Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
- MikeB
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Is that a hole burnt in the chip?
Mike.
Mike.
erskyTx/er9x developer
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Looks like you're right. Seems like a small hole....MikeB wrote:Is that a hole burnt in the chip?
Mike.
- MikeB
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
I'm fairly certain that chip is the switch mode, voltage regulator. If that is 'broken' it is also possible other components have been damaged by an incorrect voltage supply. That regulator provides 5V, and there is then a linear regulator to provide 3.3V, so you might find the important chips are OK.
The 5V is present on the SPort connections. Measure the voltage between the + and - signals on this to see if it is 5V (+/- 0.25V).
Mike.
The 5V is present on the SPort connections. Measure the voltage between the + and - signals on this to see if it is 5V (+/- 0.25V).
Mike.
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
The difficult we do immediately,
The impossible takes a little longer!
Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Sorry, Mike. I did not get where I have to measure voltage. Can you show where on picture please.
- MikeB
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
On the back of the XJT are some pin headers, one row of 4 and another of three. Right at the bottom of the case is a diagram showing the connections to them. The three on the right are the SPort connections, labelled -, + and S.
Please measure between the - and + pins when the XJT is powered. Take care not to short them together.
Mike.
Please measure between the - and + pins when the XJT is powered. Take care not to short them together.
Mike.
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
The difficult we do immediately,
The impossible takes a little longer!
Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
I've measured the voltage. And I have 8.2-8.4V there...MikeB wrote:On the back of the XJT are some pin headers, one row of 4 and another of three. Right at the bottom of the case is a diagram showing the connections to them. The three on the right are the SPort connections, labelled -, + and S.
Please measure between the - and + pins when the XJT is powered. Take care not to short them together.
Mike.
- MikeB
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
OK, that means the chip with the hole in is not working, you are getting something like battery voltage not 5V.
The only fix is to replace the chip (at least, assuming there are no other problems), although I'm not sure at the moment exactly what the chip is. I don't have the circuit diagram for the XJT.
Mike.
The only fix is to replace the chip (at least, assuming there are no other problems), although I'm not sure at the moment exactly what the chip is. I don't have the circuit diagram for the XJT.
Mike.
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
The difficult we do immediately,
The impossible takes a little longer!
Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
MikeB wrote:OK, that means the chip with the hole in is not working, you are getting something like battery voltage not 5V.
The only fix is to replace the chip (at least, assuming there are no other problems), although I'm not sure at the moment exactly what the chip is. I don't have the circuit diagram for the XJT.
Mike.
Thats is exactly what I was afraid.
If you'll find out what king of chip is it-let me know please..
Thank you for you help.
Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Should be a TPS5401.
Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Ordered one.Kilrah wrote:Should be a TPS5401.
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Re: Turnigy 9xr Pro + FrSky XJT + D4R-II won't bind
Did you ever get this working. Interesting thread.