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Lincoln Electric SVM 106-A manual

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Table of contents for the manual

  • Page 1

    LN-7 GMA Wire Feeder VOL TS NEGA TIVE ELECTRODE POLARITY POSITIVE THE LINCOLN ELECTRIC CO. CLEVELAND, OH U.S.A. Do not touch live electrical parts or electrode with skin or wet clothing Insulate yourself from work and ground. Always wear dry insulating gloves. Do not use AC welder if your clothing, gloves or work area is damp or if working on, unde[...]

  • Page 2

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC i LN-7 GMA WIRE FEEDER SAFETY FUMES AND GASES can be dangerous. 3.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 kee[...]

  • Page 3

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC LN-7 GMA WIRE FEEDER SAFETY ii FOR ELECTRICALL Y powered equipment. 6.a. T urn off input power using the disconnect switch at the fuse box before working on the equipment. 6.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes a[...]

  • Page 4

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC FOR ENGINE powered equipment. 7.a. T urn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 7.b. Operate engines in open, well-ventilated areas or ven[...]

  • Page 5

    Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC SAFETY iv LN-7 GMA WIRE FEEDER 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- ant[...]

  • Page 6

    v LN-7 GMA WIRE FEEDER Page Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i-iv Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A T echnical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 7

    Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section A T echnical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Mounting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 Machine Grounding . . . . .[...]

  • Page 8

    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 TECHNICAL SPECIFICA TIONS – LN-7 GMA LN-7 GMA WIRE FEEDER INPUT VOL T AGE WIRE FEED SPEED WIRE DIAMETERS PHYSICAL DIMENSIONS Supplied by power source: 1 15 V[...]

  • Page 9

    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 MOUNTING LOCA TION The LN-7 GMA wire feeders can be mounted directly on top of the power source providing that it is secure and level. The LN-7 can be mounted to an undercarriage[...]

  • Page 10

    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. For K291 and K404 cables, connect the end of the control cable with the lugged leads to the power source. If lead #21 is extended to work, do not connect leads to terminal #21[...]

  • Page 11

    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 STRAIN RELIEF CLAMP CONTROL CABLE ELECTRODE CABLE 5. Connect the input control cable polarized Amphenol plug into the mating 6-pin receptacle on the rear of the control section. [...]

  • Page 12

    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 FIGURE A.3 – LN-7 GMA TO DC-400, DC-250 AND CV/CVI POWER SOURCES WITH TERMINAL STRIP - CONNECTION DIAGRAM. LN-7 GMA WIRE FEEDER 77 – + CLEVELAND, OHIO U.S.A EL[...]

  • Page 13

    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 LN-7 GMA WIRE FEEDER INST ALLA TION A-7 FIGURE A.4 – LN-7 GMA TO PULSED POWER 500 - CONNECTION DIAGRAM. – + CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF[...]

  • Page 14

    Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INST ALLA TION FIGURE A.5 – LN-7 GMA TO CV/CVI POWER SOURCES WITH 14 PIN AMPHENOL CONNECTOR - CONNECTION DIAGRAM. LN-7 GMA WIRE FEEDER ELECTRIC SHOCK CAN KILL TURN INPUT POWER [...]

  • Page 15

    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-9 LN-7 GMA WIRE FEEDER FIGURE A.6 – LN-7 GMA TO CV/CVI POWER SOURCES WITH TWIST -MA TE CONNECTOR AND 14 PIN AMPHENOL/REMOTE CONTROL - CONNECTION DIAGRAM. CLEVE[...]

  • Page 16

    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-10 FIGURE A.7 – LN-7 GMA TO CV/CVI POWER SOURCE (K867/K775) - CONNECTION DIAGRAM. – + CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFO[...]

  • Page 17

    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 A.8 – LN-7 GMA TO R3S-250 OR R3S-325 - CONNECTION DIAGRAM. –+ CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING THE LN-7 GMA WIRE FE[...]

