Page 2 - SAFETY; WARNING; CALIFORNIA PROPOSITION 65 WARNINGS; The Above For Diesel Engines
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FOR ENGINEpowered equipment. 1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. O...
Page 3 - ii; ELECTRIC SHOCK can kill.
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY ii ii ARC RAYS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks andthe rays of the arc when welding or observingopen arc welding. Headshield and filter l...
Page 4 - iii
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY iii iii FOR ELECTRICALLYpowered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working onthe equipment. 8.b. Install equipment in accordance with the U.S. National ...
Page 5 - iv; PRÉCAUTIONS DE SÛRETÉ
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY iv iv PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructionset les précautions de sûreté specifiques qui parraissent dans cemanuel aussi bien que les précautions de sûr...
Page 6 - MASTER TABLE OF CONTENTS; Page; RETURN TO MAIN INDEX
MASTER TABLE OF CONTENTS v v Page Safety .................................................................................................................................................i-iv Installation ...................................................................................................
Page 8 - NOTES; vii
NOTES vii vii LN-9 GMA Wire Feeder Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC
Page 9 - TABLE OF CONTENTS; Installation
TABLE OF CONTENTS - INSTALLATION SECTION - Section A-1 Section A-1 Installation Technical Specifications ..............................................................................................................A-2 Installing the LN-9GMA 2-Roll and 4-Roll Models ....................................
Page 10 - INSTALLATION; TECHNICAL SPECIFICATIONS; Recommended; LENGTH; LN-9F GMA Control Box
INSTALLATION A-2 A-2 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TECHNICAL SPECIFICATIONS INPUT POWER Supplied by power source: 115 VAC, 50/60 ...
Page 11 - Accessories; MOUNTING THE WIRE FEED UNIT; Diagrams section of this manu-
INSTALLING THE LN-9 GMA2-ROLL AND 4-ROLL MODELS ATTACHING THE WIRE REEL STAND Both the 2-Roll and 4-Roll LN-9 GMA are shipped with-out the wire reel stand attached. The screws and wash-ers for mounting the wire reel stand are included withthe LN-9 GMA (fastened in their respective mountingholes). To...
Page 12 - ROUTING THE ELECTRODE; Accessories section for information about; POWER INPUT CABLE ASSEMBLY; Figure A.2. Remove the screws holding the; FIGURE A.1 – INPUT CONTROL CABLE AND
ROUTING THE ELECTRODE The electrode supply may be either from reels, Readi-Reels, spools, or bulk packaged drums or reels.Observe the following precautions: • The electrode must be routed to the wire feed unit so that the bends in the wire are at a minimum. Theforce required to pull the wire from th...
Page 13 - FIGURE A.2 – STRAIN RELIEF CLAMP; Bolt the electrode lead from the power source to the; BOTTOM VIEW
INSTALLATION A-5 A-5 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FIGURE A.2 – STRAIN RELIEF CLAMP CONNECTING THE POWER INPUT CABLEASSEMBLY TO T...
Page 15 - • Turn off input power to the welding; ELECTRIC SHOCK
INSTALLATION A-7 A-7 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FIGURE A.4 – CONNECTION OF LN-9 GMA TO DC-250, DC-400, and CV/CVI POWER SOURCE...
Page 18 - FIGURE A.7 – CONNECTION OF LN-9 GMA TO PULSE POWER 500 POWER SOURCES
INSTALLATION A-10 A-10 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FIGURE A.7 – CONNECTION OF LN-9 GMA TO PULSE POWER 500 POWER SOURCES TO LN-9...
Page 19 - FIGURE A.8 – CONNECTION OF LN-9 GMA TO V300 POWER SOURCES; TO WORK
INSTALLATION A-11 A-11 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FIGURE A.8 – CONNECTION OF LN-9 GMA TO V300 POWER SOURCES ELECTRODE CABLETO ...
Page 20 - MACHINE GROUNDING; TABLE A.1 – WORK CABLE SIZES; DIRECT WORK LEAD CONNECTION; Circuit
INSTALLATION A-12 A-12 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC MACHINE GROUNDING LN-9 GMA wire feeders are grounded to the powersource thro...
Page 21 - Accessories section; FOR GMA GUN CABLES:; FIGURE A.9 – GUN CABLE CONNECTIONS
INSTALLATION A-13 A-13 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC CONNECTING THE GUN CABLE TOTHE WIRE FEEDER A variety of gun and cable assemb...
