48A crystallyte controller no Juicy?

[potatonet]

Hello!

As the title states I have one of those beautiful 12 mosfet controllers from ages ago.. a 48A 36-72V controller

I recently repinned the hall sensor on it, though I cannot get it to run with the sensors plugged in or even in sensorless mode.

10 Kohms between all phases and ground except yellow phase (7.74kOhm) (see below), infinite resistance between positive and all phases.

I reviewed the instruction on the ebikes.ca site for mosfet checks though I imagine that they changed from generation to generation?

attempted electron transfer with 3 pin throttle no juice...

Thought it was a maybe a 4 pin throttle, fried a 36v throttle on 48V pack earlier so I figured with the smell of burnt electronics on my hands that it would be best to ask the Oracle that is the endless-Sphere

 

[potatonet]

I have had phase wires out of alignment before, I understand what the wheel shudder indicates.

I don't even get shudder, I get nothing out of throttle like the phases aren't even connected to the controller or throttle wiring, which is why I figured it was maybe a 4 pin throttle. wire color checks out between crystalyte controllers for green black and red upon further examination.

I dont get phase binding when I spin the motor, it spins freely.

I have a cycle analyst 2.3 that I am using with this controller, I have the original V1 cycle analyst, am unsure if this controller needs the CA plugged in to operate???

attempted with alternate CA (power lights and battery lights only) - still no juice

I feel like this is a FET issue as I get no fire whatsoever, no understanding of what the fets are supposed to read when phases run to ground/positive.

if anyone has a resource to wiring checks on this controller or has any information regarding the exact model numbers so that I can find more information online. I have contacted Grin, no reply.

Understanding that it is Old technology I feel like it should still work. Any Assistance is greatly appreciated.

 

[potatonet]

So I decided to remove the board and measure the phases with the board visible, green and blue cane back at ~10k ohms

Yellow came back at 7.74 kohms to ground

So I decided to mount up some 4110s to the board

Then I realized I have 744p 4110 mosfets and the package on the board is 823P

Measured the chips I installed again and got 7.74 kohms

Something isn’t adding up here...

It’s a 12 fet 4110 controller, cannot seem to figure out why yellow phase is coming back at 7.74

Will take disassembled controller and test fire it...

Just don’t want to throw these controllers away

 

[potatonet]

Test fire yielded no change post mosfet change over