Vectrix charger EVPS CPU childboard rework

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R
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Joined: 06/18/2009
Points: 1753

I've just come across an old EVPS gold Charger (runke). It does not have CPU version (usually V21 or V30): It means the CPU board is very old. Easy to recognize, due to soldered chipset on both sides. It cannot take newest firmwares, so it needs to be replaced.

newer CPU version V21:
1-typical serial.jpg
useless old CPU version:
2-old serial.jpg
Old cpu has chipset on both sides:
3-invalid cpu.jpg
correct CPU has chipset only on one side:
WhatsApp Image 2016-11-02 at 3.48.57 PM.jpeg

New CPU comes with extra wire that needs to be soldered directly on the Canbus connector.
WhatsApp Image 2016-11-03 at 11.31.38 PM.jpeg
4-valid CPU.jpg
using a charger as sample, I've located the correct place to solder that wire:
5-correct place.jpg
6-correct place.jpg
The upper floor pin needs to be cut. the wire is soldered on the middle pin floor:
IMG-20161104-WA0027.jpg
Time to close and test with new firmware
IMG-20161105-WA0000.jpg

OMG It works perfectly!
recovered_0.jpg

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framuga
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Joined: 10/23/2013
Points: 65
Re: Vectrix charger EVPS CPU childboard rework

Another tutorial and fantastic work. Congratulations

R
R's picture
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Joined: 06/18/2009
Points: 1753
Re: Vectrix charger EVPS CPU childboard rework

*Edit*
The B5 pin enables MC dc-dc to wake up scooter when it is plugged in.
The B5 pin is originally linked to noisy component that accidentally works as antenna, and sends this noise to CAN system trough electronics components wired to this component.
The wire rework purpose is bypass that antenna to clear noise inside the charger's CAN system.

Here a diagram and clear picture of the B5 pin
IMAG1163.jpg
WhatsApp Image 2016-12-10 at 10.22.03 PM.jpeg
WhatsApp Image 2016-12-10 at 9.45.08 PM.jpeg

Very important!
The Runke have large capacitors. Always use ICL to connect the charger, or you risk to damage MC and charger.
I've build an ICL adapter to plug in the DC charger's port.
IMG_20161115_152054.jpg

An old Voltmeter shows how voltage decreases to 0 volts:
IMG_20161115_152018.jpg
IMG_20161115_152024.jpg
IMG_20161115_152043.jpg
0 volts = capacitors full = no risk of damage due to sparks. Time to plug in the DC port of the charger!

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