Page 22 - FIGURE A.10 – SHIELDING GAS HOOKUP
HOOKING UP GMA SHIELDINGGAS CYLINDER may explode if damaged. • Gas under pressure is explosive. •· Always keep gas cylinders in an upright position and always keepthem chained to the undercarriageor a stationary support. See American National Standard Z-49.1, "Safety inWelding and Cutting," ...
Page 23 - Operation
TABLE OF CONTENTS - OPERATION SECTION - Section B-1 Section B-1 LN-9 GMA Wire Feeder Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Operation Operating Instructions .................................................................................................
Page 24 - OPERATION
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC B-2 B-2 LN-9 GMA Wire Feeder OPERATING INSTRUCTIONS Read and understand this entire section of operatinginstructions ope...
Page 25 - GENERAL DESCRIPTION
GENERAL DESCRIPTION The LN-9 GMA 2-Roll and 4-Roll semiautomatic wirefeeder models feature the precise "set and forget" dig-ital procedure control and the other welding and oper-ator features pioneered by the original LN-9 models.In addition, the LN-9 GMA models also have the fol-lowing adva...
Page 26 - The Idealarc
DC CONSTANT VOLTAGE POWERSOURCES The following welding system power sources are avail-able for use with all LN-9 GMA models: The Idealarc ® DC-250, DC-400, CV-400, CV-500 and, DC-600 are recommended for use with any LN-9 GMAmodel, as well as the Pulse Power 500, Invertec V300,and DC650 Pro, with the...
Page 27 - CONTROLS AND SETTINGS; a) When you are not welding, the trigger will function
OPERATION B-5 B-5 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC CONTROLS AND SETTINGS Operator controls for LN-9 GMA models are shown inFigure B....
Page 28 - FIGURE B.3 – WIRE FEEDER CONTROLS FOR LN-9 GMA
FIGURE B.3 – WIRE FEEDER CONTROLS FOR LN-9 GMA OPERATION B-6 B-6 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC
Page 29 - FIGURE B.4 – WIRE FEEDER CONTROLS FOR LN-9F GMA
OPERATION B-7 B-7 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC FIGURE B.4 – WIRE FEEDER CONTROLS FOR LN-9F GMA
Page 31 - AUTOMATIC SHUTDOWN
If such a grounding lead fault occurs, the meter will stillbe on and will be reading. The trigger circuit will notoperate, however. To release the circuit, press the"GLP Reset" button. See Figure B.3 or B.4 for the location of this button. The following precautions are recommended to avoidGL...
Page 32 - DRIVE ROLL INSTALLATION; NOTE: Although an LN-9 GMA model is shown in; Idle Roll
DRIVE ROLL INSTALLATION CHANGING DRIVE ROLLS FOR 2-ROLLWIRE FEEDERS To change drive rolls on a 2-roll wire feeder, refer toFigure B.5 and perform the following steps. NOTE: Although an LN-9 GMA model is shown in Figure B.5, the following procedure alsoapplies to LN-9F GMA models. 1. Rotate the latch...
Page 33 - GUIDE TUBE DETAIL; FIGURE B.5 – INSTALLING DRIVE ROLLS ON A 2-ROLL FEEDER
CLAMPING COLLAR DRIVE ROLL HALVES SPACER(IF REQ'D) KEY OUTPUTSHAFT GUIDE TUBE DETAIL OUTGOING GUIDE TUBE INSERT OUTGOING GUIDE TUBE LARGE RADIUS DRIVE ROLL INCOMING GUIDE TUBE SMALL RADIUS IDLE ROLL OPERATION B-11 B-11 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Sec...
Page 35 - GUIDE TUBE DETAIL; FIGURE B.6 – INSTALLING DRIVE ROLLS ON A 4-ROLL FEEDER
OPERATION B-13 B-13 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC CLAMPINGCOLLAR SPACER (IFREQUIRED) DRIVE ROLL HALVES KEY OUTPUTSHAFT OUTGOING G...
Page 36 - WIRE LOADING
OPERATION B-14 B-14 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC WIRE LOADING Loading a 22 to 30 Lb. (10 to 14 kg) Readi-ReelPackage Using the M...
