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INVERTEC STT Series
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 (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
Operating Instructions
13
Safety Instructions
13
General Description
14
Recommended Equipment
14
Operating Controls
14
Design Features
14
Welding Capability
14
Limitations
14
Section a
14
Operational Features and Controls
15
Welding Operation
16
Welding Parameters and Guidelines
16
Input Filter Capacitor Discharge Procedure
29
Preventive Maintenance
30
Theory of Operation .............................................................................................................Section E
32
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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