HC14AD TO CONVERT TO TEST CONNECT A SPDT SWITCH AS FOLLOWS POSITION B TO TEST CHIP SELECT 7 BOARDS POSITION A TO TEST ALL OT
25. EARTH GROUND CONNECTION THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A MANUFACTURING TOLERANCE E2056 NFO DESIGN INFORMATION REFERENCE EQUIPMENT TYPE Digital Systems ONS PLAGE DEGNAS Ss 00d 6220004 Jorawwey BY ON ALL ANGLES IS 4 5 OF DEGREE XB SUBJECT i woo 7 DATEII 30 98 DRAwNGNo C 3631 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual LINCOLN jo ELECTRIC V350 PRO G 10 PC BOARD ASSEMBLY POWER SUPPLY NOTE LINCOLN amp ELECTRIC ELECTRICAL DIAGRAMS HEATSINK MOUNTING DETAIL NOTES N A SEE HEAT SINK MOUNTING DETAILS N B ALL CONNECTORS MUST BE GREASED WITH ITEM 5 PRIOR TO ENCAPSULATION N C ATTACH ITEM 1 TO ITEM 2 2 PLACES WITH ITEM 3 TOURQUE 5 3 05 IN LB ITEM 1 SHOULD BE ALLIGNED SO THAT THE DISTANCE BETWEEN ITEM 1 s CONNECTORS AND ITEM 2 IS AS LARGE AS POSSIBLE ENCAPSULATION PER E1911 E TO A MINIMUM DEPTH SO
26. RS232 TXD lt 5V 9 t 6 1 R fin MC145407 14 BT4403 3 2 Q esa _689 ZO 181 LLS88VCSZSIWNIN 150pF D58 NS MMSZ5248BT1 Vers232 9256 4 5VRS232 091 vYVOVVL T 1 lt R167 __ lt 1 00K ETUE X16 15 D 6 MC145407 C62 10uF 16V 10VRS232 C66 Q 10VRS232 1 3 145407 94 10 16V VSS VCC C2 C2 Toug SVRS232 16V GRs232 V 8 7 6 5 oci2 HCPL 0601 Vers232 X16 1310 8 MC145407 X16 L111 pb 10 MC 145407 119875675 052 8V DAA MMSZ5248BT1 VGRS232 5VRS232 2 X16 R 14 145407 X1 R 16 MC 145407 61 92 35V ML ow ozesahs GREEN R137 1 00K m LED6 L6 3 9 ASL 1689 51 V NOISE GND R192 4 75 SYS RESET 413 5 CS ADDR 1 18 N Ra SES NS eo C115 7 Vb ALE AS RD E MODEI CAN INT DSACKO RESET X28 WRH P2 7 INT P2 6 ADO AD1 AD2 AD3 AD4 MOSI Al g ADS P1 3 AD11 AD6 SCLK P1 4 AD12 AD7 FULL DUPLEX RS232 COMMUNICATION LINK 2 WVGRs232
27. 525009 10015 ISRES 1K 5 2W TR NP R26 25001 33R2SMT 5 5 33 2 1206 1 1 4 R15 R16 525001 43225 ISRES 43 2K 1206 1 1 4W TR NP R18 R49 525001 44225 5 5 44 2 1206 1 1 4 R42 R51 525084 15 50 525084 25 55 5 5 5 TEMP TR NP R17 R24 25024 12SMT SCAP 4 7uF TAN 35V 20 TR NP C1 C10 C17 C18 C19 C20 C24 C33 C38 C3 C6 525024 25 e ISCAP 1uF TAN 3528 35V TR NP C23 C29 C30 C40 C47 525020 45 ISCAP 820pF 0805 50V COG 5 TR C4 C8 525020 55 ISCAP 2700pF 0805 50V X7R 5 TR C16 C42 25020 3SMT ISCAP 0 1uF 0805 50V X7R 10 TR C2 C5 C7 C9 C14 C21 C22 C25 C34 C39 C44 C53 525020 185 SCAP 10pF CER 0805 100V 5 TR C28 C32 525026 15 SCAP 33uF TAN 7343 25V 10 TR LOW ESR C11 525026 25 ISCAP 100uF TAN 7343 10V 2096 TR C35 C36 C37 C41 C43 525040 25 SDIO 1A 400V DO 214BA GLS NP D10 D12 D13 D14 D17 D24 D25 525080 15 SLED RED 1206 TR NP LED1 LED2 525040 35 SDIO MURD620CT 6A 200V ULTRA F 04 D18 525049 25 SDIO MBRA130LT3 1A 30V SCHOTTK D20 D21 D22 D23 25040 13 SDIO MURB1620CT 16A 200V D16 525044 135 SDIO 1SMB5934BT3 24V 3W
28. D25 D45 044 D17 09 06 D2 05 D7 08 035 D36 038 037 042 041 040 039 069 525044 95 SDIO 15MB5920BT3 6 2V NP D62 D61 060 D13 012 D1 046 525046 35 5010 575248 18 ZENER TR NP 053 052 058 059 525044 105 SDIO B5930 16V 1 5W ZENER TR N D18 015 D43 525044 55 SDIO 1SMB5931BT3 3W 18V 5 D27 032 D26 030 031 D29 D24 014 D16 525044 45 SDIO B5929 15V 1 5W ZENER TRN 010011 525040 55 SDIO BAV99LT1 SOT23 DUAL SWITC D66 050 033 049 019 078 079 0102 0103 0104 D105 D106 D107 525049 45 SDIO BATS4S DUAL 30V 200mA D34 D54 028 047 080 081 D82 083 5 BssmsS S NJISSISSIN 525080 25 SLED GRN 1206 TRNP LEDS LED1 LEDS LED3 LED2 LED4 LED6 25080 1SMT_ SLED RED 1206 TR NP_ LED LED10 525083 15 SIND FERRITEBEAD TRNP 1 525001 47525 Bes SRES 47 5K 1206 19o 1 8W TR NP R230 R27 R28 R26 R53 R29 R110 R57 525001 22115 SRES 2 21K 1206 1 6 1 8W NP R25 R13 R12 R32 R1 R31 R134 R66 525001 10019MT SRES 1K 1206 1 1 8W TR 9X0056 R171 R178 R177 R193 R231 R167 R61 R34 R89 R82 R163 R135 R136 R169 R131 R112 R60 R56 R126 R71 R54 R69 R68 R143 R144 R58 R206 R213 R214 R90 R168 R255 R256 525001 10029 SRES 10K MF 1206 1 1 8W R173 R191 R181 R164 R170 R172 R189 R186 R180 R91 R92 R93 R94 R95 RI R97 R98 R22 R174 R201 R185 R104 R87 R33 R99 R260 R261 R139 R140 R12
29. TROUBLESHOOTING amp REPAIR POWER BOARD REMOVAL AND REPLACEMENT continued FIGURE F 34 POWER BOARD LOCATION POWER BOARD LEFT SIDE PROCEDURE 1 Remove input power to the V350 PRO 3 Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section 2 Using a 5 16 nut driver remove the case wrap around cover 4 Locate the power board See Figure F 34 V350 PRO LINCOLN 5 ns TROUBLESHOOTING amp REPAIR s POWER BOARD REMOVAL AND REPLACEMENT continued 5 Locate the three plug connections J 41 J 42 and 9 Replace with new power board 43 See figure F 35 10 Secure the new power board into its proper posi 6 Carefully remove the three plugs from the power tion with the four screws and washers previously board removed 7 Remove the four screws and associated washers 11 Replace the three plugs previously removed atthe corners of the board using a flathead screw Plugs J 41 J 42 and J 43 driver Board is ready for removal Note the posi tion of washers upon removal 12 Replace the case wraparound cover 8 Remove the power board FIGURE F 35 POWER BOARD LEAD LOCATION a 0000 M o 442 ji J41 M J43 0000 Hu 0000 ANN V350 PRO LINCOLN 5 F 80 F 80 NOTES V350 PRO LINCOLN 5 81 TROUBLESHOOTING amp REPAIR i INPUT RECTIFIER REMOVAL
30. A fault or error code is displayed 1 See the Fault Code 1 See Fault Code Explanations For no apparent reason the weld ing characteristics have change 1 Check the welding cables for loose or faulty connection 2 Make sure the machine s mode and output are set correctly for the process being used CV CC TIG etc 3 If Mig welding make sure the shielding gas and wire speed are correct for the process being used 1 Perform the Voltage and 2 Perform the Current Transducer Test 3 Perform the Output Diode 4 The control board may be faulty CAUTION If for any reason you do not understand the test procedures or are unable to perform the test repairs safely con tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 5 9 TROUBLESHOOTING amp REPAIR FAULT CODES DESCRIPTION CORRECTIVE SERVICE FACILITY CORRECTIVE DEFINITION ACTION ACTION 31 Main transformer Turn the machine off and Perform the Main Switch primary over current back on to reset the machine If condition persists contact an Perform the Power authorized Lincoln Field Service Facility There may be a problem with the primary current sensors CT located on the main switch board See the Wiring diagram The control board may be faulty 32 Capacitor bank A Make sure the reconnect There may bea probl
31. CHECK 15 0 SUPPLY FROM POWER PC BOARD CHECK 5VDC SUPPLY FROM POWER PC BOARD CHECK 15VDC SUPPLY FROM POWER PC BOARD CHECK 5VDC SPI SUPPLY FROM POWER BOARD CHECK 5VDC RS232 SUPPLY FROM POWER PC BOARD CHECK 15VDC SPI SUPPLY FROM POWER BOARD CHECK 40VDC OPTIONAL SOLENOID SUPPLY FROM POWER PC BOARD CONNECTOR PLUG PIN NO 4 9 405 406 V350 PRO LINCOLN 5 NORMAL ACCEPTABLE LEAD NO VOLTAGE OR IDENTITY AEAGING 65 38 42 VDC 66 412 15 VDC 410 408 5 VDC 410 411 15 VDC 410 403 5 VDC 401 406 5 VDC 405 402 15 VDC 401 438 40 VDC 431 28 28 NOTES V350 PRO LINCOLN 5 29 29 TROUBLESHOOTING amp REPAIR OUTPUT DIODE MODULES TEST WARNING 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 electrical 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 troub
32. THEORY OF OPERATION SECTION Theory of Operation iicet ee ee etl e e tos Section E General Description conse ee e t oe de cule edere ie E 2 Input Line Voltage Auxiliary Transformer and E 2 Switch Board and Main lt 1 2 eene eene E 3 Power board Control Board and SPI E 4 Output Rectifier and Chokes cits ceri nb c ree EA ge E E 5 Thermal Protector de ree eet nap db nna E 6 Protection CinGults ss ee cde dtt i du et di e E ren E 6 Over current Protection a nene nnn nennen E 6 Under Over Voltage Protection nene E 6 Insulated Gate Bipolar Transistor IGBT Operation sseenm mm E 7 Pulse Width 8 Minimum M aximum 8 FIGURE E 1 V350 PRO BLOCK LOGIC DIAGRAM A To Control Main Switch Board Board xoeqpeoj queuing 0x 2 Positive Input switch Input SN Output amp 100A Breaker Rectifier p Current Terminal Pas v Negative Reconnect Output i Switch 7 Terminal IT O omm x Fe 115VAC Fan Supply Auxiliary 115VAC 42VAC
33. The Hot Start control regulates the starting current at arc initiation Hot Start can adjust starting cur rent up or down by 25 of the preset value The recommended setting for Hot Start is 5 where the initial current is equal to the preset current Figure 1 CASEFRONT REMOTE LOCAL OUTPUT WELD TERMINALS REMOTE ON g Ww g V350 PRO LINCOLN 5 4 The Arc Control regulates the relative Slope of the process Slope dynamically controls the force the arc has to penetrate an open root At the minimum setting Arc Control is very soft and is similar to the Stick Soft mode At the maximum setting the slope is reduced the OCV is reduced and the operator has full control off the arc force required to pene trate an open root joint For vertical down open root pipe welding applications the recommended setting is between 8 and 10 During welding a boost circuit increases the avail able voltage to minimize pop outs The boost cir cuit is independent of the OCV and only operates when an arc is lit TIG GTAW The TIG mode features continuous con trol from 5 to 425 amps The TIG mode can be run in either the TIG touch start or high frequency assisted start mode The Hot Start control selects the starting mode desired A setting of less than 5 the TIG lift star
34. remove leads 207 207A and 209 from the input rectifier Use the analog ohmmeter to perform the tests detailed Table F 2 See the Wiring Diagram Visually inspect the three MOV S for damage TP1 TP2 TP3 Replace if nec essary Figure F 3 Input Rectifier Small Lead H1 3 16 ALLEN BOLTS 207 207 209 Small Lead A lt lt FRONT To Circuit Breaker REAR V350 PRO LINCOLN 5 F 23 F 23 TROUBLESHOOTING amp REPAIR INPUT RECTIFIER TEST CONTINUED Table F 2 Input Rectifier Test Points TEST POINT TERMINALS ANALOG METER X10 RANGE PROBE PROBE Acceptable Meter Readings Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms A B C A B C A B C Less than 100 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms 9 If the input rectifier does not meet the 11 If the input rectifier is faulty see the acceptable readings outlined in Table F 2 Input Rectifier Bridge Removal amp the component may be faulty Replace Replacement procedure Note Before replacing the input rectifier 12 Replace the case wraparound cover check the input power switch and per form the Main Switch Board Test Als
35. 1 10 267 5 R41 518380 14 THERMISTOR PTC 5000HMS 28mA R42 R43 R44 R64 R65 25001 3320SMT RESISTOR SMD 3320HMS 1 4W 1206 1 TR R46 R47 525001 22105 5 5 6 2210 5 1 4 1206 1 R48 R49 525001 10005 RESISTOR SMD 1000HMS 1 4W 1206 176 TR R51 R52 525000 33215 RESISTOR SMD METAL FILM 1 10W 3 32K 1 R55 R56 R57 R126 R127 525000 68115 RESISTOR SMD METAL FILM 1 10W 6 81K 1 R62 R63 R128 R129 R130 R131 525000 68135 RESISTOR SMD METAL FILM 1 10W 681K 196 R66 R67 525000 90925 RESISTOR SMD METAL FILM 1 10W 90 9K 1 R68 R69 25000 2801SMT RESISTOR SMD METAL FILM 1 10W 2 80K 1 R70 R71 525000 12125 RESISTOR SMD METAL FILM 1 10W 12 1K 1 R8 R9 R10 R11 R12 R13 525000 20025 RESISTOR SMD METAL FILM 1 10W 20 0K 1 R82 R85 25001 6810SMT RESISTOR SMD 6810HMS 1 4W 1206 1 TR R86 525004 24305 RESISTOR SMD 1W 243OHMS 1 6 R91 R92 R93 R99 R107 517900 85 IC SMD CMOS INVERTER SCHMITT HEX HC14 x1 520496 15 IC SMD CMOS DRIVERDDISPLAY LED CC MCU X10 525068 55 IC SMD VOLTAGE CONVERTER SWITCHED CAP X11 515128 105 IC SMD VOLTAGE REF ADJ PECISION 4311 x12 815018 225 IC SMD ARRAY CLAMPING HEX SOIC 8 X14 15018 11SMT IC SMD CMOS SWITCH ANALOG QUA
36. 2 Perform the Main Switch 3 Perform the 4 Perform the Output Diode Module Test 5 The control board may be faulty 6 The input filter capacitors may be faulty Check and replace if necessary 7 The status panel board may be faulty The V350 Pro will not produce full output 1 The input voltage may be too low limiting the output capability of the machine Make certain the input voltage is correct for the machine and the reconnect switch and jumper lead configuration 2 The welding current may be too high The machine will fold back to 100 amps if the welding current exceeds 450 amps Make sure the machine is in Local output control If the problem is resolved the Remote control board or the external remote control unit may be faulty 1 Perform the Output Rectifier Test 2 Perform the Main Switch 3 Perform the 4 Perform the Current Transducer Test 5 If the preset function is not performing properly the status panel board or the output control may be faulty 6 The control board may be faulty CAUTION If for any reason you do not understand the test procedures or are unable to perform the test repairs safely con tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 5 6 6 TROUBLESHOOTING amp REPAIR Observe Safety Guidelines detailed
37. 3 Hidden Middle Control 3 Weld Mode 5 Anise stich e t p Oed eg op ree ones B 3 CCeStI CK SOT ie t B 3 CCeStick Crisp a eb Rd ere du n EL rs e o pr Re a e Pere d B 3 TG GTAW EE 4 CV WIIO ue ceti ed quse da a ela ge a ex B 4 CV FIUX Cored s ote ide ede ete vat tre on B rp e B 4 Hot Start amp Control B 4 Lower Case 4 CV M00 6S iie T RE Ur Ren eh eed WR eT B 4 TIG LIH 5 CC Stick Modes e pee i p aa B 5 Types of Remote Output nnne nnne B 5 Types of Remote Weld Terminal B 5 Design Features and emere eene nennen B 5 Auxillary POWel REDE CREE CERE CO ERR EGRE CHER EL DOR B 6 6 Recommended nnns 6 V350 PRO LINCOLN 5 di OPERATION cis OPERATING INSTRUCTIONS A WARNING ELECTRIC SHOCK can kill e Do not touch electrically 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 ventilation or exhaust to remove M GA fumes from b
38. 47 TO AGREE WITH PUBLISHED STANDARDS LOGIC TABLE BOARD 1 0 x0000010 INPUTS SS CS3 2 OUTPUTS X6 Pin 11 V350 PRO 6 14 BOARD ASSEMBLY DISPLAY ELECTRICAL DIAGRAMS EZ Ez O a CIS RI oD J 111132 2 CS7ID2 DSPS 0576 0597 m e D e NOTE GROUND SIDE ENCAPSULATE WITH HUMISEAL 1A27LU PER E1844 OR WITH EQUIVALENT AS APPROVED BY LINCOLN ELECTRIC COMPANY 2 COATS PART NO DESCRIPTION G 14 DESIGNATOR G3656 C DISPLAY PC BOARD BLANK L11166 1 FLEX CIRCUIT T15176 2 LED SPACER 0 140 HIGH E3539 ELEC INSUL COMPOUND 01 oz SPECIFICATIONS FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT 525020 35 ICAPACITOR SMD CERAMIC 0 1MF 50V 10 X 2 3 4 5 11 12 19 20 525020 95 ICAPACITOR SMD CERAMIC 47pF 50V 5 COG 13 14 15 16 17 18 525024 75 CAPACITOR SMD TANTALUM 47MF 20V 10 S c1 518248 10 ICONNECTOR MOLEX MINI PCB 10 PIN 137 520496 15 IC SMD CMOS DRIVER DISPLAY LED CC MCU 517900 285 IC SMD CMOS HEX INVERTING BUFFER 3 ST 517900 85 IC SMD CMOS INVERT
39. 524020 12 CONNECTOR MOLEX MINI PCB 12 PIN TIN J331 515000 255 OPTOCOUPLER SSR FORM 1A 1B 0 17A 8 PI 525050 15 TRANSISTOR 0 5 40 23 Q2 Q3 04 Q7 525050 25 TRANSISTOR SMS PNP SOT23 0 5A 40 Q6 525051 25 TRANSISTOR 2 18 200 1 Q8 25000 2431SMT RESISTOR SMD METAL FILM 1 10W 2 43K 1 R1 25000 2211SMT RESISTOR SMD METAL FILM 1 10W 2 21K 1 R113 R121 25000 3322SMT RESISTOR SMD METAL FILM 1 10W 33 2K 1 R115 525003 22115 RESISTOR SMD 1W 2 21K 126 R132 R133 R134 CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTANCE OHMS NOTES L11109 1A1 IDENTIFICATION CODE PART NO THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A RANCE F Chg Sheet No X INFO BTO MANUFACTURING TOLERANCE PER E2056 ON 2 PLACE DECIMALS IS 02 6 2 2000A XM5626 DESIGN INFORMATION REFERENCE EQUIPMENT TYPE ON 3 PLACE DECIMALS IS 002 ON ALL ANGLES IS 5 OF A DEGREE XC UF DO NOT INSERT THESE COMPONENTS N A ALL CONNECTORS MUST BE GREASED WITH ITEM 6 PRIOR TO ENCAPSULATION CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY SEE E2454 BEFORE H
40. 6 and 5 See Figure F 19 FIGURE F 19 CONTROL BOARD PLUG LOCATION V350 PRO LINCOLN 5 55 F 55 TROUBLESHOOTING amp REPAIR CONTROL BOARD REMOVAL AND REPLACEMENT continued 14 Using a 3 8 nut driver remove the four mounting 16 Replace the control board nuts from the four corners of the control board See Figure F 20 15 Remove the control board Note Gentle prying from behind the board using a flathead screw driver may be required FIGURE F 20 CONTROL BOARD MOUNTING SCREW LOCATION Mounting Screws V350 PRO LINCOLN 5 F 56 F 56 TROUBLESHOOTING amp REPAIR CONTROL BOARD REMOVAL AND REPLACEMENT continued 17 Replace the four 3 8 mounting nuts at the 21 Replace the six phillips head screws and their ners of the board washers from around the input power switch 18 Replace plugs 3 4 5 36 7 8 9 22 Using 5 16 nut driver replace the four screws 10B and 10A previously removed previously removed from the front of the machine 19 Using a 5 16 nut driver replace the metal plate 23 Replace the case wraparound cover on the top of the machine that holds the case front assembly to the center panel Replace all cable ties previously removed 20 Replace the four phillips head screws removed from the front of the machine located around the two welder output terminals V350 PRO
41. GATE lt BODY REGION DRAIN DRIFT REGION POSITIVE VOLTAGE Je APPLIED GATE SOURCE BODY REGION DRAIN DRIFT REGION lt surrentaver sd Pp PP dre ven auieCTIG taven DRAIN DRAIN A PASSIVE B ACTIVE V350 PRO LINCOLN 5 E 8 E 8 THEORY OF OPERATION FIGURE E 9 TYPICAL IGBT OUTPUTS 1 48 B lusec 50 u sec MINIMUM OUTPUT 24usec 2usec 24sec 50 u sec ta MAXIMUM OUTPUT PULSE WIDTH MODULATION The term Pulse Width Modulation is used to describe how much time is devoted to conduction in the posi tive and negative portions of the cycle Changing the pulse width is known as modulation Pulse Width Modulation PWM is the varying of the pulse width over the allowed range of a cycle to affect the output of the machine MINIMUM OUTPUT By controlling the duration of the gate signal the IGBT is turned on and off for different durations during the cycle The top drawing in Figure E 9 shows the mini mum output signal possible over a 50 microsecond time period The positive portion of the signal represents one IGBT group conducting for one microsecond The negative portion is the other IGBT group The dwell time off time is 48 microseconds both IGBT groups off Since only two microseconds of the 50 microsecond time period is devoted to conducting th
42. LINCOLN 5 57 57 TROUBLESHOOTING amp REPAIR DISPLAY BOARD REMOVAL AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call or 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the display board for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver Flathead Screwdriver Phillips Head Screwdriver This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 F 58 F 58 TROUBLESHOOTING amp REPAIR DISPLAY BOARD REMOVAL amp REPLACEMENT continued FIGURE F 21 DISPLAY BOARD LOCATION Display Board Status Board PROCEDURE 3 Perform the Input Filter Capacitor 1 Remove input power to the V350 PRO Discharge Procedure detailed earlier in this section 2 Using a 5 16 nut driver remove the case wraparound cover 4 Locate t
43. PART NO NOTES N A CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY SEE E2454 BEFORE HANDLING N B DO NOT COAT WITH ENCAPSULATION MATERIAL N C DO NOT INSERT THESE COMPONENTS N D INSERT ITEM 3 BETWEEN ROWS OF LED s ITEM 3 MUST BE FLUSH WITH LED BULB N E ALL CONNECTORS MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION N F LED 1 THRU LED 16 MUST ALWAYS BE MATCHED BY VENDOR AND VENDOR PART NUMBER DO NOT MIX DIFFERENT VENDORS OR VENDOR PART NUMBERS ON THE SAME BOARD ASSEMBLY ENCAPSULATE WITH HUMISEAL 1A27LU PER E1844 OR WITH EQUIVALENT AS APPROVED BY LINCOLN ELECTRIC COMPANY 2 COATS BUY PER E3867 TEST PER E3856 ST THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A Nm Emag Cho Sheet No um DESIGN INFORMATION REFERENCE EQUIPMENT TYPE MISCELLANEOUS N 3 PLACE DECIMALS IS 27002 1 ON ALL ANGLES IS 5 5 OF A DEGREE XD SPI STATUS INPUT P C BOARD AS BLY DATE 9 30 99 DRAWINGNo L 11107 2 DRAWN BY F V ENGINEER ITH PUBLISHED STANDARDS DO NOT SCALE THIS DRAWING SCALE NONE APPROVED NOTE Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your f
44. Snubber Board Replacement 39 From the rear of the machine replace the heavy 40 flex lead to the bottom of the output diode heatsink assembly using a 1 2 wrench Note Don t forget to include washers 41 The rear of the machine may now be placed back into its original position V350 PRO Using a 3 8 wrench replace leads 202 203 206 and 207A previously removed from the reconnect switches Tighten the metal nut previously removed from the inside of the rear wall on the back of the machine Channel locks may be necessary Replace the large plastic nut from around input power line located at the back of the machine Replace the seven leads to the reconnect panel in their proper locations Replace the two leads to the CB2 circuit breaker Replace the four leads to the two wire feeder cir cuit breakers Using a 5 16 nut driver replace the four screws at the top and bottom at the rear of the machine Replace the two phillips head mounting screws from around each wire feeder receptacle Replace the case wraparound cover LINCOLN 5 94 94 TROUBLESHOOTING AND REPAIR RETEST AFTER REPAIR Retest a machine If it is rejected under test for any reason that requires you to remove any part which could affect the machine s electrical characteristics If you repair or replace any electrical components IDLE AMPS Input Volts Maximum Idle Amps Idle Watts 230VAC Less Than 1 0 Amp 400 Watts 460V
45. TITTTTTTTI TT TTTTTTTTTT 4 0 TDX 50 2 oazo 555209059056 437 lt MISO 252833 BES 99 25650 909 gg ok 926500998056 SHZooos Pe T T TT ese 2650 She 229 S007 EE 92 23 g ag lt 438 lt 76A 3 98 3 Sg 8s 2 5 3 s 2 22 39 MOSI gt sO Ns U RPPORRRpPORS 28 leesnek 781 8588 8 8 340 GROUND SPI 482 9 884985 9 2 g E s 28 255 CV FLUX CORE LOCALI REMOTE REMOTE NOTES 8 22259 IL Mor TERMINALS AMPS VOLTS PC BOARD COMPONENTS SHOWN FOR REFERENCE e ON OFF AMPHENOLS VIEWED FROM FRONT OUTSIDE OF MACHINE 554 48 a HOT ARC ON ALL COMPONENTS ARE SHOWN ZEE gt MODESELECT START CONTROL STATUSPANEL OO DISPLAY PANEL GAS SOLENOID MODE SELECT PANEL option ELECTRICAL SYMBOLS PER E1537 i REMOTE BOARD 553 graphical representation of potentiometer connection NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual J1 J6 J7 P52 431 133 1 794437 5 05999 o o ooo 6 10 J2 45 J11 J9 J42 P53 1 3 426 J8 J20 J21 1 4 CONNECTOR CAVITY NUMBERING SEQUENCE VIEWED FROM
46. optional gas solenoid An over or under input voltage detection and shutdown circuit is also part of the power board s circuitry CONTROL BOARD The control board performs the primary interfacing Optional Solenoid functions to establish and maintain output control of the V350 machine The control board sends and receives command signals from the mode panel the status panel the display panel and or the optional remote panel These communications are processed through a digital network called a Serial Peripheral Interface SPI This network digitally communicates to and from the control board the user s commands and various machine status messages The software that is contained within the control board processes and compares these commands with the voltage and cur rent feedback information it receives from the output current sensor and the output voltage sensing leads The appropriate pulse width modulation PWM signals See Pulse Width Modulationlin this section are sent to the switch board IGBTs In this manner the digital ly controlled high speed welding waveform is created and regulated The control board also monitors the thermostats the main transformer primary currents and the input capacitor voltages NOTE Unshaded areas of Block Logic Diagram are the subject of discussion V350 PRO LINCOLN 5 5 THEORY OF OPERATION FIGURE E 5 OUTPUT RECTIFIER AND CHOKE Main Switch Board