Page 37 - FEEDING ELECTRODE AND BRAKE ADJUSTMENT
LOADING A 10 TO 30 LB. (4.5 TO 14 KG)SPOOL (12" DIAMETER) OR 13 - 14 LB.(6 KG) INNERSHIELD COIL: The Spindle should be located in the LOWER mounting hole. (For 8" (200 mm) spools, a K468 spindle adapter mustfirst be slipped onto spindle.) (For 13-14 lb. (6 Kg) Innershield coils, a K435 CoilA...
Page 38 - a) Be sure the coil is placed so that the spring loaded; CAUTION
LOADING 50 AND 60 LB. COILS ON 1”SPINDLE (K299 or K303 Wire Reel Stand) ADJUSTABLE WIRE REEL BRAKE The mount for standard 50 and 60 pound electrodecoils includes a two position brake assembly.Generally the brake should be a the inner position(nearest to the wire reel shaft) for wire feed speedsbelow...
Page 39 - Inch the electrode through the gun.
FEEDING ELECTRODE AND BRAKE ADJUSTMENT 1. Turn the reel until the free end of the electrode isaccessible. 2. While tightly holding the electrode, cut off the bentend. Straighten the first 6 inches. 3. Cut off the first inch. Insert the free end throughthe incoming guide tube. 4. Insert the free end ...
Page 40 - IDLE ROLL PRESSURE SETTING; PRESSURE
OPERATION B-18 B-18 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC IDLE ROLL PRESSURE SETTING The idle roll pressure is set at the factory backed ...
Page 42 - SELECT ACCELERATION
VOLTAGE CONTROL RESPONSE The LN-9 GMA is provided with selectable voltage con-trol response. Proper setting depends on the powersource and process being used. Refer to the appropri-ate power source connection diagram for the properconnection of the jumpers located on the LN-9 GMAVoltage Board. To ch...
Page 43 - MAKING A WELD; PROCEDURE AT END OF COIL; Lay the cable out straight.
MAKING A WELD 1. Inch the electrode through the gun and cable andthen cut the electrode within approximately 3/8" ofthe end of the contact tip for solid wire and withinapproximately 3/4" of the extension guide for coredwire. 2. Connect the work cable to the metal to be welded.The work cable ...
Page 46 - AUXILIARY EQUIPMENT CONTACTS; • K196 Input Cable Assemblies - For power sources; WIRE REEL STANDS AND MOUNTINGS; MOUNTING STAND; ACCESSORIES
AUXILIARY EQUIPMENT CONTACTS The power for 115 volt AC auxiliary equipment can beobtained from the terminals inside the LN-9 GMA con-trol box. The contacts are “hot” whenever the trigger ispressed or the unit is welding. The current draw of thiscircuit must not exceed 1/4 ampere. TURN THE INPUT POWE...
Page 49 - WIRE FEEDER ACCESSORIES; GUN AND CABLE ASSEMBLIES; TABLE C.1 – LN-9 GMA GUN AND CABLE ASSEMBLIES; Innershield
WIRE FEEDER ACCESSORIES BURNBACK TIMER KIT (K419) Provides a precise control of the electrode burnbackat the end of the weld. Prevents crater sticking andprovides proper stickout for starting the next weld.Recommended especially when welding with small(0.023-1/16") diameter wire at high wire fee...
Page 50 - Provides the following functions:
ACCESSORIES C-6 C-6 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC GMA TIMER KIT (K418) Provides the following functions: 1. Preflow Control - Pro...
Page 51 - K320 FLUX TANK LOADING
ACCESSORIES C-7 C-7 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SWIVEL PLATFORM (K178-1) For all LN-9 GMA wire reel stand combinations. Formoun...
Page 52 - K58 MAGNETIC SEPARATOR; The magnetic separator is used with all
K58 MAGNETIC SEPARATOR The K58 is a permanent magnet type separatordesigned to fit the top of the standard fill funnel of thecontinuous flux feed system. The purpose of the separator is to remove magneticmaterials such as mill scale and any other extraneousmagnetic materials which may have been reco...
Page 55 - Maintenance
TABLE OF CONTENTS - MAINTENANCE SECTION - Section D-1 Section D-1 LN-9 GMA Wire Feeder Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Maintenance Routine Maintenance ................................................................................................
