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4-8. Control Board PC1 Connections For Non-Parallel AC Arcs Or Parallel Synchronized
AC Arcs
Y If there are any questions regarding this procedure,
contact the factory before connecting units.
1
3
2
3
PC1 Viewed From Rear Of Unit
Y Turn Off welding power
source and disconnect input
power before following this
procedure.
Remove top cover.
1
Front Panel
2
Circuit Card Cover
3
Control Board PC1
Locate and remove circuit card
cover mounted on upper right in-
side of front panel. PC1 is mounted
on inside of control panel where cir-
cuit card cover was removed.
4
Receptacle RC4
PC1 arrives from the factory with a
synchronized AC arc (0°) plug.
.
With 60 Hz input power, the
output of this unit is 10 Hz. With
50 Hz input, the output is 8.33
Hz.
To operate the unit with AC arcs that
have a variable balance shift, dis-
connect the synchronized AC arc
(0°) plug and connect the appropri-
ate supplied variable balance plug.
To resume operation with synchro-
nized AC arcs, disconnect the vari-
able balance plug and connect the
synchronized AC arc (0°) plug.
Plugs are labeled accordingly.
.
Always keep disconnected
plug for future use.
Reinstall circuit card cover and top
cover.
4
Tools Needed:
3/8 in
Ref. SD-801 982-A
OM-2221 Page 27