Miller Invision 456P Mode D'emploi page 23

4-3. Removing Case and Measuring Input Capacitor Voltage
Tools Needed:
5/16 in
OM-186 989 Page 20
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 be-
fore working on unit.
2
3
+ lead to lower right
terminal, – lead to
upper right terminal
1
Turn Off welding power source,
and disconnect input power.
1 Right Side Panel
To remove panel, remove screws
securing panel to unit.
2 Interconnect Board PC2
3 Voltmeter
Measure the dc voltage across the
screw terminals on PC2 as shown
until voltage drops to near 0 (zero)
volts.
Proceed with job inside unit. Rein-
stall cover when finished.
Ref. ST-801 718 / Ref. ST-801 536-A