Lincoln Electric SVM167-A service manual Test for Feedback Voltage to Control Board, 1109 a, Vdc

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F-17

TROUBLESHOOTING AND REPAIR

F-17

WIRE DRIVE MOTOR AND WIRE SPEED POTENTIOMETER TEST

(continued)

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TEST FOR FEEDBACK VOLTAGE TO CONTROL BOARD

1.Disconnect the main AC input power to the machine.

2.Locate plug J1 and the potentiometer leads. See Figure F.5. #1113A and 1109A.

3.Connect main input power to the machine.

b. Carefully insert the meter probes into the lead side of plug J1. See Figure F5.

c. Turn the machine ON and pull the gun trigger to conduct the voltage test.

FROM LEAD	TO LEAD	EXPECTED
		VOLTAGE
1109 A	1113 A	0 - 5 VDC

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WARNING

ELECTRIC SHOCK can kill.

•Do not touch electrically live parts such as output terminals or internal wiring.

•All input power must be electri- cally disconnected before pro- ceeding.

5.If the 0 to 5 VDC is present, the potentiometer circuit is sending the correct feedback signal to the control PC board. Check the leads and plug J1. See the Wiring Diagram.

6.If the 0 to 5 VDC is NOT present or NOT correct, the control PC board is not receiving the proper feedback voltage from the potentiometer circuit.

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4. Make the	following voltage tests:	7.	If the leads are okay, the potentiometer
			circuit may	be	faulty, replace the
a. Turn the machine OFF between			potentiometer	circuit.
each	test.
		8.	Replace the	tool	tray.

	FIGURE F.5. – PLUG J1
	1103A
1	8
9	16
1109A	1113A
	POWER MIG® 215

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Contents Safety Depends on You Power MIGCalifornia Proposition 65 Warnings SafetyCan be dangerous Electric Shock can kill ARC Rays can burnIii Welding and Cutting Sparks can cause fire or explosionCylinder may explode if damaged Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Installation SECTION Table of ContentsTechnical Specifications Power MIG InstallationUncrating the Power MIG Safety PrecautionsInstallation LocationOutput Polarity Connections AUXILIARY POWER RECEPTACLES GUN and Cable InstallationShielding GAS Cylinder may explode if damagedPower MIG Operation SECTION Wear eye, ear and body protec- tion OPERATIONB-2Operation To Start the Welder Procedure for Changing Drive AND IDLE Roll SetsWire Reel Loading READI-REELS, Spools or Coils Wire Drive Configuration Feeding Wire ElectrodeIdle Roll Pressure Setting Figure B.2b Making a WeldWire Feed Overload Protection Avoiding Wire Feeding ProblemsFAN Control Input Line Voltage VariationsPower MIG Accessories SECTION Accessories Installed 3ACCESSORIESC-3Making a Weld with the Spool GUN Adapter KIT and Spool GUNPower MIG Maintenance SECTION Maintenance Table D.1 Liner Removal and Replace MentEnglish Metric Description Size GUN Handle DisassemblyFigure D.2 Major Component Locations Power MIG Theory of Operation SECTION Line SwitchTheory of Operation Figure E.2 Input Power CircuitFigure E.3 Control Circuits Output Rectification Contactor and Control BoardFigure E.4 Optional Circuits Control BOARD, GUN Trigger and Wire Drive MotorThermal and Overload Protection Wirefeed Overload ProtectionProtective Devices and Circuits Power MIG TROUBLESHOOTING AND REPAIR SECTION How To Use Troubleshooting Guide Troubleshooting and RepairPC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor Your body These capacitors is toxicAvoid contact with any portion Function Problems Wire Speed Potentiometer Test Welding Problems Weld bead is narrow or ropy Make sure the welding proce Materials Needed Main Transformer TestTest Description Main Transformer Test Test ProcedureON/OFF Power Switch will be hot during these tests X10 Input Voltage Test Points Table F.1. Test PointsWire Drive Motor and Wire Speed Potentiometer Test White BlackVDC Test for Feedback Voltage to Control Board1109 a Power MIG Output Bridge Rectifier Test Output Bridge Rectifier Test Negative LeadContactor Test Figure F.7. Contactor Terminals and Leads Contactor TestTypical Output Voltage Waveform Machine Loaded MAX TAP G Volts 10.0Normal Open Circuit Voltage Waveform MAX TAP G Volts 20.0Machine Loaded to 180 Amps AT 16 VDC Scope Settings Volts 20.0 Description Control Board ReplacementProcedure Control Board ReplacementWire Drive Motor Assembly Replacement Wire Drive Motor Assembly Replacement Wire DriveBolt Gas Hose TOC Output Diode Bridge Rectifier Replacement Output Diode Bridge Rectifier Mounting Bracket Mounting Bolts Rectifier Power MIG Output Capacitors Replacement Figure F.14. Capacitor Bank Location Output Capacitors ReplacementLead Mounting Bolts Nuts Lock washers 3 places Power MIG Main Transformer Replacement 41TROUBLESHOOTING and Repair F-41See Figure F.17 Main Transformer ReplacementFigure F.17. Leads X9, X10, 104B,104C, & H1B ReplacementX2 X3 X4 X5 X6 X7 Lead Power MIG FAN BLADE/MOTOR Replacement Perform the Output Capacitor Bank Removal Procedure FAN BLADE/MOTOR ReplacementOutput Contactor Replacement Figure F.24 Output Contactor ReplacementMounting Bolts Retest After Repair Table of Contents Electrical Diagrams Section Electrical DiagramsPOWEr miG Power MIG 215 208/220/230VPower MIG 215 208/220/230V for Codes 11099 L12308 SchEmaTic cOmplETE machiNE cODE 11247 l12308 pG1SchEmaTic cOmplETE machiNE cODE 11247 l12308 pG2 ElEcTrical DiaGramS ElEcTrical DiaGramS ElEcTrical DiaGramS ElEcTrical DiaGramS ElEcTrical DiaGramS ElEcTrical DiaGramS