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IMU issue

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Jan 6, 2019
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New to the drone world. Bought a secondhand Q500 4K from my brother. I flew it with him a couple months ago and it worked fine. I fired it up yesterday, and it would not connect to the ST-10. The main LED flashes red, 3x per sec. There is also a tone that it makes. I tried to bind everything together. I can get connection to the camera, but not the drone. I got all the GUI software download and hooked up today. The "Orientarion Sensor (IMU)"- accelerometer bias out of range. I tried to recalibrate the accelerometer and the calibration failed from timing out. Is there anything else I can try? Thank you.
 

WTFDproject

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[QUOTE The "Orientarion Sensor (IMU)"- accelerometer bias out of range. I tried to recalibrate the accelerometer and the calibration failed from timing out. Is there anything else I can try? [/QUOTE]

Unfortunately, the answer for most folks is pretty much "No". IF you are very good with micro soldering, then it can sometimes be fixed. The problem is either the IMU chip itself is bad, or the solder is cracked. These chips look like normal SMD chips when you look at them, but they don't have "legs". The contact points are cut off at the edge of the chip, making it a common solder failure.
Not sure about replacing the chip itself. I have had nearly 100% success when replacing the chip with a salvaged chip from another board. Have had zero success when replacing with a new chip. I'm not an electronics guy, but I suspect the chips have to be programmed before they will work.

First thing I would try would be to carefully re-melt the existing solder around the chip. Not likely to help, but it might.
Replacing the chip from a salvage board requires the use of a Hot Air rework station, and some experience.

The most reliable fix is to replace the entire mainboard, which requires some soldering skill, but within the range of the average
DIY person.

The chip is circled in white in this drawing:
Board Post.jpg
 
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Thank you for your reply. I'm not so confident in small electronics. I will look at it and see if there is anything visual. I appreciate the picture as well. Thanks again.
 

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