Lincoln Electric SVM155-A manual

SERVICE MANUAL • World's Leader in W elding and Cutting Products • • Sales and Service through Subsidiaries and Distributors Worldwide • Cleveland, Ohio 441 17-1 199 U.S.A. TEL: 216.481.8100 F AX: 216.486.1751 WEB SITE: www .lincolnelectric.com MUL TI-SOURCE M UL TI - SO URCE O U T P U T T H E R M A L F A N P O W E R O N O F F % O U T [...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY i i MUL TI-SOURCE 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, wel[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY ii ii MUL TI-SOURCE 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 sta[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY iii iii MUL TI-SOURCE FOR ELECTRICALL Y powered equipment. 8.a. T urn of f 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 an[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY iv iv MUL TI-SOURCE 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: [...]

MASTER T ABLE OF CONTENTS FOR ALL SECTIONS v v MUL TI-SOURCE Page Safety .................................................................................................................................................i-iv Installation ..................................................................................................................[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - INST ALLA TION SECTION - Section A-1 Section A-1 MUL TI-SOURCE Installation ................................................................................................................... ...Section A T echnical Specifications ..............[...]

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 INST ALLA TION A-2 A-2 MUL TI-SOURCE TECHNICAL SPECIFICA TIONS - Multi-Source K1752-1 PHYSICAL DIMENSIONS TEMPERA TURE RANGES HEIGHT 30.8 in 781 mm WIDTH 22.2in 565 mm DEPTH 41 i[...]

SELECT PROPER LOCA TION Place the power supply where clean cooling air can freely circulate in through the front louvers and out through the rear louvers. Dirt, dust or any foreign mate- rial that can be drawn into the welder should be kept at a minimum. Failure to observe these precautions can result in excessive operating temperatures and nui- sa[...]

INST ALLA TION A-4 A-4 MUL TI-SOURCE 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 FUSE AND WIRE SIZES Protect the input circuit with the super lag fuses or delay type circuit breakers listed on the T echnical Specifications[...]

OUTPUT CONNECTIONS The Multi-Source has two parallel connected output studs for positive and negative connections. Each one is rated to carry the full output current. For its maximum rated current at 100% duty cycle a minimum size of 4/0 A WG welding cable is recommended. Connection of Electrode and Work Leads to Output terminals. 1. Set the POWER [...]

NOTES A-6 A-6 MUL TI-SOURCE 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[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - OPERA TION SECTION - Operation ............................................................................................................................... Section B Safety Instructions ........................................................[...]

OPERA TION B-2 B-2 MUL TI-SOURCE 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 SAFETY INSTRUCTIONS ELECTRIC SHOCK can kill. • Do not touch electrically live parts or electrode with skin or wet clothing. • Insulate yourse[...]

OPERA TION B-3 B-3 MUL TI-SOURCE 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 GENERAL DESCRIPTION The Multi-Source is designed to supply power to the Multi-Weld welders. It has a wide range three phase AC input and can be o[...]

OPERA TION B-4 B-4 MUL TI-SOURCE 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 RECOMMENDED EQUIPMENT/CONNECTIONS The Multi-weld 350 (K1735-1) is the recommended means by which to control the MUL TI-SOURCE power supply . Conn[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS - ACCESSORIES - Accessories ........................................................................................................................... Section C Factory Installed Options/Accessories ...............................................[...]

F ACTOR Y INST ALLED OPTIONS / ACCESSORIES There ar e no factory installed options. FIELD INST ALLED OPTIONS / ACCESSORIES K1735-1 Multi-W eld 350, Multi-process controller . K857, K857-1 Remote contr ol, Control multi-weld remotely (25 or 100 ft.) K1736-1 Distribution box, Connects up to 10 Multi- W elds. K449 LN-25, Across the ar c wire feeder . [...]

D-1 D-1 T ABLE OF CONTENTS -MAINTENANCE- MUL TI-SOURCE Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Maintenance ......................................................................................................................... Section D Safety Precautions.................................................[...]

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 MAINTENANCE D-2 D-2 MUL TI-SOURCE W ARNING SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Only qualified personnel should perform this mainte- nance. • T ur n the input power [...]

