[FIXED!] XJT beeping

Cant get your radio to work? General Hardware issues?
andrewju
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Joined: Tue Aug 21, 2012 7:29 am
Country: Russian Federation
Location: Moscow

Re: [FIXED!] XJT beeping

Post by andrewju » Thu Nov 16, 2017 10:34 pm

macslad, sorry, I saw your message just now. :(

I sent you a PM in case you're still looking for help.

Svenn13
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Re: XJT beeping

Post by Svenn13 » Wed Feb 07, 2018 6:17 pm

andrewju wrote:
Tue May 16, 2017 9:40 pm
Good news! I got my EEPROM chips today!
I'll post some pics to illustrate the process (just showing off my new USB "microscope", really... :) ).

So, this is the original EEPROM chip we're about to replace:
Image

A closer look:
Image
It's an M24C02-W, which is rated for 2.5 to 5.5V. FrSky told me the chip should be M24C02-R, which is 1.8 to 5.5V. In fact, I don't think it makes any difference, since MCU voltage is 3.3V and that's the voltage that should be feeding the EEPROM as well. Anyway, the new chip will follow FrSky's recommendation.

Here's the PCB with the chip removed:
Image


And this is the new chip sitting on its place:
Image


I switched it on, and ... no more annoying beeps! Everything works, the module is still talking to receivers, and telemetry is Ok, too.


Guess what! Last weekend another hobbyist came to me with exactly the same symptom on his XJT. The module beeps without any reason! Also, there's at least one YouTube video showing the same issue... So while it is not a widespread problem, it's not a unique case, either. I hope my experience will be of help to others.


BTW, I have plenty of these memory chips now. :)
PM me if you need help getting the parts or fixing your XJT.
Hi Andrew,

Got the same problem with my 2 XJT modules.
Can you help me getting the M24C02-R chips? Please send me a pm.
Thanks.

andrewju
Posts: 711
Joined: Tue Aug 21, 2012 7:29 am
Country: Russian Federation
Location: Moscow

Re: [FIXED!] XJT beeping

Post by andrewju » Fri Feb 09, 2018 7:30 pm

Responded to your PM...

batko32
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Country: Bulgaria
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Re: [FIXED!] XJT beeping

Post by batko32 » Tue Apr 10, 2018 7:57 pm

Hello everyone.
I have XJT with the same problem. I try to repair it for my friend. Replacing eeprom is easy for me. And should there be something written in his memory?
Thanks in advance.
I wish success to everyone

Toschi10
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Joined: Fri May 25, 2018 6:05 am
Country: -

Re: [FIXED!] XJT beeping

Post by Toschi10 » Fri May 25, 2018 3:45 pm

Hello, I have the same problem with my xjt module on flysky th9x.
I'd like to know if this rs 232 interface it's ok for connect the module with eepe software? https://m.banggood.com/FT232RL-FTDI-USB ... mds=search

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