Lincoln Electric SVM154-A service manual Keypad Resistance Test

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F-23

TROUBLESHOOTING AND REPAIR

F-23

KEYPAD RESISTANCE TEST

WARNING

Service and repair should only be performed by Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in dan- ger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual.

If for any reason you do not understand the test procedures or are unable to per- form the test/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call 1-800-833- 9353(WELD).

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TEST DESCRIPTION

This test will determine if any key is not functioning properly.

MATERIALS NEEDED

5/16 in. Nut driver Analog Volt-Ohmmeter Small Screwdriver

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 DescriptionSafety Precautions Installation of the LN-10 Boom Mount Wire Feeder ComponentsMounting the 10 Series Wire Drive Recommended Processes and EquipmentMounting the LN-10 Control Box Mounting Synergic 7F Wire Drive Unit K679-1 orConnecting Wire Drive Unit to Control Box Wire Drive Speed Range Selection Control Speed Range SettingSeries Wire Drive Ratio Selection Electrode RoutingWire Feed Drive Roll Kits Procedure to Install Drive Roll and Wire GuidesSeries Wire Drive Roll Kit Installation KP1505 and KP1507 Synergic 7F Wire Drive 4-Roll Kits KP655 and KP656GUN and Cable Assemblies with Standard Connection GUN and Cable Assemblies with FAST-MATE ConnectionGmaw Guns Innershield Guns8INSTALLATIONA-8 Series Wire Drive Water Connections for Water Cooled GunsCylinder may explode if damaged Buildup of Shielding GAS may harm health or killElectrical Installation Input Cable LN-10 Control to Power SourceOptional Features Installation Boom and Bench ConversionsMaterials Required for bench to boom conversion Materials Required for boom to bench conversionTable of Contents Operation Section OperationLN-10 Control DIP Switch Setup Setting the DIP SwitchesWire Drive Head Selection Setup DIP Switch AccessWelding Power Source Selection Step Trigger Mode Operation Selection Security Mode SelectionMetric/English Wire Feed Speed Display Selection S2 switch 1 on = m/minMaximum Limits Setting Mode Selection S2 switch 4 on = Robotics mode onS2 switch 6 on Minimum Limits Setting mode on S2 switch 4 OFF = Robotics mode OFF As shippedPower-Down Save Procedure Lights Indicate whichKeypad and Display Operation 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 Making a Weld Procedure for Setting Angle of FeedplateGAS Guard Regulator Setting Wire Reel Changing Wire Feed Overload ProtectionGrounding Lead Protector DH-10Explanation of Prompting Error Messages Display Prompt or ErrorAccessories Table of Contents Accessories SectionTable C.1 LN-10 Wire Feeder Accessories GeneralWire Size Solid Steel Electrode Cored ElectrodeAluminum Electrode Aluminum Electrode For use with Binzel Guns OnlyK683-1 Dual Procedure Switch K683-3 Dual Procedure SwitchK1449-1 Dual Procedure Input Cable AssembliesK1558-1 Remote Switch Interface Module GUN Adapters for 10 SeriesGUN and Cable Assemblies K1561-1 Robotics Interface ModuleK1555-1 Insulated Lift Hook K1557-1 Swivel MountK1556-1 Light Duty Caster KIT Maintenance Table of Contents Maintenance SectionMaintenance Avoiding Wire Feeding Problems Safety PrecautionsRoutine Maintenance 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 Procedures Wire Drive Motor TestTest Description Materials NeededWire Drive Motor Test Test ProcedureTach Adjustment and Feedback Test Materials Needed 20TROUBLESHOOTING 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 Replacement32TROUBLESHOOTING and REPAIRF-32 Display PC Board Removal and ReplacementRemoval Procedure 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