  • Page 18

    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-12 FIGURE A.9 – LN-7 GMA TO SAM MOTOR GENERA TOR OR ENGINE WELDER - CONNECTION DIAGRAM. CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFO[...]

  • Page 19

    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 A.10 – LN-7 GMA TO DC-600 - CONNECTION DIAGRAM. – + CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING THE LN-7 GMA WIRE FEEDER. W AR[...]

  • Page 20

    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-14 FIGURE A.1 1 – LN-7 GMA TO R3S-400, 600, OR 800 - CONNECTION DIAGRAM. CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING T[...]

  • Page 21

    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 A.12 – LN-7 GMA TO MOST LINCOLN MOTOR GENERA TORS - CONNECTION DIAGRAM. 32 CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING THE LN-7 [...]

  • Page 22

    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 A.13 – LN-7 GMA TO WP250 OR G9 PRO - CONNECTION DIAGRAM. CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING THE LN-7 GMA WIRE FEEDER. W[...]

  • Page 23

    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 A.14 – LN-7 GMA TO RANGER 9 – CONNECTION DIAGRAM. INST ALLA TION A-17 LN-7 GMA WIRE FEEDER ELECTRIC SHOCK CAN KILL DO NOT OPERA TE WITH P ANELS OPEN. DISCONNECT NEGA T[...]

  • Page 24

    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 LN-7 GMA WIRE FEEDER INST ALLA TION A-18 FIGURE A.15 – LN-7 GMA TO RANGER 10-LX – CONNECTION DIAGRAM. ELECTRIC SHOCK CAN KILL DO NOT OPERA TE WITH P ANELS OPEN. DISCONNECT NE[...]

  • Page 25

    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 A.16 – LN-7 GMA TO POWER SOURCES WITH NO OUTPUT CONT ACTOR - CONNECTION DIAGRAM. CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT POWER OFF BEFORE CONNECTING THE[...]

  • Page 26

    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-20 FIGURE A.17 – LN-7 GMA TO POWER SOURCES WITH CONT ACTOR AND NO TERMINAL STRIP - CONNECTION DIAGRAM. CLEVELAND, OHIO U.S.A ELECTRIC SHOCK CAN KILL TURN INPUT[...]

  • Page 27

    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 WORK CABLE Connect a work lead of sufficient size and length (T able A.2) between the proper output stud on the power source and the work. Be sure the connection to the work make[...]

  • Page 28

    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 LN-7 GMA WIRE FEEDER A-22 W A TER CONNECTIONS (FOR W A TER COOLED GUNS) The LN-7 GMA must have a K527 Water Solenoid Kit installed (see the Accessories Section). T[...]

  • Page 29

    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 SHIELDING GAS HOOKUP Gas under pressure is explosive. Always keep gas cylinders in an upright position and to the undercarriage or a stationary support. See American National Sta[...]

  • Page 30

    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-24 NOTES LN-7 GMA WIRE FEEDER[...]

  • Page 31

    Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section B Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2 General Description . . . . [...]

  • Page 32

    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 TING INSTRUCTIONS Read and understand the entire Operation Section prior to operating the machine. SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Do not touch electrically[...]

  • Page 33

    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 CONTROLS AND SETTINGS Operator controls are illustrated in Figure B.1. Refer to the figure and the following explanations of the controls. WIRE FEED SPEED CONTROL. This control s[...]

  • Page 34

    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-4 LN-7 GMA WIRE FEEDER CIRCUIT PROTECTION A manual reset circuit breaker protects the AC supply line and the wire feeder from overloads, usually caused by excessive [...]

  • Page 35

    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 LN-7 GMA WIRE FEEDER OPERA TION B-5 FIGURE B.2 – INST ALLING DRIVE ROLLS ON A TWO-ROLL FEEDER.[...]