47. welding head nozzle or semiautomatic welding gun are also electrically hot Always be sure the work cable makes a good electrical connection with the metal being welded The connection should be as close as possible to the area being welded Ground the work or metal to be welded to a good electrical earth ground Maintain the electrode holder work clamp welding cable and welding machine in good safe operating condition Replace damaged insulation Never dip the electrode in water for cooling Never simultaneously touch electrically hot parts of electrode holders connected to two welders because voltage between the two can be the total of the open circuit voltage of both welders When working above floor level use a safety belt to protect yourself from a fall should you get a shock Also see Items 6 c and 8 LINCOLN 8 Also see item 1 b ARC RAYS can burn 4 a Use a shield with the proper filter and cover 2 plates to protect your eyes sparks and the rays of the arc when welding or observing open arc welding Headshield and filter lens should conform to ANSI 787 standards 4 b Use suitable clothing made from durable flame resistant material to protect your skin and that of your helpers from the arc rays Protect other nearby personnel with suitable non flammable screening and or warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or metal
48. 1 2W HV 67 R75 4 MC33074AD ISV 41 5V45VA SEL ON lout Vin 0 99mA 1 00K R68 CURRENT LIMIT URRENT NODE CONTROL DISABLE FETS AS SOON AS PRIMARY CURRENT IB GREATER THAN A REFERENCE LEVE R113 VA 1 50K R691 00K VN R1276 81K T15V MC33074AD 1 2W HV GQURRENT FEEDBAC INTEGRATOR 99d 66 R122 Y 3 R209 4 75K 1 2W_HV 21 9024 210 Q9 9 3 3 Q9 9 1 2W HV 3500 VOLTS ON CONNECTOR IDEAL VOLTAGE 2 6 202 6 70V 0 9V NN 475 C5 gt ALS A LEZSZSINI LEZSZSINI AVS LINCOLN B VS MeV LEZSZSINI AVS 525 5 NO NS NAP 1 50K 3 OLniveori R112 1 00 221 820pF C19 CONVERSION R53 47 5K R54 1 00K 5V 1g 21098 X6 CLK VDD RS AGND1 CS AGND2 SHDNGND3 1 SDI 4 SDO DGND AD8403ARU10 x32 16 CLK VDD 21 RS AGND1 1 CS AGND2 SHDXXGND3 KFA J8 5 Va Va OVR CUR 528 f LT1016 M c21 0
49. 1 8W TR NP R37 R38 R35 R203 RB R39 525001 47855 SRES 47 5 1206 196 1 8W TRNP R3R2 25001 4753SMT_ SRES 475K 1206 1 1 8W TR NP 525001 10035 SRES 100K 1206 1 6 1 8W 200PPM R100 R55 R111 R49 R108 R115 R124 R142 R208 R207 R106 525001 12135MT SRES 121K 1206 MF 1 6 AW RIO 525001 33225 SRES 33 2K 1206 1 1 8W TR NP R63 R65 R233 25001 1000SMT_ SRES 100 1206 1 1 8W TRNP R62 R44 R52 R30 25001 2210SMT SRES 221 1206 1 1 8W NP_ R59 R48 R102 R197 R45 25001 2671SMT SRES 2 67K 1206 1 1 8W TR NP R109 25001 1502SMT_ SRES 150K 1206 196 1 8W NP R117 R125 S25001 6811SMT SRES 6 81K 1206 1 1 8W NP R127 R130 25001 1500SMT_ hs Is ro len e feo SRES 150 1206 1 1 8W TR NP R196 R198 525006 1080 SRES 10 R151 154 157 R160 R148 R161 R158 R155 R152 R149 525050 25 STRA2N4403 S023 TR 500475 N 017 Q16 015 013 014 525051 65 STRAJRLR120N 10A 10V MOSFET Q9 Q10 525050 15 STRAMMBTAA01LT NPN SOT 23 1012 04 Q7 Q5 Q6 Q1 018 019 020 525051 45 STRA2N7002 RNP 03 02 525051 75 SICS IRF7103 NP Qi 524020 4 CONAP TIN MININP 4511 42 5240205 CON 6P TIN MINI NP J9 524020 2 CON 2P TIN MINI NP J10A J108 518248 10 CON 10P MINLNP J3 518248 16 CON 16P MINLNP
50. 4 Setthe voltmeter switch to the electrode polarity chosen 5 Set CONTROL SELECT to REMOTE 10 11 Set the MODE to the CV WIRE position Set WELD TERMINALS SELECT to the REMOTE position Set the ARC CONTROL to the O position and then adjust to suit Connect the K432 remote control cable to the LN 25 Connect the K876 adapter to the K432 and to the 24 42VAC 14 pin amphenol located at the rear of the V350 PRO Adjust the wire feed speed and voltage at the LN 25 NOTE See Figure C 4 for connection Using K867 adapter Figure C 3 LN 25 with K431 Remote Option to the V350 PRO ELECTRODE CABLE TO LN 25 TO WORK AMPHENOL 14 PIN 24 42VAC INVERTEC POWER SOURCE LN 25 WITH 6 AMPHENOL OPTION 4 i ADAPTER K432 REMOTE CONTROL CABLE NOTE Illustration shows electrode connected for positive polarity V350 PRO LINCOLN 5 5 ACCESSORIES CONNECTION OF THE K867 ADAPTER FOR USE WITH LN 25 WITH K431 OPTION V350 PRO 1 Insulate each unused lead individually 2 Remove 6 pin plug from K432 cable in order to connect K867 adapter 3 Label each lead A thru F as they are removed from the 6 pin plug 4 Splice leads and insulate Figure C 4 Connection of LN 25 to V350 PRO using K867 adapter ELECTRODE CABLE TO LN 25 TO 14 PIN WORK 24 42VAC 2 AMPHENOL O SPARE o D 75 0o
51. ALLOF THE COMPONENTS LEADS ARE COVERED TIGHTEN TO 6 8 in 16 WITHOUT APPLYING ANY PRESSURE TO PLASTIC CASE OF ITEM 51 PLACE A HEAVY FILM OF ITEM 74 ON HEATSINK SURFACE DO NOT GET ON THREADS PLACE BARCODED ASSEMBLY NUMBER IDENTIFICATION AND BARCODED SERIAL NUMBER IDENTIFICATION IN AREA SHOWN OESS ORERE PEET SS MANUFACTURING TOLERANCE PER E2056 02 G3632 D DESCRIPTION POWER PC BOARD BLANK G 10 REFERENCE DESIGNATOR M19436 3 POTTING TRAY 58025 80 SELF TAPPING SCREW E2527 115 4 1 oz IEPOXY ENCAPSULATIOG RESIN E2861 5 REQ D ELECTRICAL INSULATING COMPOUND PART NUMBER SPECIFICATIONS DESCRIPTION FOR ITEMS LISTED BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT REFERENCE N A PCB MTP DC POWER ASSY NP N A 25001 1821 ISRES 1 82K 1206 1 1 8W NP R14 R20 525001 56215 ISRES 5 62K 1206 1 1 8W TR NP R12 R28 R45 525001 10025 5 5 10 1206 1 1 4 09 007 R4 R13 R22 R2 R27 R56 525001 56225 ISRES 56 2K 1206 1 1 8W NP 500 R38 R39 525001 10035 ISRES 100K TKF 1206 1 1 8W TR 5 R10 R29 525001 33205 5 5 330 1206 5 1 4 R41 R53 525001 24905 5 5 249 1206 1 1 4 R33 25001 2213 ISRES 221K 1206 1 1 8W TR NP_ R34 R52 25005 1SMT SRES 0 05 1 2W TR NP_ R11 R30
52. NOT SPIN AFTER CLINCHING N F SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET AND ALL AROUND EYELET ON COPPER SIDE ONLY NO ICICLES OR SOLDER BLOBS PERMITTED N G AFTER SOLDERING INSPECT POWER TERMINAL CONNECTIONS TO ENSURE SOLDER HAS PROPERLY WET COMPONENT SIDE PAD ON A MINIMUM OF 3 OF THE 4 LEGS OF THE POWER TERMINAL N H BAR MUST BE FREE OF ENCAPSULATION MATERIAL ON BOTH SURFACES AROUND MOUNTING HOLES AND ENTIRE LENGTH OF MOUNTING SURFACE ENCAPSULATION MATERIAL MUST NOT EXTEND BEYOND THE MOUNTING SURFACE PLANE 2 PLACES N J DO NOT COAT WITH ENCAPSULATION MATERIAL TOP AND BOTTOM 80 05 DIA N K PC BOARD HOLES TO BE FREE OF ENCAPSULATION MATERIAL AND SEALANT FOR A DIAMETER OF 50 FOR THE LARGER HOLES AND 25 FOR THE SMALLER HOLES BOTH SIDES OF BOARD 4 PLACES N L THIS AREA TO BE COVERED ON COMPONENT SIDE OF BOARD WITH SEALANT PRIOR TO ENCAPSULATION MATERIAL MUST BE APPLIED FROM TOP TO COMPLETELY FILL TO UNDERSIDE OF DEVICE THEN APPLY SEALANT AROUND BASE OF DEVICE THIS AREA TO BE COVERED ON OPPOSITE COMPONENT SIDE OF BOARD WITH ITEM 8 PRIOR TO ENCAPSULATION DO NOT COAT WITH ENCAPSULATION MATERIAL ON THE TOP SURFACES NOR THE THREADS N N THESE SURFACES MUST BE MAINTAINEDCO PLANAR WITHIN 010 THROUGH ENTIRE SOLDERING AND SEALING PROCESS SEALANT HEIGHT BETWEEN MODULES NOT TO EXCEED 17 MAX NA NA X INFO G 12
53. PFO MODCLK 51 ADDR11 52 ADDR12 RESET SYS 101 OV NORMA NOISESOND Vb 4 A PWRDN INT 100 5V FAULT 5 GNDV FAULT INT 99 224K 56 ADDRIS 57 IRQ amp ggas EPGA INT PFJ 60 16 63 ADDR folse_GND INT CAN PFA IRQ4 CAPAOV 1 00k R136 CAPA_OV FPGA BAD IRQS 100 95 lt 82 CAPAUV ANA CAPA UV IRLR120N FAULT TPUCHO 9 SIGNAL TPUCH1 PC3CS6 A19 A19 7 DSP RESETS TOOR 910 RED TPUCH2 20 CTRL gt 4 X27 ADDRi 44 7 Jsa 070 c71 LED7 TPUCH3 pee so 22 9 TACK gt 3 ADDR VCC1 ALS ALS 0665815 TPUCHA 2 LIU CAN cS 3 Sat 2 5 TPUCHs CS10 A23 3 ADDR3 LEZGZSWW 820pF LeZSZSWW dopr 4 R183 TPUCHG PCOCS3 FCO paca 9 TPUCH7 PC1CS4 RDDR amp 5 7 TPUGHS PERS FC2 2 UNCEN qr ADDR TPUCH9 139 DATAO ADDRB 21 eno Vb TEUCHID 138 DATAT CADDRS 3 TPUCH12 137 DATAZ ADDRIO 9 TPUCHIS 136 DATA3 AADDR i 18 7 V j 133 DATAA ADDRI2 5 22 1K vlowbe NOISE GND L2 DATAS N ADDRIS 5 R203 130 DATA ADDR15 2 CAPBOV CAPB OV CLK 43 PQSOMISO 157 DATARS Ad POSTMOSI DATAE RDDRTE i b2 1K 7 PQSZSCK ADDRI 22 CMP4 s 5 50 SS 24 DATATO 2 DATA i 122 DATATI
54. REPAIR INPUT RECTIFIER TEST WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if the input rectifier has shorted or open diodes MATERIALS NEEDED Analog Voltmeter Ohmmeter M ultimeter 5 16 Nut Driver Phillips Head Screwdriver Wiring Diagram This procedure takes approximately 25 minutes to perform V350 PRO LINCOLN 5 F 22 1 3 To Auxiliary Transformer TROUBLESHOOTING amp REPAIR INPUT RECTIFIER TEST CONTINUED TEST PROCEDURE Remove input power to the V350 PRO machine Using a 5 16 nut driver remove the case wraparound cover Perform the Capacitor Discharge Procedure detailed earlier in this section Locate the input rectifier and associated leads See Figure F 3 Carefully remove the silicone sealant from leads 207 207A and 209 6 Using a phillips head screwdriver
55. T UJ n Je gt gt gt gt gt gt gt gt gt gt OWN DUH um N HC368A un ms Dout EOC Vref Vag MC145051 gt r 1 C2 rx 3 01 20V 50V 7 24 5 HC368A MC145051 GND Vss i 2 BEY GSPI LINCOLN B NOTES SINCE COMPONENTS OR CIRCUITRY ON PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING COMMON CODE NUMBER THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY UNLESS OTHERWISE SPECIFIED TOLERANCE ON HOLES SIZES PER 2056 ON 2 PLACE DECIMALS 15 02 ON 3 PLACE DECIMALS IS 002 ON ALL ANGLES IS 5 OF A DEGREE THE LINCOLN ELECTRIC CO 15 NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF THE LINCOLN ELECTRIC CO MATERIAL TOLERANCE t TO AGREE WITH PUBLISHED STANDARDS 1 CLOCK DATA_OUT ENABLE DATA_IN yc Rx MC14489 E a BAN BAN BAN BAN BAN LEDS LED1 LEDZ LED3 lt N pme EX 8 72 Iv 5 lele h ET mm O gt
56. TEST continued TEST PROCEDURE 1 Remove the input power to the V350 PRO 3 Performthe InputFilter Capacitor Discharge machine 2 Using the 5 16 nut driver remove the case 4 Locate plug J 22 on the main switch board Do wraparound cover not remove the plug from the board See Figure F 12 FIGURE F 12 PLUG J 22 LOCATION 5 Carefully apply the correct input power to the 6 Carefully check for 115VAC at plug J 22 pin 2 machine to J22 pin 3 leads 115B to COM 2 See Figure F 13 WARNING HIGH VOLTAGE IS PRESENT AT THE MAIN SWITCH BOARD FIGURE F 13 PLUG J 22 Fan Lead Lead 115 B Lead Com 2 Fan Lead Plug J22 V350 PRO LINCOLN 5 43 43 TROUBLESHOOTING AND REPAIR FAN CONTROL AND MOTOR TEST continued 7 If the 115VAC is low or not present perform 2 Energize the weld output terminals Select Also check Weld Terminals ON and carefully check for plug J 22 and associated leads for loose or 15VAC at plug J 20 pin 6 to J 20 pin 2 leads faulty connections See the Wiring Diagram 715 to 716 See Figure F 14 If the 15VAC is present and the fan is not running then the switch board may be faulty If the 15VDC is not present when the weld terminals are ener gized then the control board may be faulty Also check plugs 20 7 and all associated leads for loose or faulty connections See the Wiring Diagram 8 Energize the wel
57. TONTROLLED X2 Y LEFT LED PAIR INDICATES THE CONTROL MODE RED LOCAL GREEN REMOTE 35V CLOCK Rx GSP MC14489 16 19 n R25 a vag PP ls pi m 9 MC145051 51 R24 TOOK Cc gt HC368A Vcc x5 01 01 x3 X7 E 145051 HC368A GENERAL INFORMATION LAST NO USED Vss GND R 27 LED 16 E Jk i ELECTRICAL SYMBOLS PER E1537 e CAPACITORS MFD UNLESS OTHERWISE SPECIFIED C 27 7 RESISTORS Ohms UNLESS OTHERWISE SPECIFIED LABELS 0 5 2 NOTES DIODES UNLESS OTHERWISE SPECIFIED SUPPLY VOLTAGE NET SINCE COMPONENTS OR CIRCUITRY ON PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY OF COMPLETE BOARD THIS DIAGRAM MAY POWER SUPPLY SOURCE POINT NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING COMMON CODE COMMON CONNECTION NUMBER FILENAME 19338 2BA 1 1 FRAME CONNECTIO THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC EARTH GROUND CONNECTION 15 NOT BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF THE LINCOLN ELECTRIC CO UNLESS OTHERWISE SPECIFIED TOLERAN
58. Transformer Output Voltage Sense leubls 1991 Machine Control Supply 15VDC 15VDC 6VDC Control Board RS232 Supply 5VDC SPI Communications amp 15VDC 5VDC Supply Y Y Y Y Solenoid Supply 40VDC gt Remote Mode Status Display Board Panel Panel Panel Remote Control amp Trigger 6 Pin Amphenol Optional Solenoid V350 PRO LINCOLN 5 2 THEORY OF OPERATION FIGURE E 2 INPUT VOLTAGE AND PRECHARGE Main Switch Board To Control Board Positive Output Terminal Negative Output Terminal Input Relay Control 7 9 Input switch Input amp 100A Breaker Rectifier lt gt T Reconnect 4 gt Switch Ls gt es 115VAC Fan Supply 5 Auxiliary E 115VAC 42VAC Transformer B Capa Power Board 40VDC 28VAC Solenoid Supply 40VDC Soft Start Control Machine Control Supply 15VDC 15VDC 6VDC SPI Supply 15VDC 5VDC RS232 Supply 5VDC Output Voltage Sense citor Feedback 2 jeubis 1891 Control Board SPI Communications amp 15VDC 5VDC Supply Status Panel Remote Board Display Panel Mode Panel Remote Control amp Trigger GENERAL DESCRIPTION The Invertec V35
59. a time until you locate the cause of your problem All of the referenced test procedures referred to in the Troubleshooting Guide are described in detail at the end of this chapter Refer to the Troubleshooting and Repair Table of Contents to locate each specific Test Procedure All of the referred to test points components terminal strips etc can be found on the referenced electrical wiring diagrams and schematics Refer to the Electrical Diagrams Section Table of Contents to locate the appropriate diagram CAUTION 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 5 F 3 F 3 TROUBLESHOOTING amp REPAIR PC BOARD TROUBLESHOOTING PROCEDURES WARNING ELECTRIC SHOCK can kill Have an electrician install and service this equipment Turn the machine OFF before working on equipment Do not touch electrically hot parts Sometimes machine failures appear to be due to PC board failures These problems can sometimes be traced to poor electrical connections To avoid prob lems when troubleshooting and replacing PC boards please use the following procedure l Determine to the best of your technical ability that the PC board is the most likely component caus ing the failure symptom 2 Check for
60. actual output current reading on the test ammeter is 300amps 2 9 Wait for the machines output to be automatically turned off and then back on V350 PRO Adjust the Output Control knob again if necessary to make the actual output cur rent reading on the test ammeter 300 amps 2A Wait for the machines output to be auto matically turned off and then back on Repeat the above two steps if necessary Press and release the Mode Select button to save the calibration The left display will scroll the message IcAL SAVEd The machine will reset to normal operation NOTE If the Mode Select button is not pressed within 30 seconds after adjusting the Output Control knob the machine will leave the calibration mode and use the pre vious Calibration settings LINCOLN 5 F 49 50 50 NOTES V350 PRO LINCOLN 5 51 51 TROUBLESHOOTING amp REPAIR CONTROL BOARD REMOVAL AND REPLACEMENT WARNING 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 electrical 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 Servi
61. be changed by pushing the OUTPUT CON TROL or WELD TERMINAL button A user cannot select between the 6 and 14 pin amphenols CV modes The remote will default to the 14 pin amphenol remote if a remote is connected to either of the 14 pin amphenols and the 6 pin amphenol Note Only one of the 14 pin amphenols can have a remote control connected at a time If no remote is connected to either of the 14 pin amphenols then the remote will default to the 6 pin amphenol if a remote is connected to it remote control is connected to any of the amphenols the WELD TERMINAL control will default to REMOTE If there are not any remote control devices attached the WELD TERMINAL control will default to ON V350 PRO LINCOLN 5 5 OPERATION TIG mode Types of Remote WELD TERMINAL Control The remote will default to the 6 pin amphenol if a remote control is connected to the 6 pin amphenol and one of the 14 pin amphenols If a remote is not connected to the 6 pin amphenol then the remote will default to the 14 pin amphenols if a remote is connected to one of the 14 pin amphe nols If a remote control is connected to any of the amphenols the WELD TERMINAL control will default to REMOTE If there are not any remote control devices attached the WELD TERMINAL control will default to ON CC Stick modes The remote will default to only the 6 pin amphenol if a remote is connected to it The WELD TERMINAL control will def
62. be on your right side 2 4 4 Connect the work cable to the workpiece as close as possible to the area being welded 1 0 To prevent accidentally starting gasoline engines while turning the engine or welding generator during maintenance work disconnect the spark plug wires distributor cap or magneto wire as appropriate 2 d 5 Do not work next to welding power source Mar 95 LINCOLN 8 SAFETY ELECTRIC SHOCK can kill 3 a The electrode and work or ground circuits are electrically hot when the welder is on Do not touch these hot parts with your bare skin or wet clothing Wear dry hole free gloves to insulate hands 3 b Insulate yourself from work and ground using dry insulation Make certain the insulation is large enough to cover your full area of physical contact with work and ground In addition to the normal safety precautions if welding must be performed under electrically hazardous conditions in damp locations or while wearing wet clothing on metal structures such as floors gratings or scaffolds when in cramped positions such as sitting kneeling or lying if there is a high risk of unavoidable or accidental contact with the workpiece or ground use the following equipment Semiautomatic DC Constant Voltage Wire Welder DC Manual Stick Welder AC Welder with Reduced Voltage Control In semiautomatic or automatic wire welding the electrode electrode reel
63. by electrode Connect the work lead to the other terminal 4 Set the meter polarity switch on the front of the Invertec to coincide with wire feeder polarity used 5 Ifa remote control such as K857 is to be used with the Cobramatic the remote can be connected directly to the 6pin amphenol on the front of the Invertec or use a K864 adapter to connect the cobramatic and the remote to the 24 42VAC 14 pin wire feeder amphenol connector on the rear of the Invertec TIG Module K930 2 The TIG Module connects to the V350 Pro Factory or CE versions with a K936 1 9 14 pin control cable Connect the K936 1 to the 115VAC Wire Feeder Amphenol on the rear of the V350 Pro The TIG Module can also be used with the V350 Construction version A K936 4 control cable is required to supply 115VAC to the TIG Module from an external 115VAC supply General Instructions for Connection of Wire Feeders to V350 Pro Wire feeders other than LN 7 and LN 25 may be used provided that the auxiliary power supply capacity of the V350 Pro is not exceeded K867 universal adapter plug is required See connection diagram 19406 and 19386 at the back of this manual for more information Remote Control of Invertec Remote Control K857 Hand Amptrol K963 and Foot Amptrol K870 OPTIONS ACCESSORIES Construction Version K1728 2 All welding modes for this model run with local out put control and weld terminals ON e g Stick TIG LN25 off the arc
64. driver remove the case wraparound cover Perform the Capacitor Discharge Procedure detailed earlier in this section Locate the power board and plugs J 41 J 42 43 Do not remove plugs from the power board See Figure F 4 Carefully apply the correct input voltage to the V350 PRO Carefully test for the correct voltages at the power board See Table F 3 7 If the 40VDC is low or not present at plug J 41 check the rectifier bridge and C5 filter capacitor See Wiring Diagram Also per form the Auxiliary Transformer Test If any of the DC voltages are low or not present at plugs 42 or J 43 the power board may be faulty Remove the input power to the V350 PRO Replace the case wraparound cover using a 5 16 nut driver Figure F 4 Power Board Plug Location D J42 V350 PRO LINCOLN 5 J41 443 F 27 CHECK POINT LOCATION POWER PC BOARD CONNECTOR PLUG J41 POWER PC BOARD CONNECTOR PLUG J42 POWER PC BOARD CONNECTOR PLUG J42 POWER PC BOARD CONNECTOR PLUG J42 POWER PC BOARD CONNECTOR PLUG J43 POWER PC BOARD CONNECTOR PLUG J43 POWER PC BOARD CONNECTOR PLUG J43 POWER PC BOARD CONNECTOR PLUG J43 F 27 TROUBLESHOOTING amp REPAIR POWER BOARD TEST CONTINUED Table F 3 Power Board Voltage Checks TEST DESCRIPTION CHECK 40VDC SUPPLY FROM RECT BRIDGE TO POWER BD
65. in the beginning of this manual PROBLEMS SYMPTOMS The machine regularly overheats and the yellow thermal light is ON indicating a thermal overload POSSIBLE AREAS OF MISADJ USTMENT S FUNCTION PROBLEMS 1 The welding application may be exceeding the recommended duty cycle of the V350 Pro Dirt and dust may have clogged the cooling channels inside the machine Air intake and exhaust louvers may be blocked due to inade quate clearance around the machine Make certain the fan as needed F A N is operating properly The fan should operate when welding voltage is present and or when there is an over temperature condition TROUBLESHOOTING GUIDE RECOMMENDED COURSE OF ACTION 1 The 115VAC fan motor is controlled by the control board via the main switch board Perform the Fan Motor And 1 A thermostat or associated circuitry may be faulty See the wiring diagram One normally closed thermostat is located on the output choke and the other is located on the main switch board heat sink See the wiring diagram Note Removal Procedure will be required to gain access to the heat sink thermostat An attached wire feeder will not function correctly Make certain the wire feeder control cable is connected to the correct 14 pin amphenol type plug 115VAC or 24 42VAC for the wire feeder being used See the connection diagram Check the two circuit breakers located at the rear of th
66. loose connections at the PC board to assure that the PC board is properly connected 3 If the problem persists replace the suspect PC board using standard practices to avoid static electrical damage and electrical shock Read the warning inside the static resistant bag and perform the following procedures PC Board can be damaged by static electricity Remove your body s static charge before opening the static shielding bag Wear an anti sta tic wrist strap For safety use a Aa ATTENTION D Static Sensitive 1 Meg ohm resistive cord con Devices nected to a grounded part of the Handle only at equipment frame f you don t have a wrist strap Workstations touch unpainted grounded part of the equipment frame Reusable Keep touching the frame to Container prevent static build up Be sure not to touch any electrically live parts at the same time Do Not Destroy Tools which come in contact with the PC Board must be either conductive anti static or static dissipative 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 could have a static charge If the PC Board can t be installed immediately put it back in the static shielding bag f the PC Board uses protective shorting jumpers don t remove them until installation is complete you return a PC Board to
