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HomeRC & PowerAircraftHelicopterRadio - Futaba FASST › GY401 Query
12-08-2012 08:10 AM  5 years agoPost 1


Manchester, UK

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I have a number of 401's which suit my pocket, abilities, and they work well.

I've just finished sorting a second-hand Hirobo Lepton which I bought with Futaba servos and gyro. Upon setting up the LED is lit all the time? This I know from my other 401's not normal.

The only differnce is that I'm using a Spektrum RX which is controlled by a Spektrum module in my Futaba ZHP WCII.

On the bench the gyro does seem to work - the LED goes brighter or dimmer depending on whether it is rate or heading hold; rather than off / on / etc; and the servo centres or not.

Also the radio is powered via the BEC circuitry from the Castle Pheonix ESC.

Thoughts / comments anyone??

Many thanks

I'd Rather Be Flying!!

12-08-2012 08:22 AM  5 years agoPost 2


Cookeville, TN

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Try another gyro to verify the current gyros condition.


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12-08-2012 08:23 AM  5 years agoPost 3



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Solid light - it is in heading hold

No light - it is in rate mode.

Blinking light - not initialized properly

Note- the 401 MUST be initialized in HH mode to function properly.

If your 401 doesn't function like I wrote above, I would suspect it to be a Chinese counterfeit 401.

▲ ▲

12-08-2012 12:58 PM  5 years agoPost 4
Pistol Pete


Seffner, FL

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I have read that even the counterfeits have gold plated pins...ouch.

Remove GAIN wire and connect a servo instead to verify THAT channel/switch function.

~~Enjoying the hobby one flight at a time~~

12-16-2012 03:18 PM  5 years agoPost 5


Punta de Mata, Monagas-Venezuela

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Bad gyro... Don't fly with it!


Saludos cordiales,

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