  • Page 36

    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-6 LN-7 GMA WIRE FEEDER CHANGING DRIVE ROLLS FOR FOUR- ROLL WIRE FEEDERS: T o change drive rolls on a four-roll wire feeder , refer to Figure B.3 and perform the foll[...]

  • Page 37

    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 LN-7 GMA WIRE FEEDER OPERA TION B-7 FIGURE B.3 – INST ALLING DRIVE ROLLS ON A FOUR-ROLL FEEDER. CLAMPING COLLAR SP ACER (IF REQUIRED) DRIVE ROLL HAL VES KEY OUTPUT SHAFT OUTGOI[...]

  • Page 38

    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-8 LN-7 GMA WIRE FEEDER IDLE ROLL PRESSURE SETTING The idle roll pressure is set at the factory . T wo-roll feeders are set with the pressure adjustment knob backed o[...]

  • Page 39

    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 LN-7 GMA WIRE FEEDER OPERA TION B-9 WIRE LOADING WIRE REEL LOADING – READI-REELS AND SPOOLS TO MOUNT A 30 LB READI-REEL P ACKAGE USING THE MOLDED PLASTIC K363-P TYPE ADAPTER: 1[...]

  • Page 40

    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-10 LN-7 GMA WIRE FEEDER TO MOUNT 10 T O 30 LB SPOOL (12” DIAMETER): (For 8 in. spools a K468 spindle adapter must be used.) 1. Remove the locking collar and Read-R[...]

  • Page 41

    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 LN-7 GMA WIRE FEEDER OPERA TION B-1 1 WIRE REEL LOADING – 50 AND 60 LB COILS (K303 OR K376 WIRE REEL ST AND) ADJUST ABLE WIRE REEL BRAKE The mount for standard 50 and 60 pound [...]

  • Page 42

    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-12 LN-7 GMA WIRE FEEDER FEEDING ELECTRODE 1. Turn the reel until the free end of the electrode is accessible. 2. While tightly holding the electrode, cut off the ben[...]

  • Page 43

    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 LN-7 GMA WIRE FEEDER OPERA TION B-13 ACCELERA TION SETTING The LN-7 GMA can be configured for optimum starting for different procedures by selecting between two speeds of control[...]

  • Page 44

    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 LN-7 GMA WIRE FEEDER OPERA TION B-14 MAKING A WELD 1. Inch the electrode through the gun and cable. For solid wire, cut the electrode within approximately 3/8 in. of the end of t[...]

  • Page 45

    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 FLUX T ANK LOADING K320 FLUX T ANK (OPTIONAL) Either turn off the incoming air line or remove the quick disconnect if one has been installed. Slightly loosen the tank cap and let[...]

  • Page 46

    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-16 NOTES LN-7 GMA WIRE FEEDER[...]

  • Page 47

    Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section C General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2 Auxiliary Equipment Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3 K178-1 Mounting Platform . . [...]

  • Page 48

    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 C-2 ACCESSORIES LN-7 GMA WIRE FEEDER GENERAL The following is a list of the accessories that can be used with the LN-7 GMA wire feeder . A detailed description of each item is gi[...]

  • Page 49

    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 AUXILIAR Y EQUIPMENT CONNECTION The LN-7 GMA has the factory installed gas solenoid valve leads attached to terminals 7 and 32A. Additional auxiliary equipment connection is not [...]

  • Page 50

    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 C-4 LN-7 GMA WIRE FEEDER K418 GMA TIMER KIT This kit is available to provide the following functions: 1. Preflow Control – Provides flow of shielding gas to the wor[...]

  • Page 51

    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 LN-7 GMA WIRE FEEDER WIRE REEL DUST SHIELD FOR K376 50 T O 60 LB WIRE REEL MOUNTING ST AND A shield is available to cover the wire and reel to protect the wire from falling dirt [...]

  • Page 52

    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 C-6 LN-7 GMA WIRE FEEDER K480 INPUT CABLE The K480 input cable includes a 2/0 (67 mm 2 ) weld cable with a T wist-Mate TM connector and a 14-pin (MS-3106A-20- 27PX) p[...]

