Lincoln Electric INVERTEC V350-PRO SVM152-A manuale d’uso

SVM152-A JUL Y , 2000 Safety Depends on Y ou Lincoln arc welding and cutting equipment is designed and built with safety in mind. However , your overall safety can be increased by pr oper installation . . . and thoughtful operation on your part. DO NOT INST ALL, OPERA TE OR REP AIR THIS EQUIPMENT WITHOUT READ- ING THIS MANUAL AND THE SAFETY PRECAUT[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC i SAFETY i FOR ENGINE powered equipment. 1.a. T urn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Operate engines in open, well-ventilated a[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ii SAFETY ii ARC RA YS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I standards. 4.b. U[...]

SAFETY iii iii V350-PRO Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ELECTRICALL Y powered equipment. 8.a. T urn off input power using the disconnect switch at the fuse box before working on the equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the [...]

SAFETY iv iv V350-PRO Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- antes: Sûre[...]

MASTER T ABLE OF CONTENTS FOR ALL SECTIONS v v V350-PRO Page Safety .................................................................................................................................................i-iv Installation .......................................................................................................................[...]

SectionA-1 Section A-1 V350-PRO Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - INST ALLA TION SECTION - Installation T echnical Specifications ....................................................................................................... ......A-2 Input Grounding Connections .......[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC A-2 INST ALLA TION A-2 TECHNICAL SPECIFICA TIONS - INVERTEC V350-PRO INPUT AC VOL T AGE & DC OUTPUT OUTPUT CABLES, CONNECTIONS AND LIMIT A TIONS Product Or dering In[...]

INST ALLA TION A-3 A-3 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INPUT AND GROUNDING CONNECTIONS 1. Only a qualified electrician should connect the Invertec V350-PRO. Installation should be made in accordance wi[...]

INST ALLA TION A-4 A-4 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 5. T ighten set screw to collapse copper tube. Screw must apply pressure against welding cable. The top of the set screw will be well below the su[...]

Section B-1 Section B-1 V350-PRO T ABLE OF CONTENTS - OPERA TION SECTION - Operation ............................................................................................................................... Section B Operating Instructions ........................................................................................................[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC B-2 B-2 V350-PRO OPERA TION OPERA TING INSTRUCTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrode with skin or wet clothing. • Insulate yoursel[...]

OPERA TION B-3 B-3 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC For both the Construction and Factory versions, these trigger modes can be over-ridden (switched) with the WELD TERMINALS push button. When changed, t[...]

OPERA TION B-4 B-4 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC • 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 mi[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC OPERA TION B-5 B-5 V350-PRO TIG mode • 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 [...]

OPERA TION B-6 B-6 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Auxiliary Power • 1 15V AC, 42V AC and 24V AC power is available from the two 14-pin amphenols on the rear of the unit. (K1728-2 Construction model [...]

C-1 C-1 V350-PRO Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - ACCESSORIES SECTION - Accessories ........................................................................................................................... Section C Connection of Lincoln Electric Wire Feeders.................[...]

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 requir ed by the electrode. Connect the work lead to the other terminal. W elding cable mus[...]

CONNECTION OF THE LN-25 TO THE V350-PRO “ ACROSS THE ARC ” WITH OPTIONAL 6 PIN K857 REMOTE CON- TROL. 1. Remove input power to the V350-PRO. 2. Connect the electrode cable to the output terminal of polarity requir ed by the electrode. Connect the work lead to the other terminal. W elding cable must be sized for current and duty cycle of the app[...]

ACCESSORIES C-4 C-4 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC CONNECTION OF THE LN-25 WITH K431 REMOTE OPTION TO THE V350-PRO. NOTE: AN LN-25 CAN ONL Y BE USED WITH A F AC- TOR Y OR “ CE ” VERSION OF THE V35[...]

ACCESSORIES C-5 C-5 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 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 K4[...]

ACCESSORIES C-6 C-6 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC CONNECTION OF THE LN-7 TO THE V350- PRO USING K480 CONTROL CABLE (SEE FIGURE C.5) NOTE: AN LN-7 CAN ONL Y BE USED WITH A F AC- TOR Y OR “ CE ” VE[...]

