HakkoUSA Knowledge Base

Why does the S channel on my FM-203 read off?

Andy Chung

The S channel needs to be turned on. Hold the S button down for at least 2 seconds to turn it back on. The channel can be turned off by doing the same procedure.
Article ID: 11996
Last Modified: 10 Months Ago
Last Modified By: Andy Chung
Type: FAQ
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