OM-236 891 Page 78
7-7. Removing Right Side Panel and Measuring Input Capacitor Voltage In
575 Volt Models Prior To MA380007G
Turn Off welding power source, and
disconnect input power.
1
Right Side Panel
To remove panel, remove screws
securing panel to unit.
2
Relinking Board PC10
3
Voltmeter
Measure the dc voltage across the
screw terminals on PC10 as shown
until voltage drops to near 0 (zero)
volts.
Proceed with job inside unit. Reinstall
right side panel when finished.
Tools Needed:
5/16 in.
Ref. 805 142-A / Ref. 805 145-A
!
Significant DC voltage can remain on
capacitors after unit is Off. Always check
the voltage as shown to be sure the input
capacitors have discharged before working
on unit.
2
3
+ lead to lower right
terminal,
−
lead to
upper right terminal
1
