Lincoln Electric INVERTEC STT Series Manuals

Lincoln Electric INVERTEC STT Series Manuals

Manuals and User Guides for Lincoln Electric INVERTEC STT Series. We have 1 Lincoln Electric INVERTEC STT Series manual available for free PDF download: Service Manual

Lincoln Electric INVERTEC STT Series Service Manual

Lincoln Electric INVERTEC STT Series Service Manual (132 pages)

Lincoln Electric INVERTEC STT/ STT II Series

Brand: Lincoln Electric | Category: Welding System | Size: 3.22 MB

Table of Contents

English

6
- Safety
  
  2
  - Electric Shock Can Kill
    3
  - Table of Contents
    6
- Installation
  
  8
  - Technical Specifications
    8
    
    Location
    9
    
    Stacking
    9
    
    Tilting
    9
    
    Machine Grounding and High Frequency Interference Protection
    9
    
    Input Connections
    9
    
    Supply Connections
    9
    
    Input Cable Installation and Connection
    10
    
    Ground Connection
    10
    
    Input Voltage Reconnect Procedure
    11
    
    Output Connections
    11
    
    Wire Feeder Output Connections
    11
- Operation
  
  13
- Maintenance
  
  33
- Theory of Operation
  
  33
  - General Description
    33
  - Input Voltage
    33
  - Reconnect, Protection Board, Rectification and Precharge
    34
  - Switch Boards
    35
  - Main Transformer, Output Rectification and Choke
    36
  - Control Board, Darlington Drive and Module
    37
  - Power Board
    38
  - Remote Protection Board
    38
  - Field Effect Transistor (FET) Operation
    39
  - Pulse Width Modulation
    40
    
    Minimum Output
    40
    
    Maximum Output
    40
  - Protective Circuits
    41
    
    Overload Protection
    41
    
    Thermal Protection
    41
  - Troubleshooting & Repair Section
    43
  - How to Use Troubleshooting Guide
    43
  - PC Board Troubleshooting Procedures
    44
  - Troubleshooting Guide
    45
    
    T1 Auxiliary Transformer Test
    54
    
    T4 Auxiliary Transformer Test
    59
    
    Input Rectifier Test
    65
    
    Capacitor Balance Test
    68
    
    Switch Board Test
    71
    
    Snubber Resistors Test
    75
    
    Power Board Test
    78
    
    Protection Board Test
    82
    
    Trigger Circuit Test
    85
    
    Darlington Module Removal and Replacement
    89
    
    Switch Board Replacement
    94
    
    Capacitor Removal and Replacement Procedure
    99
    
    Output Rectifier Removal and Replacement
    107
  - Retest after Repair
    111
  - Input Filter Capacitor Conditioning
    112
  - Environmental Protection
    112
Unknown

113
- Electrical Diagrams Section
  115
- Wiring Diagram
  115
- Control PC Board (G2782) Schematic 1
  116
- Troubleshooting and Repair
  
  117
  - Control PC Board (G2782) Schematic 2
    117
- Electrical Diagrams
  
  117
  - Control PC Board (G2782) Layout
    118
  - Power Board (L8033) Schematic
    119
  - Power Board (L8033) Layout
    120
  - Darlington Drive Board (G2778) Schematic
    121
  - Darlington Drive Board (G2778) Layout
    122
  - Switch Board (L8441) Schematic
    123
  - Switch Board (L8441) Layout
    124
  - Driver Board (L9134) Schematic
    125
  - Driver Board (L9134) Layout
    126
  - Protection Board (L7915) Schematic
    127
  - Protection Board (L7915) Layout
    128
  - Current Sense Board (M17591) Schematic
    129
  - Current Sense Board (M17591) Layout
    130
  - Remote Protection Board Schematic
    131

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