Theory Of Operation; Input Section - Lincoln Electric LN-25x Service Manual

LINCOLN ELECTRIC LN-25x™ Service Manual

Theory of Operation

Figure E.1 – Input section

Input Section

The LN-25x is an across-the-arc wire feeder that is equipped with CrossLinc™ technology. The DC input is
applied to the LN-25x wire feeder from the power source via the electrode cable and the work sensing clip
lead. This input voltage is applied to a bridge rectifier (D1) and also to the user interface board and the
flexible power supply board. The output of the bridge rectifier voltage is connected to and processed at the
user interface board and the flexible power supply board.
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