When I sent the DX9 board to NorthridgeFix for repair, I knew it was a long shot. The DX9 can reload its operating system from an SD card. I have the SD card. The board seems to have two microcontrollers, primary and audio, and an eeprom. I replaced the audio microcontroller and the eeprom, both of which were pooched. I was hoping that the SD read software would be in the primary microcontroller's firmware, which I did not replace, rather than in the eeprom. I just got the board back and I was wrong. The primary's bootloader can't read the SD card by itself. It keeps cycling trying to read the eeprom for how to read the SD card. I was afraid of that. Meh. I've still got another DX9 in perfect condition, and all my new models are on my Taranis X9D anyway, so no big deal. I knew it was a long shot, and I told NorthridgeFix so. Now I've got a DX9 for spares. That'll do. NorthridgeFix did an excellent job replacing the chips exactly as I requested. For that I thank them. Well done.
STM32 is a microcontroller, after replacing it, you must reflash its firmware. Also there could be some configurations and saved data on the SPI flash memory (the 8 pins chip) which should be written back
@@taaviplaan I am sure Alex knows, but in the end you have to do what the customer asked for. As an embedded system designer it happens all the time in my job, we gave advice to customers but they insist to do whatever they want. Then it is upon them if something gone wrong
Hey thank you so much for not beating up the customer who was just trying to save some money by doing it himself, most others would call him bad names and bash them into the ground, like you said, at-least he fessed up to his mistakes.
The STM32 requires a bootloader. A bootloader is required to load firmware to the device. Simply replacing the chips will not result in a working device unless they have been programmed. Hopefully the customer knows how to flash the bootloader to the device and has access to the required pins through a header of some sort.
The STM32 probably has the STM32 default bootloader, which should enable flashing of a Spektrum bootloader followed by a flash of the Spektrum operating system. At least, that is how it generally works. There are STM32 flashing programs available to flash it. You would just need the firmware files. Installing Zadig might be required to be able to talk to the STM32 chip, that is when there is a USB connection available... If not, flashing through JTAG is probably required.
Put that on a tshirt “ Northridge Fix. The SOLID test “ I’d definitely buy one from Melbourne, Australia. It’s definitely something I learnt from you Alex. Thank you bro, for the knowledge you teach us!
"Press and hold... Press and hold... wife calls, do not answer... Robber comes in to rob you... press and hold... aaaannddd now you may chase the robber and call your wife back." That made me laugh. One of the reasons I love your videos, serious but has some well done and placed humor.
Good video, subbed. I have a dx6e but it turns on automatically when the battery is fully charged around 8.2 volts. Is my transmitter worth fixing? Thanks William
Why would anybody other than the BVLOS boys want ELRS? In many countries operating UAV's BVLOS is illegal. Spektrum is still releasing current Tx/Rx combos so not so 'old tech'
"What's that gooey stuff". As an electronics repair tech myself, I find it very disturbing how some people out there attempt electronics repairs without the basic knowledge of solder, flux, and electricity. I used to repair TV's, and I still remember when a customer brought me a tv after a failed repair attempt by his neighbour. When I opened the tv and examined the power board, the electrolyte capacitors were replaced backwards and luckily the two legs of capacitors were soldered together which prevented them from exploding. Wow. Btw, I very much enjoy watching Alex's common sense approach to repairs.
that's bcoz he just wants that repair attempt fee , hes not interested in actual repair, his whole shop is based on taxi service system, get that initial pay
nice job. Quick question though, why did you remove the jingle from the end of the video lol. I'm so used to hearing it i was almost disappointed it didn't play this time lol
I always wondered some article claim fumes at 450°C -400°C start containing lead in them... Is this true??? How do you manage lead contamination from regular work.. Maybe a separate video on that would be awesome
Why dnt people pay attention he is doing what the customer ask him to do replacement of the 2 chips it would be different if Alex was troubleshooting and repairing the board then it would be something else Great job Alex keep making the great videos for your true followers 👍 👏
Awesome job as usual. Alex, it would be awesome for us (viewers) is somehow the customer gives you any feedback on wether or not the device started working again. Having results only would be less statisfying than seeing the device actually working but still more than nothing ;) Love watching your channel and your attitude. Keep up the good work
The customer seems to have used solder paste to make the soldering easier but did not fully melt and thus must've caused shorts in most of the chip's pins.
