Why won't my receiver power on?

Multicopter Forum
1

I’m having trouble with my receiver not powering on. I’ve checked a few things but still can’t figure out what’s wrong. Any ideas?

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2

Check if the polarity of the servo wire is correct. It’s easy to accidentally reverse it.

3

Does your ESC have a BEC to provide 5V output? A lot of multirotor ESCs don’t, and usually, the flight controller powers the receiver instead.

4

Shannon said:
Does your ESC have a BEC to provide 5V output? A lot of multirotor ESCs don’t, and usually, the flight controller powers the receiver instead.

I see some text on it that seems to say BEC, so maybe it does.

5

Try powering it using only channel 1. It should be 5V.

6

Cary said:
Try powering it using only channel 1. It should be 5V.

Actually, the power and ground pins are shared across all channels—they’re in parallel. It doesn’t matter which channel you use to plug it in.

7

@Blair
That’s not been my experience. I’ve tried that setup, and it didn’t work for me. Have you tested it and had it work?

8

Cary said:
@Blair
That’s not been my experience. I’ve tried that setup, and it didn’t work for me. Have you tested it and had it work?

Yes, I don’t use FlySky equipment anymore, but I’m almost certain all the power pins are connected in parallel.

For fixed-wing models, I always used CH3 for the ESC, and it powered the receiver just fine.

You might want to check your BEC output with a voltmeter to confirm the voltage.

9

@Blair
Alright, but in my latest build, the receiver only powered on when connected to channel 1.

10

Cary said:
@Blair
Alright, but in my latest build, the receiver only powered on when connected to channel 1.

That’s not true. I have the same receiver, and I’m powering it through channel 3. The ground and 5V pins are parallel, so the channel doesn’t matter.

11

@Zane
Okay.