FIGURE D.1 – MAJOR COMPONENT LOCA TION MAINTENANCE D-3 D-3 MUL TI-SOURCE 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 1. Case Front Assembly 2. Case back Assembly 3. Fan 4. Base 5. Sides 6. Roof 7. Rectifier Assembly MU L[...]

NOTES D-4 D-4 MUL TI-SOURCE 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[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC Section E-1 Section E-1 MUL TI-SOURCE FIGURE E.1 – MUL TI-SOURCE BLOCK LOGIC DIAGRAM LED LED LED DIGIT AL METER G Y W CONTROL BOARD THERMOST A T CONTROL SIGNAL RESISTOR BANK FIRING BOARD GA TE SIGNALS TO CONTROL BOARD SHUNT SCR OUTPUT RECTIFIER FIL TER CAP ACITOR [...]

GENERAL DESCRIPTION The Multi-Source is designed to supply power to the Multi-W eld Arc Converter welders. The Multi-Source is an SCR controlled constant voltage (CV) DC power supply that can operate with a wide range of three phase input voltages. The machine's peak output voltage helps regulate against wide variations in out- put loading and[...]

E-3 E-3 FIGURE E.3 – MAIN TRANSFORMER, CONTROL BOARD, COOLING F AN MOTOR, & LEDs TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MAIN TRANSFORMER, CONTROL BOARD, COOLING F AN M[...]

E-4 E-4 FIGURE E.4 – SCR BRIDGE, RESISTOR BANK, FIRING BOARD, & OUTPUT CAP ACITOR/RESISTOR TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE, RESISTOR BANK, FIRING BOA[...]

E-5 E-5 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 PROTECTION DEVICES AND CIR- CUITS Several thermostats protect the Multi-Sour ce from over temperature and /or excessive loadin[...]

E-6 E-6 FIGURE E.5 SCR OPERA TION TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR OPERA TION A silicon controlled r ectifier (SCR) is a three terminal device used to control rath[...]

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC T ABLE OF CONTENTS -TROUBLESHOOTING & REP AIR SECTION- T roubleshooting & Repair Section ....................................................................................... Section F How to Use T roubleshooting Guide .....................................[...]

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-2 F-2 MUL TI-SOURCE HOW TO USE TROUBLESHOOTING GUIDE Service and repair should be performed by only Lincoln Electric Factory T rained Personnel. U[...]

ELECTRIC SHOCK can kill. Have an electrician install and ser- vice this equipment. T ur n the machine OFF before working on equipment. Do not touch electrically hot parts. Sometimes machine failures appear to be due to PC board failur es. These problems can sometimes be traced to poor electrical connections. T o avoid prob- lems when troubleshootin[...]

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-4 F-4 MUL TI-SOURCE TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not[...]

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-5 F-5 MUL TI-SOURCE TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not[...]

TROUBLESHOOTING & REP AIR F-6 F-6 MUL TI-SOURCE 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 CAUTION If for any reason you do not understand the test pr ocedures or ar e unable to perform the test/r epairs safely , con-[...]

TROUBLESHOOTING & REP AIR F-7 F-7 MUL TI-SOURCE 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not[...]

INST ALLA TION F-8 F-8 MUL TI-SOURCE 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 GUIDE Observe Safety Guidelines detailed in the beginning of this manual. CAUTION If for any reason you do not understand the[...]

CONTROL TRANSFORMER (T2) VOL T AGE TEST F-9 F-9 MUL TI-SOURCE 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 and repair should be performed only by Lincoln Electric factory trained personnel. Unauthorized repairs perf[...]

Control T ransformer (T2) X3 H2 H1 X1 F-10 F-10 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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. Disconnect main AC input power to the machine. 2. Remove the T op an[...]

F-11 F-11 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 6. Carefully apply primary power and test for the correct secondary voltages. See T able F .1. NOTE: If the correct main AC [...]

F-12 F-12 CONTROL TRANSFORMER (T2) VOL T AGE TEST MUL TI-SOURCE 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 NOTE: If the secondary voltage is not pre- sent at terminal #X3 but is present at terminal #X2 the internal thermo[...]

F-13 F-13 INPUT CONT ACTOR TEST TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained personnel. Un[...]

F-14 F-14 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 CONT ACTOR TEST (Continued) CONT ACT OR COIL 240 241 1. Disconnect the main input supply power to the machine. 2. With[...]