  • Page 53

    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 LN-7 GMA WIRE FEEDER SUBMERGED ARC GUNS The K1 12 gun and cable assembly is recommended for welding with 1/16 in. solid steel electrode at up to 500 amps. The K1 13 gun and cable[...]

  • Page 54

    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 NOTES C-8 LN-7 GMA WIRE FEEDER[...]

  • Page 55

    Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section D Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2 Drive Rolls and Guide T ubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2 Wire Reel Mounting . . . . . . . . . . . . [...]

  • Page 56

    D-2 MAINTENANCE LN-7 GMA WIRE FEEDER ROUTINE MAINTENANCE DRIVE ROLLS AND GUIDE TUBES After feeding every coil of wire, inspect the drive roll section. Clean the assembly as necessary . Do not use solvent to clean the drive roll assembly as it may wash the lubricant out of the bearings. The drive rolls and guide tubes are stamped with the wire sizes[...]

  • Page 57

    Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section E General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2 Control Circuit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2 Power Input Circuits . . . . .[...]

  • Page 58

    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 E-2 CONTROL CIRCUIT OPERA TION POWER INPUT CIRCUITS The LN-7 GMA receives 1 15 V AC power from the welding supply . This power is applied to the trigger transformer which reduces[...]

  • Page 59

    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 TRIGGER CIRCUIT The 24 V AC output of the trigger transformer is sent to the control PC board and rectified by a diode network. When the gun trigger is pulled, a circuit is close[...]

  • Page 60

    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 E-4 THEOR Y OF OPERA TION CONTROL RELA Y CIRCUIT The first contact closes to allow 1 15 V AC to energize the gas solenoid. This allows shielding gas to flow to the gun. The secon[...]

  • Page 61

    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 LN-7 GMA WIRE FEEDER THEOR Y OF OPERA TION E-5 AUXILIAR Y CIRCUITS TIMER KITS The optional GMA T imer and Burnback kits can be added to provide time delays for these functions. B[...]

  • Page 62

    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 E-6 THEOR Y OF OPERA TION LN-7 GMA WIRE FEEDER PROTECTIVE CIRCUITS Protective circuits are designed in to the LN-7 GMA to detect trouble and shut down the wire feeder before any [...]

  • Page 63

    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 LN-7 GMA WIRE FEEDER THEOR Y OF OPERA TION E-7 FIGURE E.6 – SILICON-CONTROLLED RECTIFIER OPERA TION. INPUT CA THODE GA TE GA TE OUTPUT ANODE AS THE GA TE PULSE IS APPLIED LA TE[...]

  • Page 64

    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 NOTES LN-7 GMA WIRE FEEDER E-8[...]

  • Page 65

    T roubleshooting And Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section F How T o Use T roubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2 PC Board T roubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . F-3 T roubleshooting Guide . . . . . . . . . . . . . . . . . . .[...]

  • Page 66

    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 If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely , contact the Lincoln Electric Service Department for technical trou[...]

  • Page 67

    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-3 LN-7 GMA WIRE FEEDER Sometimes machine failures appear to be due to PC board failures. These problems can sometimes be traced to poor electrical c[...]

  • Page 68

    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 LN-7 GMA WIRE FEEDER F-4 PROBLEMS (SYMPTOMS) Major physical or electrical damage is present. When gun trigger is pulled there is no wire feed, no gas [...]

  • Page 69

    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 LN-7 GMA WIRE FEEDER PROBLEMS (SYMPTOMS) When the gun trigger is pulled there is no wire feed, but gas flows and arc voltage is present. POSSIBLE AREAS OF MISADJUSTMENT(S) 1. Che[...]

  • Page 70

    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-6 TROUBLESHOOTING AND REP AIR LN-7 GMA WIRE FEEDER PROBLEMS (SYMPTOMS) When the gun trigger is pulled the wire feeds, the gas flows, but there is NO arc voltage. (The wire does[...]

