DOWNLOAD Instructions for electronic LNB switch adapter used with Sky Digibox
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Using CS012 switch with non-Sky receiver
The LNB switch passes the feed through to terminal "A" unless a voltage is supplied on the thin black wire, in which case it passes the feed through terminal "B".
The black wire "sensing" input is very sensitive and may operate the switch with as little as a volt. Some receivers have a 0/12v output but this output never actually falls to zero volts, so the switch won't go off.
A simple fix for this receiver fault is to connect resistors as shown below.
Connect the black wire to a 1k resistor (brown-black-red) and connect the resistor to the 0/12V zero terminal or to the receiver chassis or to any F plug nut to ground it.
Also connect the black wire to a 4k7 resistor (yellow-purple-red) and connect that to the cathode (banded) end of a silicon diode (e.g. a 1N4148) and connect that to the 0/12V output of the receiver.