Eeprom issue while trim

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Kilo
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Eeprom issue while trim

Post by Kilo »

Hey guys...

I had some Problems with the original FW.
On the main Screen, everytime I use the Aileron trim Buttons, I get an eeprom error and the TX shut down...
Then I flashed the Er9x and I'm very happy... But today, same Problem: I click the trim Buttons for aileron and then the TX is blinking and beeping very crazy...
The only Hardware things I've done was: Backlight, Trainer port Mod, Switch for turning on the BL and a Switch for turning on the beeper...

Well, with the new Firmware the Problem is still there... can't believe it!

Greetings
KILO

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Kilrah
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Re: Eeprom issue while trim

Post by Kilrah »

Well known hardware design error on the 9x.
viewtopic.php?f=45&t=7129&p=98262
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MikeB
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Re: Eeprom issue while trim

Post by MikeB »

Just the aileron trim buttons, and BOTH of them? The rudder trim works correctly?

Mike.
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
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Kilo
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Re: Eeprom issue while trim

Post by Kilo »

Hey, many thanks!!!
Oh... it's a known issue I see... :lol:
puh.. but when I look at the fix mods I have to think about it twice if it's worth to do it.
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KAL
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Re: Eeprom issue while trim

Post by KAL »

Have you seen this post?
If you are familiar with soldering iron and xacto knife then this mod should be no big problem.
And it's worth the effort 'cause a reboot during flight is NOT a 'must have'!

Klaus
( TH9X / 9XTreme / FrSky DHT / Spektrum / Multi / RotEnc )
( 9XR PRO / erSKY9x  / FrSky DHT / Spektrum / Multi / RotEnc / P3 as Slider )

Daedalus66
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Eeprom issue while trim

Post by Daedalus66 »

Can the problem occur in a 9x fitted with an upgrade board such as 9Xtreme or AR9x?
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MikeB
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Re: Eeprom issue while trim

Post by MikeB »

The trims all go to the 9Xtreme. The original trim inputs are available for switch upgrade purposes. At worst these might cause the original board to reboot, but the 9Xtreme will continue controlling the model while this happens.
The AR9X board, like the original SKY board operates at 3.3V, and the analog ground does NOT go through an inductor. These mean the trim switches don't cause the same problem.

Mike.
erskyTx/er9x developer
The difficult we do immediately,
The impossible takes a little longer!
flybabo
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Re: Eeprom issue while trim

Post by flybabo »

Relocating the analog ground to the digital ground will help.
Soldering out 0.1uF caps on low-resistance switch/trim/button input pins will eliminate the source of the problem.
viewtopic.php?f=99&p=108507#p105985
After removing them, I have never had problem no matter how fast I'm clicking on my 9XR board.
I'm expecting the same for the 9x boards.
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Kilo
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Re: Eeprom issue while trim

Post by Kilo »

KAL wrote:Have you seen this post?
If you are familiar with soldering iron and xacto knife then this mod should be no big problem.
And it's worth the effort 'cause a reboot during flight is NOT a 'must have'!

Klaus
yeah.. you're right! ;)
I have to think about it!

Thanks a lot for the informations!!!

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