  • Page 71

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-7 PROBLEMS (SYMPTOMS) When the gun trigger is pulled there IS wire feed and arc voltage but there is NOT any gas flow . Meter k[...]

  • Page 72

    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-8 TROUBLESHOOTING AND REP AIR LN-7 GMA WIRE FEEDER PROBLEMS (SYMPTOMS) Wire feed speed adjustment is rough. Works only at certain portions of the speed range. Ground Lead Prote[...]

  • Page 73

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-9 PROBLEMS (SYMPTOMS) Wire feeder circuit breaker tripping when the gun trigger is pulled. POSSIBLE AREAS OF MISADJUSTMENT(S) C[...]

  • Page 74

    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-10 TROUBLESHOOTING AND REP AIR LN-7 GMA WIRE FEEDER PROBLEMS (SYMPTOMS) Wire feeding rough or not feeding, but drive rolls turning. V ariable or “hunting” arc. Weld bead is[...]

  • Page 75

    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 wire feeds but starts and stops intermittently . TROUBLESHOOTING AND REP AIR LN-7 GMA WIRE FEEDER F-1 1 PROBLEMS (SYMPTOMS) POSSIBLE AREAS OF MISADJUSTMENT(S) 1. The gun trig[...]

  • Page 76

    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-12 TROUBLESHOOTING AND REP AIR LN-7 GMA WIRE FEEDER CONTROL RELA Y TEST Service and repair should only be performed by Lincoln Electric factory trained personnel. Unauthorized [...]

  • Page 77

    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 RELA Y TEST (continued) FIGURE F .1 – CONTROL RELA Y TEST POINTS. TEST PROCEDURE 1. Remove the control relay from the control box per the Control Relay Replacement proc[...]

  • Page 78

    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-14 LN-7 GMA WIRE FEEDER TRIGGER TRANSFORMER TEST Service and repair should only be performed by Lincoln Electric factory trained personnel. Unauthor[...]

  • Page 79

    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 TEST PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and sides of the unit. 2. Unplug the transfo[...]

  • Page 80

    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 LN-7 GMA WIRE FEEDER F-16 CONTROL CABLE CONTINUITY TEST Service and repair should only be performed by Lincoln Electric factory trained personnel. Una[...]

  • Page 81

    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 CABLE AMPHENOL PLUG C D E F A B CONNECT OR LETTERING SEQUENCE AS VIEWED FROM CA VITY END OF CONNECT OR TEST PROCEDURE 1. Disconnect the control cable amphenol plug from t[...]

  • Page 82

    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-18 LN-7 GMA WIRE FEEDER WIRE FEED SPEED POTENTIOMETER REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout th[...]

  • Page 83

    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 WIRE FEED SPEED POTENTIOMETER REPLACEMENT (continued) FIGURE F .4 – REMOVING WIRE FEED SPEED POTENTIOMETER. CONTROL BOX COVER 5/16 IN. SCREW POTENTIOMETER KNOB LOCKW ASHER NUT [...]

  • Page 84

    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 LN-7 GMA WIRE FEEDER F-20 WIRE FEED SPEED POTENTIOMETER REPLACEMENT (continued) 6. Place the new potentiometer through the case from the inside. Ensur[...]

  • Page 85

    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-21 LN-7 GMA WIRE FEEDER CIRCUIT BREAKER REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T u[...]

  • Page 86

    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 REP AIR PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the unit. 2. Remove the two w[...]

  • Page 87

    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-23 GROUND LEAD PROTECT OR PUSH BUTT ON SWITCH REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manua[...]

  • Page 88

    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 REP AIR PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the unit. 2. Remove the retaining nut from the front of t[...]

  • Page 89

    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 LN-7 GMA WIRE FEEDER F-25 TRIGGER TRANSFORMER REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual.[...]

