bk 9920 problem... help needed before returning product...

do you think that i have to re-sold all my wires??? sorry but i sold since 3 years now, and I should not do bad solders i think :) ok i will have a look...
But before I need to try with another rx, the stock one, and my stock rx...
perhaps it's just due to the rx/tx system... All the posts I found about this kind of problems were writen by people that had this kind of control system, specificaly XS6, and other JR radio systems... I found a few posts about my problem, but no solution to solve it... never... :(

[neweuser]

i also run the JR radio, works fine now....

arghhhhh!!! i will become completly mad!!!!! 280$ for a so bad solution!!!
I will sell back my motor and controler, to buy a good HV Maxx...i think...

[neweuser]

I wouldn't do that. I had an HVMaxx, yes it's easy, yes it fits nice, but patience with the new system made me more happy!! I love my 9920 and 10XL. There has got to be a bad connection somehwere dude. What are your batt packs like? Are they stick packs by any chance?
After reading back, there seems to me like it may be your receiver? what reciever are you running...are you running a shifter servo?

no shifter servo, i run the g maxx one gear setup...
rx is the one that came with my xs6 race radio transmitter, from graupner...

[neweuser]

Is the red jumper plugged in all the way and making a good connection? Have your tried tuning down your steering trim? I would PM Mike and see what he says, he can also look at it for you. Has your shrink wrap on the bottom ok? you don't have it shorting out on anything do you? It would be well worth to find the problem

[coolhandcountry]

Are you sure the plug going in the rx is all the way in. I had this problem with the bk esc. It goes in and hits but the plug has little edges that catch and hold it from making good contact.

i shortened the battery wires of the controler, because the instructions say that i have to be careful about the wire length... less than 10cm between controler and batteries...
I have all the material to replace these wires, do you think that it could be the cause of this pb?

for the rx plug, it seems to be well plugged... and moving in the rx it doesn't resolve the problem...


please let me more time to try all the solutions that you provided before... i will take some days to work at this, all thanks for ur help guys! I've some axles for my researches... :018:

okay guys, i've discovered sthg... in fact i can program and run perfectly with the BEC enable, that mean that I can't use my rx pack... I never tried to do this because specs said that i had to use a rx pack with 2x7cells...
It was a little satisfaction... but now i would like to run my sterring servo in 6V!!!
After that I tried to plug the black jumper on the controler, and in this config I can run my servo at 6V!!!
But please can you confirm that there no risk to run the rx pack, plus the black jumper plugged onto the controler??? if it's ok for you all i will try to run these settings...

ps: i tried to do the programming procedure with my stock tq3 rx and tx, it doesn't work at all...

[neweuser]

That's weird. To enable the bec, i think you need to plug the black jumper in? So it works with this? If you have the bec (black jumper in) enabled, you should not run an rx pack. Or, try to plug the black jumper in, cut the red wire going to your rx, make sure when you do this that the red wire does not touch anything.

i tried to unplug the black jumper with red wire plugged and rx pack also plugged ... it doesn't work until I plug back the black jumper...
But I don't want to let the red wire plugged on my rx, too dangerous...

[sjcrss]

Try this....with the black jumper in....pull the red wire out of the center of the plug that goes to the receiver...( it controls the bec)...tape it back to teh rest of the wire...make sure it is covered good, now try to run the rec. pack....

yes let me the time, i will sleep some hours and try before going to work...
i think that's a good way to force the controller... tks! :)

SJCRSS, I tried to do it, it works until i unplug the black jumper... after that it doesn't work anymore... what is strange is that i have my servo at 6V with the rx pack + black jumper plugged ang red wire unplugged... i don't want to kill my controler, therefore i wait for an answer from BKelectronics...
The only possibility that i have today is to run w/o the bec enabled (red wire cut), but with a rx pack and black jumper plugged... It's the only setting that work...

Hello,
I just have received an e-mail from BKelectronics, they say that I can run a rx pack with black jumper plugged, without problem up to 12cells. It doesn't help me, I only have 7cells packs!!! :(