Lincoln Electric SVM101-B service manual PC Board Assembly Driver L8660, Identification

Page 104

 

 

G-12

 

ELECTRICAL DIAGRAMS

 

G-12

Return to Section TOC

Return to Master TOC

PC BOARD ASSEMBLY - DRIVER - (L8660-[])

 

 

 

 

 

 

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TOC

TOC

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toSection

toMaster

 

 

 

 

 

Return

Return

 

 

 

 

 

TOC

TOC

 

 

 

 

 

Section

Master

 

Item

Identification

 

 

 

 

 

 

 

to

to

 

CR1, CR2, CR3, CR4

RELAY, SPNO 24VDC 6000 ohms

 

 

 

 

AG-CDO

 

 

Return

Return

 

 

 

 

 

D1

DIODE, AXLDS 1A 400V

 

 

 

 

 

 

 

 

 

 

DZ1, DZ2

DIODE, Zener 1W 12V 5%

 

 

 

 

 

 

1N4742A

 

 

 

 

 

J9, J10, J16

CONNECTOR, Molex mini PCB

 

 

6 pin

 

 

 

 

 

J11

CONNECTOR, Molex mini PCB

 

 

 

 

 

 

4 pin

 

 

 

 

 

P9, P10, P16 (plugs into

PLUG, Molex mini 6 pin

 

 

 

 

 

J9, J10, J16)

 

 

 

 

 

 

P11 (plugs into J11)

PLUG, Molex mini 4 pin

TOC

TOC

 

 

 

Q1, Q2

TRANSISTOR, NMFT247 4A 900V

 

 

 

R1, R2, R13, R14

RESISTOR, WW 20W 5% 250K

Sectionto

Masterto

 

 

 

R3, R4, R5, R6, R8, R9,

RESISTOR, MF .25W 1% 150K

 

 

 

 

 

 

 

 

 

 

R7, R12

RESISTOR, MF .25W 1% 100K

Return

Return

 

 

 

T1

TRANSFORMER, PCB

 

 

 

NOTE: Individual parts listed are not available from Lincoln Electric.

 

 

 

 

 

 

 

 

 

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.

V300-I

 

 

 

 

 

 

 

 

 

 

 

Image 104
Contents Invertec Safety Fumes and Gases can be dangerous Electric Shock can killARC Rays can burn Safety Welding Sparks can cause fire or explosionCylinder may explode if damaged IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Section A-1 Table of ContentsInstallation Section Installation Three Phase Single Phase3INSTALLATIONA-3 Product Description Electrical InstallationInput Voltage Setup LocationPower Input Connection Connection of Wire Feeders to the InvertecSingle Phase Input Three Phase InputParallel Operation Remote Control of InvertecK900-1 DC TIG Starter Connection Quick Disconnect Plugs 6INSTALLATIONA-6Output Cables Operation Section Section B-1Operation Operating InstructionsDuty Cycle Control Function / OperationMode Switch Full Range Is Is Very Soft, 10 Is Very CrispMeter Polarity Switch Auxiliary PowerAccessories Section Section C-1Accessories Options / AccessoriesMaintenance Section Section D-1Maintenance Input Filter Capacitor Discharge ProcedurePreventive Maintenance Overload ProtectionFigure D.2 Location of Maintenance Components Theory of Operation Section Section E-1Theory of Operation Input Line Voltage & Auxiliary TransformerPrecharge & Protection Circuits Return to Return to Section TOCSwitch Boards Figure E-4 ---SWITCH Circuits & TransformerOutput and Control Circuits Figure E-5 --OUTPUT & Control CircuitsPassive Maximum Output Pulse Width ModulationMinimum Output Thermal Protection Protective CircuitsOverload Protection Troubleshooting & Repair Section Section F-1Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Matched Parts Additional Information Oscilloscope WarningInput Filter Capacitor CONDITION- ING Feeding Problems DepartmentFeeding Problems See Input Rectifier test See Output Diodes test See Switch Board test V300-I 11TROUBLESHOOTING & REPAIRF-11 Input Filter Capacitor Discharge ProcedureInput Filter Capacitor Discharge Procedure Figure F.I Location of Input Filter Capacitor TerminalsOutput Pilot Circuit Test Test Procedure G2527 J2 J4 J3V300-I Protection Board Output Test Test Procedure Turn Power Switch OFF313 306 J15 275F 311 V300-I Protection Figure F.6 Inserting ProbesCapacitor Balance Test Static Capacitor Test 912 V300-I Switch Board Test Switch Board Test Switch Board Test Table F.3 Snubber Resistor Test Snubber Resistor Test Check Test Result Conclusion Next Test Step Repair ActionOutput Diode Test Test Procedure Output Diode TestInput Rectifier Test Probe Acceptable Meter Reading Table F.5Points Steps Overcurrent Protection Current Trigger Test Overcurrent Protection Current Trigger Test 302 G2527 Control J1 275DControl Overvoltage Protection DC Trigger Circuit Test Overvoltage Protection DC Trigger Circuit Test Figure F.16 PC Boards Removed306 275F 309 310 1J8 #311 1J14 6J6 #302 #313 #275D3J8 2J14 1J6 #301 #305Thermal Protection AC Trigger Circuit Figure F.20 PC Boards Moved for Access Thermal Protection AC Trigger CircuitFigure F.21 Thermal Protection AC Trigger Circuit V300-I Power Board Test Test B Power Board TestTest a Figure F.23 Power Board Test Points Simplified Trigger Circuit Capacitor Removal and Replacement Procedure Capacitor Removal and Replacement ProcedureFigure F.27 -- Removing Capacitor Nuts Figure F.27 Switch Board Removal and Replacement Procedure Switch Board Replacement ProcedureTest After Switch Board or Capacitor Replacement Test After Switch Board or Capacitor Replacement Perform Retest After RepairOutput Diode Replacement Procedure 60TROUBLESHOOTING & REPAIRF-60 Output Diode Replacement Procedure61TROUBLESHOOTING & REPAIRF-61 Procedure Diode ModulesRetest After Repair OCV at rated Input V300-PROOutput Min. Acceptable Max. All Modes V300-I V300-PROElectrical Diagrams Section Section G-1Wiring Diagram Entire Machine Code 9826 L8657 #0#Wiring Diagram Entire Machine Code 9827 L8938 ReturnWiring Diagram Entire Machine Code 10036 L9299 Wiring Diagram Entire Machine Code 10037 L9300 $ $Wiring Diagram Entire Machine Code 10132 L9567 SectionWiring Diagram Code Wiring Diagram Entire Machine Code 10133 L9568Wiring Diagram Entire Machine Code 10258 L10189 $& $V300-I Wiring Diagram European Wiring Diagram Entire Machine Code 10336, 10450 L10205Schematic Entire Machine # . $ #$ !#$ #! %&$Schematic Driver PC Board S20216 PC Board Assembly Driver L8660 IdentificationSchematic Driver PC Board S20799 PC Board Assembly Driver DescriptionSchematic Switch PC Board L8440 PC Board Assembly Switch L8441 CAPACITOR, Cemo 2700P 50V 5%Schematic Switch PC Board L10956 PC Board Assembly Switch L10958-1 Reqd IdentificationSchematic Control PC Board G2525 Electrical Diagrams CAPACITOR, Cemo 150P Schematic Protection PC Board M16097 PC Board Assembly Protection L7915-2 DZ1Schematic Power PC Board M16018 PC Board Assembly Power L8033-7 VOLT. REG. & Heat Sink Asbly