  • Page 90

    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-26 LN-7 GMA WIRE FEEDER REP AIR PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the[...]

  • Page 91

    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 GROUND LEAD PROTECT OR REED SWITCH REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T urn off input power to the wire feed[...]

  • Page 92

    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 P ART OF MAIN WIRE HARNESS TIE WRAPS GROUND WIRE REED SWITCH LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-28 GROUND LEAD PROTECT OR REED SWITCH REPLACEMENT (continued) FIGU[...]

  • Page 93

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-29 CONTROL PC BOARD REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T [...]

  • Page 94

    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 LN-7 GMA CONTROL 32A 7 508 509 539 541 526 527 J101 J103 J104 J102 1 2 3 4 5 6 7 8 FIGURE F .8 – DISCONNECTING THE CONTROL PC BOARD. CONTROL PC BOARD REPLACEMENT (continued) LN[...]

  • Page 95

    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-31 LN-7 GMA WIRE FEEDER 9. Pry the retaining clip from the control relay . Remove the control relay from the control PC board. 10. Disengage the PC [...]

  • Page 96

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-32 MAIN POWER RESIST OR (R 1 ) REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this[...]

  • Page 97

    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-33 LN-7 GMA WIRE FEEDER REP AIR PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the[...]

  • Page 98

    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-34 LN-7 GMA WIRE FEEDER 7. Solder the two wires onto the new power resistor . 8. Install one insulating spacer onto the resistor mounting bolt. Inst[...]

  • Page 99

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-35 CONTROL RELA Y REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T ur[...]

  • Page 100

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-36 CONTROL RELA Y REPLACEMENT (continued) FIGURE F .1 1 – CONTROL RELA Y REPLACEMENT . CONTROL RELA Y RET AINING CLIP REP AIR[...]

  • Page 101

    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 LN-7 GMA WIRE FEEDER ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T urn off input power to the wi[...]

  • Page 102

    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 WIRE DRIVE ASSEMBL Y AND COMPONENTS REPLACEMENT (continued) TROUBLESHOOTING AND REP AIR F-38 LN-7 GMA WIRE FEEDER REP AIR PROCEDURE 1. Remove the cover from the control by removi[...]

  • Page 103

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-39 9. On two-roll feeders, remove the three hex head bolts, lockwashers, and flat washers from the bottom of the wire drive ass[...]

  • Page 104

    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 WIRE DRIVE ASSEMBL Y AND COMPONENTS REPLACEMENT (continued) TROUBLESHOOTING AND REP AIR F-40 LN-7 GMA WIRE FEEDER FIGURE F .13 – WIRE DRIVE ASSEMBL Y REMOV AL (FOUR-ROLL FEEDER[...]

  • Page 105

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-41 SWING ARM ASSEMBL Y REPLACEMENT FOR TWO-ROLL WIRE FEEDERS ELECTRIC SHOCK can kill. • Observe all safety precautions detail[...]

  • Page 106

    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 REP AIR PROCEDURE 1. Rotate the latch knob on the quick release assembly to the open position and swing the arm away from the gearbox. See Figure F .14. 2. Remove the hex head bo[...]

  • Page 107

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-43 6. Place the idle roll assembly into the groove pin. Secure in place with a speed clip. 7. Slide the pivot pin into the swin[...]

  • Page 108

    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-44 LN-7 GMA WIRE FEEDER SWING ARM ASSEMBL Y REPLACEMENT FOR FOUR-ROLL WIRE FEEDERS ELECTRIC SHOCK can kill. • Observe all safety precautions detai[...]

  • Page 109

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-45 REP AIR PROCEDURE 1. Remove the allen head setscrew from the center post of the wire drive assembly . See Figure F .15. 2. U[...]

  • Page 110

    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-46 LN-7 GMA WIRE FEEDER SWING ARM ASSEMBL Y REPLACEMENT FOR FOUR-ROLL WIRE FEEDERS (continued) 7. Place the two swing arms and spacers in the center[...]