Page 56 - SAFETY PRECAUTIONS; ROUTINE MAINTENANCE; DRIVE ROLLS AND GUIDE TUBES; Operation Section for drive roll installation; PERIODIC MAINTENANCE; CONTROL BOX; MAINTENANCE
SAFETY PRECAUTIONS ELECTRIC SHOCK can kill. • Only qualified personnel should perform this maintenance. • Turn the input supply power OFF at the disconnect switch orfuse box before working on thisequipment. • Do not touch electrically hot parts. ROUTINE MAINTENANCE DRIVE ROLLS AND GUIDE TUBES After ...
Page 57 - GUN AND CABLE MAINTENANCE; FIGURE D.1 – SPEED SENSOR MODULE LOCATION
GUN AND CABLE MAINTENANCE For instructions on periodic maintenance for the weld-ing gun and cables, refer to the manual for your specif-ic model of welding gun. PROPER SPEED SENSOR MODULEMOUNTING The LN-9 GMA Speed Sensor Module is a three leadHall-Effect switch device encased in an externallythread...
Page 58 - /2 Amp AC 24 Volts — Inductive; FIGURE D.2 – SWITCH REQUIREMENTS
The following Figures D.2 and D.3 should serve as aguide to determine if a particular gun or switch can beconnected to the LN-9 GMA and LN-9F GMA. “A” Diameter Hole to be Concentric to Wire Size .749/.747 (19.0/18.9) in. (mm) Diameter Within .008 (.20) F.I.M. 0.68-5/64 (1.7-2.0) .125 [1/8” (3.2 mm) ...
Page 59 - FIGURE E.1 – LN-9 GMA BLOCK LOGIC DIAGRAM
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Section E-1 Section E-1 LN-9 GMA Wire Feeder Theory of Operation ............................................................................................................. Section E General Description ..........
Page 60 - POWER INPUT CIRCUITS; THEORY OF OPERATION; FIGURE E.2 – POWER INPUT CIRCUITS
POWER INPUT CIRCUITS The 115VAC is applied (usually from the welding powersource) via the input connector and through the circuitbreaker and R1 resistor to the power board, the T2 trig-ger transformer, and the T1 transformer. The 24VAC developed at the T2 trigger transformer isapplied to the trigger...
Page 61 - FIGURE E.3 – TRIGGER AND SHUTDOWN CIRCUIT
TRIGGER AND SHUTDOWN CIRCUIT When the gun trigger switch is activated (closed), thetrigger board completes the trigger signal path. Thisenergizes the CR1 relay located on the power board.The CR1 relay activates the wire drive motor and the#2 and #4 circuit, which then activates the Lincolnwelding po...
Page 62 - FIGURE E.4 – ARC VOLTAGE, WIRE SPEED CONTROL AND METERING
ARC VOLTAGE, WIRE SPEED CONTROL AND METERING The arc voltage, which is sensed at the work piece andmotor gear box, is connected through a polarity switchto the voltage board. This actual arc voltage is com-pared to the reference preset voltage that is set by thevoltage control. The voltage board det...
Page 65 - NOTE
Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Section F-1 Section F-1 LN-9 GMA Wire Feeder Troubleshooting & Repair Section ................................................................................Section F How to Use Troubleshooting Guide ..........
Page 66 - HOW TO USE TROUBLESHOOTING GUIDE; TROUBLESHOOTING & REPAIR; The
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC HOW TO USE TROUBLESHOOTING GUIDE Service and repair should be performed by only Lincoln Electric Factory Trained Personn...
Page 67 - PC BOARD TROUBLESHOOTING PROCEDURES
ELECTRIC SHOCK can kill. Have an electrician install and servicethis equipment. Turn the machine OFFbefore working on equipment. Do nottouch electrically hot parts. Sometimes machine failures appear to be due to PCboard failures. These problems can sometimes betraced to poor electrical connections. ...
Page 68 - Observe Safety Guidelines; TROUBLESHOOTING GUIDE; detailed in the beginning of this manual.; FUNCTION PROBLEMS; Make sure 115VAC is being
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-4 F-4 LN-9 GMA Wire Feeder Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in th...
Page 69 - The Ground Lead Protector; Trigger
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-5 F-5 LN-9 GMA Wire Feeder TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in th...
Page 70 - Make sure the gun trigger is not
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-6 F-6 LN-9 GMA Wire Feeder Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in th...