ACCESSORIES C-7 C-7 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 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 i[...]

C-8 C-8 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ACCESSORIES CONNECTION OF THE LN-742 TO THE V350-PRO (SEE FIGURE C.7) NOTE: AN LN-7 CAN ONL Y BE USED WITH A F AC- TOR Y OR “ CE ” VERSION OF THE V350-PRO. 1[...]

CONNECTION OF THE LN-10 TO THE V350- PRO USING THE K1505 CONTROL CABLE. NOTE: AN LN-10 CAN ONL Y BE USED WITH A F AC- TOR Y OR “ CE ” 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 24/42V AC 14 pin amphenol con- necter on the rear of the V350-PRO. 3. Connect the [...]

ACCESSORIES C-10 C-10 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC OPTIONS / ACCESSORIES Construction V ersion – K1728-2 • All welding modes for this model run with local out- put control and weld terminals ON [...]

Section D-1 Section D-1 V350-PRO T ABLE OF CONTENTS -MAINTENANCE- Maintenance ......................................................................................................................... Section D Input Filter Capacitor Dischar ge Procedur e ...............................................................................D-2 Routine Main[...]

MAINTENANCE D-2 D-2 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC - + - + - + - + CAP ACITOR TERMINALS POWER RESISTOR INSULA TED GLOVES INSULA TED PLIERS EIGHT FIGURE D.1 — LOCA TION OF INPUT FIL TER CAP ACITOR TE[...]

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 re[...]

W A R N IN G R E M O T E P O W E R O F F O N A AMPS A V VOLTS WELD T ERM IN ALS SE LE CT OUTPUT LINCOLN ELECTR IC INVERTEC V350-PRO WARNING WARNING A VISO DE PRECAUCION A TTENTION ! ! ! ! Lorem i ps um d ol or s it ame t co ns ecte t ue r a d ip iscing L orem ipsum dolor s it amet conse ct etuer a d ipi scing elit, e d d ia m non elit, ed di am non[...]

Section E-1 Section E-1 V350-PRO Theory of Operation ............................................................................................................. Section E General Description ....................................................................................................................E-2 Input Line V oltage, Auxiliary T rans[...]

FIGURE E.2 – INPUT VOL T AGE AND PRECHARGE Remote Board Mode P anel Status P anel Display P anel Control Board Choke P ositive Output T er minal Negative Output T er minal T o Control Board Current Feedbac k Reconnect Switch Output V oltage Sense Input switch & 100A Breaker Input Rectifier Auxiliary T ransf ormer Fa n Po w e r Board 14 Pin Am[...]

SWITCH BOARD & MAIN TRANSFORMER There is one switch boar d 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 cir cuit, and a voltage/fre- quency capacitor feedback circuit. The two capaci- tors in a pair are always in series with ea[...]

THEOR Y OF OPERA TION E-4 E-4 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE E.4 – POWER BOARD, CONTROL BOARD AND SERIAL PERIPHERAL INTERF ACE (SPI) COMMUNICA TIONS Remote Board Mode P anel Status P anel Dis[...]

OUTPUT RECTIFIER AND CHOKE The output rectifier r eceives 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. THEOR Y [...]

THERMAL PROTECTION T wo normally closed (NC) thermostats protect the machine from excessive operating temperatur es. These thermostats are wir ed in series and are con- nected to the control boar d. One of the thermostats is located on the heat sink of the switch board and the other is located on the output choke. Excessive tem- peratures may be ca[...]

INSULA TED GA TE BIPOLAR TRANSIST OR (IGBT) OPERA TION 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, zer o volts r elative to the source, and ther efore, no curr ent flow . The drain t[...]

PULSE WIDTH MODULA TION 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[...]

V350-PRO Section F-1 Section F-1 T roubleshooting & Repair Section ................................................................................. Section F How to Use T roubleshooting Guide ....................................................................................F-2 PC Board T roubleshooting Procedur es and Replacement ...........[...]