If "everything worked fine but the sound" then I would probably go straight to checking the speaker then work my way backwards through the preamp/amp/dac circuit that is driving it. These are low frequency audio signals, easy to check even with the cheapest $20 kit scope. Replacing micros and eeproms would be the last thing I would do as I don't know if I could even dump them or find the firmware/bootloader online. Not blaming Alex, he's just doing what he was asked. Some customers....
I hope the customer know what he is doing, that is a STM32 microcontroller and the other one is a SPI flash memory, without programing the board will still be brick, the funny part is that Alex knows how to read and write to SPI flash (Apple Mac bios) but the customer did specifically ask Alex to "only replace the ICs", hope he knows how to do it.
I always kept donor boards on my truck for in home repairs , When my company inventoried my truck they said I was over inventory and tossed them out , I told them I needed them for repair , they almost fired me for being over my inventory
Hi Alex. I wonder, in view of your extensive experience, you might be able to help me and a friend : we are unable to identify 2 ICs (comparable ?): AVBM .065 , A7UH .827 . Both are local buck or boost ICs , on device boards ( not power bank), mine is Mi Box Streamer. No info AT ALL online ! Thanks anyways !
Hope the customer is aware that programmable chips have to be of the same size otherwise he may need the information on the old chip I suggest you mail it back to him.
That's like a soap opera for some of us... you can't start a repair and not show if it worked or not! C'mon! I propose a weekly show with BigBoss sitting in an armchair, fireplace in the background, a monitor showing the case and reading letters with the ending... of course, the name will be "better than factory".
Looks like chip one was installed 90 deg out the dot should locate at the U identifier ?? EDIT I STAND Corrected I researched and I AM Wrong. It final layout was correct I jumped to conclusions without researching 😊
@@UnluckyOmenYT ...that´s a possibility but not an answer, if it was exposed to salt water, a lot of other things may be the reason; also the first repair attempt by the customer that finally "killed" the device
It looks to me like he might have used solder paste when replacing the chip and bridged some pins as a result. There's a reason I don't like using it for those type of ICs.
The STM32 is maybe already programmed, but does the flash memory need the data from the old memory to work or couldn´t you use existing data from a another device?
When I sent the DX9 board to NorthridgeFix for repair, I knew it was a long shot. The DX9 can reload its operating system from an SD card. I have the SD card. The board seems to have two microcontrollers, primary and audio, and an eeprom. I replaced the audio microcontroller and the eeprom, both of which were pooched. I was hoping that the SD read software would be in the primary microcontroller's firmware, which I did not replace, rather than in the eeprom. I just got the board back and I was wrong. The primary's bootloader can't read the SD card by itself. It keeps cycling trying to read the eeprom for how to read the SD card. I was afraid of that. Meh. I've still got another DX9 in perfect condition, and all my new models are on my Taranis X9D anyway, so no big deal. I knew it was a long shot, and I told NorthridgeFix so. Now I've got a DX9 for spares. That'll do. NorthridgeFix did an excellent job replacing the chips exactly as I requested. For that I thank them. Well done.
And here is the answer - but people are not really that interested in answers! ;)
You could try to dump the eeprom from the good board and write it to the fixed one
Thanks for sharing the outcome.
Why just get a updated nx10 or nx10se
Would be great to hear from the customer if the problem is fixed or not :)
Well the customer has to know how to program those 2 chips from now on. Not won yet.
Yes I would like a follow up from the customer.
Sheepishly replacing chips will not fix this.