67. peo DAIEI2 15 99 DRAWINGNo 3789 100 3 E V350 PRO G 7 SCHEMATIC CONTROL PC BOARD 4 ELECTRICAL DIAGRAMS DATA10 ADDR4 DSP CLK MISO7 SPI LATCH AD SORRI aalan DSP D5 DSP D6 7 DSP REN DSP A1 i amp RRRA DSP A0 DSP D8 NL DSP D9 DSP 014 DSP 010 DSP 013 DSP D12 DSP D11 AD DATA11 AD DATA10 AD DATA9 AD DATA8 AD DATAG AD DATAS AD DATA4 AD DATA3 R104 172 BD ID 03 AD DATA13 D DATA12 DSP A13 24 DSP A14 23 DSP 15 6 TPUS 112 IPUS A 108 CLK 8 107 TPUO 106 FPGA RESET GND1 BONES br Vb 6 5 5 MOSIB AT25128 THERMAL LED 1 SPIMOSI MSELEN FPGA DONE 04 TURN OFF N 3 lt lt 0 1uF C138 0 1uF C139 0 1uF C114 0 1uF C84 DSP DO 9 DSP D1 19 11 DSP D3 12 DSP D4 15 DSP D5 16 DSP D6 17
68. polarity required by the electrode Connect the work lead to the other terminal 4 Set the meter polarity switch on the front of the V350 PRO to coincide with wire feeder polarity used 5 Set CONTROL SELECT to REMOTE 6 Set the MODE to the CV WIRE position 7 Set the WELD TERMINALS SELECT to the REMOTE position 8 Set the ARC CONTROL to the 0 position and then adjust to suit 9 Set wire feed speed and voltage at the LN 10 NOTE The voltage set point displayed on the V350 PRO should be ignored when operating in the remote control mode with the LN 10 10 See the LN 10 manual for details on accessing the control DIP switch 11 The control DIP switch inside the LN 10 should be set as shown below for operation with the V350 Pro Power Sources ON 1 2 3 4 5 6 7 8 51 C Figure C 8 LN 10 V350 PRO 14 PIN AMPHENOL 24 42VAC AT REAR OF MACHINE TO LN 10 K1505 TO WORK ELECTRODE CABLE TO LN 10 V350 PRO LINCOLN 5 ACCESSORIES Cobramatic Connection Instructions A Cobramatic can only be used with a Factory or CE version of the V350 1 Turn the Invertec power switch off 2 Connect the control cable from the Cobramatic to the 24 42 VAC 14 pin wire feeder amphenol on the rear of the Invertec 3 Connect the electrode cable to the output terminal of the polarity required
69. previously 6 Remove the four bolts using a 7 16 socket Two removed Torque bolt to 30 40 Inch Lbs of these bolts have leads 30 and 10 connected to them Note the position of all leads and associ 10 Replace the case wraparound cover ated washers upon removal 7 Carefully remove the snubber board FIGURE F 33 SNUBBER BOARD LEADS CLOSE UP 7 Lead 30 Lead B1 LC Lead 10 V350 PRO LINCOLN 5 F 77 F 77 TROUBLESHOOTING amp REPAIR POWER BOARD REMOVAL AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the power board for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver Flathead Screwdriver This procedure takes approximately 20 minutes to perform V350 PRO LINCOLN 5 78 F 78
70. since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician Improper PC board repairs could result in damage to the machine ro 9 NJ ELECTRICAL DIAGRAMS OOOOOOOO Loo OOOOOO L LI Ei jn 973 195 i 1079 cl i n E OOOOOOOO OO 111088 1 1
71. tem peratures may be caused by a lack of cooling air or operating the machine beyond its duty cycle or output rating If excessive operating temperatures should occur the thermostats will prevent output from the machine The yellow thermal light located on the front of the machine will be illuminated The thermostats are self resetting once the machine cools sufficiently If the thermostat shutdown was caused by excessive output or duty cycle and the fan is operating normally the power switch may be left on and the reset should occur within a 15 minute period If the fan is not turn ing or the air intake louvers are obstructed then the power must be removed from the machine and the fan problem or air obstruction corrected PROTECTIVE CIRCUITS Protective circuits are designed into the V350 PRO to sense trouble and shut down the machine before damage occurs to the machine s internal components OVER CURRENT PROTECTION If the average current exceeds 450 amps for one sec ond then the output will be limited to 100 amps until the load is removed If the peak current exceeds 600 amps for 150 ms the output will be limited to 100 amps until the load is removed UNDER OVER VOLTAGE PROTECTION Protective circuits are included on the switch and con trol boards to monitor the voltage across the input capacitors In the event that a capacitor pair voltage is too high or too low the machine output will be dis abled The protection ci
72. the four leads connected to the two wire feeder circuit breakers Pliers may be necessary Label and remove the two leads connecting to the CB2 circuit breaker Pliers may be necessary Label and remove the seven leads from the reconnect panel Pliers may be necessary Using a crescent wrench remove the large plastic nut from around the input power line located at bottom of the rear assembly See Figure F 41 11 12 13 Locate the steel nut located directly on the other side of the rear assembly behind the plastic nut that was previously removed See Figure F 41 Using a hammer and a flathead screwdriver firm ly tap the metal nut from the bottom of one of its ribs This tapping will loosen the nut Note Be sure to tap from the bottom so the nut loosens in a counter clockwise fashion if viewed from the front of the machine Using 3 8 wrench label and remove leads 202 203 206 207 from the reconnect switches See Figure F 41 FIGURE F 41 LEAD LOCATIONS V350 PRO LINCOLN 5 92 14 15 16 17 18 92 TROUBLESHOOTING amp REPAIR CURRENT TRANSDUCER REMOVAL AND REPLACEMENT continued The back of the machine may now gently be pulled away to gain access to the current trans ducer Note The rear of the machine cannot be removed completely Carefully swing the rear of the machine open to the right while fa
73. until the dis play reads vol cAL Release the Mode Select button Adjust the output control knob until the actual output voltage reading on the test volt meter is 20volts 5 volts Wait for the machine s output to be automati cally turned off and then back on Adjust the Output Control knob again if neces sary to make the actual voltage output 20 volts 5 volts Wait for the machine s output to be automati cally turned off and then back on Repeat the above two steps if necessary Press and release the Mode Select button to save the calibration NOTE If the Mode Select button is not pressed within 30 seconds after adjusting the Output Control knob the machine will leave the calibration mode and use the previous calibra tion settings LINCOLN 5 49 TROUBLESHOOTING AND REPAIR VOLTAGE AND CURRENT CALIBRATION PROCEDURE continued CURRENT CALIBRATION PROCEDURE 1 Connect the resistive load band approxi 10 mately 087 ohms and test ammeter to the welding output terminals 2 Press and hold in the Mode Select button 3 Turn on the V350 PRO 11 4 Rotate the Output Control knob until the 12 display reads cAL 5 Release the Mode Select button 13 6 The left display will change to ICAL to indicate that current calibration is in 14 progress 7 The right display will scroll the following 15 message Adj oCP SorEAL cur 300A 8 Adjust the Output Control knob until the
74. wraparound washer placement for reassembly Clear 3 Perform the Input Filter Capacitor Discharge leads Procedure detailed earlier in this section 5 Using the Analog ohmmeter perform the resis tance tests detailed in Table 1 Refer to fig ure F 2 for test point locations Note Test using an Analog ohmmeter on the Rx1 range Make sure the test probes are making electri cal contact with the conductor surfaces on the PC board V350 PRO LINCOLN 5 19 19 TROUBLESHOOTING amp REPAIR MAIN SWITCH BOARD TEST continued 6 If any test fails replace the switch board See 8 Reconnect leads 201 202 203 204 205 206 207 and 208 to the switch board Ensure that the leads are installed in their proper locations Pre 7 If the switch board resistance tests are OK check Torque all leads nuts to 25 inch 165 before tight connections on plugs J 20 J 21 J 22 and all asso ening them to 44 inch Ibs ciated wiring See wiring diagram 9 Replace the case wraparound cover using a 5 16 nut driver TABLE F 1 SWITCH BOARD RESISTANCE TEST APPLY POSITIVE TEST APPLY NEGATIVE TEST NORMAL PROBE TO TERMINAL PROBE TO TERMINAL RESISTANCE READING Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Greater than 1000 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms Less than 100 ohms V350 PRO LINCOLN 5 20 20 NOTES V350 PRO LINCOLN 5 F 21 F 21 TROUBLESHOOTING amp
75. 0 AMP i Ein 2 1002 J10A 2 lt PRIMARY CURRENT SENSE 1 CIRCUIT BREAKER 4200 uF gt J21 6 gt 616 VIF CONVERTER 1 154 INPUT SWITCH A 801 J8 1 CURRENT FEEDBACK 4 500 Bt Bin 804 E ER ENT SES 22 4200 uF 806 18 6 lt CONTROL BOARD COMMON 19 5 Ce 203 901 J9 1 lt STUD VOLTAGE SENSE STUD VOLTAGE SENSE INPUT y RED 2 903 93 0 LINES 90 202 204 B oL U BLACK G GREEN 2 5121 7605 ap CONVERTER 2 4 002197 810 THERMOSTAT ashed lines represent 4200 uF J21 506 503 Copper bus connections 207 L 321 8 MIT 506 Shown connected for 200 240 Volt Input Voltage x 505 503 J5 3 lt 8 502 52 THERMOSTAT AUXILIARY 5 5 125 48 93 505 a 7 ME 3 605 46 5 lt VOLTAGE FREQUENCY CONVERTER 2 TRANSFORMER ates 9 2 610 1640 VOLTAGE FREQUENCY CONVERTER 2 SSN Ns SS S S8 85 Bp 1010 J10B 1 X PRIMARY CURRENT SENSE 2 yy 1020 lt J108 2 PRIMARY CURRENT SENSE 2 5 FAN 618 C et 611 36 11 GND 415 VAC 716 612 612 16 12 SOFT START CONTROL 715 S 615 16 15 PULSE TRANSFORMER GATE DRIVE zm gt 607 16 7 PULSE TRANSFORMER GATE DRIVE 5a EE 88 ze A 715 15 lt 15 OQ ALIN ID 716 J7 16 FAN CONTROL 55 Sae 33 WS 5 p
76. 0 Pro is an inverter based welding power source that offers multi mode constant voltage CV and constant current CC welding and is rated at 350 amps 34VDC at a 60 duty cycle The Invertec V350 Pro is available in either a construction version no wire feeder connection or auxiliary power and a factory version that includes a wire feeder connection and related power INPUT LINE VOLTAGE AUXILIARY TRANSFORMER amp PRECHARGE The Invertec V350 Pro can be connected for a variety of three phase or single phase input voltages The ini tial power is applied to the V350 through a combina tion line switch circuit breaker located on the front of the machine Two phases of the input voltage are applied to the auxiliary transformer The auxiliary trans former develops four different secondary voltages The 115VAC is used to power the fan motor and also is applied to the 14 pin amphenol type connector for wirefeeder operation The 24VAC and 42VAC volt ages are also applied to the 14 pin amphenol type con nector to power wirefeeders The 28VAC is rectified Optional Solenoid and the resultant 40VDC is applied to the power board The input voltage is rectified by the input rectifier and the resultant DC voltage is applied to the switch board through the reconnect switch assembly located at the rear of the machine The reconnect switch connect the two pairs of input capacitors either in a parallel lower voltage or series higher voltage con
77. 021 25046 5 SDIO MMSZ5254BT1 0 5W 27V 596 T 022 023 25044 12SMT SDIO 1SMB5913BT3 3W 3 3V 5 TR 074 525044 55 SDIO 1SMB5931BT3 3W 18V 596 TR DZ7 DZ8 525001 15025 5 5 15 1206 1 1 8 R1 25001 6191SMT 525040 115 5 5 6 19 1206 1 1 8 SDIO MURS160 1A 600V FAST RECO R3 D1 D2 D3 D6 D7 D8 D9 D15 515128 105 SICS TL4311D LIN V REF 36V 40 xtx 525071 25 SICS PWM CONTROLLER I MODE NP 4 5 515000 10 17 3 OCI2 OCIS 518104 5 HSS MTP VERT MOUNT TO220 NP Q1 Q2 HEATSINKS 18380 15 RES THERMISTOR PTC POS TEMP TR R40 18380 16 RES THERMISTOR NTC NEG TEMP NP R55 T11577 62 CAP 1uF PEMF 200V 10 NP C13 C26 20375 9 TFM L 5763 3 FLYBACK NP T 20375 10 TFM L 5764 3 FLYBACK NP T2 T12704 93 ITRA BUZ30A NMF 21A 200V T0220 24020 4 ICON 4P TIN MINI NP J41 24020 6 CON 6P TIN MINI NP J42 24020 12 12 J43 N A SCREW N A N A WASHER N A 525040 85 SDIO MURS360T3 NP D19 20500 4 1500 2000 POLYPROP C12 31 25020 2SMT ISCAP 0 022uF 50v X7R C49 25020 13SMT 5 150 0805 100 5 C27 C45 C46 C52 25002 47R5SMT SRES 47 5 1210 5 1 2W TR NP
78. 1 R200 R107 R199 R103 R221 R229 R204 R242 R241 R216 R217 R218 R243 R246 R244 R245 R247 R248 R249 R250 R251 R252 R253 R2 525001 47509 SRES 475 1206 1 1 8W TR NP R195 R194 R41 R11 R83 R86 R166 R165 R21 R15 R20 R88 R81 R14 R9 R17 R19 R10 R18 R16 R141 R138 R119 R116 R85 R84 R40 R36 525001 47515 SRES 4 75K 1206 1 1 8W SM100 R190 R192 R182 R184 R137 R146 R209 R210 R222 R42 R46 R47 R51 R67 25003 2000SMT SRES 200 2512 5 1W TR NP R132 R133 525001 15015 SRES 1 5K 1206 1 1 8W NP_ R113 R118 R122 R74 R76 R80 R78 525001 75005 SRES 750 1206 1 1 8W NP R183 525001 51105 SRES 511 MF 1206 1 1 8W TR R24 R23 525001 10045 SRES 1M 1206 1 1 8W TR 9X0098 R212 R211 525001 26725 SRES 26 7K THK 1206 1 1 8W 10 R187 R114 R120 R72 BUY AS L11088 1D0 PART NO THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A Chg Sheet No X INFO XM5626 XE UF MATERIAL TOLERANCE 5 WITH PUBLISHED STANDARDS DO NOT SCALE THIS DRAWING IDENTIFICATION CODE DESIGN INFORMATION 25001 3321SMT_ SRES 3 32K 1206 1 1 8W NP AM2 R123 R128 R129 R179 25001 2212SMT_ SRES 22 1K 1206 1
79. 1 originating from the status board located directly above the mode board Open the cover of the weld mode display on the front of the machine Using a 5 16 nut driver remove the three 5 16 screws as shown in Figure F 28 Carefully maneuver the the mode faceplate up and away from the machine The bottom of the plate will come out first Note The mode board will still be attached to its mounting plate V350 PRO 14 15 16 17 Place both knobs in the full counter clockwise position to gain access to the mounting screws Using a small flathead screwdriver loosen the screw in the Hot Start knob and the Arc Control knob The knobs should slide off of their shafts See Figure F 29 Using a 1 4 wrench remove the nuts and their washers behind the Hot Start and Arc Control knobs Remove the mode board by gently prying from behind the board LINCOLN 5 69 18 19 20 21 22 69 TROUBLESHOOTING amp REPAIR MODE BOARD REMOVAL AND REPLACEMENT continued FIGURE F 29 SCREW IN CAP Replace the mode board Replace the 1 4 nuts and their washers that mount the Hot Start and Arc Control knobs Using a small screwdriver replace the two knobs previously removed Be sure to place both potentiometers in the full counter clock wise position and position knobs for proper calibration Replace the three 5 16 screws previously removed from the front
80. 1uF 0 1uF VN INPUT FROM 2nd LEM C28 0 1uF 4 MC33074AD y R141 11 CURRENT SEN E X30 2 6 vVOVVL X30 7 R114 esq AAS MIL LEZSZSIN LEZSZSINI MEIL 5VA 8 R125 Y h9 15V i C56 dd 0 27uF IRF7103 1 4 MC33074AD Xu 5 VA ADG417D1 11 RTT _ 150K OLTAGE FEEDBAC AD8403ARU10 4 MC33074AD R138 E 1 11 15V 1 lt GAIN lt 11 IDEAL V_AD 2 5V 70 ArcVOLTS SDI_AGND4 SDO AD8403ARU10 9 5 LFLOW STT MMBT4401 3 4 STT CURRENT FLO 1 gt 56 1 lt 56 LO THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A UM MANUFACTURING TOLERANCE PER E2056 ON2PLACE DECIMALS IS 02 LACE DECIMALS IS 002 L ANGLES IS ADEGREE TO AGREE TIS ORANG NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual EQUIPMENT TYPE INVERTER WELDERS DRAWNBY FM swecr ENGINEER DIGITAL CONTROL SCHEMATIC
81. 25 control box to the work using the spring clip on the end of the lead This is only a control lead it carries no welding current 5 Set the voltmeter switch to the electrode polarity chosen 6 Set CONTROL SELECT to REMOTE 7 Setthe MODE to the CV WIRE position 8 Set WELD TERMINALS SELECT to the ON A CAUTION position If you are using an LN 25 without an internal tactor the electrode will be HOT when the V350 PRO is energized 9 Set the ARC CONTROL to the O position and then adjust to suit Figure C 2 V350 PRO LN 25 ACROSS THE ARC CONNECTION DIAGRAM WITH K857 REMOTE CONTROL 6 pin Amphenol K857 Remote Control LN 25 Wire Feeder Work Clip Lead To Work Electrode Cable NOTE Illustration shows electrode connected for negative polarity V350 PRO LINCOLN 5 4 ACCESSORIES CONNECTION OF THE LN 25 WITH K431 REMOTE OPTION TO THE V350 PRO NOTE AN LN 25 CAN ONLY BE USED WITH A FAC TORY OR CE VERSION OF THE V350 PRO 1 Remove input power to the V350 PRO 2 Connectthe electrode cable to the output terminal of polarity required by the electrode Connect the work lead to the other terminal Welding cable must be sized for current and duty cycle of the application 3 Attach the single lead from the LN 25 control box to the work using the spring clip on the end of the lead This is only a control lead it carries no welding current
82. 3 C14 C15 C16 C17 C18 C19 C20 C21 C22 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C65 C66 525020 125 CAPACITOR SMD CERAMIC 100pF 100V 5 C C23 C24 C25 C26 C27 C29 525020 55 CAPACITOR SMD CERAMIC 2700pF 50V 5 X C30 C32 513490 184 CAPACITOR ALEL 330 100V 20 C34 525020 75 CAPACITOR SMD CERAMIC 0 22MF 50V 20 C35 C36 525024 25 CAPACITOR SMD TANTALUM 1 0MF 35V 1096 C37 525024 55 CAPACITOR SMD TANTALUM 4 7MF 35V 10 C40 525024 95 CAPACITOR SMD TANTALUM 100MF 20V 2096 C41 525024 75 CAPACITOR SMD TANTALUM 47MF 20V 10 S C42 C46 525020 65 CAPACITOR SMD CERAMIC 4700pF 50V 5 C63 525020 25 CAPACITOR SMD CERAMIC 0 022MF 50V 10 C64 525040 15 DIODE SMD 1A 400V FAST RECOVERY DO 21 D20 525049 25 DIODE SMD 1A 30V SMA SCHOTTKY D21 525040 55 DIODE SMD DUAL 0 200A 70V UFR D24 D25 D26 525040 25 DIODE SMD 1A 400V DO 214BA AC D3 D6 D7 D19 525044 15 ZENER DIODE SMD 3W 5 1V 5 SMB DZ1 DZ2 DZ3 525046 45 ZENER DIODE SMD 0 5W 12V 5 SOD 123 0210 525044 45 ZENER DIODE SMD 3W 15V 5 SMB 0711 525044 65 ZENER DIODE SMD 3W 27V 5 SMB 0212 525044 35 ZENER DIODE SMD 3W 12V 5 SMB 026 027 028 029 518248 10 CONNECTOR MOLEX MINI PCB 10 PIN J33
83. 47 47 TROUBLESHOOTING AND REPAIR VOLTAGE AND CURRENT CALIBRATION PROCEDURE WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if the machine is capable of producing welding output and to check and adjust if necessary the voltage and or current calibration MATERIALS NEEDED Resistive Load Bank Calibrated Test Voltmeter Calibrated Test Ammeter This procedure takes approximately 20 minutes to perform V350 PRO LINCOLN 5 48 48 TROUBLESHOOTING AND REPAIR VOLTAGE AND CURRENT CALIBRATION PROCEDURE continued CALIBRATION CHECK The calibration of the V350 PRO can be checked 1 using a resistive load bank with the V350 PRO in mode 200 Mode 200 is a constant current test mode 2 1 Press and hold the Mode Select button 3 2 Turn on the V350 PRO 4 3 Rotate the output knob while still holding
84. 525066 25 SICS AD7862 DUAL 12BIT 250kSPS x19 525068 75 51 5 4 6 2 DETECTOR SO X23 525070 45 SICS XCS20FPGA X18 520620 1003 RES 10K AX 5 6 2W HI VOLT TR RI3 RT9 75 RIT 525040 125 SDIO MURS320T3 3A 200V ULTRAFAS 1551 055 056 057 098 099 D100 D101 525020 5 5 100 0805 06 100 5 C15 C18 C22 C25 C27 25000 1000SMT SRES 100 805 196 1 10W R223 R224 R240 R226 R227 R228 12702 60 DIO 1N5358B DZ3 074 712702 59 DIO 1N5333B DZ1 022 525049 25MT SDIO MBRA130LT3 1A 30V SCHOTKY D76 D77 D114 D115 525001 3320S5MT e ola h lalaa alal laoo SRES 332 1206 1 1 4W_ R262 R263 R264 R265 R266 R267 525040 65 5000 085 D86 089 090 091 CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY LINCOLN ELECTRIC TO SEE E2454 BEFORE HANDLING SECURE P C BOARD ASSEMBLY IN PLACE WITH ITEM 3 2 PLACES TOP OF THESE COMPONENTS MUST BE FREE OF POTTING MATERIAL IDENTIFY COMPLETE ASSEMBLY WITH A PRINTED LABEL PER E3867 THERE ARE COMPONENTS ON BOTTOM SIDE OF P C BOARD PROGRAM ITEM 89 WITH ITEM 6 PROGRAM ITEM 98 WITH ITEM 7 PLACE CONNECTOR KEYING PLUG ITEM 9 OVER HEADER PIN IN LOCATION SHOWN PLUG SHOULD BE INSERTED BELOW CONNECTOR TOP SURFACE ALL CONN
85. 9 1 010A X DZ1 S8 SNI 010 gt 072 S9SeSNI AS 74 3 R146 1 gt RESET RAMP AAA 1 4 75 2 ELECTRICAL s 102 5 MURS320T3 J10B X D101 AD8403ARU1 q 8 2 5 lt MURS320T3 Pi d cdi iei sida R160 055 D51 OQLOsuVEOYSQV 10 R149 0 1uF C127 11 MC33074AD BO By VA DIAGRAMS E1 5V E c49 50 20V VA Vo AD_DATA 0 13 DBO DB1 DB2 DB3 084 DB5 DB6 DB7 SAWTOOTH GENERA 27 AGND1 DB10 DB8 DB9 AGND2 DB11 0812 BUSY DB13 AD7863ARS 2 1 AD DATA12 28 AD DATA1 FRIMARY CURRENT SENSE D33 BAV99 R65 33 2K X6 AD DATAO AD DATA4 11 AD DATA5 10 E CAD 4 AD7945BRS 7 15V VV 11 MC33074AD Y Stk A 28 27 22pF Va Va R63 33 2K VWV 15V R71 1 00K 8 7 CURRENT TRANSDUCE SIGNAL IN 4V 500A OUTPUT CURRENT TRANSDUCER INPUT VOLTAGE MSEL1 4 MSELO 4 4 stup__ RR
86. AC Less Than 0 5 Amp 400 Watts 575VAC Less Than 0 5 Amp 400 Watts Note The machine s output terminals should be energized but with no external load on the machine PERFORM THE VOLTAGE AND CURRENT CALIBRATION PROCEDURE This procedure is necessary to insure that the machine is capable of producing output and that the unit is calibrated correctly FAN AS NEEDED F A N The fan should turn on when the machine s output terminals are energized and stay on for approximately 5 minutes after the output terminals are de energized V350 PRO LINCOLN 5 G 1 ELECTRICAL DIAGRAMS WIRING DIAGRAM MACHINE SCHEMATIC ELECTRICAL DIAGRAMS TABLE OF CONTENTS ELECTRICAL DIAGRAMS SECTION CONTROL PC BOARD SCHEMATIC 1 CONTROL PC BOARD SCHEMATIC 2 CONTROL PC BOARD SCHEMATIC 43 CONTROL PC BOARD SCHEMATIC 4 CONTROL PC BOARD 2 POWER SUPPLY PC BOARD 5 POWER SUPPLY PC BOARD 5 SWITCH PC BOARD SCHEMATIC SWITCH PC BOARD ASSEMBLY DISPLAY PC BOARD 5 DISPL
87. AL 5 16 Screws 5 AMPS VoLTs CONTROL SELECT un m E SELECT TD WELD MODE L HOT START 9 5 d Tz Fae 04 Welder Output Input Power Terminal Screws gt gt Switch Screws bm 5 16 Screws 5 Using a 5 16 nut driver remove the four 7 Using a phillips head screwdriver remove the screws from the top and bottom of the front of four screws from around the two welder output the machine See Figure F 27 terminals on the front of the machine See Figure F 27 6 Using a phillips head screwdriver remove the six screws and their washers from around the 8 The front of the machine may now gently be input power switch See Figure F 27 pulled forward to gain access to the mode board Note The front of the machine cannot be removed completely only pulled forward a few inches V350 PRO LINCOLN 5 F 68 10 11 12 13 F 68 TROUBLESHOOTING amp REPAIR MODE BOARD REMOVAL AND REPLACEMENT continued FIGURE F 28 CASE FRONT VoLrs l 5 16 Screws Remove plug 34 from the mode board Remove plug 3
88. AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the input rectifier for maintenance or replacement MATERIALS NEEDED 3 16 Allen wrench 5 16 Nut Driver Flathead Screwdriver Penetrox A 13 Heatsink Compound Silicon Sealant This procedure takes approximately 20 minutes to perform V350 PRO LINCOLN 5 82 82 TROUBLESHOOTING amp REPAIR INPUT RECTIFIER REMOVAL AND REPLACEMENT continued PROCEDURE 1 Remove input power to the V350 PRO 6 Remove the six screws from the terminals using a flathead screwdriver Carefully note the position of 2 Using a 5 16 nut driver remove the case all leads and their positions upon removal wraparound cover Figure F 37 3 Perform the Input Filter Capacitor Discharge 7 Using a 3 16 in allen wrench remove the two Procedu