Page 71 - Make sure the interlock switch
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-7 F-7 LN-9 GMA Wire Feeder TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in th...
Page 72 - Contact your local Lincoln
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-8 F-8 LN-9 GMA Wire Feeder Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in th...
Page 73 - The control PC board may be
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-9 F-9 LN-9 GMA Wire Feeder TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in th...
Page 74 - TRIGGER INTERLOCK FUNCTION PROBLEMS
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-10 F-10 LN-9 GMA Wire Feeder Observe Safety Guidelines TROUBLESHOOTING GUIDE detailed in ...
Page 75 - The voltage PC board may be; T1 Transformer; The power PC board may be
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-11 F-11 LN-9 GMA Wire Feeder TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 76 - Check or replace gun trigger; Wire Drive Motor; T2 Transformer; The power PC board may be
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC F-12 F-12 LN-9 GMA Wire Feeder TROUBLESHOOTING & REPAIR TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 78 - Make sure the power source; Out of Voltage; The voltage PC board may be
TROUBLESHOOTING & REPAIR F-14 F-14 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 79 - FEEDING PROBLEMS; Make certain the drive rolls and
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-15 F-15 LN-9 GMA Wire Feeder TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 80 - WELDING PROBLEMS; Check the welding cables for
TROUBLESHOOTING & REPAIR F-16 F-16 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 82 - METER FUNCTION PROBLEMS; The arc is unstable or oscillating.
TROUBLESHOOTING & REPAIR F-18 F-18 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 84 - Meter Circuit
TROUBLESHOOTING & REPAIR F-20 F-20 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 85 - STARTING PROBLEMS
TROUBLESHOOTING & REPAIR F-21 F-21 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 86 - Put the Lincoln power source in
TROUBLESHOOTING & REPAIR F-22 F-22 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 87 - Put the Lincoln power source in
TROUBLESHOOTING & REPAIR F-23 F-23 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING GUIDE Observe Safety Guidelines detailed in ...
Page 88 - T1 TRANSFORMER TEST; DESCRIPTION; This procedure takes approximately 20 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-24 F-24 LN-9 GMA Wire Feeder T1 TRANSFORMER TEST WARNING Service and repair should be per...
Page 89 - TEST PROCEDURE; Remove input power to the LN-9 GMA wire; Electric Shock can kill.; • With power applied,
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-25 F-25 LN-9 GMA Wire Feeder T1 TRANSFORMER TEST (continued) TEST PROCEDURE 1. Remove inp...
Page 90 - With 115VAC applied to the primary leads
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-26 F-26 LN-9 GMA Wire Feeder 6. Using the volt/ohmmeter, check for 10VAC at secondary lea...
Page 92 - T2 TRANSFORMER TEST; FIGURE F.3 – “PROTECTION CIRCUIT TROUBLESHOOTING” NAMEPLATE; PROTECTION CIRCUIT
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-28 F-28 LN-9 GMA Wire Feeder T2 TRANSFORMER TEST (continued) FIGURE F.3 – “PROTECTION CIR...
Page 93 - Locate the T2 transformer primary lead; R1 RESISTOR
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-29 F-29 LN-9 GMA Wire Feeder T2 TRANSFORMER TEST (continued) 4. Locate the T2 transformer...
Page 94 - FIGURE F.5 – T2 SECONDARY LEADS #621 AND #620 ON TRIGGER PC BOARD; LEAD
TROUBLESHOOTING & REPAIR F-30 F-30 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC T2 TRANSFORMER TEST (continued) Electric Shock can kill. • W...
Page 95 - This procedure takes approximately 12 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-31 F-31 LN-9 GMA Wire Feeder WARNING WIRE DRIVE MOTOR TEST Service and repair should be p...
Page 96 - WIRE DRIVE MOTOR TEST; FIGURE F.6 – LEAD #539 AND #541 AT POWER PC BOARD TERMINAL STRIP
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-32 F-32 LN-9 GMA Wire Feeder WIRE DRIVE MOTOR TEST (continued) FIGURE F.6 – LEAD #539 AND...
Page 97 - Hall Effect Module Test.
ELECTRIC SHOCK can kill. • With power applied, there are high voltagesinside the wire feeder.Do not reach into thewire feeder or touch anyinternal part of the wirefeeder while power isapplied. 6. Apply 115 VAC power. 7. With the gun trigger activated or the gun ter- minals jumpered together (see the...
