Lincoln Electric INVERTEC V250-S - Manual (Page 33)

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INVERTEC V250-S
SECTION F-1 TROUBLESHOOTING & REPAIR SECTION F-1
TABLE OF CONTENTS
-TROUBLESHOOTING & REPAIR SECTION-
TROUBLESHOOTING AND REPAIR SECTION.........................................................................SECTION F
HOW TO USE TROUBLESHOOTING GUIDE.............................................................................F-2
PC BOARD TROUBLESHOOTING PROCEDURES ...................................................................F-3
TROUBLESHOOTING GUIDE .....................................................................................................F-4
TEST PROCEDURES
AUXILIARY TRANSFORMER TEST ...................................................................................F-11
INPUT RECTIFIER TEST ....................................................................................................F-15
POWER BOARD RESISTANCE TEST................................................................................F-19
OUTPUT DIODE TEST........................................................................................................F-23
POWER BOARD VOLTAGE TEST......................................................................................F-27
CONTROL BOARD VOLTAGE TEST..................................................................................F-31
PROTECTION CIRCUIT TEST............................................................................................F-35
CAPACITOR BALANCE TEST ............................................................................................F-39
REPAIR AND REPLACEMENT PROCEDURES
CONTROL BOARD REMOVAL AND REPLACEMENT.......................................................F-43
POWER BOARD REMOVAL AND REPLACEMENT...........................................................F-45
FILTER CAPACITOR REMOVAL AND REPLACEMENT....................................................F-49
INPUT RECTIFIER BRIDGE REMOVAL AND REPLACEMENT ........................................F-53
OUTPUT DIODE ASSEMBLY REMOVAL AND REPLACEMENT ......................................F-57
(MACHINE CODES BELOW 10150)
OUTPUT DIODE ASSEMBLY REMOVAL AND REPLACEMENT ......................................F-61
(MACHINE CODES ABOVE 10150)
MAIN TRANSFORMER REMOVAL AND REPLACEMENT ................................................F-65
(MACHINE CODES BELOW 10150)
MAIN TRANSFORMER REMOVAL AND REPLACEMENT ................................................F-71
(MACHINE CODES ABOVE 10150)
RETEST AFTER REPAIR ..........................................................................................................F-77