AMX Controller Replacement
- Before you start
- AMX CLASSIC
- AMX STEP
Before you start
This is a guide on how to replace your AMX Controller. Do not attempt this unless you've been advised to from Analog Motion.
- 2.5mm Hex Key
- 4mm Hex Key
- 19mm spanner
- A bike wheel spoke (or a tiny hook, of you don't have any you can modified a coat hanger to make one, see picture below)
The first thing you want to do is to remove the battery
If you don't have a bike stand you will need to place your bike upside down so it's much easier to work on. If you do so, make sure you rotate the display inward so you won't damage it.
Use a 2.5mm Hex Key to loosen the display clamp.
Then simply rotate it so it won't touch the ground when you place your bike upside down.
If you have an AMX CLASSIC follow below, if you have an AMX STEP, click here.
1. Getting all the cables out
The first step is to get all the cables out.
Start by disconnecting the motor cable
Using the spoke, start gently pulling out the cables one by one.
Here is the list of cables:
- Rear brake cable
- Motor cable
- Pedal sensor cable (flat cable)
- Rear light cable (the one with a spiral cable) and front light cable, which are both connected to the Light Controller
- Controller loom
Once you got everything out you can disconnect the controller loom connector, the pedal sensor cable and the light controller connector.
2. Remove the AMX Controller
Remove the battery.
Unscrew the two controller bolts with the 4mm hex key.
Gently pull out the controller upward, the rubber grommet will likely come out with the cable (it's ok you can place it back later).
You can then replace the controller, make sure you slide the grommet over the cables before you start threading them down the hole. Slide down the cables gently one by one, see picture below for cable identification.
Reconnect everything (you can just tuck in the accessory cable as it is not used on the AMX yet), test if it is working by inserting the battery and connecting the display. Then move onto the next step.
3. Tidy up
Gently tuck all the cables back inside the frame, start with the big ones (Controller, Light Controller, then Pedal Sensor cable, Motor and Rear Brake cable should go last.
See the picture below to see how it should looks like
Once you've put everything back in place you can re-connect your motor cable, make sure the arrows aligns and that the cable goes all the way to the line.
You're all done!
1. Getting the motor cable out
Start by untightening the two wheel bolts with a 19mm spanner
Using pliers or scissors, carefully cut the cable ties that hold the motor cable
Carefully disconnect the motor cable
You can now slide the rear wheel off and put it aside
If you have mudguards you will need to unbolt the lower mudguard bolt using a 4mm Hex Key
If you have a kickstand you will need to remove it using a 8 mm Hex Key
You can then free up the motor cable
2. Give the cables some slack
Give your front loom cable some slack, the loom cable is located in the front of the bike next to the handlebar
Once you found it, gently push it in into the downtube hole, you can do the same with the rear brake cable (you want to push them in by a few centimeters)
Once you've gave then enough slack, you should be able to get slack on the bottom of the downtube hole
3. Free-up the Controller
Unscrew the two controller bolts with the 4mm hex key. Put the bolts aside (don't loose them!)
You can gently and slowly start pulling out the controller, do not pull out completely, just enough to have a bit of cable slack
4. Getting the cables out
Using the spoke, start gently pulling out the cables one by one. Focus on the smaller cable, pedal sensor and light controller cable, see pics below for identification
Here is an overview of the cables and their names
You can then disconnect the pedal sensor and the light controller cable, once disconnected pull them out from the downtube top hole
It is easier to get the loom cable from the top hole, do it by gently pulling on the cable from the hole on top of the downtube.
Once it is out, disconnect it
You can also pull the motor cable out from the downtube top hole
You should have your controller out of the frame now. Make sure you mark your controller and put it aside, as you don't want to mix it up with the replacement one.
5. Quick test
Before you reconnect everything, you might want to perform a quick chekc to see if the controller is working, re-connect all the cables from outside the frame, place the rear wheel losely. Place the battery in, turn the display on and try to use the walk assist by pressing the minus button on the display (<), that should start the motor slowly. Try the pedal assist by turning the pedals and see if the speedometer works on your display. Turn the lights on and off. If all the functions are working you can move onto the next step.
6. Reconnecting the cables and placing them in the frame
Thread the motor cable throught the hole
Reconnect all the cables one by one and once re-connected push them back into the hole, start with the loom cable and move onto the smaller cables
6. Attaching the controller
Now that you've re-connected everything, put the grommit in place, you can use a small hex key to force it into the hole, there is a groove on the grommit so once you've pushed it in it will stay in place.
Place the two 4mm bolts back in place. You can now place back the wheel, re-connect the motor cable, (make sure you put new cable ties to hole the motor cable in place).