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12478
Lincoln Electric 12478 Manuals
Manuals and User Guides for Lincoln Electric 12478. We have
1
Lincoln Electric 12478 manual available for free PDF download: Service Manual
Lincoln Electric 12478 Service Manual (95 pages)
Brand:
Lincoln Electric
| Category:
Welding System
| Size: 5 MB
Table of Contents
Table of Contents
6
Flexcut™ 125
6
Service Manual
6
Theory of Operation
8
Input Section
8
Switch Board and Main Transformer
9
User Interface Board, Voltage Divider Board and Cnc Connector
10
Output Board and Torch Connector
11
Insulated Gate Bipolar Transistor (Igbt) Operation
12
Pulse Width Modulation
13
Troubleshooting & Repair
14
How to Use Troubleshooting Guide
14
Pc Board Troubleshooting Procedures
15
Troubleshooting Guide
16
Error Codes
19
Test Procedures
22
Case Cover Removal and Replacement Procedure
22
Capacitor Discharge Procedure
25
Input Rectifier Test Procedure
27
Auxiliary Transformer (T1) Test Procedure
29
Fan and F.a.n. Circuit Test Procedure
32
Output Board Test Procedure
35
Choke Test Procedure
40
Thermostat Circuit Test Procedure
43
Auxiliary Rectifier (D4) Test Procedure
46
User Interface Board Test Procedure
48
Switch Board Test Procedure
51
Input Switch Test Procedure
57
Solenoid 1 & 2 Test Procedure
61
Main Transformer Test Procedure
63
Removal and Replacement Procedures
66
Input Rectifier Removal and Replacement Procedure
66
Auxiliary Transformer Removal and Replacement Procedure
69
Output Board Removal and Replacement Procedure
72
Choke Removal and Replacement Procedure
76
Thermostat Removal and Replacement Procedure
78
Auxiliary Rectifier Removal and Replacement Procedure
80
User Interface Board Removal and Replacement Procedure
82
Switch Board Removal and Replacement Procedure
84
Input Switch Removal and Replacement Procedure
87
Solenoid 1 & 2 Removal and Replacement Procedure
89
Main Transformer Removal and Replacement Procedure
92
Retest after Repair
95
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