Sorensen DCS Series - Modification and Repair Thread

If it is helpful, I have a working Sorenson DCS 55-55 that I can check parts values, voltages, etc if you can tell me which ones to check.

(I also have some ancient linear Sorensons but their designs are unrelated to the DCS types).
 
Thanks for offering

I think once I actually put in the work to figure the calculations of that part of the circuit the answer will fall out.

That... Or an exact replacement DCS60-18E without the mod, then bruit force compare component by component.

I always feel fear/anxiety/avoidance about circuits like these. They are non-intuitive, seemingly impossible in my mind... Until I completely understand... Then CLICK - it feels super obvious.

Like that with all complicated things

* eBike controllers
* Solar all in one inverters
* Python programming language
* Bleeding hydraulic brakes
* Building stair cases
* Patching roofs

All start off feeling like mountains, then later feel like mole hills. If only it could be the other way around.

-methods
 
All start off feeling like mountains, then later feel like mole hills. If only it could be the other way around.

Sounds like the entire planet I'm still trying to find a way to land on, to get really going on my Snuggles-the-Wolf project sometime this decade:

I thought it was just a mountain, then discovered it was a series of ranges...then I found out I was still in orbit over the planet they were on....

I "know" what needs to be done, I just don't know how to do it and haven't figured out how to learn all the things to get to the starting point yet.
 
Replacement Fets
They are priced anywhere from $18-$28 each, claiming genuine. Out of China they are going for a couple bucks each in lots of 5pcs. All sorts of clones etc, so I just went for it on the first open-box-rando I could find.

8pcs for $6 open package + $4.20 shipping

They will either work or they wont, we will see. The markings are very different than those in my unit, the mosfets were BOSS in their time, time has moved on... so ... figuring Clones may be as good or better than the original shizzle.

... I WAS going to try and swap in some modern-package fets but that would make no sense. The later E-Series already does that and I could get a job, work 8hrs, and buy 8 for-parts units and be better off.

SO -> Rewinding Logic and packing the ol' girl with what very well may be counterfeit garbage.

-methods
 

Attachments

  • JenkemGarbage.png
    JenkemGarbage.png
    60.4 KB · Views: 2
Built a new bench on dirt floor, onward to DCS33-33M15 rebuild

Packing with the eBay mosfets

Fastening the Motherboard back in

Taking it to turn-on Test

Sweet!
Now it's producing output and banging off of OVP. PROBABLY SHOULD HAVE TURNED THAT DIAL ALL THE WAY DOWN...

-methods
 
DCS 40-25 Repair Thread
Good Guy to help!
 
Back
Top