Lincoln Electric SVM197-A service manual Procedure Field Diode Bridge Removal and Replacement

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Section TOC

Master TOC

F-33

TROUBLESHOOTING AND REPAIR

F-33

CAPACITOR AND/OR DIODE BRIDGE

REMOVAL AND REPLACEMENT PROCEDURE (continued)

FIGURE F.10 - FIELD DIODE BRIDGE LOCATION

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7A

201

201B

–

200

Feild Diode Bridge

+

9A

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PROCEDURE - FIELD DIODE BRIDGE REMOVAL AND REPLACEMENT

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1.Remove the engine spark plug wire.

2.With the 5/16” nut driver, remove the 8 sheet metal screws that hold the top cover to the control box. Remove the top cover.

3.With the 5/16” nut driver and wrench, remove the 6 screws that hold the control panel in place (2 in the front, 2 in the back, 2 in the bottom). Move the panel aside as far as the leads will allow.

4.Discharge the field capacitor by con- necting the jumper wire clips on the black and the red wire terminals on the top of the capacitor. See Figure F.9 for location. Leave the clips on for at least 5 seconds, then remove.

5.The field diode bridge (D1) is mount- ed to the sheet metal just above the capacitor. See Figure F.9. Remove it using the phillips head screw dri- ver.

6.With the needle nose pliers, gently remove the wires from the field diode bridge. Note lead locations.

7.Replace the wires to their appropri- ate locations on the new diode bridge:

Lead 200 attached to the positive (+) terminal. Depending on the bridge used, this corner may be beveled and/or marked with a + sign.

Lead 201 and 201B are piggy-backed on the negative (–) terminal, which will always be located diagonally across from the positive (+) terminal.

Leads 9A and 7A are attached to the AC side of the bridge and are attached to the other two corner terminals. Either lead can go on either terminal.

8.Mount the field diode bridge using the screw. Use the slot head screw- driver.

9.Check that the leads are not grounded and for clearance and tightness.

10.Replace the control panel and tighten the sheet metal screws with the 5/16” nut driver and 5/16” wrench.

11.Replace the top cover of the con- trol box and tighten the sheet metal screws with the 5/16” nut dri- ver.

12.The flashing diode (D2) is located just above the field capacitor and may be removed by cutting the cable tie.

POWERARC® 5500

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Contents Powerarc ISAFETYi Electric Shock can kill ARC Rays can burn SafetyIii For ElectricallyPrécautions DE Sûreté Electromagnetic Compatibility EMC Safety Master Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Powerarc InstallationLocation and Ventilation Safety PrecautionsStoring Engine Exhaust can killPRE-OPERATION Engine Service Muffler Deflector PowerArc 5500 Typical Fuel ConsumptionSpark Arrester Honda 9 HPElectrical Output Connections Powerarc 5500 Output ConnectionsWelding Cable Connections Cable Size and LengthCable Installation Auxiliary Power ReceptaclesPlugs and HAND-HELD Equipment Machine GroundingCircuit Breakers Premises WiringType Common Electrical Devices Possible Concerns Table A.2 Electrical Device USE with the PowerarcPowerarc Table of Contents Operation Section Operation Limitations Controls and SettingsOutput Panel Controls Physical Location of Components may vary by Code NoGasoline Engine Controls Engine OperationStarting the Engine Before Starting the EngineStopping the Engine Generator OperationGeneral Information Running the EngineTable B.3 Generator Power Applications Control Function / Operation Current Control Dial Welding OperationWelding Guidelines Material Thickness Electrode Type Size SettingWelding circuit for Stick shielded metal arc welding What Happens in the Arc?Correct Way to Strike An Arc Correct Welding PositionCorrect Arc Length Correct Welding SpeedTypes of Welds Common MetalsUse the following Do the followingWelding in the Vertical Position PenetrationVertical-Down Welding Vertical-Up WeldingOverhead Welding How to Hardface the Sharp Edge Metal to Ground WearHardfacing To Reduce Wear Welding Sheet MetalCast Iron Plate Preparation Welding Cast IronHigh-Speed Group AWS E6013 Selecting ElectrodesLow Hydrogen Group AWS E7018 Out-of-Position Group AWS E6011Powerarc Table of Contents Accessories Section Accessories OPTIONS/ACCESSORIESLincoln Electric Accessories Table of Contents Maintenance Section Maintenance Routine and Periodic MaintenanceEngine Maintenance Figure D.3 Clean Rotating SCREEN/FINGER GUARD/DEBRIS Guard Engine AdjustmentsPart Robin / Subaru Honda Table D.1 Engine Maintenance PartsDo not attempt to polish slip rings while engine is running GENERATOR/WELDER MaintenanceFigure D.6. Major Component Locations 1TABLE of CONTENTS-THEORY of Operation Section E-1 Theory of Operation Engine Control and IgnitionENGINE, EXCITATION, Rotor and Stator Return Rotor Field Feedback Auxiliary PowerWeld Winding and Reactor Auxiliary Power Overcurrent Protection1TABLE of Contents Troubleshooting and Repair F-1 HOW to USE Troubleshooting Guide 2TROUBLESHOOTING and REPAIRF-2Troubleshooting and Repair Output Problems Perform the Rotor and Flashing Voltage Test Troubleshooting and Repair Troubleshooting and Repair Rotor Resistance Test Engine Problems Troubleshooting and Repair Engine Throttle Adjustment Test Powerarc Materials Needed Test DescriptionRotor Voltage Test Procedure 14TROUBLESHOOTING and REPAIRF-14Flashing Voltage Test Procedure LeadRotor Resistance Test Procedure Rotor Resistance Test Procedure Figure F.3 Brushes Retained with Cable TIE Powerarc Engine Throttle Adjustment Test ROBIN/SUBARU Engine ROBIN/SUBARU Engine Engine Throttle Adjustment TestHigh Speed Stop Screw Scope Settings Normal Open Circuit Weld Voltage WaveformHigh Idle no Load Normal Open Circuit Voltage Waveform 115 VAC Supply Typical Weld Output Waveform Machine LoadedMachine Loaded to 125 Amps AT 23 VAC Brush Removal and Replacement Procedure Brush Removal and Replacement Procedure Powerarc Rheostat Removal and Replacement Procedure Rheostat Removal and Replacement Procedure Troubleshooting and Repair Capacitor AND/OR Diode Bridge Procedure Capacitor Removal and REPLACE- MentAttachment for 202A Cable Tie Capacitor Attachment for 201 201A JumperFigure F.10 Field Diode Bridge Location Procedure Field Diode Bridge Removal and ReplacementPowerarc STATOR/ROTOR Removal and Replacement Procedure STATOR/ROTOR Stator Removal ProcedureSection TOC Rotor Removal Procedure Procedure Reactor Bolts Lead Retest After Repair Auxiliary Power Receptacle OUTPUT1Engine Output WELDER/GENERATOR OUTPUT1Powerarc Table of Contents Diagram Section Wiring Diagram Codes 11182, 11187, 11329 S25984 Electrical DiagramsSwitch Wiring Diagram Codes 11403, 11405 S26829Wiring Diagram Code 11404 S26830 Wiring Diagram Power ARCWiring Diagram Code 11215 S26023 S26008 Schematic -CODES 11182, 11187, 11329 S26008S26881 Schematic Codes 11403, 11405 S26881S26882 Schematic Code 11404 S26882
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