  • Page 111

    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 GAS SOLENOID AND CONNECTIONS REPLACEMENT ELECTRIC SHOCK can kill. • Observe all safety precautions detailed throughout this manual. T urn off input power to the wire feeder . O[...]

  • Page 112

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-48 GAS SOLENOID AND CONNECTIONS REPLACEMENT (continued) FIGURE F .16 – GAS SOLENOID DISASSEMBL Y . GAS OUTLET FITTING RET AIN[...]

  • Page 113

    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 LN-7 GMA WIRE FEEDER TROUBLESHOOTING AND REP AIR F-49 REP AIR PROCEDURE 1. Remove the cover from the control box by removing the four 5/16 in. screws from the top and side of the[...]

  • Page 114

    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 AFTER REP AIR If a failed test indicates that any mechanical part which could affect the machine’ s electrical characteristics must be replaced, or if any electrical com[...]

  • Page 115

    Electrical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section G G1706 Control PC Board Components . . . . . . . . . . . . . . . . . . . . . . G-1 Wiring Diagrams Codes 9168 and 9386 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3 Codes 9643 and 9796 (4R) . . . . . . . . . . . .[...]

  • Page 116

    ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER G-1 PC BOARD LA YOUT 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 avail- able from Lincoln Electric. This information is provided for r[...]

  • Page 117

    ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER G-2 PC BOARD LA YOUT 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 avail- able from Lincoln Electric. This information is provided for r[...]

  • Page 118

    G-3 ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER Wiring Diagram — Codes 9168 and 9386 LN-7 GMA WIRING DIAGRAM 15021 4-4-86L 1 3 2 4 6 5 567 21 508 509 526 525 567 21 OPTIONAL ANALOG METER KIT PLUG OPTIONAL DIGITAL METER KIT PLUG P5 J5 D C F B A E . CR2 526 527 21 GLP REED SWITCH N.E. GND 2 4 INPUT CONTROL CABLE TO CONTACTOR CIRCUIT 115 V.A.C. WORK 4 [...]

  • Page 119

    G-4 ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER Wiring Diagram — Codes 9643 and 9796 LN-7 AND LN-7 GMA WIRING DIAGRAM 16056 1 3 2 4 6 5 567 21 508 509 526 525 567 21 OPTIONAL ANALOG METER KIT PLUG OPTIONAL DIGITAL METER KIT PLUG P5 J5 D C F B A E . CR2 526 527 21 GLP REED SWITCH N.E. GND 2 4 INPUT CONTROL CABLE TO CONTACTOR CIRCUIT 115 V.A.C. WORK 4[...]

  • Page 120

    G-5 ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER Wiring Diagram — Codes 9928 and 9931 1 3 2 4 6 5 567 21 508 509 526 525 567 21 OPTIONAL ANALOG METER KIT PLUG OPTIONAL DIGITAL METER KIT PLUG P5 J5 D C F B A E . CR2 526 527 21 GLP REED SWITCH N.E. GND 2 4 INPUT CONTROL CABLE TO CONTACTOR CIRCUIT 115 V.A.C. WORK 4 2 1 6 * 31 32A 531 4 2 3 P1 1 6 * 4 2 [...]

  • Page 121

    G-6 ELECTRICAL DIAGRAMS LN-7 GMA WIRE FEEDER Schematic Diagram — CONTROL P .C. BOARD LM224 X101 4 11 C120 (1) C103 600V .02 C102 1.00K R108 24Vdc CR101 J102 6 S2 S1 S1 D107 D119 15J 50V TP103 R101 25W GND. 21 32 J5 3 A 5 METER KIT RECEPTACLE 525 (NOT ON P.C. BOARD) (SPEED) R2,10K C ACCELERATION 544 542 543 (3) SPEED CONTROL CW HIGH ON DELAY RESET[...]