Page 98 - HALL EFFECT MODULE TEST AND ALIGNMENT; The Hall Effect Module Test takes approximately
HALL EFFECT MODULE TEST AND ALIGNMENT 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 ormachine operator and will invalidate your factory warranty. For your safety and to...
Page 99 - Remove the input power to the LN-9 GMA
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-35 F-35 LN-9 GMA Wire Feeder HALL EFFECT MODULE FEEDBACK TEST PROCEDURE 1. Remove the inp...
Page 100 - General Power Supply; With the gun trigger activated or the gun ter-
ELECTRIC SHOCK can kill. • With power applied, there are high voltagesinside the wire feeder.Do not reach into thewire feeder or touch anyinternal part of the wirefeeder while power isapplied. 6. Apply input power to the LN-9 GMA and test for 15VDC at leads #525(+) to #510(-). Thisis the supply volt...
Page 101 - FIGURE F.8 – HALL EFFECT MODULE LOCATION
HALL EFFECT MODULE ALIGNMENT TEST PROCEDURE The LN-9 GMA wire speed sensor is a threelead hall-effect device encased in an externallythreaded housing. It is screwed into a mountingplate on the motor side of the wire drive gear-box. See Figure F.8. 1. Remove the input power to the LN-9 GMA. 2. Check ...
Page 102 - This procedure takes approximately 8 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-38 F-38 LN-9 GMA Wire Feeder WARNING VOLTMETER ACCURACY TEST Service and repair should be...
Page 103 - VOLTMETER ACCURACY TEST; FIGURE F.9 – VOLTMETER CONNECTION POINT; Installation section of this; Connect the test meter (see Materials; BRASS
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-39 F-39 LN-9 GMA Wire Feeder VOLTMETER ACCURACY TEST (continued) FIGURE F.9 – VOLTMETER C...
Page 104 - • With power applied, there; Meter Circuit Accuracy Test.; If no further tests are required, remove the
ELECTRIC SHOCK can kill. • With power applied, there are high voltages insidethe wire feeder. Do notreach into the wire feederor touch any internal partof the wire feeder whilepower is applied. 3. With the LN-9 GMA gun trigger closed or the gun terminals jumpered together (see theWiring Diagram), th...
Page 105 - This procedure takes approximately 17 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-41 F-41 LN-9 GMA Wire Feeder WARNING METER CIRCUIT ACCURACY TEST Service and repair shoul...
Page 106 - METER CIRCUIT ACCURACY TEST; FIGURE F.10 – METER PC BOARD LOCATIONS AND COVER
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-42 F-42 LN-9 GMA Wire Feeder METER CIRCUIT ACCURACY TEST (continued) FIGURE F.10 – METER ...
Page 107 - Test for AC supply to the meter PC board.; FIGURE F.11 – METER PC BOARD TEST POINTS
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-43 F-43 LN-9 GMA Wire Feeder METER CIRCUIT ACCURACY TEST (continued) 5. Test for AC suppl...
Page 108 - With the meter in SET volts, adjust the voltage
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-44 F-44 LN-9 GMA Wire Feeder METER CIRCUIT ACCURACY TEST (continued) Test Digital Meter A...
Page 109 - Connect the + probe to lead called for in the table; METRIC MODEL; LO
Test Meter PC Board Wire Feed Speed Accuracy.(Metric Models Only) 1. Use a test meter with at least 3-1/2 digits and ± 0.5% accuracy. 2. Connect the + probe to lead called for in the table below and the - probe to lead #510C. NOTE: The coating will have to be removed from thetest points. 3. With the...
Page 111 - WIRE SPEED ACCURACY TEST; Set the LN-9 GMA wire speed control for
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-47 F-47 LN-9 GMA Wire Feeder WIRE SPEED ACCURACY TEST (continued) TEST PROCEDURE Perform ...
Page 112 - This procedure takes approximately 18 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-48 F-48 LN-9 GMA Wire Feeder WARNING OUT OF VOLTAGE RANGE SHUT DOWN TEST Service and repa...
Page 113 - OUT OF VOLTAGE RANGE SHUT DOWN TEST; FIGURE F.12 – VOLTAGE PC BOARD WITH JUMPERS
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-49 F-49 LN-9 GMA Wire Feeder OUT OF VOLTAGE RANGE SHUT DOWN TEST (continued) FIGURE F.12 ...