89. ANDLING ATTACH ITEM 1 TO ITEM 2 WITH ITEM 3 TIGHTEN ITEM 3 TO 60 05Nm 5 3 5 INLBS ENCAPSULATION PER E1911 E TO A MINIMUM DEPTH SO ALL OF THE COMPONENTS LEADS ARE COVERED PLACE BARCODED ASSEMBLY NUMBER IDENTIFICATION AND BARCODED SERIAL NUMBER IDENTIFICATION IN AREA SHOWN THESE COMPONENTS MUST BE COMPLETELY COVERED WITH ITEM 5 BUY PER E3867 TEST PER E3856 RM INVERTER WELDERS DRAWN BY M D MATERIAL TOLERANCE t TO AGREE WITH PUBLISHED STANDARDS ENGINEER SPI REMOTE P C BOARD ASSEMBLY DO NOT SCALE THIS DRAWING APPROVED SCALE FULL DATE 3 3 99 DRAWING No 11109 1 Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the V350 PRO G21 ELECTRICAL DIAGRAMS G 21 SCHEMATIC SNUBBER PRINTED CIRCUIT BOARD B40 C4 0047 1000V NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual 22 PC BOARD ASSEMBLY SNUBBER ELECTR
90. APPROVED BY LINCOLN ELECTRIC COMPANY 2 COATS BUY PER E3867 TEST PER E3856 MS MANUFACTURING TOLERANCE PER 2056 Sheet No INFO DESIGN INFORMATION J REFERENCE EQUIPMENT TYPE MISCELLANEOUS ON 2 PLACE DECIMALS IS 02 XM5626 ON 3 PLACE DECIMALS IS 1 002 DRAWN BY M D ON ALL ANGLES IS 5 OF A DEGREE once mE SPI MODE SELECT P C BD ASSEMBLY WITH PUBLISHED STANDARDS APPROVED SCALE FULL DATE 2 23 99 DRAWNGNo L 11110 1 NOTE Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the LINCOLN E ine 50 G 19 ELECTRICAL DIAGRAMS G 19 SCHEMATIC REMOTE PRINTED CIRCUIT BOARD LINCOLN amp ELECTRIC TRIGGER SEE X411 CLSD E ye TRIGGER he 05 MS
91. ATION WARNING ELECTRIC SHOCK can kill e TURN THE INPUT POWER OFF AT THE DISCONNECT SWITCH BEFORE ATTEMPTING TO CONNECT OR DIS CONNECT INPUT POWER LINES OUTPUT CABLES OR CONTROL CABLES Only qualified personnel should perform this installation Connect the green lead of the power cord to ground per U S National Electrical Code INPUT AND GROUNDING CONNECTIONS 1 Only a qualified electrician should connect the Invertec V350 PRO Installation should be made in accordance with the U S National Electrical Code all local codes and the information detailed below 2 When received directly from the factory multiple voltage machines are internally connected for 460VAC If 460VAC is the desired input then the machine may be connected to the power system without any setup required inside the machine 3 Initial 200VAC 415VAC and 575VAC operation will require an Input voltage panel setup Open the access panel on the rear of the machine For 200 or 230 Position the large switch to 200 230 For higher voltages Position the large switch to 380 575 Move the A lead to the appropriate terminal POWER CORD CONNECTION A 10 ft 3 0m power cord is provided and wired into the machine Follow the power cord connection instructions Incorrect connection may result in equip ment damage Single Phase Input 1 Connect green lead to ground per U S National Electrical Code 2 Connect black and wh
92. AY PC BOARD 5 STATUS PC BOARD 5 STATUS PC BOARD MODE SELECT PC BOARD MODE SELECT PC BOARD REMOTE PC BOARD REMOTE PC BOARD 0 4 SNUBBER PC BOARD SNUBBER PC BOARD 2 V350 PRO LINCOLN 5 G 1 2 WIRING DIAGRAM INVERTEC V350 PRO PRIMARY RECONNECT REAR OF MACHINE H4 380 550 575V 460V SOLENOID E af ABH ay OO 21B 4 4B D 20 6A es 541 Mer WIRE FEEDER REMOTE REAR VIEW NOTES 223 28 N Ds ELECTRICAL DIAGRAMS WIRING DIAGRAM INVERTEC V350 PRO 1001 1002 1010 1020 RIGHT SIDE OF MACHINE 1002 1020 1001 1010 8B J10A J10B MMC poo MS WEE WIRE mE REMOTE REAR VIEW OUTPUT RECTIFIER CURRENT TRANSDUCER RECTIFIER FLEX CIRCUIT CB1 100 A CIRCUIT BREAKER FLEXCIRCUT FLE
93. C125 C55 C96 C98 C100 C28 C82 C14 C11 C83 C103 C121 C101 C117 C115 C111 C113 C85 C90 C48 C93 C109 C120 C127 C106 C95 C105 C73 C68 C8 C114 C108 C99 C77 C76 C75 C84 C79 C67 C88 C80 C50 C78 C23 C21 C91 C51 C92 C58 C57 C52 C60 C59 C131 C123 C1 514390 173 CAP 1uF RA 63V 10 NP_ C136 C135 525020 25 5 0 0224 0805 50 78 10 C86 525020 105 SCAP 4700pF 0805 50V XR 1096 25020 5SMT SCAP 22pF 0805 50V COG 596 TR N C118 C116 C128 C130 25020 185MT SCAP 10pF CER 0805 100V 5 C32 25020 13SMT_ SCAP 150pF 0805 100V COG 5 TR C64 C89 C26 C35 C36 C38 C37 25020 4SMT SCAP 820pF 0805 50V COG 5 TR CA C74 C71 C19 C70 C5 C72 C6 C17 524833 1 CAP 0 27uF MF 50V 5mm 5 TR NP_ C56 C34 25020 14SMT_ SCAP 330pF 100V C126 C143 25025 5SMT_ SCAP 4 7uF 7343 35V 10 TR NP C12 C102 C1 C9 C10 C39 C40 C16 C61 525024 25 5 1 3528 35 94 97 104 C107 C47 C81 C2 46 525024 85 SCAP T0uF TAN 6032 TR NP C66 C62 C65 25024 10SMT SCAP 22uF TAN 7343 25V 1094 C119 C110 C49 C54 513490 179 CAP 1000uF ALU 35V 20 NP C45 513490 182 5 120 25 20 C13 525040 25 SDIO 1A 400V D0 214BA GLS D68 067 D4 03 075 063 064 065 070 D72 071 073 074 525046 15 SDIO MMSZ5231BT1 5 1V NP
94. CE ch ge shtNo EQUIP ON HOLES SIZES PER E 2056 E TS J31 J311 ON 2 PLACE DECIMALS 16 02 LINCOLN ELECTRIC CO TYPE E ON 3 PLACE DECIMALS 15 002 6 2 2000 EVELAND OHIO U S A 21 ATUS INPUT PCB SCHEMATIC ON ALL ANGLES IS 5 OF DEGREE 17 MATERIAL TOLERANCE TO AGREE SCALE SHT WITH PUBLISHED STANDARDS LD DATE 05 18 00 SUP S D G 0 19338 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual LINCOLN E Vaso PRO PC BOARD ASSEMBLY STATUS ELECTRICAL DIAGRAMS PART NO P C BOARD REFERENCE REQD DESIGNATORS DESCRIPTION L11107 B L11166 1 E3165 E3539 1 1 2 01 oz P C BOARD BLANK FLEXASSEMBLY E3165 25 35 1 00 ELECTRICAL INSULATING COMPOUND FOR ITEMS LISTED BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT SPECIFICATIONS 13490 104 C1 CAPACITOR TAEL 39 20V 1096 516668 11 C2 C3 C4 C5 C6 C8 C11 C12 C27 0 1 50V 1096 13490 42 C7 C9 C26 CAPACITOR TAEL 1 0 35V 10 16668 5 C10 C21 C22 C25 CAPACITOR CEMO 022 50V 20 516668 3 13 14 15 16 17 18 CAPACITOR CEMO 100P 100V 5 13490 40 23 24 CAPACITOR TAEL 2 7 50V 10 18248 10 J31 CONNECTOR MOLEXMINI PCB 10 PIN 24020 4
95. COMPONENT SIDE OF BOARD 6 2 2000nA V350 PRO on ELECTRICAL DIAGRAMS SCHEMATIC CONTROL BOARD 1 BAV70LT D89 15 d 19 DATAO 1uF 1uF nhATAT 100pF 35V 35V D X2 A 5 4 1 DATA1 4401 3 3 D X271 Q D D 2 Q ISE_GND rise 7 m E 1r Q AN TAACS73 MBT4401 C94 C107 ee DATA Q4 10 0K C18 uoza lt 7 AT 2 4 9 Li 5595 TToopF rea LE6SINSL ex 16 16 C44 m 3 ed VAS NN X25 C111 Mal ATO0pF C143 vep H3 SNNT 4401 20 A LEZSZSWIN asv C IRES 124 Were NER NOISE GND 7 524 ADDRi 25 0 1uF 475 Bs V7 NOISE GND Vb ADBR2 341 Vb get C25 A 171 210 3 X90 4 29 MSL T C43 VIOVVL R179 vst 100pF 16890151 82 rd X23 533 35 DATAS D 38 DATAZ durum 820pF NEIL UTPUT2 ADDRIO 4 40 DATAS NoISE GN MMBT4401 GND1 4401 12 5 92 DATAS 580746 Vo R15 7 GND2 1 WAY N ADDRIS 4 30 DATAS Q5 475 INPUT PWRDN INT 4 6 2 8 32 451 2 2 05 SvS1V8 1 R40 475 411048 osa VVV IRES 100pF 3 LE6SINSL NOISE eno Y MMBT4401 3 BAV70LT1 475 59177 rw 7 R21 2 1
96. D 201 SS X15 15458 45 IC PWM CONTROLLER MODE 2842A SOIC X16 517900 265 IC CMOS SMD MUX DAT 8 INPUT HC151 SS 2 517900 105 IC SMDCMOS REGISTER SHFT S PI SO 8 BI X3 X4 15105 75 IC SMD CMOS CONVERTER A D MPU 10 BIT X5 15128 18 IC OP AMP SMT QUAD HIGH PERF 33074D X6 X7 17900 28SMT SHIELD SIDE REMOTE E 75 07s le e 176 nui 2 5 079 37 e mmi in 05 Q8 O00000 6 ni mss i uon ze wt x 11109 1 AR IC SMD CMOS HEX INVERTING BUFFER 3 ST X8 PART NO DESCRIPTION REFERENCE DESIGNATOR G3709 A P C BOARD BLANK M19436 4 POTTING TRAY 58025 80 SELF TAPPING SCREW L11166 1 FLEX CIRCUIT ASSEMBLY E2527 66 7g 2 19 oz EPOXY ENCAPSULATION RESIN E3539 57g 02 oz ELECTRICAL INSULATING COMPOUND SPECIFICATIONS FOR ITEMS LISTED BELOW REFER TO ELECTRONIC COMPONENTS DATABASE FOR COMPONENT 7 525020 35 38 CAPACITOR SMD CERAMIC 0 1MF 50V 10 X C2 C3 C4 C5 C6 C8 C9 C10 C11 C12 C1
97. DSP 07 18 DSP D8 19 DSP D9 22 DSP 01023 24 D1275 1 DSP BIO 6 67 XTAL1 CLKIN amp IXTAL2 a cias ADCSOC IOPCO 2 65 CLKOUT IOPC1 XF IOPC2 BIO IOPC3 CAP1 QEP1 IOPCA 2 2 5 6 CAP4 IOPC7 DS PS READY MP MC 2 RESERVED X22 TMS320F240 5 72 OUTPUT ON lt 1 73 9 76 77 78 79 5 ADCIN9 IO PA2 ADCIN10 ADCIN11 8 ADCIN12 5 ADCIN13 ADCIN14 ADCIN15 5 TMRCLK IOPB7 109 TMDIR IOPB6 18 T2PWM T2CMP IOPBA 28 T1PWM T1CMP IOPB3 PWM9 CMP9 IOBP2 PWMB CMPB IOBP1 105 102 01 PWM7 CMP7 IOPBO 10 817 gt 2 PWM6 CMP6 PWMS CMPS 35 1 55 PWMS CMP3 ts gt 1 2 2 PWMT CMP1 gt 1 SCIRXD IO 7 SCITXD IO SPISIMO IO 5 SPISOMI IO 59 SOICLK IO 10 0K R91 MANA 10 0K R92 AA 10 0K R93 ANN 10 0K R94 ANN 10 0K R95 10 0K R96 10 0K R98 w N N P D 5SPI 155 w w X33 A1 B 245 2 4 5 AT A8 GND
98. ECTIFIER MODULE MOUNTING BOLT LOCATIONS The output rectifier modules are ready for removal and or replacement Before replacing the diode module apply a thin even coat of Penetrox A 13 heatsink compound to the bottom surface of the diode module Note Keep the compound away from the mounting holes Press the module firmly against the sink while aligning the mounting holes Insert each outer screw through a spring washer and then a plain washer and into the holes Start threading all three screws into the heat sink 2 or 3 turns by hand Mounting Bolts 3 16 Allen Bolts 9 64 Allen Bolts Mounting Bolts LEFT SIDE V350 PRO LINCOLN 5 F 88 F 88 NOTES V350 PRO LINCOLN 5 F 89 F 89 TROUBLESHOOTING amp REPAIR CURRENT TRANSDUCER REMOVAL AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following
99. ECTORS MUST BE GREASED WITH ITEM 5 PRIOR TO ENCAPSULATION ENCAPSULATION PER E1911 E TO A MINIMUM DEPTH SUCH THAT ALL COMPONENT LEADS ARE COVERED CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTANCE OHMS BUY PER E3867 TEST PER E3856 C REFERENCE EQUIPMENT TYPE DRAWN BY INVERTER WELDERS ENGINEER T ODONNEL SUPERSEDING SUBJECT CONTROL P C BOARD ASBLY SCALE NONE DATE 4 6 99 DRAWING 11088 1 V350 PRO G 9 ELECTRICAL DIAGRAMS SCHEMATIC POWER SUPPLY PRINTED CIRCUIT BOARD Machine Control Power Supply 60 5Volts 750 Amp 10 55 VDC Operation 022 E R 15Volts 750 Amp DC Input Machine Control Shut Down Capacitor DC Input 15Volts 100 121k 33W Loug Undervoltage et MC Detect lt 30VDC D23 108 E
100. ER SCHMITT HEXHC14 Xt 713657 6 LED T 1 RED HLMP K101 LED1 LED2 LED3 LED4 517395 6 LED DISPLAY 7 SEGMENT CC BRIGHT DISP1 DISP2 DISP3 DISP4 IDISPS DISP6 DISP7 DISP8 113657 12 LED T 1 3 4 YELLOW HI NTENSITY LED5 LED6 LED7 517900 265 05 5 8 151 55 x2 525000 10015 IRESISTOR SMD METAL FILM 1 10W 1 00K 1 R21 R26 525000 15015 IRESISTOR SMD METAL FILM 1 10W 1 50K 1 R6 R16 525000 47515 IRESISTOR SMD METAL FILM 1 10W 4 75K 1 R24 525000 1005 IRESISTOR SMD METAL FILM 1 10W 10 00HM R22 R23 R25 525000 12125 IRESISTOR SMD METAL FILM 1 10W 12 1K 1 R9 R10 R11 R12 R13 R14 525000 47525 IRESISTOR SMD METAL FILM 1 10W 47 5K 1 R27 525000 26705 IRESISTOR SMD METAL FILM 1 10W 2670HMS R20 517900 105 IC SMDCMOS REGISTER SHFT S PI SO 8 BI x4 UNLESS OTHERWISE SPECIFIED CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTANCE OHMS NOTES N A DO NOT COAT WITH ENCAPSULATION MATERIAL CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY SEE E2454 BEFORE HANDLING N C USE ITEM 3 TO STAND ITEM 12 FROM THE P C BOARD THERE MUST NOT BE MORE THAN 020 GAP BETWEEN SPACER AND P C BOARD OR BETWEEN SPACER AND LED ENCAPSULATE P C BOARD SPACER AND LOWER HALF OF LED N D DISP 1 THRU DISP 8 MUST ALWA
101. ER USE A SHORTING STRAP FOR THIS PROCEDURE Locate the eight capacitor terminals shown in fig ure F 1 Using electrically insulated gloves and pliers hold the body of the resistor with the pliers and con nect the resistor leads across the two capacitor terminals Hold the resistor in place for 10 sec onds DO NOT TOUCH CAPACITOR TERMINALS WITH YOUR BARE HANDS Repeat the discharge procedure for the other three capacitors Check the voltage across the terminals of all capacitors with a DC voltmeter Polarity of the capacitor terminals is marked on the PC board above the terminals Voltage should be zero If any voltage remains repeat this capacitor dis charge procedure FIGURE F 1 LOCATION OF INPUT FILTER CAPACITOR TERMINALS EIGHT CAPACITOR TERMINALS POWER RESISTOR INSULATED PLIERS d INSULATED n GLOVES V350 PRO LINCOLN 5 17 TROUBLESHOOTING amp REPAIR WARNING This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 F 17 18 18 TROUBLESHOOTING amp REPAIR MAIN SWITCH BOARD TEST continued FIGURE F 2 MAIN SWITCH BOARD LEAD LOCATIONS TEST PROCEDURE 1 Remove input power to the V350 PRO 4 Using a 7 16 wrench locate label and remove leads 201 202 203 204 205 206 207 and 2 Using a 5 16 nut driver remove the case 208 from the switch board Note lead and
102. HER CHIP SELECTS FIXTURE DISPLAY REMOVE R22 AND R23 BOARD AS FOLLOWS va 5 O CONNECT A NORMALLY OPEN PUSHBUTTON 1 O L THE LOCATIONS OF VIA 1 THRU VIA 5 ARE SILKSCREENED ON THE BOARD HC368D X3 HC368D X3 DATA ENABLE DATA_IN XS 3 clock Rx MC14489DW 1 2 LEDS ee BANK BANKS DATA OUTI ENABLE 2 1 DATA IN y CLOCK Rx MC14489DW BANK1 LED6 at LED7 ar THERMAL LEDS HC368D OLED1 LED2 BANK2 BANK3E BANK 3 8 L1 gt 4 5 6 7 DATA _OUT ENABLE 2 1 DATA_IN CLOCK Rx MC14489DW BANK 3 P col a1b1c1 d1 e1 f1 g1 n1 RIGHT DISPLAY BANK2 BANK BANK BANK 3 8 if 1 I 9 iE 2 1510 GND Vcc 3 01 x3 20 GND Vcc X4 HC165D GND x5 MC144890W Vss X6 MC144890W Vss XT MC14489DW Vss F
103. ICAL DIAGRAMS G 22 ITEM REQ PART NO DESCRIPTION 520500 4 CAPACITOR PPMF 0047 1000V BOX 14648 20 RESISTOR WW 5W 150 5 SQ R2 R4 J T14648 25 RESISTOR WW 5W 10 596 SQ PART NO DESCRIPTION M19532 A BOARD BLANK 713157 16 TERMINAL T9147 11 EYELET FEMALE 4 T9147 15 EYELET MALE 4 NOTES N A FEMALE EYELET TO BE AGAINST THE COPPER SIDE AS SHOWN EYELET MUST SPIN AFTER CLINCHING N B SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET SNUBBER AND ALL AROUND EYELET ON COPPER SIDE ONLY NO ICICLES OR SOLDER BLOBS PERMITTED HEIGHT SIDE EYELET DETAIL MANUFACTURED AS 1911 M19532 1A0 ENCAPSULATE WITH E1844 2 COATS TEST PER E3817 SN IDENTIFICATION CODE THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A INVERTER WELDERS t 2 XM5626 ON 3 PLACE DECIMALS IS 002 DRAWN Bi ol GLES IS 5 O G TET d APPROVED ECCE SCAEENONE DATEIO 6 99 DRAWNGN 19532 1 NOTE Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your fact
104. INCOLN EL CLEVEL 01 MBOLS PER E1537 MED 022 50V UNLESS OTHERWISE SPECIFIEI 1 4W UNLESS OTHE PECIFIED UNLESS OTHERWI 63708 1A1 EQUIP TRIC TYPE LAST NO USED R LABEI SUPPLY VOLTAGE NET Power suPPLY source 5 7 COMMON CONNECTION 7 1 FRAME CONNECTION RMS CURRENT EARTH GROUND CONNECTION AND OHIO U S A aie SCALE NONE BK 0 0 pate 05 24 00 chk xo G 3708 MISC SPI REMOTE SCHEMATIC 8 V350 PRO G 20 ELECTRICAL DIAGRAMS G 20 PC BOARD ASSEMBLY REMOTE NOTE machine 525001 75005 RESISTOR SMD 7500HMS 1 4W 1206 196 TR R135 525000 22135 RESISTOR SMD METAL FILM 1 10W 221K 1 R138 525000 10015 RESISTOR SMD METAL FILM 1 10W 1 00K 1 R139 525000 35705 RESISTOR SMD METAL 1 10 3570 5 R140 525000 47525 RESISTOR SMD METAL FILM 1 10W 47 5K 1 R141 25003 15ROSMT RESISTOR SMD 1W 15 00HMS 176 R142 R143 R144 525010 25 RESISTOR SMD MF 121K 1 4W 1 SURGE R15 R16 525010 35 RESISTOR SMD MF 1W 20 0K 1 SURGE R17 R18 R76 R80 R119 R120 525000 47515 RESISTOR SMD METAL 1 10 4 75 1 R2 R3 R4 R5 R6 R7 R28 R29 R39 R40 R116 525000 10025 RESISTOR SMD METAL FILM 1 10W 10 0K 1 R26 R27 R32 R33 R34 R35 R36 R37 R38 R145 525000 26705 RESISTOR SMD METAL
105. K930 1 K428 K446 K449 TIG Module LN 25 Off the Arc Factory Version K1728 1 The factory model is the construction model with the addition of the Wire Feeder Remote Adapter this form the V350 Pro provides the hardware to power and connect to 24 42 or 115 VAC wire feeders K857 Remote Output Control K814 Arc Start Switch K812 Hand Operated Amptrol K870 Foot Operated Amptrol K930 1 TIG Module K428 K446 K449 LN 25 K617 1 or 2 K618 1 or 2 LN 742 K440 1 K567 1 LN 7 GMA K1559 1 K1564 1 LN 10 K1499 1 K1521 1 DH 10 CE Version K1728 3 The CE version is the Factory version with the addition of power line filtering allowing the machine to comply with the European and Australian EMC emission requirements Field Installed Options Accessories Two versions of the V350 Pro are available from the factory for both the CE and ROW versions Options for K1728 1 Factory and K1728 3 CE V350 s TIG Gas Control Kit K1762 1 Advance Process Panel K1763 1 Options for all models of V350 PRO Undercarriage K1764 1 V350 PRO LINCOLN 5 Section 0 1 Section 0 1 TABLE OF CONTENTS MAINTENANCE Maintenant e ec CE Section D Input Filter Capacitor Discharge eee emen D 2 Routine MainterialcG e ee OR ei ai dede ed ec ble Ue Ble reb ag ee bse D 2 Periodic e tae eed ee rene ee Een D 3 Ther
106. Make sure the V350 Pro is grounded correctly The machine is self clearing when condition ceases with the V F signals from the main switch board to the control board Perform the Main Switch Board Test Perform The control board may be faulty bad node The selected weld mode does not exist in the weld table that is presently loaded in the machine Press the Mode Select button to select a different welding mode Perform the Board Test Perform the SPI Cable Resistance and Voltage Test The control board may be faulty NOTE If more than one fault message is being displayed perform all the checks for the faults before replacing the printed circuit board V350 PRO LINCOLN 5 14 NOTES V350 PRO LINCOLN 5 F 14 15 TROUBLESHOOTING amp REPAIR INPUT FILTER CAPACITOR DISCHARGE PROCEDURE WARNING 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 electrical 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 troubleshooting a
107. N 2 CAPBUV UV 4 POSAPCS1 122 DATATT ADDR 1 19 32 ICS2 MICRO CONTROLLER 53 SIDE PQSSPCS2 D THERMOSTAT 4 POSGPCSS 117 DATATA RW CE 37 55007 7 12 37 DATA14 116 DATA15 152 WE pis 9 OVR CUR 1 50 LB GND1 FET MC68332PV 1 51 UB GND2 34 80 CAPA_UV i211 FET FILTER CAPACITOR VOLTAGE MONITORING IOISE GND MN CNT FAULT INT VECSZSWIN LEZSZSWN OUTPUT ON MN OU 1015 R33 1016B DISABLE_455 1017 gt 4 m 4a AVS LEZSZSWW 22 VEZSZSINW Vb WNOISE Vo THERMOSTA INT 1 3PH MANUFACTURING TOLERANCE PER Ets EQUIPMENT INVERTER WELDERS IN 2 PLACE DECIMAL 02 xm5626 2 pee DIGITAL CONTROL SCHEMATIC WEE
108. OR MF 1 4W 1 00K 1 R109 R128 R129 R55 R56 R57 R58 4 5243763 _ WW 10W 100 5 R61 R77 2 519400 8251 RESISTOR MF 1 4W 8 25K 196 R65 R120 2 S19400 2001_ RESISTOR MF 1 4W 2 00K 1 R78 R79 2 5162965 1 2 10 10 LINEAR T1 1 513000 46 _ TRANSFORMER PCB T2 T3 2 19612 CURRENT TRANSDUCER 125 TURN 1__ 713640 24 175 5 1201 20 TRII 1 515161 27 TRIAC T220 8A 800V X1x4 2 515128 10 VOLTAGE REF ADJ PRECISION 4311 X2 X3 2 15128 18 HIGH PERF 33074 CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTOR OHMS ITEM PART NO DESCRIPTION P C BOARD BLANK 1 NA ELECTRONIC MODULE 1 A2 2 TERMINAL B211 8218 8204 8205 8209 5 CURRENT TRANSDUCER 2 T3 2 POWER TERMINAL 8201 8208 2 EYELET FEMALE 8 EYELET MALE 8 SEALANT 5 007 MAKE PER E1911 ENCAPSULATE WITH E1844 3 COATS TEST PER E3817 SW THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A DESIGN INFORMATION REFERENCE EQUIPMENT TYPE INVERTER WELDERS MANUFACTURING TOLERANCE PER E2056 C79 Sheet No ON 2 PLACE DECIMALS IS 02 6 2 2000 E E DECI E MATERIAL TOLERANCE t TO AGREE WITH PUBLISHED STANDARDS XM5626 XA DRAWNBY SUBJECT ENGINEER ISUPERSEDING SWITCH P C BOARD ASSEMBLY
109. PROBLEMS 1 Contact your local authorized Lincoln Electric Field Service Facility for technical assis tance TROUBLESHOOTING GUIDE RECOMMENDED COURSE OF ACTION 1 Contact the Lincoln Electric Service Department 1 800 833 9353 WELD The machine is dead no out put no displays 1 Make sure the input line breaker switch is in the ON position 2 Check the main input line fuses If open replace 3 Check the 2 amp circuit breaker CB2 Reset if tripped 4 Make sure the reconnect switch and jumper lead is configured correctly for the applied input voltage 5 If the machine is being operat ed with single phase input volt age make sure the red lead is not connected See the Installation Section 1 Perform the Auxiliary Transformer Test 2 Perform the Power Board Test 3 The control rectifier and or associated filter capacitor C5 may be faulty Check and replace as necessary 4 Perform The SPI Cable Resistance and Voltage Test 5 The Control Board may be faulty The main input fuses or breaker repeatedly fail 1 Make certain the fuses or breakers are sized properly 2 Make sure the reconnect switch and jumper lead is configured correctly for the applied input voltage 3 The welding procedure may be drawing too much input current or the duty cycle may be too high Reduce the welding current and or reduce the duty cycle 1 Check the reconnect swit
110. PTOCOUPLER PHOTO Q 70V CNY17 3 VDI 1__ 15000 29 OPTOCOUPLER TRIAC DRV RANDOM 600V 1 12704 75 __ TRANSISTOR NMF 1247 4A 900V SS Q2 Q3 04 05 4 T12704 73 MOSFET 4 PIN DIP 1A 100V RFD110 SS 06 1 12704 69 TRANSISTOR PNP TO226 0 5A 40 2 4403 R1 R2 R3 R4 R7 R8 R9 R10 16 714648 5 _ RESISTOR WW 5W 3 3K 5 SQ R124 R125 R126 R127 R130 R131 R132 R133 R11 R12 R30 R31 4_ 319400 1503 RESISTOR MF 1 4W 150K 196 R13 R39 R43 R60 R81 RO2 6 519400 3321 RESISTOR MF 1 4W 3 32K 1 R137 1 519400 3570 RESISTOR MF 1 4W 357 1 R138 1 19400 1500_ RESISTOR MF 1 4W 150 1 R139 1 519400 4750 RESISTOR MF 1 4W 475 1 R14 R107 2 S19400 1652_ RESISTOR MF 1 4W 16 5K 1 R140 1 19400 39R2 RESISTOR MF 1 4W 39 2 1 R15 R20 R21 R22 R27 R28 12 519400 1080 RESISTOR MF 1 4W 10 0 1 R97 R98 R99 R100 R101 R106 R29 R83 R122 R141 4_ 319400 1000 _ RESISTOR MF 1 4W 100 1 R32 R33 R34 R48 R49 R50 16 519400 1003 RESISTOR MF 1 4W 100K 1 R51 R62 R63 R74 R75 R85 R86 R87 R134 R135 R35 R52 R73 R84 4 519400 6191 RESISTOR MF 1 4W 6 19K 1 R36 R37 R123 3 519400 2213 RESISTOR MF 1 4W 221K 1 R38 R40 R42 R45 R53 R59 14 519400 1002 RESISTOR MF 1 4W 10 0K 1 R66 R69 R70 R72 R80 R82 R142 R143 RA1 R67 2 519400 4752 RESISTOR MF 1 4W 47 5K 1 R44 R68 2 11230079 RESISTOR WW 1W 1 0 1 R46 R76 2 519400 3322 RESISTOR MF 1 4W 33 2K 1 R47 R64 2 S19400 2000_ RESISTOR MF 1 4W 200 1 R5 R6 R19 R26 R93 R105 9 S19400 1001 RESIST
111. R E1537 VIEWED FROM COMPONENT SIDE OF BOARD 6 2 2000A 63707 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine LINCOLN B V350 PRO G 3 ELECTRICAL DIAGRAMS SCHEMATIC COMPLETE MACHINE LINCOLN B SWITCH BOARD MAIN 2204 que INPUT 200 20 802 CONTROL BOARD 609 59 15 RECONNECT SWITCH CRI 602 46 2 MAIN RELAY CONTROL 20 616 1646 lt VOLTAGE FREQUENCY CONVERTER 1 gt E SNUBBER 608 J6 8 VOLTAGE FREQUENCY CONVERTER 1 5 BOARD 1001 J10A 1 PRIMARY CURRENT SENSE 1 40
112. R6 R7 R57 R58 25000 10ROSMT SRES 10 TKF 0805 1 1 10W R9 R60 R61 25002 30R1SMT SRES 30 1 FXD 1210 5 1 2W TR R35 R36 525068 95 STRA 78M15C DPACK 515128 65 STRA 7815C DPACK xB 525068 105 STRA 79M15C DPACK 525002 24915 SRES 2 49K 1210 5 1 2W T R R19 R23 25002 1211SMT SRES 1 21K 1210 5 1 2W TR NP R46 R48 R37 525002 15005 5 5 150 1210 5 1 2 R25 R44 R62 R63 R64 525001 47505 5 5 475 1206 R8 N A SHSS MTP D2PACK TO263 X8 016 HEATSINKS 25001 4753SMT 5 5 475 1206 1 1 8 21 525001 15 05 5 5 15 1206 1 1 8 R43 R32 E1868 THERMALLOY THERMALCOTE 251 Q1 Q2 HEATSINK COMP 525001 75025 RR E ER P af PS cof PRO ER ER ER P P ER ER ERE ER RP ERR BER P ER ER RR UR cof SP t ER E ER ER PE ro Rn SRES 75K 1206 1 R31 525068 15 SICS 78M05 DPAK V REG Xe X7 BUY AS G3632 2D0 IDENTIFICATION CODE PART NO CAPACITORS MFD VOLTS INDUCTANCE HENRIES RESISTANCE OHMS BUY PER E3867 TEST PER E3856 P THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A EQUIPMENT TYPE INVERTER WELDERS TKIEY S
