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Welding System
9939
Lincoln Electric 9939 Manuals
Manuals and User Guides for Lincoln Electric 9939. We have
1
Lincoln Electric 9939 manual available for free PDF download: Service Manual
Lincoln Electric 9939 Service Manual (112 pages)
Brand:
Lincoln Electric
| Category:
Welding System
| Size: 1.57 MB
Table of Contents
Table of Contents
6
Safety
2
Table of Contents
6
Installation
7
Technical Specifications
8
Safety Precautions
9
Select Proper Location
9
Stacking
9
Tilting
9
Input Electrical Connections
10
Fuse and Wire Sizes
10
Reconnect Procedure
11
Connect Output Cables
14
Installation of Field Installed Accessories
14
Installation of Wire Feeders
14
Paralleling
14
Operation - Operation Section -
17
Operation
17
General Description
18
Safety Instructions
18
Limitations
19
Machine Capability
19
Recommended Processes and Equipment
19
Controls and Settings
20
Local/Remote Switch
20
Power Switch
20
Voltage Adjustment Control Knob
20
Wire Feeder Voltmeter Switch
20
10. Wire Feeder Receptacle
21
42-Volt Circuit Breaker
21
Digital Voltmeter/Ammeter
21
Thermal Protection Indication Light
21
Volts/Amps Switch
21
Adjusting the Output Voltage Using the Digital Meter
22
Operating Steps
22
Starting the Machine
22
Using Auxiliary Power
22
Using Local/Remote Switch Operation
22
Machine and Circuit Protection
23
Accessories
25
Connecting Wire Feeder to the
26
Field Installed Accessories
26
Connecting Remote Control (K857) to
27
Maintenance
29
Routine and Periodic Maintenance
30
Safety Precautions
30
Theory of Operation
33
Power Supply Operation
34
Protection Devices and Circuits
36
SCR Operation
37
Troubleshooting & Repair - Troubleshooting & Repair Section -
39
How to Use Troubleshooting Guide
40
PC Board Troubleshooting Procedures
41
Troubleshooting Guide
42
Diagnostic Routines and Error Codes
49
Main Transformer Test
50
Test Procedures
51
Static Output Rectifier Bridge Test
53
Active SCR Rectifier Assembly Test
57
Normal Open Circuit Weld Voltage Waveform no Load - Output Control at Maximum
61
Typical DC Weld Output - Machine Loaded
62
Abnormal Output Weld Voltage Waveform - Machine Loaded Capacitor Bank Not Functioning
64
Abnormal Open Circuit Weld Voltage Waveform - no Load Capacitor Bank Not Functioning
65
Typical SCR Gate Voltage Waveform
66
Control PC Board Removal and Replacement
67
Capacitor Bank Removal and Replacement
69
Output Rectifier Bridge Removal and Replacement
72
Mounting of Stud Type Diodes to Aluminum Heat Sinks
74
SCR Removal and Replacement
76
Fan Motor and Fan Removal and Replacement
82
Center Assembly Removal and Replacement
84
Retest after Repair
86
Electrical Diagrams
101
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