HOW TO USE TROUBLESHOOTING GUIDE Service and repair should be performed by only Lincoln Electric Factory T rained Personnel. Unauthorized repairs performed on this equipment may r esult 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 safet[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRIC SHOCK can kill. Have an electrician install and service this equipment. T urn the machine OFF before working on equipment. Do not touch electrically hot parts. [...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-4 F-4 Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. CAUTION If for any reason you do not unde[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-5 F-5 TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not unde[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-6 F-6 Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. CAUTION If for any reason you do not unde[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-7 F-7 Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. CAUTION If for any reason you do not unde[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-8 F-8 Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in the beginning of this manual. CAUTION If for any reason you do not unde[...]

SERVICE F ACILITY CORRECTIVE ACTION CORRECTIVE ACTION DESCRIPTION/ DEFINITION 31 32 Main transformer primary over current Capacitor bank “A” (lower) is under voltage T urn the machine off and back on to reset the machine. If condition persists, contact an authorized Lincoln Field Service Facility . Make sure the r econnect switches are configur[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SERVICE F ACILITY CORRECTIVE ACTION CORRECTIVE ACTION DESCRIPTION/ DEFINITION 33 34 Capacitor bank "B"(upper) is under voltage. Capacitor bank "A"(lo[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SERVICE F ACILITY CORRECTIVE ACTION CORRECTIVE ACTION DESCRIPTION/ DEFINITION 35 37 Capacitor bank "B"(lower) is over voltage. The soft start function failed. [...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SERVICE F ACILITY CORRECTIVE ACTION CORRECTIVE ACTION DESCRIPTION/ DEFINITION 39 43 44 Electrical "glitch" on the primary over current fault detector circuit. [...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SERVICE F ACILITY CORRECTIVE ACTION CORRECTIVE ACTION DESCRIPTION/ DEFINITION 47 “bad node” “####” Electrical "glitch" on the V/F signals from the main[...]

NOTES F-14 F-14 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

W ARNING Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-15 F-15 V350-PRO INPUT FIL TER CAP ACITOR DISCHARGE PROCEDURE Service and repair should be performed by only Lincoln Electric factory tra[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-16 F-16 V350-PRO ELECTRIC SHOCK can kill. • Have an electrician install and service this equipment. • T ur n the input power off at the fuse b[...]

MAIN SWITCH BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 [...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-18 F-18 V350-PRO MAIN SWITCH BOARD TEST (continued) FIGURE F .2 MAIN SWITCH BOARD LEAD LOCA TIONS TEST PROCEDURE 1. Remove input power to the V350[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-19 F-19 V350-PRO MAIN SWITCH BOARD TEST (continued) T ABLE F .1. SWITCH BOARD RESIST ANCE TEST 6. If any test fails r eplace the switch board. See[...]

NOTES F-20 F-20 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

TROUBLESHOOTING & REP AIR F-21 F-21 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INPUT RECTIFIER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repa[...]

TEST PROCEDURE 1. Remove input power to the V350-PRO machine. 2. Using a 5/16” nut driver , remove the case wraparound cover . 3. Perform the Capacitor Discharge Procedur e detailed earlier in this section. 4. Locate the input r ectifier and associated leads. See Figure F .3. 5. Carefully r emove the silicone sealant from leads 207, 207A, and 209[...]

TROUBLESHOOTING & REP AIR F-23 F-23 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 9. If the input rectifier does not meet the acceptable readings outlined in T able F .2 the component may be faulty . Replace Not[...]

NOTES F-24 F-24 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

F-25 F-25 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR POWER BOARD TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs [...]

TEST PROCEDURE 1. Remove input power to the V350-PRO machine. 2. Using a 5/16” nut driver , remove the case wraparound cover . 3. Perform the Capacitor Discharge Procedure detailed earlier in this section. 4. Locate the power board and plugs J41, J42 and J43. Do not remove plugs fr om the power board. See Figure F .4. 5. Carefully apply the corre[...]

TROUBLESHOOTING & REP AIR F-27 F-27 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC POWER BOARD TEST (CONTINUED) T able F .3 Power Board V oltage Checks CHECK POINT LOCA TION TEST DESCRIPTION CONNECTOR PLUG PIN NO[...]

