Lincoln Electric IM557 manual Procedure for Replacing PC Boards Electric Shock can kill

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E-12	TROUBLESHOOTING	E-12

Procedure for Replacing PC Boards

WARNING

ELECTRIC SHOCK can kill.

•Have a qualified individual install and service this equipment.

•Turn the power source input power off at the disconnect switch before work- ing on this equipment.

•Do not touch electrically hot parts.

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Before replacing a PC board which is suspected of being defective, visually inspect the PC board in ques- tion for any electrical or mechanical damage to any of its components and conductors on the back of the board.

a. If there is no visible damage to the PC board, install a new one and see if this remedies the prob- lem. If the problem is remedied, reinstall the old PC board to see if the problem still exists. If it does no longer exist with old PC board:

1.Check the PC board harness connector pins for corrosion, contamination, or looseness.

2.Check leads in the plug harness for loose or intermittent connection.

b.If PC board is visibly damaged electrically, before possibly subjecting the new PC board to the same cause of failure, check for possible shorts, opens, or grounds caused by:

1.Frayed or pinched lead insulation.

2.Poor lead termination, such as a poor contact or a short to adjacent connection or surface.

3.Shorted or open motor leads, or other external leads.

4.Foreign matter or interference behind the PC boards.

c.If PC board is visibly damaged mechanically, inspect for cause, then remedy before installing a replacement PC board.

If there is damage to the PC board or if replacing PC board corrects problem, return it to the local Lincoln Electric Field Service Shop.

SYNERGIC 7 & 7H

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Contents Synergic 7 and 7H Safety Mar ‘95Electric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Mar. ‘93Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationTable of Contents Type K631-3 K631-4 Wire Speed Range InstallationTechnical Specifications Synergic 7 and 7H Size & Weight Without Wire Stand With K377 Wire StandGeneral Description Standard FeaturesWire Drive Features Recommended Processes and EquipmentControl Features Y P a D a N D D I S P L a Y Description RUN-IN WFSSafety Precautions Electric Shock can killSteel Wire Sizes Roll Procedure to Install Drive Roll and Guide TubesWire Feed Drive Roll and Guide Tube Kits Aluminum Wire SizesFor GMA Gun Cables Gun Cable Connection Wire Feeder to GunGun and Cable Assemblies Gmaw GunsGmaw Shielding Gas Shut off shielding gas supply when not in useSynergic 7 Water Connections for Water- Cooled Guns Cylinder may explode if damagedElectrical Installation Warning Current Optional Features InstallationWork Cable 60% Duty Cycle Up to 100 ft Length 30mInstallation Operation Mode SelectionPower-Down Save Operating InstructionsPreset voltage/trim may be adjusted Display Control KeysCold Feed Procedure Selector Switch Step Trigger Mode SelectionDual Procedure Remote Control K1449-1 Memory Ammeter SelectionWire Loading Figure B.1a Threaded Locking CollarInnershield Coils Cut the tie wires at this time To remove the wire reel from its shaft, graspKnob so it seats into the shaft when released Coil tie wiresFeeding Electrode READI-REELS a K438 READI-REEL Adapter Must be UsedIdle Roll Pressure Setting Gas Guard Regulator SettingWire Feed Overload Protection Wire Reel ChangingMaking a Weld Explanation of Prompting Error Messages Grounding Lead ProtectorAccessories Optional FeaturesUniversal Wire Reel Stand K1524-1 60 LB .2 KG Coil Adapter K1504-1READI-REEL Adapters MISC. Options K179 type vacuum unit not recommended for use with SynergicAvoiding Wire Feeding Problems MaintenanceMaintenance Routine Maintenance1TROUBLESHOOTINGE-1 Locate Problem SymptomTroubleshooting Ing WeldingIng and gas flow rate is proper ReplaceDefective wire feed motor tach or No control of wire feedTers on wire feeder display do not Connector J1 on control PCSpeed does not change when Run-in and weld speeds are set Wire feed motor runs and solenoid Power source is defectiveWiring harness or Control PC Or there may be a problem withProblem with wire feeder harness Meters on wire feeder display doNot match those on power Remote control kit must be usedTroubleshooting Display. If not, refer to Problem Dure switch Be connectedBetween procedures a and B Wiring harness, or Control boardSwitch between procedures a Local dual procedure switchDual procedure switch is used to Faulty communication betweenTroubleshooting HXX Procedure for Replacing PC Boards Electric Shock can kill Diagrams Wiring Diagram SynergicInput Connection Diagram Electric Shock Can KillDimension Print W I R E R E E L S T a N DSynergic 7 & 7H Synergic 7 & 7H Synergic 7 & 7H Synergic 7 & 7H Precaucion Warnung