Lincoln Electric SVM154-A service manual Control Ohms 50 Ohms Typical

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F-25	TROUBLESHOOTING AND REPAIR	F-25
	KEYPAD RESISTANCE TEST (continued)
	NOTE: There should not be continuity
	between pins until a key is pressed on the
	keypad.

TABLE F.1 — KEYPAD RESISTANCE TEST.

				MAXIMUM
TEST POINTS				ALLOWABLE RESISTANCE
FROM PIN	TO PIN		KEY PRESSED	(TYPICAL RESISTANCE)
1J10	2J10		CONTROL	100 OHMS (50 OHMS TYPICAL)
1J10	3J10		TIMER	100 OHMS (50 OHMS TYPICAL)
1J10	4J10		TRIGGER	100 OHMS (50 OHMS TYPICAL)
1J10	6J10		PROCEDURE	100 OHMS (50 OHMS TYPICAL)
1J10	7J10		COLD FEED FORWARD	100 OHMS (50 OHMS TYPICAL)
1J10	8J10		COLD FEED REVERSE	100 OHMS (50 OHMS TYPICAL)
1J10	9J10		GAS PURGE	100 OHMS (50 OHMS TYPICAL)

LN-10

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Contents SVM154-A ISAFETYi Safety Fumes and GasesWelding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Installation Table of Contents Installation SectionTechnical Specifications LN-10 Head & Control General DescriptionMounting the 10 Series Wire Drive Safety PrecautionsInstallation of the LN-10 Boom Mount Wire Feeder Components Recommended Processes and EquipmentConnecting Wire Drive Unit to Control Box Mounting Synergic 7F Wire Drive Unit K679-1 orMounting the LN-10 Control Box Series Wire Drive Ratio Selection Wire Drive Speed Range SelectionControl Speed Range Setting Electrode RoutingSeries Wire Drive Roll Kit Installation KP1505 and KP1507 Wire Feed Drive Roll KitsProcedure to Install Drive Roll and Wire Guides Synergic 7F Wire Drive 4-Roll Kits KP655 and KP656Gmaw Guns GUN and Cable Assemblies with Standard ConnectionGUN and Cable Assemblies with FAST-MATE Connection Innershield GunsCylinder may explode if damaged 8INSTALLATIONA-8Series Wire Drive Water Connections for Water Cooled Guns Buildup of Shielding GAS may harm health or killElectrical Installation Input Cable LN-10 Control to Power SourceMaterials Required for bench to boom conversion Optional Features InstallationBoom and Bench Conversions Materials Required for boom to bench conversionTable of Contents Operation Section OperationWire Drive Head Selection LN-10 Control DIP Switch SetupSetting the DIP Switches Setup DIP Switch AccessWelding Power Source Selection Metric/English Wire Feed Speed Display Selection Step Trigger Mode Operation SelectionSecurity Mode Selection S2 switch 1 on = m/minS2 switch 6 on Minimum Limits Setting mode on Maximum Limits Setting Mode SelectionS2 switch 4 on = Robotics mode on S2 switch 4 OFF = Robotics mode OFF As shippedKeypad and Display Operation Power-Down SaveProcedure Lights Indicate which Keypad and Display DescriptionTrigger Mode Selection Display Control Keys Control Control Select key enables operator to Digital Memory VoltmeterMaximum and Minimum Limits Setting Modes Dual Procedure Remote Wire Reel Loading READI-REELS Spools or CoilsFigure B.2 GAS Guard Regulator Setting Procedure for Setting Angle of FeedplateMaking a Weld Grounding Lead Protector Wire Reel ChangingWire Feed Overload Protection DH-10Explanation of Prompting Error Messages Display Prompt or ErrorAccessories Table of Contents Accessories SectionTable C.1 LN-10 Wire Feeder Accessories GeneralAluminum Electrode Wire Size Solid Steel ElectrodeCored Electrode Aluminum Electrode For use with Binzel Guns OnlyK1449-1 Dual Procedure K683-1 Dual Procedure SwitchK683-3 Dual Procedure Switch Input Cable AssembliesGUN and Cable Assemblies K1558-1 Remote Switch Interface ModuleGUN Adapters for 10 Series K1561-1 Robotics Interface ModuleK1556-1 Light Duty Caster KIT K1557-1 Swivel MountK1555-1 Insulated Lift Hook Maintenance Table of Contents Maintenance SectionRoutine Maintenance MaintenanceAvoiding Wire Feeding Problems Safety Precautions Periodic MaintenanceFigure D.1 Major Component Locations Table of Contents Theory of Operation Section Theory of OperationControl Board Input RECEPTACLE, Control Board and Operator Controls Wire Feed Head Receptacle Figure E.3 LN-10 Wire Feed Head and ReceptacleWire Feed Overload Loss of Voltage Sense Protection Shutdown Theory of Operation Protection and ShutdownLN-10 Troubleshooting and Repair Table of Contents Troubleshooting and Repair SectionHOW to USE Troubleshooting Guide Return to Return to Master TOCPC Board Troubleshooting Procedures LN-10 Troubleshooting Guide Function ProblemsFunction Problems Power Source Selection Function Problems Mode Selection Perform the Encoder Board Test Troubleshooting and Repair Mum and minimum limit set Perform the Gas Solenoid Test Feeding Problems Welding Problems LN-10 Test Description Test ProceduresWire Drive Motor Test Materials NeededWire Drive Motor Test Test ProcedureTach Adjustment and Feedback Test Materials Needed20TROUBLESHOOTING and REPAIRF-20 Tach Adjustment and Feedback TestTach Adjustment Procedure LN-10 Keypad Resistance Test 24TROUBLESHOOTING and REPAIRF-24 Keypad Resistance TestControl Ohms 50 Ohms Typical LN-10 Encoder PC Board Test Encoder PC Board Test Figure F.4 Encoder PC Board TestGAS Solenoid Test 30TROUBLESHOOTING and REPAIRF-30 GAS Solenoid TestComponent Replacement Procedures Display PC Board Removal and ReplacementRemoval Procedure 32TROUBLESHOOTING and REPAIRF-32Display PC Board Removal and Replacement Replacement ProcedureGAS Solenoid Removal and Replacement 34TROUBLESHOOTING and REPAIRF-34 GAS Solenoid Removal and ReplacementEncoder PC Board Removal and Replacement Encoder PC Board Removal and Replacement Figure F.8 Encoder PC Board Removal and ReplacementWire Drive Motor and Gear BOX Removal and Replacement Wire Drive Motor and Gear BOX Removal and Replacement Figure F.9 Wire Feed Assembly RemovalTo Remove the Wire Drive Assembly from the Gear BOX To Remove the Drive Motor from the Gear BOXReplacement Procedures Current Sensing Reed Switch Removal and Replacement Current Sensing Reed Switch Plug Check Wire Feed Speed Range Retest After RepairElectrical Diagrams Section Electrical Diagrams Wiring Diagram LN-10 ControlWiring Diagram LN-10 Wire Drive Electrode Cable From Current SensorSchematic Control PC Board #1 Schematic Control PC Board #2 Circuitry TachPC Board ASSEMBLY-CONTROL 3168 GSchematic Display PC Board 5VABoard Schematic Encoder PC Board 22066PC Board ASSEMBLY-ENCODER EncoderSVM Error Reporting Form