NOTES F-28 F-28 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

OUTPUT DIODE MODULES TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 a[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-30 F-30 V350-PRO OUTPUT DIODE MODULES TEST (continued) TEST PROCEDURE 1. Remove input power to the V350-PRO. 2. Locate the output terminals on the[...]

TROUBLESHOOTING & REP AIR F-31 F-31 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC OUTPUT DIODE MODULES TEST (continued) 5. If 200 ohms is measured then the output diodes are not “shorted”. NOTE: There is a 2[...]

TROUBLESHOOTING & REP AIR OUTPUT DIODE MODULES TEST (continued) F-32 F-32 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Figure F .7 Snubber and Output Diode Locations LEFT SIDE Snub ber Board Output Diode Module[...]

AUXILIAR Y TRANSFORMER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-34 F-34 V350-PRO AUXILIAR Y TRANSFORMER TEST (continued) TEST PROCEDURE 1. Remove input power to the V350-PRO. 2. Using a 5/16” nut driver , rem[...]

TROUBLESHOOTING & REP AIR AUXILIAR Y TRANSFORMER NO.1 TEST (continued) F-35 F-35 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 7. Carefully apply the correct input voltage to the V350-PRO and check for the corre[...]

NOTES F-36 F-36 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

TROUBLESHOOTING AND REP AIR F-37 F-37 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC CURRENT TRANSDUCER TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized rep[...]

TROUBLESHOOTING AND REP AIR CURRENT TRANSDUCER TEST (continued) F-38 F-38 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TEST PROCEDURE 1. Remove input power to the V350-PRO. 2. Using the 5/16” nut driver , remove [...]

TROUBLESHOOTING AND REP AIR CURRENT TRANSDUCER TEST (continued) F-39 F-39 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 9. Check the feedback voltage from the current transducer using a resistive load bank and with [...]

NOTES F-40 F-40 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

TROUBLESHOOTING AND REP AIR F-41 F-41 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F AN CONTROL AND MOTOR TEST Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized[...]

TROUBLESHOOTING AND REP AIR F AN CONTROL AND MOTOR TEST (continued) F-42 F-42 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TEST PROCEDURE 1. Remove the input power to the V350-PRO machine. 2. Using the 5/16” nut [...]

Lead 716- Plug J20 Lead 715+ TROUBLESHOOTING AND REP AIR F AN CONTROL AND MOTOR TEST (continued) F-43 F-43 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 7. If the 115V AC is low or not present perform The Auxiliary [...]

NOTES F-44 F-44 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

TROUBLESHOOTING AND REP AIR F-45 F-45 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SPI CABLE RESIST ANCE AND VOL T AGE TEST Service and repair should be performed by only Lincoln Electric factory trained personnel.[...]

TROUBLESHOOTING AND REP AIR SPI CABLE RESIST ANCE AND VOL T AGE TEST (continued) F-46 F-46 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TEST PROCEDURE 1. Remove the input power to the V350-PRO. 2. Using the 5/16”[...]

VOL T AGE AND CURRENT CALIBRA TION PROCEDURE Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty . For your safety and to avoid electrical shock, please observe[...]

TROUBLESHOOTING AND REP AIR VOL T AGE AND CURRENT CALIBRA TION PROCEDURE (continued) F-48 F-48 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC CALIBRA TION CHECK The calibration of the V350-PRO can be checked using a [...]

CURRENT CALIBRA TION PROCEDURE 1. Connect the resistive load band (approxi- mately .087 ohms) and test ammeter to the welding output terminals. 2. Press and hold in the Mode Select button. 3. T ur n on the V350-PRO. 4. Rotate the Output Control knob until the display reads “cur cAL”. 5. Release the Mode Select button. 6. The left display will c[...]

NOTES F-50 F-50 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

CONTROL BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty . For your safety and to avoid electrical shock, please observe all sa[...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-52 F-52 PROCEDURE 1. Remove input power to the V350-PRO. 2. Using a 5/16” nut driver remove the case wrap- around cover . 3. Perform th[...]

