Lincoln Electric SVM 119-A service manual Control PC Board G2803 Layout, Wirematic 255 Control

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G-5

ELECTRICAL DIAGRAMS

G-5

Control PC Board (G2803) Layout

2803

G

 

 

 

 

G2803

WIREMATIC 255 CONTROL

 

CAPACITORS = MFD/VOLTS

RESISTORS = OHMS

 

THIS SHEET CONTAINS PROPRIETARY INFORMATION

 

3-24-95A

 

 

 

 

 

 

 

 

 

 

 

 

EQUIP.

WM-255

 

 

 

 

OWNED BY THE LINCOLN ELECTRIC CO. AND IS

 

 

 

 

 

 

THE LINCOLN ELECTRIC CO. TYPE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOT TO BE REPRODUCED, DISCLOSED OR USED

 

 

 

 

 

 

 

CLEVELAND, OHIO U.S.A.

SUBJECT

 

 

CONTROL P.C. BOARD ASSEMBLY

 

WITHOUT THE EXPRESS PERMISSION OF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCALE FULL

 

 

 

 

 

SHT.

G 2803

 

THE LINCOLN ELECTRIC CO.

 

 

 

 

 

 

 

F.V.

 

REF.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DR

 

DATE

9-19-94

CHK

FV

 

 

 

SUP'S'D'G

 

 

 

 

 

 

 

 

 

 

 

 

NO.

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not

 

available from Lincoln Electric. This information is provided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result

 

in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.

WIRE-MATIC 255

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Contents WIRE-MATIC Safety Depends on YouARC Rays can burn SafetyElectric Shock can kill Fumes and Gases can be dangerousCylinder may explode if damaged Welding Sparks can cause fire or explosionIii Electric and MAG- Netic FieldsMay be dangerous Précautions DE Sûreté Sûreté Pour Soudage a L’ArcWIRE-MATIC Table of Contents Table of Contents Installation Table of Contents Installation SectionTechnical Specifications Wire-Matic-255 Input Connections Safety PrecautionsSelect Proper Location StackingFuse and Wire Sizes Connect Shielding GAS Reconnect Procedure Figure A.4 Input Gas Supply ConnectionsFigure A.5 Reconnect Diagram For 208/230/1/60 Machines Connect Output Components ConnectionsWire Size Conversion Parts GUN and Cable InstallationWIRE-MATIC Table of Contents Operation Section OperationWELDING, Cutting Safety InstructionsGeneral Description Design Features Advantages Recommended Processes and EquipmentDuty Cycle Amps Volts Machine CapabilityLimitations Controls and Settings Figure B.1 Operator ControlsUsing the Wire Drive Roll Figure B.2 Wire Reel LoadingFeeding Electrode Setting Idle Roll Pressure Operating StepsMaking a Weld WIRE-MATIC Accessories Table of Contents Accessories SectionK672-1 Spool GUN Adapter KIT OPTIONS/ACCESSORIESMagnum GUN Connection KIT Optional K466-6 Making a Weld with the Spool GUN Adapter K672-1 Installed Timer KIT K585-1 Timer KIT Installation Optional K585-1K468 8 Spool Adapter Drive Roll Kits64 1.2mm Aluminum Feeding KIT K673-1 K363P READI-REEL AdapterDual Cylinder Mounting KIT K671-1 Maintenance Table of Contents Maintenance SectionRoutine and Periodic Maintenance Perform the following dailyMaintenance Drive Rolls and Guide Tubes Cable CleaningContact TIP and GAS Nozzle Installation GUN Tubes and NozzlesLiner Removal Replacement Figure D.2 Liner maintenanceGUN Handle Disassembly To open up the handleDescription English Size Metric Size WIRE-MATIC Table of Contents Theory of Operation Section Theory of OperationInput Line Voltage and Main TransformerOutput Rectification Feedback ControlConstant Voltage Output Figure E.4 Constant Voltage OutputWire Drive Motor FeedbackThermal Protection SCR Operation Figure E.6 SCR OperationWIRE-MATIC Troubleshooting & Repair Table of Contents Troubleshooting & Repair SectionHOW to USE Troubleshooting Guide Recommended Course of ActionBoard can be dam- aged by static electricity PC Board Troubleshooting ProceduresElectric Shock can kill Main Transformer Rectifier Assembly Test To Section TOC SCR Rectifier Perform the Wire Drive Motor Liquid elec Trolyte in these capacitors isPerform the Output Rectifier Materials Needed Main Transformer TestTest Description Main Transformer Test Test Procedure ON/OFF Power Switch will be hot during these testsLead Plug Location Static SCR Rectifier Assembly Test Leads Figure F.4 SCR 1 Test Points Active SCR Rectifier Assembly Test Leads Figure F.7 SCR Tester Circuit SCR connectionsWire Drive Motor and Tachometer Feedback Test Wire Drive Motor and Tachometer Feedback Test Test Procedure Test for Supply Voltage to Tachometer Test for Feedback Voltage to the Control BoardScope Settings Normal Open Circuit Voltage WaveformMachine Loaded to 250 Amps AT 26 VDC Scope Settings Typical Output Voltage Waveform Machine LoadedMachine Loaded to 220 Amps AT 22 VDC Scope Settings Troubleshooting & Repair Typical SCR Gate Voltage Waveform Control PC Board Removal and Replacement Removal and Replacement ProcedureRemoval and REPLACE- Ment Procedure Wire Drive Assembly Removal and Replacement Procedure Figure F.11 Wire Drive Assembly RemovalSCR Output Rectifier Removal & Replacement Right side heat sink See Figure F.14 Disconnection Heat Sink LeadCapacitor Bank Removal and Replacement Bank Removal Replacement ComponentsMain Transformer Removal and Replacement Power Switch FAN Motor and FAN Removal and Replacement FAN Motor and FAN Removal and Replacement Procedure Figure F.16 Fan Motor and Fan Removal ComponentsTroubleshooting & Repair Input Volts/Hertz Wire Speed RangeOpen Circuit Voltage 230/60 375WIRE-MATIC Table of Contents Electrical Diagrams Section WIRE-MATIC Electrical Diagrams Wiring Diagram 208/230 CodeWire Matic 255 230 / 460 Wiring Diagram 230/460/575 CodeControl PC Board G2803 Schematic Wirematic 255 Control Control PC Board G2803 Layout