Lincoln Electric 11521 service manual Main Transformer Test

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	F-14	TROUBLESHOOTING AND REPAIR			F-14
	F-14				F-14

		MAIN TRANSFORMER TEST (continued)
			TABLE F.1 – TEST POINTS

		INPUT VOLTAGE	TEST POINTS	EXPECTED VOLTAGE READING

		230 VAC	X1-X2		11.9-13.0 VAC

		230 VAC	X1-X3		14.1-15.2 VAC

		230 VAC	X1-X4		16.2-17.5 VAC

		230 VAC	X1-X5		18.4-19.7 VAC

		230 VAC	X1-X6		20.5-22.0 VAC

		230 VAC	X1-X7		22.7-24.2 VAC

		230 VAC	X1-X8		24.8-26.5 VAC

		230 VAC	X9-X10		26.9-28.8 VAC

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12.If ALL the voltages tested are incorrect or miss- ing, test for correct nameplate input voltage between the H1 lead at the ON/OFF POWER SWITCH to H2 or H3 at the reconnect panel. Voltage tested will vary depending on input voltage connection. See Wiring Diagram for test point locations.

A.If the input voltage test is incorrect, check for loose or broken leads between the reconnect panel and the ON/OFF POWER SWITCH.

B.Test the ON/OFF POWER SWITCH for proper operation.

13.If the correct nameplate voltage is being applied to the main transformer and one or more of the secondary voltages are missing or are incorrect, the main transformer may be faulty. Replace.

14.When test is complete, replace tool tray, case sides and top.

Power MIG® 215XT

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Contents Power MIG 215XT Safety Power MIG 215XTElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Précautions DE Sûreté Sûreté Pour Soudage a L’ArcSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Power MIG 215XTSafety Precautions Uncrating the Power MIG 215XTInput POWER, Grounding and Connection Diagrams LocationOutput Polarity Connections GUN and Cable Installation AUXILIARY POWER RECEPTACLESShielding GAS Cylinder may explode if damagedPower MIG 215XT Table of Contents Operation Section OPERATIONB-2 Wear eye, ear and body protec- tionOperation Wire Drive Roll Wire Size Conversion PartsProcedure for Changing Drive AND IDLE Roll Sets Wire Reel Loading READI-REELS, Spools or CoilsFeeding Wire Electrode When triggering, the electrodeTo Start the Welder Changing the Gun Receiver Bushing Electric Shock can killMaking a Weld Return to Return to Section TOCAvoiding Wire Feeding Problems Wire Feed Overload ProtectionFAN Control Input Line Voltage VariationsPower MIG 215XT Table of Contents Accessories Section Accessories Magnum 250LX PUSH-PULL GUN and Push Pull Adapter Make a Weld with the Magnum 250LX PUSH-PULL GUNMagnum 250LX Push Pull Gun K2704-1 Magnum 250LX Push Pull Adapter K2705-1Accessories Table of Contents Maintenance Section Maintenance Liner Removal and REPLACE- Ment Table D.1GUN Handle Disassembly English Metric Description SizeFigure D.2 Major Component Locations Power MIG 215XT 1TABLE of CONTENTS-THEORY of Operation Section E-1 Figure E.2 Input Power Circuit Theory of OperationOutput RECTIFICATION, Contactor Control Board Figure E.2 Optional Circuits Protective Devices and Circuits Power MIG 215XT 1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor Avoid contact with any portion These capacitors is toxicYour body Function Problems Tachometer Feedback Test Welding Problems BodyMake certain the shielding gas is Main Transformer Test Test DescriptionON/OFF Power Switch will be hot during these tests X4 X5X10 Main Transformer Test Wire Drive Motor and Tachometer Feedback Test J11 Wire Drive Motor and Tachometer Feedback Test J11 Output Bridge Rectifier Test Negative Lead Contactor Test Contactor Test Typical Output Voltage Waveform Machine Loaded MAX TAP G Machine Loaded to 200 Amps AT 22 VDCNormal Open Circuit Voltage Waveform MAX TAP G Machine Loaded to 180 Amps AT 16 VDC Troubleshooting and Repair Control Board Removal and Replacement Procedure Depress Locking TAB on Mounting PIN Wire Drive Motor Removal and Replacement Procedure Wire Drive Bolt Gas Hose TOC Test Description Output Diode Bridge Rectifier Output Diode Bridge RectifierMounting Bracket Mounting Bolts Rectifier Power MIG 215XT Output Capacitors Removal and Replacement Procedure Lower Right Case Wraparound Cover Capacitor Bank Assembly Lead Mounting Bolts Nuts & Lock washers Places Power MIG 215XT Main Transformer Removal and Replacement Procedure Main Transformer Mounting Bolts Replacement X4 X5 Lead Power MIG 215XT FAN Blade / Motor Removal and Replacement Procedure Rear Output Contactor Removal and Replacement Procedure Output Contactor Mounting Bolts Retest After Repair Table of Contents Diagram Section Power MIG 215XT 208/220/230V for Code POWEr miG 215XTSchEmaTic cOmplETE machiNE l12308-1 pG1 SchEmaTic cOmplETE machiNE l12308-1 pG2 Psoc 1pF Calibrate