Removing Case And Measuring Input Capacitor Voltage - Miller Electric INVISION 456 CC Owner's Manual

6-3. Removing Case and Measuring Input Capacitor Voltage

Tools Needed:
5/16 in
!
Significant DC voltage can remain on capac-
itors after unit is Off. Always check the volt-
age as shown to be sure the input capacitors
have discharged before working on unit.
1
1
2
3
+ lead to lower right
terminal, − lead to
upper right terminal
Turn Off welding power source, and
disconnect input power.
1 Outside Handle Screws
To loosen top, remove two outside
handle screws from both handles
and all side bolts.
2 Interconnecting Board PC2
3 Voltmeter
Measure the dc voltage across the
screw terminals on RC3 and RC5
as shown until voltage drops to near
0 (zero) volts.
Proceed with job inside unit. Rein-
stall cover when finished.
802 260 / 801 536
OM-203 034 Page 27