Observe static precautions detailed in PC Board T roubleshooting Procedures at the beginning of this section. 8. The front of the machine may now gently be pulled forward to gain access to the Contr ol Boar d. Note: The front of the machine cannot be r emoved com- pletely , only pulled forward a few inches. 9. Using a 5/16” nut driver or a flathe[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 11.. Beginning at the right side of the machine remove plugs J10A and J10B. Note: Be sur e to label each plugs position upon removal. See Figure F .19. 12. W orking your[...]

F-55 F-55 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC 14. Using a 3/8” nut driver remove the four mounting nuts from the four corners of the control boar d. See Figure F .20. 15. Remove the control boar d. Note:[...]

17. Replace the four 3/8” mounting nuts at the cor- ners of the board. 18. Replace plugs #J3, #J4, #J5, #J6, #J7, #J8, #J9, #J10B, and #J10A previously r emoved. 19. Using a 5/16” nut driver , replace the metal plate on the top of the machine that holds the case front assembly to the center panel. Replace all cable ties previously r emoved. 20.[...]

DISPLA Y BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 [...]

Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC V350-PRO TROUBLESHOOTING & REP AIR F-58 F-58 FIGURE F.21 – DISPLAY BOARD LOCATION W ARNING REMOTE POWER OFF ON A AMPS A V VOLTS WELD T ERM IN ALS SELECT OUTPUT LINCOLN ELEC[...]

TROUBLESHOOTING & REP AIR DISPLA Y BOARD REMOV AL & REPLACEMENT (continued) F-59 F-59 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE F.22 – CASE FRONT SCREW LOCATION Input P ower Switch Screws W elde[...]

10. Remove plug #J37 from the display boar d. 11. Remove plug #J3 originating from the contr ol board located dir ectly across fr om the display board. 12. Remove the display board. Note: Gentle prying from behind the boar d may be requir ed. 13. Replace the display board. 14. Replace plugs #J3 and #J37 previously r emoved. 15. Replace the four phi[...]

MAIN SWITCH BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult in danger to the technician or machine operator and will invalidate your factory warranty . For your safety and to avoid electrical shock, please observe a[...]

PROCEDURE 1. Remove the input power to the V350-PRO. 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. Observe static precautions detailed in PC Board T roubleshooting Procedures at the beginning of this section. Failure to do so can r esult[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-63 F-63 FIGURE F.24 – 3/16” ALLEN BOLT LOCATION FIGURE F.25 – NYLON MOUNTING PIN - + - + - + - + 3/16" ALLEN BOL TS MAIN SWITC[...]

NOTES F-64 F-64 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

MODE BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 safe[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-66 F-66 FIGURE F.26 – MODE BOARD LOCATION WARN IN G REMOTE POWER OFF ON A AMPS A V VOLTS WELD T ERM IN ALS SELECT OUTPUT LINCOLN ELECTR[...]

TROUBLESHOOTING & REP AIR F-67 F-67 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FIGURE F.27 – CASE FRONT SCREW REMOVAL Input P ower Switch Screws W elder Output T er minal Screws 5/16" Screws 5/16"[...]

TROUBLESHOOTING & REP AIR F-68 F-68 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC MODE BOARD REMOV AL AND REPLACEMENT (continued) FIGURE F.28. – CASE FRONT 9. Remove plug #J34 from the mode boar d. 10. Remove [...]

TROUBLESHOOTING & REP AIR F-69 F-69 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC MODE BOARD REMOV AL AND REPLACEMENT (continued) FIGURE F.29 – SCREW IN CAP Small Flathead Scre wdr iv er 18. Replace the mode b[...]

NOTES F-70 F-70 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

ST A TUS BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 [...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-72 F-72 FIGURE F.30 – STATUS BOARD LOCATION W ARNING REMOTE POWER OFF ON A AMPS A V VOLTS WELD T ERM IN ALS SELECT OUTPUT LINCOLN ELECT[...]

V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR F-73 F-73 ST A TUS BOARD REMOV AL AND REPLACEMENT (continued) 5. Using a 5/16” nut driver remove the four scr ews from the top and bottom[...]