STM32 is a microcontroller, after replacing it, you must reflash its firmware. Also there could be some configurations and saved data on the SPI flash memory (the 8 pins chip) which should be written back
Agreed, I don't think that DX9 is gonna work again.
next time pay attention to what customer said please
you're right about that. during the video I was hoping Alex would catch that but that was not what client requested.
Its not his problem, he did what he was asked to do
@@taaviplaan I am sure Alex knows, but in the end you have to do what the customer asked for. As an embedded system designer it happens all the time in my job, we gave advice to customers but they insist to do whatever they want. Then it is upon them if something gone wrong
Hey thank you so much for not beating up the customer who was just trying to save some money by doing it himself, most others would call him bad names and bash them into the ground, like you said, at-least he fessed up to his mistakes.
The STM32 requires a bootloader. A bootloader is required to load firmware to the device. Simply replacing the chips will not result in a working device unless they have been programmed. Hopefully the customer knows how to flash the bootloader to the device and has access to the required pins through a header of some sort.
It may have already been flashed
The STM32 probably has the STM32 default bootloader, which should enable flashing of a Spektrum bootloader followed by a flash of the Spektrum operating system. At least, that is how it generally works. There are STM32 flashing programs available to flash it. You would just need the firmware files. Installing Zadig might be required to be able to talk to the STM32 chip, that is when there is a USB connection available... If not, flashing through JTAG is probably required.
Sad that we didn't get to see if it works, Alex's smile of victory is the icing on the cake
Put that on a tshirt “ Northridge Fix. The SOLID test “ I’d definitely buy one from Melbourne, Australia. It’s definitely something I learnt from you Alex. Thank you bro, for the knowledge you teach us!
"Press and hold... Press and hold... wife calls, do not answer... Robber comes in to rob you... press and hold... aaaannddd now you may chase the robber and call your wife back." That made me laugh. One of the reasons I love your videos, serious but has some well done and placed humor.
( 11:38 )
I know you would do that
since the fourth pin on the IC #2 are slightly off by only 0.02mm....
such perfection....
😊✨❤️
Good video, subbed.
I have a dx6e but it turns on automatically when the battery is fully charged around 8.2 volts. Is my transmitter worth fixing?
Thanks William
Didn't expect to de a dx9 here. As somone who flies rc heli's I've used it a LOT.
Oh wow! Never thought I would see a RC radio on this channel :) Spektrum is the oooold tech these days. Here's hoping everyone swaps over to ELRS.
When we get decent fixed wing consumer receivers, and proper transmitter hardware that isn't aimed at FPV, that will undoubtedly happen.
@@big-smoke-rc it's not far off. There are already pwm elrs rx's.
Why would anybody other than the BVLOS boys want ELRS? In many countries operating UAV's BVLOS is illegal. Spektrum is still releasing current Tx/Rx combos so not so 'old tech'
We men of culture meet here again 🤣
@@justhackitfpv look into it. It's a lot more stable than spektrum and that means less failsafes...which means less broken models.
"What's that gooey stuff". As an electronics repair tech myself, I find it very disturbing how some people out there attempt electronics repairs without the basic knowledge of solder, flux, and electricity. I used to repair TV's, and I still remember when a customer brought me a tv after a failed repair attempt by his neighbour. When I opened the tv and examined the power board, the electrolyte capacitors were replaced backwards and luckily the two legs of capacitors were soldered together which prevented them from exploding. Wow.
Btw, I very much enjoy watching Alex's common sense approach to repairs.
@Northridge_fix. So you still haven't learnt anything from Alex then.
Surprised you didn't check for shorts to ground after replacing the chips
that's bcoz he just wants that repair attempt fee , hes not interested in actual repair, his whole shop is based on taxi service system, get that initial pay
Alex you are a pro, its nice to whats your vidios, greatings from the netherlands 👌
nice job. Quick question though, why did you remove the jingle from the end of the video lol. I'm so used to hearing it i was almost disappointed it didn't play this time lol
👍👍😘😘
3:20
That antiglair light works magic 👌🏽
Most interesting end part of the video is with the bigboss testing..the appliance..
