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HomeAircraftHelicopterAlignT-REX 700N › Spektrum AR7100R LED Help
12-28-2009 05:28 PM  8 years ago •• Post 1 ••
1VERTOL

rrApprentice

San Diego, CA

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Just finished installing and calibrating the receiver. The green LED comes on as advertised, but the red sensor LED stays illuminated the entire time even when I rotate the crankshaft. Do I have a bad sensor? It is brand new!

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12-28-2009 07:42 PM  8 years agoPost 2
opit

rrNovice

Oranmore,Co.Galway - IRELAND

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Move out your sensor from the back plate around 1-2mm. That should help

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12-28-2009 07:47 PM  8 years agoPost 3
1VERTOL

rrApprentice

San Diego, CA

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LED stays lit entire time regardless of sensor position. Spoke with Horizon. Rep said it is more than likely a faulty sensor and are sending another to replace it. Frustrating since this is brand new.

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12-28-2009 08:03 PM  8 years agoPost 4
HiroboFreak

rrVeteran

Central Coast, NSW, Australia

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The sensor doesn't usually pick up correctly until it sees a fast enough sweep.

Try turning the engine over with the starter while checking the LED.

As stated, if it's the YSSR, leave about a 3mm gap between the sensor & the backplate.
If you get a double blip on the LED, it's too close & the sensor is detecting the hole in the crank pin.

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12-29-2009 02:15 AM  8 years agoPost 5
1VERTOL

rrApprentice

San Diego, CA

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I may try and turn it over with a starter as recommended, thanks. Shouldn't the red led be off though upon power up then turn red upon detection? As mentioned before I was advised that it may be a bad sensor. Just wonder if anyone else has had thus issue???

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