F-15 F-15 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 T3 T2 T1 U V W TOP VIEW T est Points T est Points T est Points TEST FOR CONT ACT CONTINUITY 1. Disconnect the main input sup[...]

F-16 F-16 NOTES MUL TI-SOURCE 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-17 F-17 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MAIN TRANSFORMER (T1) VOL T AGE TEST W ARNING Service and repair should be performed only by Lincoln Electric factory traine[...]

F-18 F-18 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MAIN TRANSFORMER (T1) VOL T AGE TEST (continued) Reconnect Panel Assembly Input Contactor TEST PROCEDURE 1. Disconnect main [...]

F-19 F-19 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MAIN TRANSFORMER (T1) VOL T AGE TEST (continued) T ransformer Secondary Leads Lift Bail Common Buss T ransformer Assembly #2[...]

F-20 F-20 NOTES MUL TI-SOURCE 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-21 F-21 ST A TIC SCR TEST TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained personnel. Unauth[...]

F-22 F-22 ST A TIC SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 1. Remove main supply power to the machine. 2. Remove the roof and case sides. 3. Lower the fr[...]

F-23 F-23 ST A TIC SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Leads 4. Using the 9/16” wrench, r emove the two positive output leads connecting the out- p[...]

F-24 F-24 ST A TIC SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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. Repeat previous step(s) testing SCR 2, SCR 3, SCR 4, SCR 5, and SCR 6. T o further check th[...]

F-25 F-25 ACTIVE SCR TEST TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained personnel. Unauthor[...]

F-26 F-26 ACTIVE SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 FIRING BOARD J5 J6 J8 J4 J7 Plug J4 1. Remove main supply power to the Multi- Source. 2. Remove [...]

F-27 F-27 ACTIVE SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Leads 4. Using a 9/16” wrench, r emove the two positive output leads connecting the out- put b[...]

F-28 F-28 ACTIVE SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Remove Red Paint Anode Cathode 5. Remove the r ed insulating paint fr om heat sink test points. [...]

F-29 F-29 ACTIVE SCR TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 T o test SCRs construct the circuit outlined above. Resistor values are plus or minus ten percen[...]

F-30 F-30 NOTES MUL TI-SOURCE 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-31 F-31 CONTROL BOARD TEST TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained personnel. Unaut[...]

F-32 F-32 CONTROL BOARD TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 J1 J2 J3 J5 J6 J8 Firing Board Control Board J4 J7 TEST PROCEDURE FOR NORMAL CON- TROL BOARD [...]

F-33 F-33 CONTROL BOARD TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 .15. Control Board with LED, Plug and Lead Locations 10. LED 6 indicates that the fa[...]

F-34 F-34 NOTES MUL TI-SOURCE 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-35 F-35 FIRING BOARD TEST TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained personnel. Unauth[...]

F-36 F-36 FIRING BOARD TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 J1 J2 J3 J5 J6 J8 Firing Board Control Board J4 J7 TEST PROCEDURE FOR NORMAL FIRING BOARD OPER[...]

F-37 F-37 FIRING BOARD TEST (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 T ABLE F .2. - LED 7, 8 and 9 Check List IF LED 7 is ON LED 7 is OFF or is DIM- MER than other[...]

TROUBLESHOOTING & REP AIR FIRING BOARD TEST (Continued) F-38 F-38 MUL TI-SOURCE 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 FIRING BOARD J6 J4 J7 Jumper Plug J5 J8 #284 #283 #286 #287 #285 #340 #215 #231 #288 FIGURE F [...]

F-39 F-39 MUL TI-SOURCE METER ACCURACY CHECK TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 Service and repair should be performed only by Lincoln Electric factory trained [...]

F-40 F-40 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MUL TI-SOURCE METER ACCURACY CHECK (Continued) METER ACCURACY CHECK 1. With power off, connect a resistive load and the mete[...]

F-41 F-41 NORMAL OPEN CIRCUIT VOL T AGE W A VEFORM - NO LOAD TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 0 volts 2 ms 50 volts This is the typical DC open circuit volt- age wavef[...]

F-42 F-42 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 ABNORMAL OPEN CIRCUIT VOL T AGE W A VEFORM ONE OUTPUT SCR NOT FUNCTIONING - NO LOAD 0 volts 2 ms 50 volts This is NOT the ty[...]