Did it work in the end?
I always wondered some article claim fumes at 450°C -400°C start containing lead in them... Is this true??? How do you manage lead contamination from regular work.. Maybe a separate video on that would be awesome
Oh my god finally something I recognise! Wild
Why dnt people pay attention he is doing what the customer ask him to do replacement of the 2 chips it would be different if Alex was troubleshooting and repairing the board then it would be something else Great job Alex keep making the great videos for your true followers 👍 👏
what a comedian , lets you know I watch AND listen to your vids...lol
would be nice to find out from the customer if it did or did not work...
Awesome job as usual. Alex, it would be awesome for us (viewers) is somehow the customer gives you any feedback on wether or not the device started working again.
Having results only would be less statisfying than seeing the device actually working but still more than nothing ;)
Love watching your channel and your attitude.
Keep up the good work
Well said, I agree
Can we find out if it worked?
Did the board work again?, or is it still underway to the customer?
I need help, my dx9 doesn't even save a configuration, how can I resolve this situation, where can I find assistance?
8:40 It looks like pin number 3 and 5 is also not solid or the pad moves.
great video one off the best channels on youtube
The customer seems to have used solder paste to make the soldering easier but did not fully melt and thus must've caused shorts in most of the chip's pins.
Always enjoy seeing perfect work. No factory can replicate that perfection. Great work!
that's solid work there buckaroo
DX 8 guy myself, but yeah. I'm a fan of this.
Thank you Alex
I hope the customer gets back to him with the result, no matter what it is.
He did, it’s fuqed
Would want to know if the controller started to work.
Great clean work 😁
If "everything worked fine but the sound" then I would probably go straight to checking the speaker then work my way backwards through the preamp/amp/dac circuit that is driving it. These are low frequency audio signals, easy to check even with the cheapest $20 kit scope. Replacing micros and eeproms would be the last thing I would do as I don't know if I could even dump them or find the firmware/bootloader online. Not blaming Alex, he's just doing what he was asked. Some customers....
Maybe the customer already flashed the chip... nice job as usual
Alex Mate - I miss your ending music....
I hope the customer know what he is doing, that is a STM32 microcontroller and the other one is a SPI flash memory, without programing the board will still be brick, the funny part is that Alex knows how to read and write to SPI flash (Apple Mac bios) but the customer did specifically ask Alex to "only replace the ICs", hope he knows how to do it.
did it work?
Good job 👍
That first chip would need to have been sourced from Spektrum themselfs for the DX9 as it is a microcontroler with 64k of on chip firmware.
Good job Alex
God bless you alex 🌷🌷🌷
All advices are gold Except for the part (don't answer your wife's call) it's a big risque 😂
Awesome
Hello Alex, i've Notice in the video there a Chip named "NXD LPC1767FBD100" that has 2 holes in it, maybe that chip is the problem
I don't think it will work, its a STM32, you have to programm it before the transmitter will work again.
customer ordered just the replacement nothing else, pay attention to the start of the video
Could it be possible that the chip has already been programmed?
You can most likely reflash that chip over the USB interface of the transmitter
@@ansemik I did pay attention, but that does not change the outcome. As a professional, you should know what you are doing.
@@johnny4498 Maybe, most likely not.
Nice
I always kept donor boards on my truck for in home repairs , When my company inventoried my truck they said I was over inventory and tossed them out , I told them I needed them for repair , they almost fired me for being over my inventory
Isnt c35 lifted from one side..
Hi Alex. I wonder, in view of your extensive experience, you might be able to help me and a friend : we are unable to identify 2 ICs (comparable ?): AVBM .065 , A7UH .827 . Both are local buck or boost ICs , on device boards ( not power bank), mine is Mi Box Streamer. No info AT ALL online ! Thanks anyways !
