Lincoln Electric SVM151-A service manual PC Board ASSEMBLY-POWER

Page 112

TOC

G-12

ELECTRICAL DIAGRAMS

G-12

PC BOARD ASSEMBLY-POWER

 

 

N.A.

N.A.

 

4.30

3.85~.04

 

 

3.65

N.B.

 

 

2

.20

 

0

 

 

.20

 

1

0

4.50~.04

ITEM

REQ'D

PART NO

IDENTIFICATION

CAPACITORS = MFD/VOLTS

RESISTORS = OHMS, 1/4 WATT (UNLESS OTHERWISE SPECIFIED)

 

ITEM

REQ'D

PART NO.

DESCRIPTION

 

 

 

 

 

 

1

1

G3699-B

P.C. BOARD BLANK

N.A.

2

1

M16100-43

ELECTRONIC MODULE

 

3

100 g

E2527

EPOXY ENCAPSULATING RESIN

350

ASSEMBLY

NO.SHT. L 11078-1

MULTI-WELD

BUS P.C. BOARD

 

 

 

 

 

SUP'S'D'G

EQUIP. TYPE

40V DC

 

 

 

 

 

 

 

SUBJECT

 

REF.

 

RT

 

 

 

LINCOLNTHEELECTRIC CO.

CLEVELAND,OHIO U.S.A.

 

CHK

SCALEFULL

DR

 

 

 

99 - 26 - 3

 

 

 

DATE

 

 

 

RMT/

XE-UF 9-17-99

OTHERWISE SPECIFIEDTOLERANCE

 

ONALL ANGLES IS .5 OF A DEGREE

TO AGREE

 

 

t

ON HOLE SIZESE2056PER ON2 PLACE DECIMALS 02IS. ON3 PLACE DECIMALS002IS.

MATERIALTOLERANCE ("")

WITHSTANDARDS.PUBLISHED

Return

Return to Master TOC

L 11078-1

N.A. CAUTION:THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC

ELECTRICITY. SEE E2454 BEFORE HANDLING.

N.B. THESE HOLES TO BE KEPT FREE OF POTTING MATERIAL. (.50 DIA. MIN.)

N.C. COVER EXPOSED BOTTOM SURFACE OF ELECTRONIC MODULE TO AVOID

POTTING MATERIAL BUILD UP.

MAKE PER E1911

}

POT PER E1911-E

 

TEST PER E3862

MANUFACTURED AS:

SCHEMATIC REFERENCE - M19330

L11078-1B0

 

 

}

 

IDENTIFICATION CODE

UNLESS

 

 

 

AND IS

 

 

 

SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC CO.

NOT TO BE REPRODUCED, DISCLOSED OR USED

WITHOUT THE EXPRESS PERMISSION OF

THE LINCOLN ELECTRIC CO.

THIS

 

 

 

CAD

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 pro- vided 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.

