Help! Controller not giving power to throttle

[neoplasticity]

I bought a 350 watt front geared hub hit from cellman about 18 months ago.

http://endless-sphere.com/forums/viewtopic.php?f=4&t=28355

today my motor just quit on me.

came home and my batteries are definitely good and my controller is getting power from the batteries.

using this

http://www.ebikes.ca/troubleshooting/ThrottleTesting.pdf

i've determined that my throttle is getting no power because when i check the leads, the voltage reads zero instead of 4 or 5 volts like it should

using this

http://www.ebikes.ca/troubleshooting/BlownMosfets.pdf

i've determined that my mosfets are good.

does anyone have a guess as to why my throttle has no power?

is this something easy to fix? if i take to this an electronics repair shop, could they fix it? is there a replacement controller that i can get easily?

 

[amberwolf]

Does it have a hall sensor connector, or 3-pin ebrake wires? If so, check the 5V line on them. If they have 5V and throttle doesn't, it's a broken wire in the throttle cable somewhere. If they don't have 5V either, the regulator in the controller is probably toast, either the 7805 or 7812 higher up the chain, or whatever is used in yours.

 

[dnmun]

his controller may not be getting power, so no voltage to the regulator to begin with therefore no 5V.

 

[neoplasticity]

ok, i just check the brake wires and the hall sensor and nothing has power.

i know for the fact that the batteries are good and they connection to the controller is good.

so the controller is getting power from the batteries but after that it seems like none of the other leads have any power at all.

i opened the thing up and i didn't see any burned out components and nothing smelled like it was burned...

frustrating...

 

[neoplasticity]

is there some way to check if the regulator is getting power?

 

[dnmun]

measure the voltage at the input power resistor. then you will know if the controller is getting power.

 

[amberwolf]

so the controller is getting power from the batteries but after that it seems like none of the other leads have any power at all.

i opened the thing up and i didn't see any burned out components and nothing smelled like it was burned...

And what voltages do you get at various points while it's open?

You said teh controller was getting power--where are you measuring that?

 

[neoplasticity]

i'm a total noob. i didn't even measure while it was open because with that many amps running through there i was afraid to short something and melt it. i don't even know what the input resistor looks like.. if i took a picture and uploaded it, could you guys tell me?

 

[dnmun]

or you can read the thousands and thousands of threads where people have their controller open and discuss the components inside.

you should be able to follow the red wire for the circuit current to the spot on the pcb where it is attached. measure Vcc there.

 

[neoplasticity]

I fixed it!

after taking it apart and testing every resistor inside it and finding nothing wrong, i hooked up the battery to it and noticed that my positive wire where it hooks up to the battery splits very early and by the time it gets to the controller, there are two positives and one ground. the positive that was feeding the 5V part of the controller is a very thin wire and it had broken in the cable which i discovered after finding that the big wire was feeding power but the little wire wasn't.

so the controller was fine and the wire in the power cable had broken.

i read this thread
http://endless-sphere.com/forums/viewtopic.php?f=2&t=46888&p=688224&hilit=controller#p688224

and this thread

http://endless-sphere.com/forums/viewtopic.php?f=2&t=10312&start=180

and didn't understand too much of what was being said so i'm glad it was something simple because i fear if it was something difficult, i'd be controllerless right now.

i appreciate the people who tried to help me though. thanks guys.