F-43 F-43 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 TYPICAL SCR GA TE VOL T AGE W A VEFORM - NO LOAD 0 volts 2 ms 1 volt This is the typical SCR gate pulse volt- age waveform. [...]

F-44 F-44 NOTES MUL TI-SOURCE 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-45 F-45 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 CONT ACTOR CLEANING AND/OR REPLACEMENT W ARNING Service and repair should be performed only by Lincoln Electric factor[...]

F-46 F-46 INPUT CONT ACTOR CLEANING AND/OR REPLACEMENT (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 T3 T2 T1 U V W TOP VIEW REMOV AL PROCEDURE 1. Disconnect input powe[...]

F-47 F-47 INPUT CONT ACTOR CLEANING AND/OR REPLACEMENT (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 .21. INPUT CONT ACTOR CLEANING/INSPECTION CONT ACTOR COIL [...]

F-48 F-48 NOTES MUL TI-SOURCE 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-49 F-49 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 REPLACEMENT PROCEDURE W ARNING Service and repair should be performed only by Lincoln Electric factory trained[...]

F-50 F-50 CONTROL BOARD REPLACEMENT PROCEDURE (Continued) TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 J1 J2 J3 J5 J6 J8 Firing Board Control Board J4 J7 REMOV AL PROCEDURE 1. Dis[...]

F-51 F-51 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 FIRING BOARD REPLACEMENT PROCEDURE W ARNING Service and repair should be performed only by Lincoln Electric factory trained [...]

F-52 F-52 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 FIRING BOARD REPLACEMENT PROCEDURE (Procedure) J1 J2 J3 J5 J6 J8 Firing Board Control Board J4 J7 REMOV AL PROCEDURE 1. Disc[...]

F-53 F-53 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE / HEA T SINK ASSEMBL Y REPLACEMENT PROCEDURE W ARNING Service and repair should be performed only by Lincoln Elec[...]

F-54 F-54 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE / HEA T SINK ASSEMBL Y REPLACEMENT PROCEDURE REMOV AL PROCEDURE 1. Disconnect input power to the machine. 2. Usin[...]

F-55 F-55 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE / HEA T SINK ASSEMBL Y REPLACEMENT PROCEDURE 6. Using a 9/16” nut driver , remove the two positive output leads[...]

F-56 F-56 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE / HEA T SINK ASSEMBL Y REPLACEMENT PROCEDURE 13. Clear all leads and carefully maneuver SCR bridge out of the rig[...]

F-57 F-57 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 REMOV AL OF INDIVIDUAL SCR HEA T SINK ASSEMBLIES 1. Using a 9/16” nut driver , remove the nuts and respective washers secu[...]

F-58 F-58 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 SCR BRIDGE / HEA T SINK ASSEMBL Y REPLACEMENT PROCEDURE INST ALLA TION OF SCR OUTPUT BRIDGE NOTE: Upon reassembly , apply a [...]

F-59 F-59 TROUBLESHOOTING & REP AIR MUL TI-SOURCE 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 MAXIMUM OPEN CIRCUIT VOL T AGE Open Circuit V olts 79.5/80 VDC PERFORM METER ACCURACY TEST RETEST AFTER REP AIR T esting is [...]

F-60 F-60 NOTES MUL TI-SOURCE 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[...]

MUL TI-SOURCE G-1 ELECTRICAL DIAGRAMS G-1 T ABLE OF CONTENTS -ELECTRICAL DIAGRAMS SECTION- ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SECTION G WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

ELECTRICAL DIAGRAMS G-2 WIRING DIAGRAM - CON TROL P C B OAR D FIRIN G P C BOA RD 283 284 285 286 287 288 2 R3 R4 R5 R6 R7 R8 03 204 205 206 207 208 TO T1 AUX ILIAR IES J1 1 2 3 4 5 6 7 8 9 10 J3 J2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 201 261 263 231 202 215A 230 341 222A 260 264 235 234 215B[...]

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 ELECTRICAL DIAGRAMS G-3 SCHEMA TIC - CONTROL PC BOARD G-3 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual.[...]

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 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 ELECTRICAL DIAGRAMS G-5 SCHEMA TIC - FIRING PRINTED CIRCUIT BOARD G-5 NOTE: This diagram is for reference only . It may not be accurate for all machines covered by this manual.[...]

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[...]

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[...]