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Detuning the electric garage door's existing receiver
Skip this section if your garage door opener has an external receiver or
if your garage door opener never had a remote control.
The garage door opener's original receiver must be disconnected or "detuned" to
make it impervious to "scanners." (Burglars use scanners to rapidly transmit one
garage door remote control code after another, often activating the garage door
opener in a matter of seconds. Unless you detune the existing receiver, your
garage door opener will still retain the original remote control code and will open
the door when a scanner transmits that code.) To detune a garage door receiver,
perform the following:
1. Unplug the garage door opener's power cord.
2. There are two types of receivers: external and built-in. If your opener uses an
external receiver, you should have already disconnected its terminals as part
of the installation procedure (page 1, step 2).
3. If your garage door opener does not have an external receiver, you must
detune its built-in receiver. Near the garage door opener's antenna wire, you
will find its tuning device(s). You may need to remove the opener's outer
housing in order to access the circuit board.
4. Most receivers use "tuning slugs." It may be necessary to poke through a
decal in order to gain access to the tuning slug holes (as illustrated in
diagram 2).
On some openers, the tuning slugs may be located on the exposed printed
circuit board (diagram 3).
Use the supplied tool to turn the inner core counterclockwise until it can
be removed (diagram 4).
If the receiver uses a "tuning capacitor," use a screwdriver to turn the
screw 1/4-turn in either direction (diagram 5).
On a Genie "Genius" type opener, peel back the label on the circuit board
and rotate the screw a quarter-turn in either direction (diagram 6).
5. Reconnect power to the garage door opener and activate the original remote
control. The opener should NOT respond. Repeat steps 1-5 for garage
door/gate openers #2 and #3, if applicable.
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