113. SVM152 A INVERTEL V35U PRU For use with machine code numbers 10651 10669 Safety Depends on You Lincoln arc welding and cutting equipment is designed and built with safety in mind However your overall safety can be increased by proper installation and thoughtful operation on your part DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READ ING THIS MANUAL AND THE SAFETY PRECAUTIONS CON TAINED THROUGHOUT And most importantly think before you act and be careful SERVICE MANUAL LINCOLN Copyright 2000 Lincoln Global Inc World s Leader in Welding and Cutting Products Sales and Service through Subsidiaries and Distributors Worldwide Cleveland Ohio 44117 1199 U S A TEL 216 481 8100 FAX 216 486 1751 WEB SITE www lincolnelectric com SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains are known to the State of California to cause can chemicals known to the State of California to cause cer birth defects and other reproductive harm cancer birth defects or other reproductive harm Ihe Above For Diesel Engines The Above For Gasoline Engines ARC WELDING CAN BE HAZARDOUS PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH KEEP CHILDREN AWAY PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING R
114. TER CAPACITOR TERMINALS EIGHT CAPACITOR TERMINALS INSULATED PLIERS INSULATED POWER t N a GLOVES RESISTOR 5 Locate the eight capacitor terminals shown in fig ure D 1 6 Using electrically insulated gloves and pliers hold the body of the resistor with the pliers and connect the resistor leads across the two capacitor termi nals Hold the resistor in place for 10 seconds DO NOT TOUCH CAPACITOR TERMINALS WITH YOUR BARE HANDS 7 Repeat the discharge procedure for the other three capacitors 8 Check the voltage across the terminals of all capacitors with a DC voltmeter Polarity of the capacitor terminals is marked on the PC board above the terminals Voltage should be zero If any voltage remains repeat this capacitor dis charge procedure ROUTINE MAINTENANCE 1 Every 6 months or so the machine should be cleaned with a low pressure airstream Keeping the machine clean will result in cooler operation and higher reliability Be sure to clean these areas All printed circuit boards Power switch Main transformer Input rectifier Auxiliary Transformer Reconnect Switch Area 2 Examine the sheet metal case for dents or breakage Repair the case as required Keep the case in good con dition to insure that high voltage parts are protected and cor
115. The Lincoln Electric Company for credit it must be in the static shielding bag This will prevent further damage and allow proper failure analysis 4 Testthe machine to determine if the failure symp tom has been corrected by the replacement PC board NOTE Allow the machine to heat up so that all electrical components can reach their operating temperature 5 Remove the replacement PC board and substitute it with the original PC board to recreate the original problem a If the original problem does not reappear by substituting the original board then the PC board was not the problem Continue to look for bad connections in the control wiring harness junction blocks and termi nal strips b If the original problem is recreated by the substitution of the original board then the PC board was the problem Reinstall the replacement PC board and test the machine 6 Always indicate that this procedure was followed when warranty reports are to be submitted NOTE Following this procedure and writing on the warranty report INSTALLED AND SWITCHED PC BOARDS TO VERIFY PROBLEM will help avoid denial of legitimate PC board warranty claims V350 PRO LINCOLN 5 TROUBLESHOOTING amp REPAIR Observe Safety Guidelines detailed in the beginning of this manual PROBLEMS SYMPTOMS Major physical or electrical dam age is evident when the sheet metal cover is removed POSSIBLE AREAS OF MISADJ USTMENT S OUTPUT
116. UBJECT DIGITAL POWER PC BD ASBLY DATEI2 09 99 DRAWINGNo G 3632 2 Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the machine V350 PRO G 11 ELECTRICAL DIAGRAMS G 11 SCHEMATIC SWITCH PRINTED CIRCUIT BOARD RELAY SIGNAL FROM CONTROL BOARD SOFT START SIGNAL FROM CONTROL BOARD PWM DRIVE K 1 2n 12 J22 25 Fan CONTROL POSITVE INPUT RECTIFIER t R11 CAPACITOR PRECHARGE 3 150K RECONNECT 206 V F CONVERTER 1 300VDC CAP 5 89VDC AT VREF A 2 40KHZ 1VDC CHANGE ON CAP 8HZ
117. WITH PUBLISHED STAND Los DRAWING NN DATEI2 15 99 DRWNGNo G 3789 1D0 1 NOTE This diagram is for reference only It may not be accurate for all machines covered by this manual V350 PRO G 5 SCHEMATIC CONTROL PC BOARD 2 LINCOLN B Tam CD a 2 LED1 ZS 187 v S 4TuF GREEN 1569951 gt 2 R31 2 21 c9 an P 47uF GREEN 35V X gt NOISE GND 910 Dx LED2 Zw 9 689 15 063 516 2 MC79LOSABD 1 14 PW1 X10 74 14 14 7 2 X30 74 14 7 441 R89 1 00K GREEN 35V LEDS WA 09 A MS 06668151 WNOISE GND R82 1 00K C39 LED3 SZ GREEN 35V AC9 02658151 155 X gt R134 221K 40 27 GREEN 35v tra LED4 VA or MS 0 659 15 GsPI CONTROL BOARD VOLTAGE SUPPLIE Ves 4 5 VA R30 229 ASE C16 15V 60668151 C133 0 1uF VV 100 VS MSL 6065851 GROUND TIE POINT D46 9 1 5W 6 2V 1SMB5920 ELECTRICAL DIAGRAMS 8 65 RS232 RXD gt 1
118. X CIRCUIT FRONT OF MACHINE eS Bel 481 4 24459 4 lt lt lt lt 21 21B 2A 4A 75A 76A 77A LEFT SIDE OF MACHINE COLOR CODE BLACK G GREEN RED W WHITE U BLUE N BROWN Y YELLOW N A 1 FOR MACHINES SUPPLIED WITH INPUT CABLE FOR SINGLE PHASE INPUT CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRICAL CODE CONNECT BLACK AND WHITE LEADS TO SUPPLY CIRCUIT WRAP RED LEAD WITH TAPE TO PROVIDE 600V INSULATION N B SINCE COMPONENTS OR CIRCUITRY OF A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY HAVING A COMMON CODE NUMBER N C PLACE A LEAD ON APPROPRIATE CONNECTION FOR INPUT VOLTAGE 125 71 FOR THREE PHASE INPUT CONNECT GREEN LEAD GROUND NATIONAL ELECTRIC CODE CONNECTION SHOWN IS FOR 550 575V OPERATION J33 J22 J41 J8 CONNECT BLACK RED amp WHITE LEADS TO SUPPLY CIRCUIT J311 P55 49 a P53 120 21 2 FOR MACHINES NOT SUPPLIED WITH INPUT CABLE 12 gt ZH 4 FOR SINGLE PHASE INPUT GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES Par Es CONNECT TERMINALS U amp W TO SUPPLY CIRCUIT E FOR THREE PHASE INPUT GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES PROTECTIVE BONDING CIRCUIT CONNECTOR CAVITY NUMBERING SEQUENCE CONNECT TERMINALS U V amp W TO SUPPLY CIRCUIT ELECTRICAL SYMBOLS PE
119. YS BE MATCHED BY VENDOR NAME DO NOT MIX DIFFERENT VENDORS ON THE SAME BOARD ASSEMBLY N E DO NOT INSERT THESE COMPONENTS N F CONNECTOR MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION ERE L11130 2CO S BARRAS IDENTIFICATION CODE BUY PER E3867 TEST PER E3856 D THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY CLEVELAND OHIO U S A UN D TOLERAN y MANUFACTURING TOLERANCE PER E2056 7 NFO Chg Sheet No ON 2 PLACE DECIMALS IS 702 XM5626 DESIGN INFORMATION REFERENCE EQUIPMENT TYPE MISCELLANEOUS ON 3 PLACE DECIMALS IS 002 ON ALL ANGLES 15 75 OF A DEGREE DRAWN F V WITH PUBLISHED STANDARDS SPI DISPLAY P C BOARD ASSEMBLY ENGINEER DONOT SCALE THIS DRAWING SCAEFULL DATE I 19 99 DRAWNGNo 11130 2 APPROVED Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 repai
120. across from the display board 16 Replace the six phillips head screws and their washers from around the input power switch 12 Remove the display board Note Gentle prying from behind the board may be required 17 Using a 5 16 nut driver replace the four screws previously removed from the front of the machine lace the displ 13 Replace Mie display goang 18 Replace the case wraparound cover 14 Replace plugs 3 and 37 previously removed V350 PRO LINCOLN 5 F 61 F 61 TROUBLESHOOTING amp REPAIR MAIN SWITCH BOARD REMOVAL AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the main switch board for main tenance or replacement MATERIALS NEEDED 5 16 Nut Driver Flathead Screwdriver 7 16 mm Socket 3 16 Allen Wrench 3 8 Nut Driver This procedure tak
121. actory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the machine LINCOLN B V350 PRO G 17 SCHEMATIC MODE SELECT PRINTED CIRCUIT BOARD ELECTRICAL DIAGRAMS HC14A gt 100 54 10 D 15 5 100pF 1009 d D HC14A C6 21 100 5 6 STROBE 100V HC368A R24 1 2 5 HC14A E R23 hm LTSK _ C10 022 21 15 MB 50V 5SP 475 Cww 10 R18 mid 100 022 5 e LOCA 100pF 100V 55 7 R19 CONTROL I 12 js ia 8
122. ault to ON with or without a remote connected Types of Remote OUTPUT CONTROL The Invertec V350 Pro s Output Control can be controlled by either a potentiometer connected between 77 amp 75 with the wiper connected to 76 or a OV to 10V DC supply connected between 76 amp 75 76 needs to be positive 14 Pin Amphenol lead 75 is pin G lead 76 is pin F and lead 77 is pin E 6 Pin Amphenol lead 75 is pin C lead 76 is pin B and lead 77 is pin A Potentiometer Control The total resistance should be between 2000 ohms 2K and 10 000 ohms 10K The machine output will be at minimum when lead 76 wiper is at the end of the potentiometer that is connected to 75 The machine s output will increase as the wiper of the potentiometer is moved to the end that is connected to 77 Note In TIG mode moving the lead 76 wiper to lead 77 would produce the current that has been set by the Invertec V350 Pro s front panel Output Control Remotes of this type offered by Lincoln Electric are the K857 K812 and K870 Voltage Control The supply should be an isolated supply Not ref erenced to earth ground any auxiliary power from the Invertec V350 Pro or the welding output The supply should be capable of supplying at least 20mA 0 volts supplied to 76 will set the Invertec V350 Pro to minimum output for the mode that has been selected while 10 volts supplied to 76 will set the Invertec V350 Pro to the maximum output for the
123. by this manual 100K R65 2 00K A SUPPLY VOLTAGE NET O POWER SUPPLY SOURCE POINT 57 COMMON CONNECTION FRAME CONNECTION WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODE SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE NUMBER FILENAME L11487 1C THE LINCOLN ELECTRIC THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY EARTH GROUND CONNECTION THE LINCOLN ELECTRIC CO AND IS NOT TO BE REPRODUCED DISCLOSED OR USED WITHOUT THE EXPRESS PERMISSION OF SWITCH PCB SCHEMATIC SUBJECT 06 22 00 DATE THE LINCOLN ELECTRIC CO CLEVELAND OHIO U S A XM5626 UNLESS OTHERWISE SPECIFIED TOLERANCE 6 2 2000A DEGREE TO AGREE ON HOLES SIZES PER 2056 ON 2 PLACE DECIMALS 5 02 ON 3 PLACE DECIMALS 15 002 WITH PUBLISHED STANDARDS ON ALL ANGLES IS MATERIAL TOLERANCE 012 CNY17 3V EN 168 V350 PRO PC BOARD ASSEMBLY SWITCH ELECTRICAL DIAGRAMS ND 16 PLACES O 4 PLACES L s 05855 B Ta
124. ce Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the control board for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver 3 8 Nut Drive Flathead Screwdriver Phillips Head Screwdriver This procedure takes approximately 45 minutes to perform V350 PRO LINCOLN 5 F 52 F 52 TROUBLESHOOTING amp REPAIR CONTROL BOARD REMOVAL AND REPLACEMENT continued FIGURE F 16 CONTROL BOARD LOCATION Control Board PROCEDURE 1 Remove input power to the V350 PRO 5 2 Using a 5 16 nut driver remove the case wrap around cover 3 Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section 4 Locate the control board behind the front panel of 7 the machine See Figure F 16 Using a 5 16 nut driver remove the four screws from the top and bottom of the front of the machine See Figure F 17 Using a phillips head screwdriver remove the six screws and their washers from around the input power switch See Figure F 17 Using a phillips head screwdriver remove the four screws from around the two welder output termi nals on the front of the machine See Figure F 17 FIGURE F 17 CASE FRONT SCREW REMOVAL 5 16 Screws Qa a Welder Je 1 EM ron ud 5
125. ce before you proceed Call 1 800 833 9353 WELD DESCRIPTION This procedure will determine if the correct voltage is being applied to the primary of auxil iary transformer and also if the correct voltage is being induced on the secondary windings of the transformer MATERIALS NEEDED Volt ohmmeter Multimeter 5 16 Nut Driver Wiring Diagram This procedure takes approximately 25 minutes to perform V350 PRO LINCOLN 34 34 TROUBLESHOOTING amp REPAIR AUXILIARY TRANSFORMER TEST continued FIGURE F 8 Auxiliary Transformer Auxiliary Transformer Secondary Lead Plugs P52 and P56 TEST PROCEDURE 1 Remove input power to the V350 PRO 4 Locate the auxiliary transformer See Figure F 8 2 Using a 5 16 nut driver remove the case wraparound cover 5 Locate the secondary leads and plugs P52 and P56 See Figure F 8 and F 9 3 Perform the Input Capacitor Discharge Procedure detailed earlier in this section FIGURE F 9 Plug Lead Connections Viewed From Transformer Lead Side of Plug PLUG P52 PLUG P56 ee LEAD 31 LEAD 41A LEAD LEAD LEAD 532 LEAD 24 42 54 V350 PRO LINCOLN 35 LEAD IDENTIFICATION F 35 TROUBLESHOOTING amp REPAIR AUXILIARY TRANSFORMER NO 1 TEST continued TABLE F 4 NORMAL EXPECTED VOLTAGE 31 TO 532 115 VAC 42 TO 541 42 VAC 24 TO 541 24 VAC 54 TO 41A 28 VAC 7 Carefully apply the correct input voltage to the V350 PRO and check
126. ch These leads are 4X4 4X2 20 40 Note their positions for reassembly See Figure 4 Locate the output rectifier modules located behind F 38 the snubber board See figure F 38 7 Remove the copper plates from the tops of the modules FIGURE F 38 OUTPUT RECTIFIER MODULE LEAD LOCATIONS Lead 420 Lead 4X2 Lead 4 Lead 40 Snubber Board e al LEFT SIDE V350 PRO LINCOLN 5 87 10 11 12 87 TROUBLESHOOTING amp REPAIR OUTPUT RECTIFIER MODULES REMOVAL AND REPLACEMENT continued Under the copper plate previously removed there is an allen bolt Remove it using 9 64 allen wrench Using a 7 16 socket remove the mounting bolts at the top and bottom of the modules See Figure F 39 13 The screw threads may catch on the threads of the heat sink so be sure to get the face of the screw into contact with the surface of the module using just hand torque 14 Using a 7 16 socket tighten each mounting bolt to between 5 and 10 inch pounds 15 Tighten the center allen screw to between 12 and 18 inch pounds 16 Tighten each mounting bolt again 30 to 40 inch pounds this time 15 Replace leads 2X2 X4 20 40 to their original terminals in their proper positions Torque bolts to 30 40 Inch Pounds 16 Perform the Snubber Board Replacement Procedure detailed earlier in this section 17 Replace the case wraparound cover FIGURE F 39 OUTPUT R
127. ches and associated wiring See the wiring diagram 2 Perform the Input Rectifier 3 Perform the Main Switch Board Test 4 Perform the Output Diode Module Test 5 The Input Filter Capacitors may be faulty Check and if any are faulty replace all four CAUTION If for any reason you do not understand the test procedures or are unable to perform the test repairs safely con tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 8 5 F 5 TROUBLESHOOTING amp REPAIR TROUBLESHOOTING GUIDE PROBLEMS SYMPTOMS The V350 Pro does not have weld ing output The displays are lit Observe Safety Guidelines detailed in the beginning of this manual POSSIBLE AREAS OF MISADJ USTMENT S OUTPUT PROBLEMS 1 Make sure the reconnect switch is configured correctly for the input voltage applied Make sure the Weld Terminals Select is ON If the problem is solved the remote control device or associated circuitry may be faulty See the wiring diagram Put the Control Select in the Local position If the problem is solved the remote control device or associated circuitry may be faulty 4 If an error code is displayed see Fault Code Explanations RECOMMENDED COURSE OF ACTION 1 Check the reconnect switch and associated leads for loose or faulty connections See the wiring diagram
128. cing the rear of the machine Snubber Perform the Board Removal Remove leads 2 and 20 from the output diode module Remove leads 4 and 40 from the other output diode module 19 20 21 22 23 Using a 3 8 wrench remove the four mounting screws from the output diode heatsink assembly Take note placement of insulation for reassembly See Figure F 42 Cut any necessary cable ties and carefully remove the heavy lead from the diode heatsink Remove the output diode heatsink assembly through the rear of the machine Remove plug 90 from the current transducer Using a 3 8 nut driver remove the two mounting nuts from the current transducer FIGURE F 42 OUTPUT HEATSINK MOUNTING SCREW LOCATION FOUR 3 8 MOUNTING BOLTS LEFT SIDE V350 PRO LINCOLN 5 93 24 25 26 27 28 29 30 31 32 93 TROUBLESHOOTING amp REPAIR CURRENT TRANSDUCER REMOVAL AND REPLACEMENT continued Replace the current transducer 33 Replace the two 3 8 mounting nuts previously removed 34 Reconnect plug 90 to the current transducer Replace any necessary cable ties previously cut 35 Replace the output diode heatsink assembly pre viously removed using a 3 8 wrench 36 Note Be sure to place insulation in its original location 37 Replace leads 4X2 20 X4 40 previously removed from the two output diode modules 38 Torque to 30 40 inch 16 Perform the
129. d output terminals Select Weld Terminals ON and carefully check for 115VAC at plug J 22 pin 1 to J 22 pin 4 fan leads If the 115VAC is pre sent and the fan is not running then the fan motor may be faulty Also check the associat ed leads between plug J 22 and the fan motor for loose or faulty connections See the Wiring WARNING HIGH VOLTAGE IS PRESENT AT Diagram WARNING HIGH VOLTAGE IS THE SWITCH BOARD PRESENT AT THE SWITCH BOARD 3 Remove the input power to the V350 PRO 9 If the 115VAC is NOT present in the previous step then proceed to the fan control test Note me Tame OP mAy EE removal of the rear panel detailed in FAN CONTROL TEST PROCEDURE urrent Transducer Removal l Locate plug J 20 on the switch board Do not remove the plug from the switch board See 4 Replace the case wrap around cover Figure F 12 and Figure F 14 FIGURE F 14 PLUG J20 Lead 716 Lead 7154 Plug J20 V350 PRO LINCOLN 5 44 44 NOTES V350 PRO LINCOLN 5 45 45 TROUBLESHOOTING AND REPAIR SPI CABLE RESISTANCE AND VOLTAGE TEST WARNING 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 electrical shock please observe all safety notes and precautions detailed through
130. der Connect the work cable to the terminal of the welder NOTE Figure C 7 shows the electrode connected for positive polarity To change polarity shut the welder off and reverse the electrode and work cables at the output terminals NOTE Welding cable must be sized for current and duty cycle of application Connect K591 control cable to the 24 42VAC 14 pin amphenol on the back of the V350 PRO and the input cable plug on the LN 742 Set the VOLTMETER switch to or depending on the polarity chosen Set the MODE to the CV WIRE position Set CONTROL SELECT to LOCAL Place the WELD TERMINALS SELECT in the REMOTE position Adjust wire feed speed at the LN 742 Set the control at 0 initially and adjust to Suit Figure C 7 V350 PRO LN 742 Connection Diagram 14 PIN AMPHENOL 24 42VAC AT REAR OF MACHINE V350 PRO TO WORK TO LN 742 INPUT CABLE PLUG K591 CONTROL CABLE ELECTRODE CABLE TO WIRE FEED UNIT LINCOLN 5 C 9 C 9 ACCESSORIES CONNECTION OF THE LN 10 TO THE V350 PRO USING THE K1505 CONTROL CABLE NOTE AN LN 10 CAN ONLY BE USED WITH A FAC TORY OR VERSION OF THE V350 PRO 1 Remove input power to the V350 PRO 2 Connect the K1505 control cable from the LN 10 to the Invertec 24 42VAC 14 pin amphenol con necter on the rear of the V350 PRO 3 Connectthe electrode cable to the output terminal of
131. e machine Reset is tripped The wire feeder or control cable may be faulty A CAUTION 1 Perform eA an 2 Check the leads between the 14 pin amphenol type plugs and the auxiliary transformer for loose or faulty connections If for any reason you do not understand the test procedures or are unable to perform the test repairs safely con tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 5 TROUBLESHOOTING amp REPAIR Observe Safety Guidelines detailed in the beginning of this manual PROBLEMS SYMPTOMS The machine s welding output is very high and uncontrollable POSSIBLE AREAS OF MISADJ USTMENT S FUNCTION PROBLEMS Put the Control Select in the Local position If the problem is solved the remote control device or associated circuitry may be faulty TROUBLESHOOTING GUIDE RECOMMENDED COURSE OF ACTION 1 Perform the Current Transducer Test 2 If the output is normal when the Control Select is in the Local position but the output is very high in the Remote position the remote board may be faulty Perform The SPI Cable Resistance and Voltage 3 The control board may be faulty The Weld Mode Select does not function properly 1 Refer to Operation Section of this manual for normal operation characteristics 1 Check for loose or faulty plug connections between the c
132. e output power is minimized MAXIMUM OUTPUT By holding the gate signal on for 24 microseconds each and allowing only two microseconds of dwell time off time during the 50 microsecond cycle the output is maximized The darkened area under the top curve can be compared to the area under the bottom curve The more dark area that is under the curve indi cates that more power is present IGBT primary lan IGBT modules winding group consists of two feeding one transformer V350 PRO LINCOLN 5 Section F 1 TABLE OF CONTENTS TROUBLESHOOTING amp REPAIR SECTION Troubleshooting amp Repair 224 41 Section F How to Use Troubleshooting Guide eee F 2 PC Board Troubleshooting Procedures and Replacement F 3 Troubleshooting Guide rete pendet t e oe i e ERR EAR re re Ra Le e F 4 Test Procedures Input Filter Capacitor Discharge Procedure mmm F 15 Main Switch Board Test ose e e en d i e RE Ra E DR LA ER F 17 InputiRectifler Test eb ce e aad F 21 Power Board Test cci eee er i a ne e ey EE iaa Ea ies F 25 Output Diode Modules F 29 Auxiliary Transformer lest nde oe n ea A Loci oua F 33 Current Transducer nennen nennen enn nennen nennen nene F 37 Fan Control and Motor Test i
133. ead and understand the following safety highlights For additional safety information it is strongly recommended that you purchase a copy of Safety in Welding amp Cutting ANSI Standard Z49 1 from the American Welding Society Box 351040 Miami Florida 33135 or CSA Standard W117 2 1974 A Free copy of Arc Welding Safety booklet E205 is available from the Lincoln Electric Company 22801 St Clair Avenue Cleveland Ohio 44117 1199 BE SURE THAT ALL INSTALLATION OPERATION MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS powered equipment 1 Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running 1 h To avoid scalding do not remove the radiator pressure cap when the engine is hot 1 b Operate engines in open well ventilated areas or vent the engine exhaust fumes outdoors ELECTRIC AND MAGNETIC FIELDS 3 S may be dangerous 2 a Electric current flowing through any conductor causes localized Electric and Magnetic Fields EMF Welding current creates EMF fields around welding cables and welding machines 1 c Do not add the fuel near an open flame weld ing arc or when the engine is running Stop the engine and allow it to cool before refuel ing to prevent spilled fuel from vaporizing on contact with hot engine parts and igniting Do not spill fuel when f
