Troubleshooting & Repair

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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

Lincoln Electric V250-S service manual Troubleshooting & Repair