Error code 239 EF

It may happen that during the use of the 7701M in the CADR program the error "Error code 239 EF" appears. This error is related to the sticking of the magneto-optical head.

The fact is that the silicone on the new device "sweats" and can hold the magneto-optical head. This problem can be exacerbated by temperature, humidity, damp ink on banknotes, etc. However, the sticking effect usually decreases as the silicone surface becomes dusty and wears down.

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