g3m20211-1592-16 24V controller....

[BoomerChomsi]

Hi all,

I have bought a used e-bike for temporally use.
While servicing the bike e.g. inspecting the controller I see two resistors are overheated. But I really don't know what function(s) these resistors have.
Maybe you could help....

Thanks 8)

 

[Dauntless]

Ever heard of 'The Capacitor Plague?' I think I see where junk leaked onto your board, one sign there could be such a problem, though I thought it was supposed to be all high voltage/radiation capacitors having the problem. Haven't heard of ebikes being affected, but then maybe there weren't enough then to create the discussion. Obviously the controller is still working if you're just looking it over. When these things fail altogether there's spectacular visuals.

You might remember there was maybe a decade of not very old big screen TV's put at the curb and people saying they fixed one for $10. There's the problem I'm talking about. Most famous problem was all the computers that would freeze, reboot suddenly, etc. Dell paid a $300 million plus class action suit. Just a guess, can't really see in the pic. But I'd say figure out a model number for any of those cans you think might have a problem and you could discover 'Yep, that's a capacitor.'

Or maybe a replacement is cheap. That Clean Republic Sprinter 10K Samsung Li-ion battery pack is supposed to be airline friendly.

http://endless-sphere.com/forums/viewtopic.php?f=3&t=22444

 

[d8veh]

The big burnt resistor provides the power for everything except the motor. The battery voltage is cut down by it for the 12v regulator. The 12v from the regulator is split. One side switches the MOSFETs and the other side powers the 5v regulator. The 5v regulator gives the 5v that powers the CPU and all the sensors like PAS brake switches and throttle. It's fairly normal for that resisistor to get hot, especially if you overvolt the controller. It can also get hot if you have a short on the 5v anywhere, like if you get water in your throttle.

 

[BoomerChomsi]

Thanks for help all!

Yup controller is still working, untill I have touched the burnt resistor.
It just fell off of the pcb .

It is a +/- 51 ohm and the little one (33 ohm) nearby is also burnt.

I will replace these two, see what happen.
Thank you!

 

[Instagib2015]

Resistor what a +/- 51 ohm is that 51 ohm is that 1/4 w ? And 33 ohm what watt are they any link I got the same problem please help or any links to those resistors were to get them

 

[tmic]

How many ohms does the R64 resistor marked in the photo have ?