Page 114 - If the ACTUAL voltage reading is zero, the
TROUBLESHOOTING & REPAIR F-50 F-50 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC OUT OF VOLTAGE RANGE SHUT DOWN TEST (continued) 8. If the AC...
Page 116 - GENERAL POWER SUPPLY TESTS
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-52 F-52 LN-9 GMA Wire Feeder GENERAL POWER SUPPLY TESTS (continued) TEST PROCEDURE 1. Rem...
Page 117 - GENERAL POWER SUPPLY CHECKS
TROUBLESHOOTING & REPAIR F-53 F-53 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC GENERAL POWER SUPPLY CHECKS CHECKPOINT TEST CONNECTOR LEAD N...
Page 119 - FIGURE F.13 – METER PANEL ASSEMBLY SCREWS; DIGITAL METER AND METER PC BOARD REMOVAL AND; Locate and remove the two screws on the top
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-55 F-55 LN-9 GMA Wire Feeder FIGURE F.13 – METER PANEL ASSEMBLY SCREWS MOUNTING SCREWS ME...
Page 120 - FIGURE F.15 – METER PC BOARD REMOVAL; MOUNTING NUTS; REPLACEMENT PROCEDURE
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-56 F-56 LN-9 GMA Wire Feeder FIGURE F.15 – METER PC BOARD REMOVAL 4 MOUNTING NUTS DIGITAL...
Page 122 - PROCEDURE; REED SWITCH (CR2) REMOVAL AND REPLACEMENT; FIGURE F.16 – CR2 REED SWITCH LOCATION AND COMPONENTS; COPPER
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-58 F-58 LN-9 GMA Wire Feeder PROCEDURE 1. Remove input power to the LN-9 GMA wire feeder....
Page 123 - This procedure takes approximately 25 minutes to perform.
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-59 F-59 LN-9 GMA Wire Feeder WARNING T1 TRANSFORMER REMOVAL AND REPLACEMENT Service and r...
Page 124 - Using the phillips head screwdriver remove the; T1 TRANSFORMER REMOVAL AND REPLACEMENT; FIGURE F.17 – PRIMARY LEAD #31 AT R1 RESISTOR
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-60 F-60 LN-9 GMA Wire Feeder PROCEDURE 1. Remove input power to the LN-9 GMA. 2. Using th...
Page 126 - Remove the two phillips head screws from the; FIGURE F.20 – 1CR RELAY REMOVAL; NUT AND SCREW
Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR F-62 F-62 LN-9 GMA Wire Feeder 8. Remove the two phillips head screws from the control PC b...
Page 127 - REPLACEMENT; Figure
TROUBLESHOOTING & REPAIR F-63 F-63 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC T1 TRANSFORMER REMOVAL AND REPLACEMENT (continued) 11. Using...
Page 128 - DRIVE MOTOR REMOVAL AND REPLACEMENT; This procedure takes approximately 40 minutes to perform.
F-64 F-64 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR DRIVE MOTOR REMOVAL AND REPLACEMENT WARNING Service and repa...
Page 129 - FIGURE F.22 – TOP MOTOR PLATE SCREWS
F-65 F-65 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR DRIVE MOTOR REMOVAL AND REPLACEMENT (continued) PROCEDURE 1....
Page 130 - Remove the three screws and lock washers; FIGURE F.23 – GLASTIC MOUNTING SCREWS
F-66 F-66 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR DRIVE MOTOR REMOVAL AND REPLACEMENT (continued) 11. Remove t...
Page 131 - Lift the right side cover assembly and care-; FIGURE F.24 – MOTOR AND WIRE DRIVE REMOVAL
TROUBLESHOOTING & REPAIR F-67 F-67 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC 12. Lift the right side cover assembly and care- fully lift ...
Page 132 - REASSEMBLY; Hall
F-68 F-68 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC TROUBLESHOOTING & REPAIR DRIVE MOTOR REMOVAL AND REPLACEMENT (continued) 15. With the...
Page 133 - RETEST AFTER REPAIR; OR; Voltmeter Accuracy Check
TROUBLESHOOTING & REPAIR F-69 F-69 LN-9 GMA Wire Feeder Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Section TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC RETEST AFTER REPAIR Retest the LN-9 GMA wire feeder: If it f...
