Table F.1. Test Points | Lincoln Electric SVM157-A specs

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F-14	TROUBLESHOOTING AND REPAIR			F-14
		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 missing, 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 con- nection. 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 trans- former may be faulty. Replace.

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

POWER MIG 200

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Lincoln Electric SVM157-A service manual Table F.1. Test Points, Input Voltage Test Points

Contents

Power MIG Safety Depends on You Safety California Proposition 65 Warnings Electric Shock can kill ARC Rays can burn Cylinder may explode if damaged Iii Précautions DE Sûreté Sûreté Pour Soudage a L’Arc Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Power MIG 3INSTALLATIONA-3 Figure A.1 Dual Voltage Machine Input Connections Output Polarity Connections Figure A.2 Triple Voltage Machine Input Connections GUN and Cable Installation Shielding GASCylinder may explode if damaged Operation Section Operation Section B Operation Wear eye, ear and body protec- tion Wire Drive Roll Wire Size Conversion PartsProduct Description Recommended Processes and Equipment Procedure for Changing Drive and Idle Roll Sets Wire Reel Loading READI-REELS, Spools or CoilsTo Start the Welder Feeding Wire Electrode Making a Weld Idle Roll Pressure Setting Avoiding Wire Feeding Problems Wire Feed Overload ProtectionFAN Control Input Line Voltage Variations Accessories Section Accessories Drive Roll KitsK363P READI-REEL Adapter Dual Cylinder Mounting KIT K1702-1 Installed Adapter KIT and Spool GUN Power MIG Maintenance Section Maintenance Cause poor wire feeding Liner Removal and REPLACE- MentThis screw should only be gently tightened Overtightening will split or collapse the liner GUN Handle Disassembly English Metric Description Size Maintenance Power MIG Line Switch Theory of Operation Section Theory of Operation Output Rectification Contactor and Control Board Motor Control Board Control BOARD, GUN Trigger and Wire Drive Motor Figure E.4 Optional Circuits Wirefeed Overload Protection Thermal and Overload Protection Power MIG Troubleshooting and Repair Section Troubleshooting and Repair Section F Troubleshooting and Repair How To Use Troubleshooting Guide PC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor These capacitors is toxic Avoid contact with any portionYour body Function Problems Tachometer Feedback Test Welding Problems Weld bead is narrow or ropy Make sure the welding proce Main Transformer Test Test DescriptionMaterials Needed ON/OFF Power Switch will be hot during these tests Main Transformer Test X10 Table F.1. Test Points Input Voltage Test Points Wire Drive Motor and Tachometer Feedback Test Test Procedure Figure F.4. Plug J4 Disconnect the main AC input power to the machine Test for Supply Voltage to Tachometer Test for Feedback Voltage to Control Board VDC Output Bridge Rectifier Test Test Procedure Output Bridge Rectifier Test Contactor Test Contactor Test Figure F.7. Contactor Terminals and Leads Volts 10.0 Typical Output Voltage Waveform Machine Loaded MAX TAP G Volts 20.0 Normal Open Circuit Voltage Waveform MAX TAP G Machine Loaded to 180 Amps AT 16 VDC Scope Settings Volts 20.0 Control Board Replacement Description Control Board Replacement Procedure Wire Drive Motor Assembly Replacement Wire Drive Motor Assembly Replacement Wire Drive Bolt Gas Hose TOC Output Diode Bridge Rectifier Replacement Output Diode Bridge Rectifier Mounting Bracket Mounting Bolts Rectifier Power MIG Output Capacitors Replacement Output Capacitors Replacement Figure F.14. Capacitor Bank Location Lead Mounting Bolts Nuts & Lock washers Places Power MIG 41TROUBLESHOOTING and REPAIRF-41 Main Transformer Replacement Main Transformer Replacement See Figure F.17 Replacement Figure F.17. Leads X9, X10, 104B,104C, & H1B X2 X3 X4 X5 X6 X7 Lead Power MIG FAN BLADE/MOTOR Replacement FAN BLADE/MOTOR Replacement Perform the Output Capacitor Bank Removal Procedure Output Contactor Replacement Output Contactor Replacement Figure F.24 Mounting Bolts Retest After Repair Electrical Diagrams Table of Contents Electrical Diagrams Section Power MIG 200 208/230V Wiring Diagram Schematic Control PC Board PC Board ASSEMBLY-CONTROL G3851-1 SVM Error Reporting Form