134. em lower is under voltage switches are configured for the input voltage being applied to the machine The machine is self clearing when condition ceases with the V F signals from the main switch board to the control board Perform the Main Switch Board Test Perform the Power The control board may be faulty NOTE more than one fault message is being displayed perform all the checks for the faults before replacing the printed circuit board V350 PRO LINCOLN 5 10 TROUBLESHOOTING amp REPAIR F 10 FAULT CODES DESCRIPTION CORRECTIVE SERVICE FACILITY CORRECTIVE DEFINITION ACTION ACTION 33 Capacitor bank Make sure the reconnect There may bea problem B upper is under switches are configured with the V F signals from voltage for the input voltage the main switch board to being applied to the the control board machine The machine is self clearing when Perform the Main Switch condition ceases Perform the Power The control board may be faulty 34 Capacitor bank Make sure the reconnect There may bea problem A lower is over voltage switches are configured for the input voltage being applied to the machine The machine is self clearing when condition ceases with the V F signals from the main switch board to the control board Perform the Main Switch Board Test Perform the Power Board Test The control board may be faulty NOTE If m
135. ematic drawing The resistance reading pin to corresponding pin should be zero ohms or very low resis tance f the resistance reading is high or open check the plug connections to the SPI network PC boards If the connections are OK and the resistance is high or open the SPI cable may be faulty 9 10 11 12 13 14 15 16 17 18 19 Using the ohmmeter check the continuity of the remote board SPI cable from the plug pre viously connected to the display board to the plug on the remote board Reconnect the plugs into the display board and perform the Display Board Replacement With plug 3 still removed from the control board carefully apply the correct input power to V350 PRO Turn on the machine Carefully check for the presence of 15VDC from plug J 3 pin 1 to plug J 3 pin 10 at the control board receptacle See Figure F 15 Carefully check for the presence of 5VDC from plug J 3 pin 2 to plug J 3 pin 10 at the control board receptacle See Figure F 15 If either of these voltages are low or not pre sent the control board may be faulty Replace Remove the input power to the V350 PRO machine Replace plug J 3 into the control board Replace the control box top and any cable ties previously removed Replace the case wrap around cover FIGURE F 15 Plug J 3 Pin 1 Pin 2 Plug J3 DOO Oo OO 10 V350 PRO LINCOLN 5
136. en the control board 8 and the current transducer 90 See The Wiring Diagram For access to plug J 90 and the current transducer refer to Current 12 Remove input power to the V350 PRO 13 Replace the control box top and any cable ties previously removed 14 Install the case wraparound cover using the 5 16 nut driver V350 PRO LINCOLN 5 40 40 NOTES V350 PRO LINCOLN 5 F 41 F 41 TROUBLESHOOTING AND REPAIR FAN CONTROL AND MOTOR TEST WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if the fan motor control board switch board or associated leads and connectors are functioning correctly MATERIALS NEEDED Voltmeter 5 16 Nut Driver This procedure takes approximately 40 minutes to perform V350 PRO LINCOLN 5 42 42 TROUBLESHOOTING AND REPAIR FAN CONTROL AND MOTOR
137. er modes For the Construction version all modes ON For the Factory version STICK ON TIG and CV ON or REMOTE depending if remote output controls are connected to the machine V350 PRO LINCOLN 5 3 3 OPERATION For both the Construction and Factory versions these trigger modes can be over ridden switched with the WELD TERMINALS push button When changed the unit will power up in the configuration it was in when it was last powered down 5 THERMAL This status light indicates when the power source has been driven into thermal overload If the output terminals were ON the ON light will blink indi cating that the output will be turned back on once the unit cools down to an acceptable temperature level If the unit was operating in the REMOTE mode the trigger will need to be opened before or after the thermal has cleared and closed after the machine has cooled down to an acceptable temper ature to establish output 6 CONTROL REMOTE LOCAL Two status lights indicate the location of output control as pre determined by the power sources auto configure system The LOCAL display will be lit when control is at the power source The REMOTE display will be lit when a remote pot control is detected These Output Control configurations can be overrid den switched with the CONTROL push button When changed the unit will power up in the configu ration it was in when it was last powered dow
138. ere nr dee i bid Led nando F 41 SPI Cable Resistance and Voltage Test emen F 45 Voltage and Current Calibration meme F 47 Replacement Procedures Control Board Removal and Replacement eme F 51 Display Board Removal and Replacement s sese ees F 57 Main Switch Board Removal and F 61 Mode Board Removal and 2 F 65 Status Board Removal and 2 emen F 71 Snubber Board Removal and F 75 Power Board Removal and 77 Input Rectifier Removal and 0 1 0 0 81 Output Rectifier Modules Removal and F 85 Current Transducer Removal and F 89 Retest after Et Roe ERO c EHE e D E Dee deu F 94 V350 PRO LINCOLN Section F 1 TROUBLESHOOTING amp REPAIR HOW TO USE TROUBLESHOOTING GUIDE CAUTION Service and repair should be performed by only Lincoln Electric Factory Trained Personnel Unauthorized repairs performed on
139. erformed 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the mode board for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver Small Flathead Screwdriver Phillips Head Screwdriver 1 4 Wrench This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 F 66 F 66 TROUBLESHOOTING amp REPAIR MODE BOARD REMOVAL AND REPLACEMENT continued FIGURE F 26 MODE BOARD LOCATION Display Board Status Board Mode Board PROCEDURE 3 Perform the Input Filter Capacitor 1 Remove input power to the V350 PRO Discharge Procedure detailed earlier in this section 2 Using a 5 16 nut driver remove the case wraparound cover 4 Locate the mode board behind the front panel of the machine See Figure F 26 V350 PRO LINCOLN 5 67 67 TROUBLESHOOTING amp REPAIR MODE BOARD REMOVAL AND REPLACEMENT continued FIGURE F 27 CASE FRONT SCREW REMOV
140. es approximately 35 minutes to perform V350 PRO LINCOLN 5 F 62 F 62 TROUBLESHOOTING amp REPAIR MAIN SWITCH BOARD REMOVAL amp REPLACEMENT continued FIGURE F 23 MAIN SWITCH BOARD LEAD LOCATIONS PROCEDURE 1 Remove the input power to the V350 PRO 5 Using a 5 16 and 3 8 nut driver remove the input lead shield from the area at the bottom of 2 Using a 5 16 nut driver remove the case wrap the main switch board around cover Using a 7 16 socket remove leads 201 202 6 3 Perform the Input Filter Capacitor Discharge 203 204 205 206 207 208 209 from the Procedure detailed earlier in this section switch board Note lead terminals locations and washer positions upon removal 7 Locate and disconnect the three harness plugs associated with the main switch board Plugs A CAUTION 3 20 21 4 22 See Figure F 23 Observe static precautions detailed in PC Board Locate the eight capacitor terminals and Troubleshooting Procedures at the beginning of remove the nuts using a 7 16 socket or nut this section Failure to do so can result in perma driver Note the position of the washers behind nent damage to equipment each nut for replacement 4 Locate the main switch board and all associat ed plug and lead connections See figure F 23 See Wiring Diagram V350 PRO LINCOLN 5 63 9 10 11 12 TROUBLESHOOTING amp REPAIR MAIN SWITCH BOARD REMOVAL amp REPLACEMENT co
141. etermine the location of trigger and output control Modular options for easy upgrades Back lit Status Lights for improved error communi cation Circuit Breaker Input Switch F A N fan as needed Cooling fan runs only when necessary Thermostatically protected Designed to the IEC 974 1 Standard P23S protection rating with potted PC boards for enhanced ruggedness reliability Modular construction for easy servicing Aluminum Chassis and Wraparound 10 Ft Power Cord included V350 PRO LINCOLN 5 B 6 OPERATION Auxiliary Power 115VAC 42VAC and 24VAC power is available from the two 14 pin amphenols on the rear of the unit K1728 2 Construction model of the Invertec V350 Pro does not have the amphenols These supplies are intended to supply power for auxiliary equipment like wire feeders and the TIG Module 115VAC supply is rated at 2 amps and is protected by a 2 5 amp breaker located by the amphenol 42 VAC supply is rated at 5 5 amps and is protect ed by a 6 amp breaker located by the amphenol 24 VAC supply is rated at 5 5 amps and is protect ed by a 6 amp breaker located by the amphenol Limitations The V350 Pro is not recommended for processes other than those listed The V350 Pro can only be used with the recom mended equipment and options Recommended Processes Properly equipped the Invertec V350 Pro supports GMAW FCAW SMAW GTAW and CAC A processes for a variety of
142. figuration to accommodate the applied input voltage During the precharge time the DC input voltage is applied to the input capacitors through a current limit ing circuit The input capacitors are charged slowly and current limited voltage to frequency converter circuit located on the switch board monitors the capacitor voltages This signal is coupled to the con trol board When the input capacitors have charged to an acceptable level the control board energizes the input relays that are located on the switch board making all of the input power without current limiting available to the input capacitors If the capacitors become under or over voltage the control board will de energize the input relays and the V350 output will be disabled Other possible faults may also cause the input relays to drop out NOTE Unshaded areas of Block Logic Diagram are the subject of discussion V350 PRO LINCOLN 5 E 3 E 3 THEORY OF OPERATION FIGURE E 3 SWITCH BOARD amp MAIN TRANSFORMER Main Switch Board Input VA Rectifier Input switch amp 100A Breaker Reconnect gt Switch Machine Control Supply 15VDC 15VDC 6VDC Power Board riman ens or To Control xoeqpsej amp queuing Positive Output Terminal Negative Output Terminal Output Voltage Sense Control Board
143. for the correct sec ondary voltages per table F 4 Make sure the reconnect jumper lead and switch are config ured correctly for the input voltage being applied Make sure circuit breaker CB2 is functioning properly NOTE The secondary voltages will vary if the input line voltage varies If the correct secondary voltages are present the auxiliary transformer is functioning proper ly If any of the secondary voltages are miss ing or low check to make certain the primary is configured correctly for the input voltage applied See Wiring Diagram WARNING High voltage is present at primary of Auxiliary Transformer 9 f the correct input voltage is applied to the primary and the secondary voltage s are not correct the auxiliary transformer may be faulty 10 Remove the input power to the V350 PRO 11 Install the case wraparound cover using a 5 16 nut driver V350 PRO LINCOLN 5 F 36 F 36 NOTES V350 PRO LINCOLN 5 37 37 TROUBLESHOOTING AND REPAIR CURRENT TRANSDUCER TEST WARNING 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 electrical shock please observe all safety notes and precautions detailed throughout this manual If for any reason you do not understand the
144. g cable must be sized for current and duty cycle of the application 3 Attach the single lead from the LN 25 control box to the work using the spring clip on the end of the lead This is only a control lead it carries no welding current 4 Set the voltmeter switch to the electrode polarity chosen 5 Set CONTROL SELECT to REMOTE 6 Set the MODE to the CV WIRE position 7 Set WELD TERMINALS SELECT to the ON position If you are using an LN 25 without an internal con tactor the electrode will be HOT when the V350 PRO is energized 8 Set the ARC CONTROL to the O position and then adjust to suit Figure 1 V350 PRO LN 25 ACROSS THE ARC CONNECTION DIAGRAM 6 pin Amphenol Optional K444 1 Remote Control LN 25 Wire Feeder Work Clip Lead To Work Electrode Cable NOTE lllustation shows electrode connected for negative polarity V350 PRO LINCOLN 5 C 3 C 3 ACCESSORIES CONNECTION OF THE LN 25 TO THE V350 PRO ACROSS THE ARC WITH OPTIONAL 6 PIN K857 REMOTE CON TROL 1 2 Remove input power to the V350 PRO Connect the electrode cable to the output terminal of polarity required by the electrode Connect the work lead to the other terminal Welding cable must be sized for current and duty cycle of the application Connect the K857 remote control to the 6 pin amphenol on the V350 PRO Attach the single lead from the LN
145. he display board behind the front panel of the machine See Figure F 21 V350 PRO LINCOLN 5 59 TROUBLESHOOTING amp REPAIR FIGURE F 22 CASE FRONT SCREW LOCATION 5 16 Screws Welder Output Terminal Screws Input Power gt Switch Screws 5 16 Screws 5 Using a 5 16 nut driver remove the four screws from the top and bottom of the front of the machine See Figure F 22 Using a phillips head screwdriver remove the six screws and their washers from around the input power switch See Figure F 22 Using a phillips head screwdriver remove the four screws from around the two welder out put terminals on the front of the machine See Figure F 22 V350 PRO 8 The front of the machine may now gently be pulled forward to gain access to the display Board Note The front of the machine cannot be removed completely only pulled forward a few inches The display board is now accessible to replace LINCOLN 5 F 60 F 60 TROUBLESHOOTING amp REPAIR DISPLAY BOARD REMOVAL amp REPLACEMENT continued 10 Remove plug 37 from the display board 15 Replace the four phillips head screws removed from the front of the machine located around the 11 Remove plug 3 originating from the control two welder output terminals board located directly
146. head Screwdriver Phillips Head Screwdriver This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 F 72 F 72 TROUBLESHOOTING amp REPAIR STATUS BOARD REMOVAL AND REPLACEMENT continued PROCEDURE 3 Perform the Input Filter Capacitor 1 Remove input power to the V350 PRO Discharge Procedure detailed earlier in this section 2 Using a 5 16 nut driver remove the case wraparound cover 4 Locate the status board behind the front panel of the machine See Figure F 30 FIGURE F 30 STATUS BOARD LOCATION Display Board Status Board V350 PRO LINCOLN 5 F 73 F 73 TROUBLESHOOTING amp REPAIR STATUS BOARD REMOVAL AND REPLACEMENT continued 5 Using a 5 16 nut driver remove the four screws from the top and bottom of the front of the machine See Figure F 31 6 Using a phillips head screwdriver remove the six screws and their washers from around the input power switch See Figure F 31 7 Using a phillips head screwdriver remove the four screws from around the two welder output termi nals on the front of the machine See Figure F 31 8 The front of the machine may now gently be pulled forward to gain access to the status Board Note The front of the machine cannot be removed completely only pulled forward a few inches 9 The status board is now accessible to replace FIGURE F 31 FRONT SCREW REMOVAL 5 16 Screws
147. her electrically hot parts to touch a cylinder Keep your head and face away from the cylinder valve outlet when opening the cylinder valve Valve protection caps should always be in place and hand tight except when the cylinder is in use or connected for use Read and follow the instructions on compressed gas cylinders associated equipment and CGA publication Precautions for Safe Handling of Compressed Gases in Cylinders available from the Compressed Gas Association 1235 Jefferson Davis Highway Arlington VA 22202 FOR ELECTRICALLY powered equipment 8 a Turn off input power using the disconnect switch at the fuse box before working on the equipment Install equipment in accordance with the U S National Electrical Code all local codes and the manufacturer s recommendations Ground the equipment in accordance with the U S National Electrical Code and the manufacturer s recommendations Mar 95 LINCOLN 5 SAFETY PR CAUTIONS DE S RET Pour votre propre protection lire et observer toutes les instructions et les pr cautions de s ret specifiques qui parraissent dans manuel aussi bien que les pr cautions de s ret g n rales suiv antes S ret Pour Soudage A L Arc Protegez vous contre la secousse lectrique a Les circuits l lectrode et la pi ce sont sous tension quand la machine souder est en marche Eviter toujours tout contact entre le
148. ht Information Voltage Amps Volts Duty Cycle ing with Cord K1728 1 200 230 200 230 350A 34V 60 Factory Factory 275A 31V 100 82 5lbs 14 7 x12 5 x Invertec 37 4 kg 27 8 V350 K1728 2 373x318x PRO Construction 60 50 Hz 5 425 Construction 706 mm 60 50 Hz 81 5lbs 208 230 350A 34V 60 36 9 kg Includes K1728 3 415 handles CE 460 480 275A 31V 100 575 1 Phase Overall Length Including Handle 27 8 706mm without handle V350 PRO INPUT CURRENT Recommended Fuse Sizes Based On The U S National Electrical Code And Maximum Machine Outputs Input 50 60 Hz Output Recommended Voltage Phases 275Amps 350Amps Line Cord Size Fuse Size Notes 31 Volts 100 34Volts 60 208 230 415 460 575 200 208 230 380 400 415 125A Note 1 125A Note 1 80A Note 1 70A 50A 80A Note 1 80A Note 1 70A 50A 50A 50A 460 50A 575 35A 1 When operating on these inputs the line cord should be changed to an input conductor of 6 AWG or larger HHH FP OUTPUT CABLES CONNECTIONS AND LIMITATIONS Select the output cable size based upon the following chart Cable sizes for Combined Length of Electrode and Work Cable Copper 75C rated DUTY CYCLE CURRENT LENGTH UP 61m 200 FT 61 76m 200 250 FT 100 275 1 0 1 0 60 350 1 0 2 0 LINCOLN 5 A 3 INSTALLATION INSTALL
149. illing tank If fuel is spilled wipe it up and do not start engine until fumes have been eliminated EMF fields may interfere with some pacemakers and welders having a pacemaker should consult their physician before welding 1 d Keep all equipment safety guards covers and devices in posi tion and in good repair Keep hands hair clothing and tools away from V belts gears fans and all other moving parts when starting operating or repairing equipment Exposure to EMF fields in welding may have other health effects which are now not known All welders should use the following procedures in order to 1 e In some cases it may be necessary to remove safety mo Eds minimize exposure to EMF fields from the welding circuit guards to perform required maintenance Remove guards only when necessary and replace them when the maintenance requiring their removal is complete Always use the greatest care when working near moving parts 2 d 1 Route the electrode and work cables together Secure them with tape when possible 2 4 2 Never coil the electrode lead around your 1 f Do not put your hands near the engine fan m Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running 2 d 3 Do not place your body between the electrode and work cables If the electrode cable is on your right side the work cable should also
150. ing or welding They may explode Sparks and spatter are thrown from the welding arc Wear oil free protective garments such as leather gloves heavy shirt cuffless trousers high shoes and a cap over your hair Wear ear plugs when welding out of position or in confined places Always wear safety glasses with side shields when in a welding area Connect the work cable to the work as close to the welding area as practical Work cables connected to the building framework or other locations away from the welding area increase the possibility of the welding current passing through lifting chains crane cables or other alternate circuits This can create fire hazards or overheat lifting chains or cables until they fail 6 h Also see item 1 c xal CYLINDER may explode is if damaged 7 Use only compressed gas cylinders containing the correct shielding gas for the process used and properly operating regulators designed for the gas and pressure used All hoses fittings etc should be suitable for the application and maintained in good condition Always keep cylinders in an upright position securely chained to an undercarriage or fixed support Oylinders should be located Away from areas where they may be struck or subjected to physical damage safe distance from arc welding or cutting operations and any other source of heat sparks or flame Never allow the electrode electrode holder or any ot
151. ite leads to power 3 Wrap red lead with tape to provide 600V insulation Three Phase Input 1 Connect green lead to ground per U S National Electric Code 2 Connect black red and white leads to power Install in accordance with all local and national electric codes PARALLEL OPERATION The V350 Pro are operable in parallel in CC mode For best results the currents of each machine should be reasonably well shared As an example with two machines set up in parallel for a 400 amp procedure each machine should be set to deliver approximately 200 amps not 300 amps from one and 100 amps from the other This will minimize nuisance shutdown conditions In general more than two machines in parallel will not be effective due to the voltage requirements of procedures in that power range To set machine outputs start with output control pots and arc control pots in identical positions Use the output control pots to balance the currents and main tain the desired voltage or current The arc control pots should be kept identical on the two machines QUICK DISCONNECT PLUGS A quick disconnect system is used for the welding cable connections The welding plug included with the machine is designed to accept a welding cable size of 1 0 to 2 0 1 Remote 25mm 1 in of welding cable insulation 2 Slide rubber boot onto cable end The boot end may be trimmed to match the cable diameter Soap or other lubricant will help to slide the b
152. leshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if any of the output diodes are shorted MATERIALS NEEDED Analog Voltmeter Ohmmeter Wiring Diagram This procedure takes approximately 20 minutes to perform V350 PRO LINCOLN 5 F 30 F 30 TROUBLESHOOTING amp REPAIR OUTPUT DIODE MODULES TEST continued FIGURE F 5 Machine Output Terminals NEGATIVE POSITIVE OUTPUT OUTPUT TERMINAL TERMINAL TEST PROCEDURE 4 Using the analog ohmmeter test for more 1 Remove input power to the V350 PRO Us than 200 ohms resistance between positive 2 Locate the output terminals on the front and negative output terminals Positive test panel of the machine See Figure F 5 lead to the positive terminal Negative test 3 Remove any output cables and load from the lead to the negative terminal output terminals NOTE The polarity of the test leads is most important If the test leads polarity is not cor rect the test will have erroneous results V350 PRO LINCOLN 5 TROUBLESHOOTING amp REPAIR OUTPUT DIODE MODULES TEST continued Figure F 6 Terminal Close Up If 200 ohms is measured then the output diodes are not shorted NOTE There is a 200 ohm resistor ac