Page 137 - ELECTRICAL DIAGRAMS
G-3 ELECTRICAL DIAGRAMS LN-9 GMA Wiring Diagram-LN-9 GMA CLEVELAND, OHIO U.S.A. 1 - 1 0 - 9 7 G L 1 0 2 4 7 601 602 510C 518 510 517 519 560 561 562 1 4 3 6 2 5 11 7 8 9 10 12 ( J 8 ) ( P 8 ) 601 602 510A 510B 518 518 510 517 519 560 561 562 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 5 1 8 5 6 2 5 1 8 5 1 0 C 2 ...
Page 139 - Voltage Board Schematic
G-5 ELECTRICAL DIAGRAMS LN-9 GMA Voltage Board Schematic 5 . 6 2 K R42 5 2 5 5 0 0 5 2 4 5 1 0 5 1 0 5 1 4 5 2 5 5 1 0 5 6 . 2 K R21 D 1 0 1 5 . 0 K R20 5 2 1 A 1 0 0 K R19 5 3 0 D 1 1 5 3 0 5 0 0 3 3 2 K R22 2 2 . 1 K R23 ( + 1 5 V ) 5 2 2 5 2 4 5 1 0 T O R 1 0 7 S H U T D O W N X 2 7 6 5 D 9 J 2 1...
Page 140 - Power PC Board Schematic
G-6 ELECTRICAL DIAGRAMS LN-9 GMA Power PC Board Schematic 3 2 A 4 5 0 4 7 R1 5 3 2 M 5 4 1 R E V D I R E C T I O N S 7 S W I T C H D 3 5 3 1 7 A 5 5 4 1 B 5 3 1 5 3 9 B 3 2 A 3 2 A D 2 H O T H O T - C O L D 2 A 5 2 4 A 5 0 0 6 2 0 5 3 0 6 2 0 6 2 1 H O T I N T E R L O C K S 2 A 9 11 3 1 3 J 1 1 X 2 ...
Page 141 - Trigger PC Board Schematic
G-7 ELECTRICAL DIAGRAMS LN-9 GMA Trigger PC Board Schematic G E N E R A L I N F O R M A T I O N 1 W 7 5 V D Z 2 2.21K R12 4.75K R14 5 5 3 0 D Z - 2 R - 1 5 1 7 9 5 0 M L A S T N O . U S E D O N H O L E S S I Z E S P E R E - 2 0 5 6 C h Õ g e . S h t . N o . T H E L I N C O L N E L E C T R I C C O . ...
Page 142 - PM Control Schematic
G-8 ELECTRICAL DIAGRAMS LN-9 GMA PM Control Schematic 5 2 5 1 5 . 0 K R 2 1 2 6 7 R 4 4 5 2 0 5 2 5 5 2 5 5 2 5 J - 1 0 V - 1 0 V + 1 0 V + 1 5 V + 1 5 V + 1 5 V + 1 5 V + 1 5 V - 1 0 V + 1 0 V THE LINCOLN ELECTRIC CO. DATE DR. CLEVELAND, OHIO U.S.A. 1A, 400V DIODES = LM CHK. NONE X 3 7 6 5 5 0 V 4 ...
Page 143 - Meter Board Schematic; M E T E R B O A R D S C H E M A T I C
G-9 ELECTRICAL DIAGRAMS LN-9 GMA Meter Board Schematic 1 5 1 0 5 6 1 2 8 4 5 1 0 C B 8 5 1 0 B C 7 5 1 8 5 1 7 5 6 2 T P 5 3 A C E 5 1 9 5 6 0 W I T H O U T A F F E C T I N G C I R C U I T B O A R D T H I S D I A G R A M M A Y N O T S H O W T H E E X A C T C O M P O N E N T S R E S I S T O R S = O h...
Page 144 - Operating Schematic
G-10 ELECTRICAL DIAGRAMS LN-9 GMA Operating Schematic 17 63 12-21-89C 11-9-90D 11-1-91A 1-21-94H 3-25-94A 6-7-96A 8-2-96B L N - 9 G M A A N D L N - 9 F G M A O P E R A T I N G S C H E M A T I C D A D N O N E 1 7 6 3 6 - 2 6 - 8 6 6 - 2 5 - 9 2 t UNLESS OTHERWISE SPECIFIED TOLERANCE ON HOLE SIZES PER...
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