Hope the customer is aware that programmable chips have to be of the same size otherwise he may need the information on the old chip I suggest you mail it back to him.
No checks for shorts that could be the reason that the chips were damaged? 🤔
Thanks for another video, did you end up buying a house for your family?
RC content! yes!:D
That's like a soap opera for some of us... you can't start a repair and not show if it worked or not! C'mon! I propose a weekly show with BigBoss sitting in an armchair, fireplace in the background, a monitor showing the case and reading letters with the ending... of course, the name will be "better than factory".
nice
Yes, if the robber comes in, don't call the Police...call your wife! lol
as everyone else says.. no point doing this without the data to reflash the STM32
Looks like chip one was installed 90 deg out the dot should locate at the U identifier ?? EDIT I STAND Corrected I researched and I AM Wrong. It final layout was correct I jumped to conclusions without researching 😊
Yeah, that chip will need flashing..
The second chip is literally flash memory.
How do you know?
...maybe it already is flashed.
@@SHINdanny Well the transmitter was non functional in the end so there's your answer.
@@UnluckyOmenYT ...that´s a possibility but not an answer, if it was exposed to salt water, a lot of other things may be the reason; also the first repair attempt by the customer that finally "killed" the device
Hopefully he knows how to reprogram the stm32 ic.
Nice 👍🏾
I see that your court case has a motion for dismissal. One less thing to worry about I suppose.
Came in for repair.
It looks to me like he might have used solder paste when replacing the chip and bridged some pins as a result. There's a reason I don't like using it for those type of ICs.
Awesome ✌🏻✌🏻✌🏻
8:43 probably chip leg number five(on this side) is moved (or it could be board is shaking, dunno)
pin 5 isn't "solid" at 8:40
nice danke
Bro you didn't program the bios chip
Great work. I hope customer know that he must put new firmware, if he ask you kann find a tutorial on TH-cam.
لن يعمل بطبيعة الحال القطعة الثانية يجب برمجتها بسوفتوير القطعة الاصلية هده ابروم
He should've told you to check other components on the board to. besides them 2 chips
25PX32VE is an SPI Flash, the data must be transferred from the old one to the new one
customer ordered just the replacement nothing else, pay attention to the start of the video
@@ansemik Yeah, I know, I just said it because it needs to be done in order to work. Alex done what customer told him to and I don't blame him
The STM32 is maybe already programmed, but does the flash memory need the data from the old memory to work or
couldn´t you use existing data from a another device?
I miss the music 🎶 😪
انتبه اليكس ... انا غيرت 25px31 وهاي ايبروم ... انتبه... اكيد في داتا والجديده ما فيها ولا اي داتا... وشكرا
Your soldering is fantastic but the device will not work because the memory chip is empty.
6::44 thats a microcontroller chip.. u need to program it also!.... which is certainly not possible
You can do it, with an Arduino IDE for example.
its a normal change and no read part
Will not working exactly, STM and eeprom from Ali is blank :) , only change and solder is not ALL ... :)
going to need firmware and a bootloader after the repair
Alexander the Great strikes again, great job mate.
To the customer. Please let us know if it works and who of all these people here arguing is correct. Thank you.
🙏👏👏👏🙏
yeah that will not work. STM32 is a microprocessor, without the code its a dead chip. nice repair work but sorry customer. its a dead board.
Ещё одно доказательство, что паяльная паста зло, если не использовать трафарет.
should of read the eeprom and wrote to new chip ....
it's can go to 9dimentions maybe!!!
First like and First comment perfect job as always keep it up 👍🏻👍🏻
Read old e prom posible write new it posible cool video😎😂😎😊
Nice try for a customer, he had it close.
Another way to fix a Spektrum transmitter is to buy a Radiomaster... lol lets see how much hate I get...
Yep, it's a nice job to get paid for soldering. But it's your time, which has to be paid for and it's what the customer wanted.
25PX32VE is not a microcontroler it is a seria