Why doesn't my MMM work anymore?

[Nard Cox]

Hi guys,

Recently I was jumping my RC8Te in my garden when the car suddenly stopped. It didn't do anything anymore but the magic white smoke was still inside. So I decided to check the switch and what do ya know, it failed on me. So after removing the switch it worked perfectly again. But just before I wanted to call it a day the car did.

I brought it inside and to my surprise I couldn't get the ESC to turn on anymore (tried different LiPo's, disconnected and connected all the cable but nothing worked). The switch cables were still solidly together and all the other cables seem to be fine as well. I tried the ESC in my Flux XL but no response there either.

I just hooked it up to my PC and it works flawlessly on there (first I loaded standard settings but that didn't help, after that I upgraded the firmware from 1.21 to 1.24 Beta but still no response). So I decided the check the inside for any damage or what ever but everythings looks perfectly fine.

Does anyone have the golden tip for me to get this thing running again??

Thanks!
Greeting from the noob.

[Pdelcast]

Originally Posted by Nard Cox

Hi guys,

Recently I was jumping my RC8Te in my garden when the car suddenly stopped. It didn't do anything anymore but the magic white smoke was still inside. So I decided to check the switch and what do ya know, it failed on me. So after removing the switch it worked perfectly again. But just before I wanted to call it a day the car did.

I brought it inside and to my surprise I couldn't get the ESC to turn on anymore (tried different LiPo's, disconnected and connected all the cable but nothing worked). The switch cables were still solidly together and all the other cables seem to be fine as well. I tried the ESC in my Flux XL but no response there either.

I just hooked it up to my PC and it works flawlessly on there (first I loaded standard settings but that didn't help, after that I upgraded the firmware from 1.21 to 1.24 Beta but still no response). So I decided the check the inside for any damage or what ever but everythings looks perfectly fine.

Does anyone have the golden tip for me to get this thing running again??

Thanks!
Greeting from the noob.

From your description, you may have cracked a part or a solder joint. Send it in, we'll get you fixed up.

Patrick

[Nard Cox]

Is there a way I could visually check that before sending it in ?

How long would it app take to check/fix it going from a cracked solder joint? Since I saw you guys were also planning on moving and all ;)

[Pdelcast]

Originally Posted by Nard Cox

Is there a way I could visually check that before sending it in ?

How long would it app take to check/fix it going from a cracked solder joint? Since I saw you guys were also planning on moving and all ;)

You don't have to worry about the move -- we are keeping our building that we are in now.

If you have a good quality microscope you can visually check it - -but you won't be able to see a cracked via (which is another possibility...)

-Patrick

[Nard Cox]

aka: no I can't check it myself

Well I'll be sending it in than. Will read the website concerning the procedure. Thanks Patrick!!

[Nard Cox]

Shit, I can't find the damned receipt anymore (I'm finding receipts of $2 items I purchased and stuff but not the MMM one, don't understand where it's gone to, if I ever had one).

How to proceed? Is there a way you can check if this thing is still under warrenty via a serialnumber of something similar? It's not modified except for the removal of the switch.

[TexasSP]

Do you buy it with a credit card? How about an online source? Most places keep copies of receipts these days so I would check those avenues first. If not don't worry, PDC/CC will take care of you. Patrick has always gone above and beyond.

[Nard Cox]

Nopes, I bought it from someone else. I believe he also gave me the receipt but starting to have questions about that now. Normally I'm freaky about those stuff and I always keep receipts and boxes and stuff... I will try to contact the seller, though I don't have high hopes from that (in his email response it seemed like had a screw loose).

[Pdelcast]

Originally Posted by Nard Cox

Nopes, I bought it from someone else. I believe he also gave me the receipt but starting to have questions about that now. Normally I'm freaky about those stuff and I always keep receipts and boxes and stuff... I will try to contact the seller, though I don't have high hopes from that (in his email response it seemed like had a screw loose).

There is a manufacturing date sticker on the circuit board, so we can at least check the date of manufacture for you.

Just state that you lost the receipt, and we'll check to be sure it's within a reasonable age.

Thanx!

Patrick

[Nard Cox]

Is it from 10-2008 :o ?? I bought it on 20-10-2009 and he said he had it for half a year. Either he was lying or is was lying in stock for a long long while.

[Pdelcast]

Originally Posted by Nard Cox

Is it from 10-2008 :o ?? I bought it on 20-10-2009 and he said he had it for half a year. Either he was lying or is was lying in stock for a long long while.

Yes, that is an October 2008 manufacture date.

[BrianG]

Kinda hard to see if anything looks obvious from the darkish picture, but things look ok except maybe the discoloring on the BEC coil, but that could be natural or just dirty. Maybe the BEC died? You can check that with a voltmeter.

[What's_nitro?]

Is it me, or is there a component missing right there???

[BrianG]

Yup, looks like there is a component missing. The only decent picture (pay no attention to the arrow/circles) I have of that area doesn't show the value though.

So, I guess your choices are:

- See if it will be warrantied

- If not, try to find a replacement component and solder it back on. At worst, it still won't work or you mess it up more. Either way, if it wasn't covered by warranty, you still have the $70 replacement plan cost, so might as well try to see what you can do.

[Arct1k]

Send it in with the $70 - its over the year... and looks like it was shock damage...

Can't afford for Castle to go bust.... :)