Retest After Repair - Lincoln Electric IDEALARC SP-250 Service Manual

TROUBLESHOOTING & REPAIR
TABLE OF CONTENTS
- TROUBLESHOOTING & REPAIR SECTION -
TROUBLESHOOTING & REPAIR SECTION ........... Section F
How to use Troubleshooting Guide ..................................F-1
PC Board Troubleshooting Procedures............................F-2
Troubleshooting Guide............................................F-3 - F10
Explanation of Prompting Error Messages ............F11 -F-13
Test Procedures
SP-250 Main Transformer Test............................F-14 - F-18
Static SCR Rectifier Test .....................................F-19 - F-21
Active SCR Rectifier Test.....................................F-22 - F-24
SP-250 Keypad Resistance Test .........................F-25 - F-27
Wire Drive Motor and Tach Feedback Test .........F-28 - F-31
Oscilloscope Waveforms .....................................F-32 - F-36
Replacement Procedures
Control Board Remove/Replace..........................F-37 - F-38
Keypad Remove/Replace ....................................F-39 - F-40
Wire Drive Assembly Remove/Replace...............F-41 - F-42
SCR Output Rectifier Remove/Replace ..............F-43 - F-44
Capacitor Bank Remove/Replace .......................F-45 - F-46
Main Transformer Remove/Replace....................F-47 - F-48
Fan Motor Remove/Replace................................F-49 - F-51
Retest After Repair .........................................................F-52
IDEALARC SP-250