10. Remove plug #J311 and plug #J31 from the sta- tus board. 11. Remove plug #J37 originating from the display board located dir ectly above the status board. 12. Remove the status board. Note: Gentle prying from behind the boar d will be requir ed. 13. Replace the status board. 14. Replace plug #J37 previously r emoved. 15. Replace plug #J31 and p[...]

SNUBBER BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 s[...]

PROCEDURE 1. Remove input power to the V350-PRO. 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 snubber board.. See Figur e F .32. 5. Remove small lead #B1 fr om the board. See Figure F .33. 6. Remove the four bolts using a [...]

POWER BOARD REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may r esult 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 saf[...]

PROCEDURE 1. Remove input power to the V350-PRO. 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 power board. See Figur e F .34. TROUBLESHOOTING & REP AIR F-78 F-78 V350-PRO Return to Section TOC Return to Section TOC Ret[...]

5. Locate the thr ee plug connections. J41, J42 and J43. See figure F .35. 6. Carefully r emove the three plugs fr om the power board. 7. Remove the four screws and associated washers at the corners of the board using a flathead screw- driver . Board is r eady for removal. Note the posi- tion of washers upon removal. 8. Remove the power board. 9. R[...]

NOTES F-80 F-80 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

TROUBLESHOOTING & REP AIR F-81 F-81 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INPUT RECTIFIER REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained personne[...]

PROCEDURE 1. Remove input power to the V350-PRO. 2. Using a 5/16” nut driver remove the case wraparound cover . 3. Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section. 4. Locate the input rectifier . See figure F .36. 5. Carefully remove the silicon sealant insulating the six input rectifier terminals. 6. Remov[...]

9. Apply a thin coat of Penetrox A-13 heatsink com- pound to the point of contact between the input rectifier and the mounting surface. 10. Secur e the new input bridge into its proper posi- tion with the two 3/16”in. allen mounting screws previously r emoved. T orque to 44 inch pounds. 11. Reconnect the previously r emoved leads to their proper [...]

NOTES F-84 F-84 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

F-85 F-85 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR OUTPUT RECTIFIER MODULES REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained[...]

PROCEDURE 1. Remove input power to the V350-PRO. 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 output rectifier modules located behind the snubber board. See figur e F .38. 5. Before the output rectifier modules can be reac[...]

8. Under the copper plate pr eviously removed, ther e is an allen bolt. Remove it using a 9/64” allen wrench. 9. Using a 7/16” socket remove the mounting bolts at the top and bottom of the modules. See Figure F .39. 10. The output rectifier modules ar e r eady for r emoval and/or replacement. 11. Before replacing the diode module, apply a thin [...]

NOTES F-88 F-88 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC[...]

F-89 F-89 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC TROUBLESHOOTING & REP AIR CURRENT TRANSDUCER REMOV AL AND REPLACEMENT Service and repair should be performed by only Lincoln Electric factory trained perso[...]

PROCEDURE 1. Remove input power to the V350-PRO. 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. Remove the caps on the two wir e feeder recepta- cles. 5. Using a phillips head screwdriver remove the two mounting screws fr om each wire [...]

7. Label and remove the four leads connected to the two wire feeder cir cuit breakers. Pliers may be necessary . 8. Label and remove the two leads connecting to the CB2 circuit br eaker . Pliers may be necessary . 9. Label and remove the seven leads fr om the reconnect panel. Pliers may be necessary . 10. Using a crescent wrench, r emove the lar ge[...]

14. 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 . 15. Carefully swing the r ear of the machine open to the right while facing the rear of the machine. 16. Perform the Snubber Board Removal Procedure . 17. Remove leads #X2 and #20 from t[...]

24. Replace the current transducer . 25. Replace the two 3/8” mounting nuts previously removed. 26. Reconnect plug #J90 to the current transducer . 27. Replace any necessary cable ties previously cut. 28. Replace the output diode heatsink assembly pr e- viously removed using a 3/8” wr ench. Note: Be sure to place insulation in its original loca[...]

TROUBLESHOOTING AND REP AIR RETEST AFTER REP AIR F-94 F-94 V350-PRO Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Retest a machine: If it is rejected under test for any r eason that requir es you to remove any part which cou[...]

