Question about Alert Driveway Patrol Infrared Wireless System
First check the power supply for each unit. A low battery or bad filter capacitor (AC power) can cause all sorts of misbehavior.
Do you have an infrared camera or other IR detection device available? (Sometimes you can improvise by removing the infrared filter from a Webcam.) Check to see if the IR emitter is working. Another possibility is that the sensor or emitter cover is dirty. Also, check whether there is something in the field of view that is causing the false alarm. Moving the sensor unit is one way to eliminate this possibility.
These are the "easy" preliminary checks. If you haven't found the problem with these tests, it's time to get out the instruments and check voltages and waveforms.
Posted on Oct 06, 2010
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Posted on Jan 02, 2017
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The grinder cover has a white pin as a part of the cover that acts as a go between for the plastic molded post on the cover and a contact switch in the unit. Without the cover in place the molded post is not long enough to reach the contact switch and "tell" the machine it's o.k. to brew. It will beep incesssantly and do nothing. Get a replacement cover, or jury rig something to act as a replacement for the grinder cover pin. You can manually push in the switch to get it to stop beeping, but it will spring back out as soon as you release it.
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