153. lug 801 804 O 9 9 O k Plug J8 V350 PRO LINCOLN 5 39 9 10 39 TROUBLESHOOTING AND REPAIR CURRENT TRANSDUCER TEST continued TABLE F 5 EXPECTED TRANSDUCER FEEDBACK OUTPUT LOAD CURRENT VOLTAGE Check the feedback voltage from the current transducer using a resistive load bank and with the V350 PRO in mode 200 Mode 200 is a constant current test mode This mode can be accessed from the front panel of the V350 by pressing and holding the Mode Select but ton while turning the machine on Then rotate the output knob while still holding the Mode Select button in until the displays read Mode 200 Release the Mode Select Button and the machine will be in mode 200 With the V350 PRO in mode 200 apply the grid load across the output of the V350 PRO set machine output to 300 amps and enable WELD TERMINALS Adjust the grid load to obtain 300 amps on the external ammeter and check feedback voltages per Table F 5 A Pin 1 lead 801 to Pin 6 lead 806 should read 2 4 VDC machine loaded to 300 amps If for any reason the machine cannot be loaded to 300 amps Table F 5 shows what feedback voltage is produced at various cur rent loads 11 If the correct supply voltages are applied to the current transducer and with the machine loaded the feedback voltage is missing or not correct the current transducer may be faulty Before replacing the current transducer check the leads and plugs betwe
154. m is grounded correctly The machine is self clearing when There may be a problem condition ceases with the primary current sensors CT located on the main switch board See the wiring diagram The control board may be faulty 43 Capacitor banks A Make sure the recon There may be a problem lower and nect switches are con with the V F signals from are not balanced figured for the input the main switch board to voltage being applied to the control board the machine The machine is self clearing Perform the Main Switch when condition ceases The capacitor s may be faulty Check and replace if necessary 44 The machine has Make sure the V350 Pro Perform the Power detected a fault in the is grounded correctly central processing unit CPU The machine is self clearing when condition ceases The control board or associated wiring may be faulty See the wiring diagram NOTE more than one fault message is being displayed perform all the checks for the faults before replacing the printed circuit board V350 PRO LINCOLN 5 13 TROUBLESHOOTING amp REPAIR F 13 FAULT CODES DESCRIPTION CORRECTIVE SERVICE FACILITY RRECTIVE DEFINITION ACTION 47 Electrical glitch on the Possibly caused by an There may be a problem V F signals from the main switch board to the control board external electrical noise or signal level
155. mal Protection ER e GE Gba ied eed cdd e abe dia o da been D 3 Major Component Locations nennen enne nennen nennen D 4 V350 PRO LINCOLN 5 MAINTENANCE WARNING Have qualified personnel do the maintenance work Always use the greatest care when working near moving parts Do not put your hands near the cooling blower fan problem cannot be corrected by following the instructions take the machine to the nearest Lincoln Field Service Shop 0 ELECTRIC SHOCK can kill Do not touch electrically live parts or electrode with skin or wet clothing e insulate yourself from work and ground Always wear dry insulating gloves ad oa EXPLODING PARTS can cause injury Failed parts can explode or cause other parts to explode when power is applied Always wear a face shield and long sleeves when ser vicing See additional warning information throughout this operators manual INPUT FILTER CAPACITOR DISCHARGE PROCEDURE 1 Remove the input power to the V350 PRO 2 Using the 5 16 wrench remove the screws from the case wraparound cover 3 Becareful not to make contact with the capacitor terminals located at the top and bottom of the switch board 4 Obtain a high resistance and high wattage resis tor 25 1000 ohms and 25 watts minimum This resistor is not with the machine NEVER USE A SHORTING STRAP FOR THIS PROCEDURE FIGURE D 1 LOCATION OF INPUT FIL
156. materials including mild steel stainless steel cored wires and aluminum V350 PRO LINCOLN 5 C 1 TABLE OF CONTENTS ACCESSORIES SECTION eed a on Ea P dtp Section C Connection of Lincoln Electric Wire eem C 2 Thru C 9 V350 PRO LN 25 with Optional 6 Pin 441 1 C 2 V350 PRO LN 25 with Optional 6 Pin K857 C 3 LN 25 with K431 Remote Option eee eene nennen nnn nnns C 4 V350 PRO LN 25 with K867 Adapter eee cnet emen C 5 V350 PRO LN 7 with K480 Control 2222 C 6 V350 PRO LN 7 with K867 emen C 7 V350 P RO EN 742 it metas rtp ate tha terea Gee einen Eve eU Ute ren rune fuc C 8 V350 PRO LN 10 with K1505 Control 2222 C 9 p rh al P ERR RE RR ERR ERR C 10 Options Accessories cioe Here ice p pere Per e e Ced e e E cg C 10 V350 PRO LINCOLN 5 2 2 ACCESSORIES CONNECTION OF LINCOLN ELEC TRIC WIRE FEEDERS CONNECTION OF THE LN 25 TO THE V350 PRO ACROSS THE ARC WITH OPTIONAL 6 PIN K441 1 REMOTE CON TROL 1 Remove input power to the V350 PRO 2 Connect the electrode cable to the output terminal of polarity required by the electrode Connect the work lead to the other terminal Weldin
157. mode Note In TIG mode 10 volts supplied to lead 76 would produce the current that has been The Invertec V350 Pro s Weld Terminals can be controlled from each of the amphenol connectors The circuit has a nominal OCV of 15VDC and requires a dry contact closure less than 100 ohms to activate the output of the Invertec V350 Pro 14 Pin Amphenols the Weld Terminals are controlled from pins C lead 2 and pin D lead 4 Pin C is positive 6 Pin Amphenol the Weld Terminals are controlled from pin D lead 2 and pin E lead 4 In the 6 pin amphenol pin D is positive DESIGN FEATURES and ADVANTAGES Multiple process DC output range 5 425 amps Pre settable welding outputs Built in Line Voltage Compensation holds the output constant over 10 input fluctuations State of the art inverter technology yields high power efficiency excellent welding performance lightweight and compact design Utilizes microprocessor control Electronic over current protection Input over voltage protection Manual reconnect switch located on the back panel with a clear reconnect door to allow easy determi nation of input configuration The reconnect door is fastened with turn connectors that allow quick and easy access to the reconnect area Circuit breaker protected auxiliary System Self Configure The power source ana lyzes the remote controls connected to the amphe nols and the desired welding mode to properly d
158. n Hidden Middle Control Panel Process Set Up Panel The middle control panel is removable to allow for upgrades see Field Installed Options Accessories Additionally this panel is hidden by an access door to reduce appeared complexity and provide protection to the controls 7 WELD MODE SELECT The Mode Control button selects the following weld ing modes desired CC STICK SOFT The Stick Soft process features continuous control ranging from 5 to 425 amps This mode was intended for most SMAW applications and Arc Gouging Arc Gouging Setting the output of the Stick Soft mode to 425 amps will enable the arc gouging mode The actual output current will depend on the size of carbon used The recommended maxi mum size carbon is 5 16 The Hot Start control regulates the starting current at arc initiation Hot Start can be adjusted from minimum 0 with no additional current added at arc start to maximum 10 with double the preset current or 425 amps max of machine added for the first second after arc initiation The Arc Control regulates the Arc Force to adjust the short circuit current The minimum setting 10 will produce a soft arc and will produce minimal spatter The maximum setting 10 will produce a crisp arc and will minimize electrode sticking CC STICK CRISP The Stick Crisp mode features continuous control from 5 to 425 amps This mode was intended primarily for pipe welding applications
159. noid flow through the main transformer primaries and the offset timing of the IGBT switching circuits induce an AC square wave output signal at the secondary of the main transformer The two current transformers CT located on the switch board monitor these primary currents the primary currents become abnormally high the control board will shut off the IGBTs thus dis abling the machine output The DC current flow through each primary winding is clamped back to each respective input capacitor when the IGBTs are turned off This is needed due to the inductance of the transformer primary winding The firing of the two switch boards occurs during halves of a 50 microsec ond interval creating a constant 20 KHZ output In some low open circuit Tig modes the firing frequency is reduced to 5KHZ The Invertec V350 Pro has a F A N fan as needed cir cuit The fan operates when the welding output ter minals are energized or when a thermal over tempera ture condition exists Once the fan is activated it will remain on for a minimum of five minutes The fan dri ver circuit is housed on the switch board but it is acti vated from a control board signal NOTE Unshaded areas of Block Logic Diagram are the subject of discussion V350 PRO LINCOLN 5 4 4 THEORY OF OPERATION FIGURE E 4 POWER BOARD CONTROL BOARD AND SERIAL PERIPHERAL INTERFACE SPI COMMUNICATIONS Main Switch Board To C
160. ntinued FIGURE F 24 3 16 ALLEN BOLT LOCATION Using a 3 16 allen wrench remove four allen bolts and washers as shown in Figure F 24 Atthis point the board is ready for removal Carefully remove the board from the 4 nylon mounting pins Note Depress the retaining pins on the sides of the nylon mounts to release the board See Figure F 25 Carefully maneuver the board out of the machine Apply a thin coat of Penetrox A 13 to the IGBT heatsinks on the back of the new switch boards mating surfaces Note Keep compound away from the mounting holes Mount the new board on the nylon mount ing pins 13 14 15 16 17 18 Replace the four allen bolts and washers previously removed Replace the eight capacitor terminal nuts washers and necessary leads previously removed Reconnectthe three harness plugs previous ly removed Reconnect the nine leads 2201 3209 that were previously removed Pre torque all screws to 25 inch lbs before tightening to 44 inch Ibs Replace the case wraparound cover FIGURE F 25 NYLON MOUNTING PIN DEPRESS LOCKING TAB ON MOUNTING PIN V350 PRO LINCOLN 5 F 63 64 64 NOTES V350 PRO LINCOLN 5 F 65 F 65 TROUBLESHOOTING amp REPAIR MODE BOARD REMOVAL AND REPLACEMENT WARNING Service and repair should be performed by only Lincoln Electric factory trained personnel Unauthorized repairs p
161. ntrol OPERATION idi The Hot Start control is not used in the CV FLUX CORED mode The Arc Control regulates pinch effect At the mini mum setting 10 minimizes pinch and results in a soft arc At the maximum setting 10 maximizes pinch effect and results in a crisp arc Most self shielded wires work well at an Arc Control setting of 5 8 HOT START and ARC CONTROL features have different functions depending on the welding Mode that is active Each feature is described under the welding mode heading See Item 7 for specified Mode Operation LOWER CASE FRONT The output studs line switch and remote connector are located on the lower case front 9 Both STUDS contain Twist Mate connector inserts The Negative stud is configured to accept the pass through gas system 10 The ON OFF switch is a 3 phase circuit breaker rated at 100 amps per leg 11 The METER POLARITY switch is located above the output connectors The switch provides a work connection for wire feeder voltmeters Place the switch in the position of the electrode polarity indicated by the decal The switch does not change the welding polarity 12 6 PIN AMPENOL for remote control REMOTE CONTROL of the OUTPUT CONTROL and WELD TERMINALS The Invertec V350 Pro has auto sensing of remote output controls If after connecting or removing a remote the Invertec V350 Pro did not configured the way you would like the local or remote control set tings can
162. o check for leaky or faulty filter capacitors 10 If the input rectifier is good be sure to reconnect leads 207 207A and 209 to the correct terminals and torque to 31 inch lbs Apply silicone sealant V350 PRO LINCOLN 5 24 24 NOTES V350 PRO LINCOLN 5 F 25 F 25 TROUBLESHOOTING amp REPAIR POWER BOARD TEST WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if the power board is receiving the correct voltages and also if the power board is regulating and producing the correct DC voltages MATERIALS NEEDED Volt Ohmmeter 5 16 Nut Driver Wiring Diagram This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 26 1 TROUBLESHOOTING amp REPAIR POWER BOARD TEST CONTINUED TEST PROCEDURE Remove input power to the V350 PRO machine Using a 5 16 nut
163. of the machine located around the mode board knobs Replace plugs 31 and 34 previously removed 23 24 25 26 Small Flathead Screwdriver Replace the four phillips head screws removed from the front of the machine located around the two welder output terminals Replace the six phillips head screws and their washers from around the input power switch Using a 5 16 nut driver replace the four screws previously removed from the front of the machine Replace the case wraparound cover V350 PRO LINCOLN 5 F 70 F 70 NOTES V350 PRO LINCOLN 5 F 71 F 71 TROUBLESHOOTING amp REPAIR STATUS BOARD REMOVAL AND REPLACEMENT WARNING 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the status board for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver Flat
164. ons quand soude ou quand on regarde b Porter des v tements convenables afin de prot ger la peau de soudeur et des aides contre le rayonnement de l arc c Prot ger l autre personnel travaillant proximit au soudage l aide d crans appropri s et non inflammables 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 huile tels que les gants en cuir chemise paisse pan talons sans revers et chaussures montantes Toujours porter des lunettes de s curit dans la zone de soudage Utiliser des lunettes avec crans lateraux dans les zones l on pique le laitier 6 Eloigner les mat riaux inflammables ou les recouvrir afin de pr venir tout risque d incendie d aux tincelles Quand on ne soude pas poser la pince une endroit isol de la masse Un court circuit accidental peut provoquer un chauffement et un risque d incendie S assurer que la masse est connect e le plus pr s possible de la zone de travail qu il est pratique de le faire Si on place la masse sur la charpente de la construction ou d autres endroits loign s de la zone de travail on augmente le risque de voir passer le courant de soudage par les chaines de levage c bles de grue ou autres circuits Cela peut provoquer des risques d incendie ou d echauffement des chaines et des c bles jusqu ce qu ils se rompent Assurer une ventila
165. ontrol Board Positive Input switch Input pu Output amp 100A Breaker Rectifier Current Terminal Sensor 7 O Negative Reconnect Output ele Terminal Switch N ue T EE Fan ZS Sensor 115VAC Fan Supply Input Relay Control Fan Control Soft Start Control V F Capacitor Feedback 2 Machine Control Supply 15VDC 15VDC 6VDC Output Voltage Sense 1 5 1991 Power Board 28VAC 40VDC SPI Supply 15VDC 5VDC RS232 Supply 5VDC Control Board SPI Communications amp 15VDC 5VDC Supply Solenoid Supply 40VDC Remote Board Status Panel Display Panel Panel Mode Remote Control amp Trigger 6 Pin Amphenol POWER BOARD CONTROL BOARD AND SERIAL PERIPHERAL INTER FACE SPI COMMUNICATIONS POWER BOARD The 28VAC auxiliary is rectified and filtered and applied to the power board The power board utilizing a switching power supply processes the 40VDC input and develops several regulated positive and negative DC supplies Three DC supplies are fed to the control board for machine control supplies Two positive DC voltages are coupled to the control board for the Serial Peripheral Communications SPI supplies A 5VDC is used for the RS232 connection supply and a 40VDC is fed to the remote board to power an
166. ontrol board and the mode select panel See the wiring diagram 2 Perform the SPI Cable Resistance and Voltage Test 3 The Mode Select Panel board may be faulty 4 The control board may be faulty The Status Panel Control and Weld Terminals Select does not function properly 1 Refer to Operation Section of this manual for normal operation characteristics 1 Check for loose or faulty plug connections between the control board and the status board See the wiring diagram 2 The Status Board may be faulty 3 The control board may be faulty CAUTION If for any reason you do not understand the test procedures or are unable to perform the test repairs safely con tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD V350 PRO LINCOLN 5 8 TROUBLESHOOTING amp REPAIR Observe Safety Guidelines detailed in the beginning of this manual PROBLEMS SYMPTOMS The display is not functioning properly POSSIBLE AREAS OF MISADJ USTMENT S FUNCTION PROBLEMS 1 Refer to the Operation Section of this manual for normal operation characteristics TROUBLESHOOTING GUIDE RECOMMENDED COURSE OF ACTION 1 Check for loose or faulty plug connections between the Display board and the control board See the wiring diagram 2 The display board may be faulty 3 The control board may be faulty
167. oot over the cable BOOT WELDING CABLE 25 mm din TRIM 3 Slide the copper tube into the brass plug 4 Insert cable into copper tube LINCOLN 5 4 4 INSTALLATION xax SCREW N BRASS PLUG COPPER TUBE 5 Tighten set screw to collapse copper tube Screw must apply pressure against welding cable The top of the set screw will be well below the surface of the brass plug after tightening 6 Slide rubber boot over brass plug The rubber boot must be positioned to completely cover all electrical surfaces after the plug is locked into the receptacle LINCOLN 5 Section B 1 Section B 1 TABLE OF CONTENTS OPERATION SECTION Operation o eae a Ht adeo aad ted Dao xd de ee euis Section B Operating Instr ctiOris teer tie eren erre e e ad D e YER EH B 2 ProducEDescriptioh s iioii ate EORR B 2 Be mE B 2 Operational Features and 3 2 2 Upper Control P ariel eai reete er RERO PEE B 2 Amps Meter incon one B 2 Volt Meter isi cordc eq en RUE ERE T AEG ue B 2 Output Controls d cete tele de d ha B 2 Weld 2 Thetitial oleae di caste edt ed ba edm ete d ie e DM B 3 Gontrol Remote te eae
168. ore than one fault message is being displayed perform all the checks for the faults before replacing the printed circuit board V350 PRO LINCOLN 5 TROUBLESHOOTING amp REPAIR FAULT CODES DESCRIPTION CORRECTIVE SERVICE FACILITY CORRECTIVE DEFINITION ACTION ACTION 35 Capacitor bank Make sure the reconnect There may bea problem B lower is over switches are configured with the V F signals from voltage for the input voltage the main switch board to being applied to the the control board machine The machine is self clearing when Perform the Main Switch condition ceases Perform the Power The control board may be faulty 37 The soft start Turn the machine off and There may be a problem function failed back on to reset the machine with the V F signals from the main switch board to the control board Perform the Main Switch Perform the Power Board Test The control board may be faulty NOTE If more than one fault message is being displayed perform all the checks for the faults before replacing the printed circuit board V350 PRO LINCOLN 5 F 12 TROUBLESHOOTING amp REPAIR F 12 FAULT CODES DESCRIPTION CORRECTIVE SERVICE FACILITY CORRECTIVE DEFINITION ACTION ACTION 39 Electrical glitch on the Possibly caused by an Perform the Main Switch primary over current fault external electrical detector circuit noise or signal level Make sure the V350 Pro Perfor
169. ory warranty Individual Printed Circuit Board Components are not available from Lincoln Electric This information is pro vided for reference only Lincoln 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 could result in damage to the LINCOLN machine V350 PRO ERROR REPORTING FORM We need to know if there are errors in our manuals We also value any suggestions as to additional tests or procedures that would make this SVM a better tool for you If you discover new or different Problems or Symptoms that are not covered in the three col umn troubleshooting chart please share this information with us Please include the machine s code number and how the problem was resolved Thank You Technical Services Group Lincoln Electric Co 22801 ST Clair Ave Cleveland Ohio 44117 1199 FAX 216 481 2309 SVM Number Page Number if necessary Your Company Your Name Please give detailed description below SD287 01 99 LINCOLN P
170. out 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if there is a possible open in the SPI cable and also determine if the correct supply voltages are being applied to the boards in the SPI network MATERIALS NEEDED Volt Ohmmeter 5 16 Nut Driver This procedure takes approximately 35 minutes to perform V350 PRO LINCOLN 5 46 46 TROUBLESHOOTING AND REPAIR SPI CABLE RESISTANCE AND VOLTAGE TEST continued TEST PROCEDURE Remove the input power to the V350 PRO Using the 5 16 nut driver remove the case wraparound cover Perform the Capacitor Discharge Procedure Using a 5 16 nut driver remove the control box top Cut any necessary cable ties Perform the Do not remove the SPI ribbon cable connecting the display board to the sta tus board If a remote board is present the SPI cable plug connecting the remote board to the display board will have to be removed from the display board Locate and remove plug J 3 from the control board See Figure F 15 Check the resistance and continuity of the SPI cable by testing with the ohmmeter from each pin on plug J3 to the corresponding pins on the plug removed from the display board See the machine sch
171. ower down signal gt J42 4 gt 407 407 347 lt POWERDOWN SIGNAL HIGH RUN uy POWER MACHINE 1518 J42 1 gt 412 412 J4 12 15V a v cet F 415B CONTROL 5 a 442 3 gt 408 408 4 8 5V a GND J42 5 gt 410 410 24 10 lt GND a 15 J42 2 gt 41 411 J4 11 15 slim 541 zu 6B 5 5 SPI b J43 b 403 403 J4 3 lt 5V SPI b ca a SPI 36 402 402 2 lt 15V SPI b 532 41 6 451 SUPPLY SPIGND b gt J43 12 gt 401 401 344 GND SPI b 42 2B a J Rg232 5 9232 6 J434 406 406 44 6 5V RS232 e 24 758 66B 41A supply GND e 39 405 405 44 5 GND e 32 ES 20 J43 8 gt 438 41B CHOPPER GND J43 2 gt 432 20 9 gt LI A P554 4 438 URRE HE 552 55 2 431 GND d J43 1 1 431 24 42 Volt Amphenol 7 lt P55 3 lt B amphenol gt ack of machine 778 768 1555 44 48 FLEX CIRCUIT 2 N CIRCUIT LOCAL CONTROL FLEX FLEX 115 Volt Amphenol IE bottom amphendl CIRCUIT CIRCUIT lt J34 lt 915 VOLT SPI on back of machine ub a 43 2 lt 5 VOLT SPI n ON lt 433 lt 185 i 1 52522522221 883 Teton aS a35983842 4 6 Pin Ampehnol BSSSRSSSUS Er TEE front of machine
172. procedure will aid the technician in removing the current transducer for maintenance or replacement MATERIALS NEEDED 5 16 Nut Driver 1 4 Nut Driver 1 2 Wrench 3 8 Wrench Channel Locks Flathead Screwdriver Phillips Head Screwdriver Hammer Crescent Wrench Pliers This procedure takes approximately 45 minutes to perform V350 PRO LINCOLN 5 90 90 TROUBLESHOOTING amp REPAIR CURRENT TRANSDUCER REMOVAL AND REPLACEMENT continued PROCEDURE 1 Remove input power to the V350 PRO 5 Using a phillips head screwdriver remove the two mounting screws from each wire feeder recepta 2 Using a 5 16 nut driver remove the case wrap cle See Figure F 40 3 around cover Using a 5 16 nut driver remove the four screws 6 Perform the Input Filter Capacitor Discharge from the top and bottom of the back of the Procedure detailed earlier in this section machine See Figure F 40 Remove the caps on the two wire feeder recepta cles FIGURE F 40 CASE BACK SCREW LOCATIONS 2 i i o B Gy Wire Feeder Receptacle gt Mounting Screws Plasti astic Nut 5 16 Mounting Screws V350 PRO LINCOLN 5 91 7 10 91 TROUBLESHOOTING amp REPAIR CURRENT TRANSDUCER REMOVAL AND REPLACEMENT continued Label and remove
