Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 45

D-3
MAINTENANCE
FIGURE D.1 – RESISTOR LOCATIONS
5 PAIRS OF RESISTORS
CHECK VOLTAGES BETWEEN EACH
TERMINAL AND FROM EACH RESISTOR
TO CASE GROUND
5. Locate two sets of two resistors on the left side of
the machine and three sets of two resistors on the
right side of the machine. See Figure D.1. Do not
touch the resistors or any other internal machine
component. Using a DC voltmeter, check for any
DC voltage that may be present across the termi-
nals of each resistor and from each resistor to
case ground (20 measurements in all). If a voltage
is present, be careful not to touch these resistors.
WARNING
ELECTRIC SHOCK can kill.
• Proceed with caution being care-
ful not to touch any internal
machine components during the
discharge procedure.
POWER WAVE 450
D-3