MULTI-WELD 350

Image 112
Contents Multi-Weld TM 350 Arc Converter Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications MULTI-WELD 350 K1735-1Safety Precautions QUICK-CONNECT PIG-TAILSWork Connection Case GroundingFixed Parallel Operation Power Source Setup Converters Cable Size On Cable AWG mm2Table of Contents Operation Section Operation Safety InstructionsOperating Instructions Versatile Product DescriptionPortable MULTI-SYSTEM Power Source PIG-TAIL Leads and ConnectorsRecommended Equipment and Processes Distribution BOXCC Mode Stick Welding and Gouging CV Mode Wire WeldingRemote Output Control Options Input Power/ Mode Switch has three positions Front Panel ControlsRecessed Panel Controls For CC STICK/GOUGE Mode only Paralleled ConvertersTransporting and Storage of the MULTI-WELD Cable HandlingProtection Features MULTI-WELD Table of Contents Accessories Section Accessories OPTIONS/ACCESSORIESSemiautomatic Welding Accessories Connection of Lincoln Electric Wire FeedersTo Work MULTI-WELD Maintenance Section Table of ContentsSection D-1 Maintenance MaintenanceSee additional warning information throughout this manual Service Figure D.2 Major Component LocationsMULTI-WELD Table of Contents Theory of Operation Section Theory of Operation General DescriptionPower Modules and FEED- Back Figure E.3 Power Modules and FeedbackAnalog Control Power Supply Board and Weld Control Board Mode Selector and Output Controls Figure E.5 Mode Selector and Output ControlsOVER-VOLTAGE Protection Insulated Gate Bipolar Transistor Igbt Operation Pulse Width Modulation 8E-8Chopper Technology Fundamentals 70-80VDCMULTI-WELD Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityTroubleshooting Guide Power Supply Board TestPerform the DC Buss Supply Board TestSpecifications Perform the Input ContactorCoil Resistance and Supply Voltage TestInput Voltage and Resistance TestFunction Problems Tion and Adjustment Test Analog Control Power Supply Board TestSee the Digital Meter Calibra Perform the DC Buss Supply Welding Problems Troubleshooting & Repair Troubleshooting & Repair Test Description Case Cover Assembly Removal Replacement ProcedureMaterials Needed Removal Procedure Replacement ProcedurePower Module Capacitor Discharge Procedure Procedure Figure F.2 Power Module Capacitor Terminal DischargeInput Contactor Coil Resistance and Supply Voltage Test Coil Test Procedure Perform the Power Module Capacitor Discharge procedureInput Contactor Coil Resistance Supply Voltage Test Leads #303A #330Test for Contact Continuity Supply PC Board TestAnalog Control Power Supply PC Board Test Test Procedure Figure F.4 Analog Control Power Supply PC BoardPower Supply PC Board Test DC Buss Power Supply PC Board Test DC Buss Power Supply PC Board P46 P47Table F.2 DC Buss Power Supply PC Board Voltage Table Chopper PC Board Input Voltages and Resistance Test Figure F.6 Power Module Assembly Details Chopper PC Board Input Voltages Resistance TestTest Procedure for the Left Side Power Module Power Module Capacitor Discharge ProcedureScope Settings CC Mode Input Voltage Applied 75 VDCNormal Open Circuit Voltage Waveform CV Mode Output Control AT Maximum Machine Loaded to 350 Amps AT 34 Volts CC-STICK Mode Normal Weld Voltage WaveformMachine Loaded to 350 Amps AT 34 Volts CV Mode CV Mode Output Control AT Minimum Case Front Assembly Removal and Replacement DescriptionReplace the case cover Weld Control or Peripheral PC Board Removal and Replacement Figure F.8 Case Front Assembly Details Replacement Procedure Description Digital Meter Removal Procedure Lens Bezel Spacer Seal KnobOutput Control Potentiometer Removal Procedure Refer to Figure F.9Input Contactor Removal and Replacement Figure F.10 Input Contactor Assembly Details Lead #331Replacement Procedure Input Diode Removal and Replacement Figure F.11 Input Diode Assembly Details 25-27 300-324 Refer to Figure F.11FAN Motor Assembly Removal and Replacement Figure F.12 FAN Motor Assembly Details Perform the Input Diode Replacement procedure Perform the Input Diode Removal proce- durePower Capacitor Removal and Replacement Figure F.13 Power Capacitor Mounting Details Reassembly Chopper PC Board and Diode Module Removal and Replacement Chopper PC Board Removal and Replacement RemovalReplacement Refer to Figure F.14Diode Module Removal and Replacement Figure F.15 Diode Module Mounting DetailsRefer to Figure F.15 Figure F.16 Diode Module Tightening Sequence Retest After Repair Idle AmpsOpen Circuit Voltages Load TestElectrical Diagrams Table of Contents Electrical Diagrams SectionMULTI-WELD 350 Wiring Diagram Wiring Diagram MULTI-WELDSchematic Control PC Board #1 Schematic Control PC Board #2 Schematic Control PC Board #3 Schematic Control PC Board #4 Schematic Control PC Board #5 PC Board ASSEMBLY-CONTROL RESISTOR,SMD,1W,243OHMS,1%Schematic Peripheral Printed Circuit Board PC Board ASSEMBLY-PERIPHERAL PC Board Reference Description DesignatorsSchematic Power Printed Circuit Board PC Board ASSEMBLY-POWER Return to Section Return to Section TOC To Section TOCSchematic Analog Printed Circuit Board PC Board ASSEMBLY-ANALOG Schematic BY-PASS Printed Circuit Board PC Board Assembly BY-PASS Schematic Chopper Printed Circuit Board 19303 MPC Board Assembly Chopper SVM Error Reporting Form