An accompanying fax said:
Back in the late 90s, Easybike used our controllers in their machines. Unfortunately the wiring went through several stages of modification and we simply do not have details of all of these. However, we have found a few notes, tucked away in our archives.
Because of this series of modifications, and because customers do not submit their wiring diagrams to us for approval, we cannot supply a suitably modified 1QD. We simply do not know what wiring or modifications any one machine will have. However the following notes may help you understand the wiring so you can effect the modification yourself.
Please note that modified controllers cannot be repaired under guarantee. You effect modifications at your own risk.
The controller used was a modified version of our 1QD-70-24
The diagram below was sent to EasyBike in early 1999.
An accompanying fax said:
In fact the modification does considerably simplify your wiring, as we expected.
The pot resistor: standard value is 27K: this needs to be reduced to 10K for a 5K pot.
This resistor is in series with the 'Switch etc', from the internal 24v rail. You could put a link in here and simply use the external plug-in resistor, but (unless you say otherwise) your spec for future orders states '10K'.
You now do not need the extra resistor on a flying lead!
However the notes we have say
Pot resistor linked out for BCM.
external 10K resistor for 5K Magura.
The circuit diagram is available.
As well as the notes above, the resistor (marked 10K) in series with the pot wiper has been changed occasionally - it scales the controller so that full speed is reached at full pot rotation and you may find a different value has been used.