G-1 ELECTRICAL DIAGRAMS G-1 T ABLE OF CONTENTS -ELECTRICAL DIAGRAMS SECTION- ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION G WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2 [...]

ELECTRICAL DIAGRAMS G-2 V350-PRO WIRING DIAGRAM - INVERTEC V350-PRO FAN FR O NT O F M A CH IN E MAIN XFMR 205 201 2. FOR MACHINES NOT SUPPL IED WITH INPUT CABLE FOR SINGLE PH ASE I NPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES. CONNECT TERMINALS U & W TO SUPPLY CIRCUIT. FOR THRE E PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCA[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-3 V350-PRO SCHEMA TIC - COMPLETE MACHINE SPI POWER SUPPLY J31-10 J31-9 J31-8 J31-1 J31-2 J31-7 J31-6 J31-5 J31-4 J31-3 J31-9 J31-8 J31-1 J 31 - 2 J31-7 J [...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-4 V350-PRO SCHEMA TIC - CONTROL PC BOARD #1 SOLID EDGE EN-170 MANU FACTURING T OLERANCE P ER E2056 UNLESS OTHERWIS E SPECIFIED TOLERANCE SCALE: DO NOT SCA[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-5 V350-PRO SCHEMA TIC - CONTROL PC BOARD #2 DATA[0:15] ISOLATION BARRR IER ADDR[1:18] CAN COMMUNICATION CIRCUITRY CAN COMMUNICATION CIRCUITRY FULL DUPLEX [...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-6 V350-PRO SCHEMA TIC - CONTROL PC BOARD #3 AD_DATA[0:13] SAWTOOTH GENERATOR PRIMARY CURRENT SHUTDOWN 0.3 - 0 .9A PRIMARY CURRENT SENSE IDEAL VOLTAGE 2/6/[...]

ELECTRICAL DIAGRAMS G-7 V350-PRO SCHEMA TIC - CONTROL PC BOARD #4 BD ID=03 D D D GSPI D D D D D D D D D D D D D D R173 10.0K R91 10.0K R92 10.0K R93 10.0K R94 10.0K R95 10.0K R96 10.0K R97 10.0K R98 10.0K R83 475 R86 475 R182 4.75k R201 10.0K R184 4.75K R104 10.0K R137 4.75k R221 10.0K R229 10.0K R253 10.0K R222 4.75k R262 332 R263 332 R264 332 R26[...]

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 troub[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-9 V350-PRO SCHEMA TIC - POWER SUPPL Y PRINTED CIRCUIT BOARD .1 C53 Vfb2 Vref 1 100K R29 CNY17-3 OCI2 42 1 6 5 .5W 27V DZ2 VFB CS COMP RT /CT VCC OUT VREF [...]

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 troub[...]

ELECTRICAL DIAGRAMS G-11 V350-PRO SCHEMA TIC - SWITCH PRINTED CIRCUIT BOARD G-11 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual. Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to[...]

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 troub[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-13 V350-PRO SCHEMA TIC - DISPLA Y PRINTED CIRCUIT BOARD G-13 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by[...]

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 troub[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-15 V350-PRO SCHEMA TIC -ST A TUS PRINTED CIRCUIT BOARD G-15 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by [...]

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 troub[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-17 V350-PRO SCHEMA TIC - MODE SELECT PRINTED CIRCUIT BOARD G-17 NOTE: This diagram is for reference only . It may not be accurate for all machines covered[...]

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 troub[...]

Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC ELECTRICAL DIAGRAMS G-19 V350-PRO SCHEMA TIC - REMOTE PRINTED CIRCUIT BOARD G-19 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by t[...]

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 troub[...]

ELECTRICAL DIAGRAMS G-21 V350-PRO SCHEMA TIC-SNUBBER PRINTED CIRCUIT BOARD S24761 6-2-2000 G-21 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual. Return to Section TOC Retur n to Section TOC Retur n to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Maste[...]

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 troub[...]

SVM ERROR REPORTING FORM We need to know if there are errors in our manuals. W e 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 w[...]