173. pw NL NB N G NM 5 PLACES NK 4 PLACES NOTE NN d 2 PLACES NH 2 PLACES NJ 8 PLACES D XO WI 275 085 CRIMP HEIGHT 3 NON COMPONENT EYELET DETAIL MANUFACTURED AS G3830 1B1 IDENTIFICATION CODE PART NO NOTES NA CAUTION THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY LINCOLN ELECTRIC TO SEE E2454 BEFORE HANDLING N B SNAP POWER TERMINALS INTO COMPONENT SIDE OF BOARD N C THIS AREA TO BE COVERED ON BOTH SIDES OF BOARD WHERE POSSIBLE WITH SEALANT PRIOR TO ENCAPSULATION N D INJECT SEALANT ITEM 8 THROUGH THE PC BOARD TO SEAL MODULE LEADS 16 PLACES AND ALL COMPONENT LEADS ON THE NONO COMPONENT SIDE OF THE BOARD THAT ARE COVERED BY MODULE CASE N E FEMALE EYELET TO BE AGAINST THE NON COMPONENT SIDE AS SHOWN EYELET MUST
174. rcuits will prevent output if any of the following conditions exist 1 Voltage across a capacitor pair exceeds 467 volts High line surges or improper input voltage connections 2 Voltage across a capacitor pair is under 190 volts Due to improper input voltage connections 3 Internal component damage V350 PRO LINCOLN 5 THEORY OF OPERATION INSULATED GATE BIPOLAR TRANSISTOR IGBT OPERATION An IGBT is a type of transistor IGBT are semiconduc tors well suited for high frequency switching and high current applications Example A in Figure E 8 shows an IGBT in passive mode There is no gate signal zero volts relative to the source and therefore no current flow The drain ter minal of the IGBT may be connected to a voltage sup ply but since there is no conduction the circuit will not supply current to components connected to the source The circuit is turned OFF like a light switch Example B shows the IGBT in an active mode When the gate signal a positive DC voltage relative to the source is applied to the gate terminal of the IGBT it is capable of conducting current A voltage supply con nected to the drain terminal will allow the IGBT to con duct and supply current to the circuit components coupled to the source Current will flow through the conducting IGBT to downstream components as long as the positive gate signal is present This is similar to turning ON a light switch FIGURE E 6 IGBT
175. re detailed earlier this section mounting screws and washers from the input bridge 8 Remove the input bridge 4 Locate the input rectifier See figure F 36 5 Carefully remove the silicon sealant insulating the six input rectifier terminals FIGURE F 36 INPUT RECTIFIER LOCATION INPUT RECTIFIER V350 PRO LINCOLN 5 F 83 F 83 TROUBLESHOOTING amp REPAIR INPUT RECTIFIER REMOVAL AND REPLACEMENT continued 9 Apply a thin coat of Penetrox A 13 heatsink com 11 Reconnect the previously removed leads to their pound to the point of contact between the input proper locations Torque to 31 inch pounds rectifier and the mounting surface 12 Cover the input rectifier and its six terminals with 10 Secure the new input bridge into its proper posi silicon sealant tion with the two 3 16 in allen mounting screws previously removed Torque to 44 inch pounds 13 Replace the case wraparound cover FIGURE F 37 INPUT RECTIFIER CLOSE UP small Lead H1 To Auxiliary Transformer 3 16 ALLEN BOLTS 207 207 209 Small Lead A FRONT To Circuit Breaker REAR V350 PRO LINCOLN 5 84 84 NOTES V350 PRO LINCOLN 5 d TROUBLESHOOTING amp REPAIR is OUTPUT RECTIFIER MODULES REMOVAL AND REPLACEMENT WARNING Service and repair should be performed by only Lincoln Electric factory trained personnel Unauthori
176. reathing zone D WELDING SPARKS can cause fire or gt lt explosion Keep flammable material away Do not weld on closed containers ARC RAYS can burn eyes and skin Wear eye ear and body protection NM See additional warning information at front of this operators manual GENERAL DESCRIPTION PRODUCT DESCRIPTION The Invertec V350 Pro offers multi mode CV and CC DC welding and is rated 350 amps 34 volts at a 60 duty cycle The V350 Pro is available in European and Rest of the World North America and Export versions Differences between these versions are input ratings and CE noise filtering In the different configurations the V350 Pro is available in either a construction ver sion no wire feeder connection and auxiliary power and a factory version includes wire feeder connection and related power DUTY CYCLE The V350 Pro is rated at 350 amps 60 duty cycle based on a 10 minute cycle It is also rated at 275 amps 100 duty cycle OPERATIONAL FEATURES and CONTROLS UPPER CONTROL PANEL 1 AMPS Meter Prior to STICK or TIG operation current flow the meter displays preset current value either 2 amps or 396 e g 3 amps on 100 whichever is greater Prior to CV operation the meter displays four dash es indicating non presetable AMPS During welding this meter displays actual average amps After welding the meter holds the actual current value for 5 second
177. rect spacings are maintained All external sheet metal screws must be in place to insure case strength and elec trical ground continuity V350 PRO LINCOLN 5 D 3 MAINTENANCE OVERLOAD PROTECTION The machine is electrically protected from producing high output currents Should the output current exceed 430A an electronic protection circuit will reduce the current to approximately 100A The machine will con tinue to produce this low current until the protection cir cuit is reset Reset occurs when the output load is removed THERMAL PROTECTION Thermostats protect the machine from excessive oper ating temperatures Excessive temperatures may be caused by a lack of cooling air or operating the machine beyond the duty cycle and output rating If excessive operating temperature should occur the thermostat will prevent output voltage or current The meter will remain energized during this time Thermostats are self resetting once the machine cools sufficiently If the thermostat shutdown was caused by excessive output or duty cycle and the fan is operating normally the Power Switch may be left on and the reset should occur within a 15 minute period V350 PRO LINCOLN 5 0 4 MAINTENANCE FIGURE D 2 MAJOR COMPONENT LOCATIONS 1 Center Panel 2 Base Assembly 3 Control Box Assembly 4 Case Back 5 Case Front 6 Case Wraparound V350 PRO LINCOLN Section 1 Section E 1 TABLE OF CONTENTS
178. ross the welding output terminals If less than 200 ohms is measured one or more diodes or the snubber board may be faulty Perform the Filter Capacitor Discharge Procedure detailed in the maintenance sec tion Locate the output diode modules and snub ber board See Figure F 7 V350 PRO 9 Test all output diode modules individually NOTE This may require the disassembly of the leads and the snubber board from the diode modules Refer to the Output Diode Modules Removal and Replacement Procedure for detailed instructions LINCOLN 5 F 31 TROUBLESHOOTING amp REPAIR OUTPUT DIODE MODULES TEST continued Figure F 7 Snubber and Output Diode Locations Output Diode Modules Snubber Board b LEFT SIDE V350 PRO LINCOLN 5 33 33 TROUBLESHOOTING amp REPAIR AUXILIARY TRANSFORMER TEST WARNING 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 electrical 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 troubleshooting assistan
179. rs could result in damage to the machine LINCOLN 5 V350 PRO 3 15 ELECTRICAL DIAGRAMS G 15 SCHEMATIC STATUS PRINTED CIRCUIT BOARD BEE6T 3684 UNCONNECTED C16 AN ATDF L HC368A 100V x3 Visi x DATA OUT BANK2 3 COLD STUDS BANK3 ENABLE BANKS S1 HC368A STROBE DATA IN y CLOCK Rx R1 MC14489 100 R23 e e C21 C24 022 7D 27 LOCAL 50V 50V CONTROL jaji ya lt lt lt R22 T DATA OUT C10 475K BANK1 BANK2 BANK4 C7 ENABLE BANKS TT 10 DATALIN xc E dC Dy WDR CCS SC SES es es paces 551 9 022 T 2 100 50V R19 Dout HC368A EOC X3 Vref GSPI 10 0K 10 CAL REMOTE NOTE RIGHT LED PAIR TELLS OPERATOR THE STATUS OF THE OUTPUT PIE RED HOT STUD OUTROS GREEN REMOTE
180. s Output adjustment while in the hold period results in the prior to operation char acteristics stated above The displays blink indicat ing that the machine is in the Hold period 2 VOLT METER Prior to CV operation current flow the meter dis plays desired preset voltage value 5V Prior to STICK or TIG operation the meter displays the Open Circuit Voltage of the Power Source or four dashes if the output has not been turned on During welding this meter displays actual average volts After welding the meter holds the actual voltage value for 5 seconds The displays blink indicating that the machine is in the Hold period Output adjustment while in the hold period results in the prior to operation characteristics stated above 3 OUTPUT CONTROL Output control is conducted via a single turn poten tiometer Adjustment is indicated by the meters as stated above When in TIG modes this control sets the maximum welding current Full depression of a foot or hand Amptrol results in the preset level of current 4 WELD TERMINALS REMOTE ON Two status lights indicate the location of trigger control as determined by the WELD TERMINALS push button If trigger control is local weld terminals on the ON display will be lit f trigger control is remote weld terminals remotely controlled the REMOTE display will be lit The unit will power up in pre determined preferred trigg
181. s parties sous tension et la peau nue ou les v tements mouill s Porter des gants secs et sans trous pour isoler les mains Faire tr s attention de bien s isoler de la masse quand on soude dans des endroits humides ou sur un plancher met allique ou des grilles metalliques principalement dans les positions assis ou couch pour lesquelles une grande partie du corps peut tre en contact avec la masse Maintenir le porte lectrode la pince de masse le c ble de soudage et la machine souder en bon et s r tat defonc tionnement d Ne jamais plonger le porte lectrode dans l eau pour le refroidir Ne jamais toucher simultan ment les parties sous tension des porte lectrodes connect s deux machines souder parce que la tension entre les deux pinces peut tre le total de la tension vide des deux machines Si on utilise la machine souder comme une source de courant pour soudage semi automatique ces precautions pour le porte lectrode s applicuent aussi au pistolet de soudage 2 Dans le cas de travail au dessus du niveau du sol se prot ger contre les chutes dans le cas ou on recoit un choc Ne jamais enrouler le c ble lectrode autour de n importe quelle partie du corps Uncoup d arc peut tre plus s v re qu un coup de soliel donc a Utiliser un bon masque avec un verre filtrant appropri ainsi qu un verre blanc afin de se prot ger les yeux du rayon nement de et des projecti
182. ssistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This procedure will drain off any charge stored in the four large capacitors that are part of the switch board assembly This procedure MUST be performed as a safety pre caution before conducting any test or repair procedure that requires you to touch inter nal components of the machine MATERIALS NEEDED 5 16 Nut Driver Insulated Pliers Insulated Gloves High Wattage Resistor 25 1000 ohms and 25 watts minimum DC Volt Meter This procedure takes approximately 20 minutes to perform V350 PRO LINCOLN 5 F 15 16 16 TROUBLESHOOTING amp REPAIR INPUT FILTER CAPACITOR DISCHARGE PROCEDURE continued WARNING ELECTRIC SHOCK can kill Have an electrician install and service this equipment Do not touch electrically hot parts Turn the input power off at the fuse box before working on equipment Prior to performing preventative maintenance perform the following capacitor discharge procedure to avoid electric shock DISCHARGE PROCEDURE 1 Remove the input power to the V350 PRO 2 Using the 5 16 wrench remove the screws from the case wraparound cover Be careful not to make contact with the capacitor terminals located at the top and bottom of the switch board 4 Obtain a high resistance and high wattage resistor 25 1000 ohms and 25 watts minimum This resistor is not with the machine NEV
183. t mode is selected The OCV is controlled below 10v and the short circuit TIG touch current is main tained at 25 amps independent of the preset cur rent When the tungsten is lifted an arc is initiated and the output is regulated at the preset value Hot start settings between 0 and 5 regulate the arc ini tiation current A setting of 5 results in the most positive arc initiation A setting of 0 reduces hot start Hot Start settings between 5 and 10 select high frequency assisted starting TIG mode In this range the OCV of the machine is controlled between 50 and 70 volts If using the Lincoln K930 1 TIG Module set the Hot start to 10 for maximum OCV The Arc Control is not used in the TIG mode CV WIRE The CV WIRE mode features continuous control from 10 to 40 volts The mode was intended for most GMAW FCAW and MCAW applications Hot Start control is not used in the CV WIRE mode The Arc Control regulates pinch effect At the mini mum setting 10 minimizes pinch and results in a soft arc Low pinch settings are preferable for welding with gas mixes containing mostly inert gases At the maximum setting 10 maximizes pinch effect and results in a crisp arc High pinch settings are preferable for welding FCAW and GMAW with CO2 CV FLUX CORED The CV FLUX CORED mode features continuous control from 10 to 45 volts This mode was designed for self shielded flux cored wires that require tight voltage co
184. test procedures or are unable to perform the test repairs safely contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION This test will help determine if the current transducer and associated wiring are functioning correctly MATERIALS NEEDED Volt ohmmeter 5 16 Nut Driver Grid Bank External DC Ammeter This procedure takes approximately 45 minutes to perform V350 PRO LINCOLN 5 38 38 TROUBLESHOOTING AND REPAIR CURRENT TRANSDUCER TEST continued FIGURE F 10 Metal Plate Removal amp Plug J 8 Location 5 16 Screws Metal Plate TEST PROCEDURE 1 2 3 Remove input power to the V350 PRO Using the 5 16 nut driver remove the case wraparound cover Perform the Input Capacitor Discharge Using the 5 16 nut driver remove the control box top and cut any necessary cable ties See Figure F 10 Locate plug J 8 on the control board Do not remove the plug from the P C Board Apply the correct input power to the V350 PRO Check for the correct DC supply voltages to the current transducer at plug J 8 See Figure F 11 A Pin 2 lead 802 to pin 6 lead 806 should read 15 VDC B Pin 4 lead 804 to pin 6 lead 806 should read 15 VDC If either of the supply voltages are low or miss ing the control board may be faulty FIGURE F 11 Plug J 8 Viewed From Lead Side of P
185. the mode select button in until the displays read 5 mode 200 4 Release the Mode Select button and the 6 machine will be in mode 200 5 With the machine in mode 200 apply a resistive 7 load to the welding output terminals approxi mately 087 ohms set the machine output to 300 amps and enable the Weld Terminals 8 Weld Terminals Select ON 6 Using the test meters note the output voltage and current 9 7 The V350 PRO voltmeter must match the test meter reading to within 1 volt 10 8 The V350 PRO ammeter must match the test 11 meter within 5 amps 9 If the voltmeter does not meet the specification then proceed to the Voltage Calibration 10 If the ammeter does not meet the specification then proceed to the Current Calibration NOTE Before attempting to calibrate the voltage or current setting of the V350 PRO be sure to read the entire voltage or current calibration section If the steps are not completed quickly the machine will automatically leave the calibration mode with out changing the calibration settings The voltage and current calibration settings of the V350 PRO are completely independent of each other Adjusting one will not affect the other V350 PRO VOLTAGE CALIBRATION Connect the resistive load band approximate ly 087 ohms and test voltmeter to the welding output terminals Press and hold in the Mode Select button Turn on the V350 PRO Rotate the Output Control knob
186. this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty For your safety and to avoid Electrical Shock please observe all safety notes and precautions detailed throughout this manual This Troubleshooting Guide is provided to help you locate and repair possible machine malfunctions Simply follow the three step procedure listed below Step 1 LOCATE PROBLEM SYMPTOM Look under the column labeled PROBLEM SYMPTOMS This column describes possible symptoms that the machine may exhibit Find the listing that best describes the symptom that the machine is exhibiting Symptoms are grouped into three main categories Output Problems Function Problems and LED Function Problems Step 2 PERFORM EXTERNAL TESTS The second column labeled POSSIBLE AREAS OF MISADJ USTMENT 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 conducted without removing the case wrap around cover Step 3 PERFORM COMPONENT TESTS The last column labeled Recommended Course of Action lists the most likely components that may have failed in your machine It also specifies the appropriate test procedure to verify that the subject component is either good or bad If there are a number of possible components check the components in the order listed to eliminate one possibility at
187. tion suffisante dans la zone de soudage Ceci est particuli rement important pour le soudage de t les galvanis es plomb es ou cadmi es ou tout autre m tal qui produit des fume s toxiques Ne pas souder en pr sence de vapeurs de chlore provenant d op rations de d graissage nettoyage ou pistolage La chaleur ou les rayons de l arc peuvent r agir avec les vapeurs du solvant pour produire du phosg ne gas fortement toxique ou autres produits irritants 11 Pour obtenir de plus amples renseignements sur la s ret voir le code Code for safety in welding and cutting CSA Standard W 117 2 1974 PR CAUTIONS DE S RET POUR LES MACHINES SOUDER TRANSFORMATEUR ET REDRESSEUR 1 Relier la terre le chassis du poste conformement au code de l lectricit et aux recommendations du fabricant Le dispositif de montage ou la piece souder doit tre branch une bonne mise la terre Autant que possible l installation et l entretien du poste seront effectu s par un lectricien qualifi Avant de faires des travaux l interieur de poste la debranch er l interrupteur la boite de fusibles Garder tous les couvercles et dispositifs de s ret leur place LINCOLN 5 MASTER TABLE OF CONTENTS FOR ALL SECTIONS Safety ooo A ed dina i iv Installation op ode uote DRE OH RR e ae PM AER ERR Section A Operation b dato
188. vailable from your welding distributor or from the manufacturer Mar 95 SAFETY 7 WELDING SPARKS _ cause fire or explosion 6 a Remove fire hazards from the welding area 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 adjacent areas Avoid welding near hydraulic lines Have a fire extinguisher readily available Where compressed gases are to be used at the job site special precautions should be used to prevent hazardous situations Refer to Safety in Welding and Cutting ANSI Standard Z49 1 and the operating information for the equipment being used When not welding make certain no part of the electrode circuit is touching the work or ground Accidental contact can cause overheating and create a fire hazard Do not heat cut or weld tanks drums or containers until the proper steps have been taken to insure that such procedures will not cause flammable or toxic vapors from substances inside They can cause an explosion even though they have been cleaned For information purchase Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping That Have Held Hazardous Substances AWS F4 1 from the American Welding Society see address above Vent hollow castings or containers before heating cutt
189. voltage with the optional remote control if used Set the ARC control at 0 initially and adjust to suit Figure C 5 V350 PRO LN 7 with K480 Control Cable Connection Diagram 14 PIN AMPHENOL 115VAC AT REAR OF MACHINE 6 PIN AMPHENOL TO WORK K480 CONTROL CABLE TO LN 7 INPUT CABLE PLUG OPTIONAL K857 REMOTE CONTROL ELECTRODE CABLE TO WIRE FEED UNIT V350 PRO LINCOLN 5 7 7 ACCESSORIES CONNECTION OF THE K867 ADAPTER FOR USE WITH THE K291 OR K404 INPUT CABLES AND LN 7 1 Insulate each unused lead individually 2 Splice leads and insulate Figure C 6 Connection of LN 7 to V350 PRO using K867 adapter SPARE o ELECTRODE CABLE 82 0 LN 7 TO LN 7 0 81 o gt 1 CONTROL TO 14 PIN 115VAC 42 o BOX WORK AMPHENOL 41 o bB 31 0o 31 7 32 o 32 2 o 2 4 o 4 o M 21 o 21 K291 OR K404 ADAPTER PLUG GND N INPUT CABLE INVERTEC 75 75 POWER SOURCE 76 o 76 M 77 _o _ 77 K775 OPTIONAL 2 REMOTE CONTROL V350 PRO LINCOLN 5 C 8 C 8 ACCESSORIES CONNECTION OF THE LN 742 TO THE V350 PRO SEE FIGURE C 7 NOTE AN LN 7 CAN ONLY BE USED WITH A FAC TORY OR VERSION OF THE V350 PRO 1 Remove input power to the V350 PRO 2 Connect the electrode cable from the LN 742 to the terminal of the wel
190. y 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the snubber board for mainte nance or replacement MATERIALS NEEDED 5 16 Nut Driver 7 16 Socket or Nut Driver This procedure takes approximately 15 minutes to perform V350 PRO LINCOLN 5 F 76 F 76 TROUBLESHOOTING amp REPAIR SNUBBER BOARD REMOVAL AND REPLACEMENT continued PROCEDURE 1 Remove input power to the V350 PRO 3 Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section 2 Using a 5 16 nut driver remove the case wrap around cover 4 Locate the snubber board See Figure F 32 FIGURE F 32 SNUBBER BOARD LOCATION Snubber Board LEFT SIDE 5 Remove small lead 81 from the board See 8 Replace the snubber board Figure F 33 9 Replace the bolts leads and washers
191. zed 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 electrical 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 troubleshooting assistance before you proceed Call 1 800 833 9353 WELD DESCRIPTION The following procedure will aid the technician in removing the output rectifier modules for maintenance or replacement MATERIALS NEEDED 3 16 Allen wrench 9 64 Allen wrench 5 16 Nut Driver 7 16 Wrench Flathead Screwdriver Penetrox A 13 Heatsink Compound Thin Knife S crewdriver This procedure takes approximately 30 minutes to perform V350 PRO LINCOLN 5 F 86 F 86 TROUBLESHOOTING amp REPAIR OUTPUT RECTIFIER MODULES REMOVAL AND REPLACEMENT continued PROCEDURE 1 Remove input power to the V350 PRO 5 Before the output rectifier modules can be reached the Snubber Board Removal 2 Using a 5 16 nut driver remove the case wrap must be performed around cover 6 After the snubber board is removed remove the 3 Perform the Input Filter Capacitor Discharge four leads connected to the modules using a 3 16 Procedure detailed earlier in this section allen wren

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