Poor eMate needs fixing

[mmu_man]

I acquired a second eMate recently, and this one needs a bit more work than the previous one… First, it needs a good clean and has some rust in places…



I'll handle that later, first I had to fix that burnt zener diode that shorts the power input. Likely a protection diode (12V when the input is 7.5V), which served its office when some misinformed user send more than 12V into it.



The one I replaced it with probably can dissipate less but well… At least the short is gone. The power LED lights up green then orange, so there's some life.



More tomorrow.

 

[chuma]

That zener diode really took one for the team. How are the hinges?

 

[mmu_man]

That zener diode really took one for the team. How are the hinges?

Like new from factory, but I'll need to fix that

 

[mmu_man]

I got distracted because… because people

Today I cleaned up the bottom case on Dave's stream:

Still needs a lot of work, but I made sure it's working. Just the touch screen doesn't yet, but the screen ribbon needs more cleaning due to spillage.

 

[mmu_man]

Let's work on that some more on a live stream:

Working on another eMate

I got a second eMate, which has some corrosion and a burnt zener diode. Let's work on that some more.

youtube.com

 

[mmu_man]

So, one spring broke after I added the washer. I suppose that washer was a bit too large and so didn't push the spring inside the cavity properly… Or maybe it just needed more grease… I added a smaller washer under that one for good measure.

 

[mmu_man]

I got the touch screen working on today's stream:

- YouTube

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I torn down the keyboard to clean it up, it's drying now:

 

[mmu_man]

Let's reassemble the keyboard on that #eMate !

Even more work on the other eMate

Let's reassemble the keyboard on that second eMate.--Find me on: https://mmu-labs.org/Support me:https://ko-fi.com/mmu_manhttps://en.liberapay.com/mmu_man/

youtube.com

 

[mmu_man]

Turns out there's a cut trace on the membrane. I tried conductive ink but it didn't work, I'll see tomorrow if it just needed to dry out.

 

[mmu_man]

If you want to see if the keyboard got fixed:

- YouTube

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[mmu_man]

So yeah, the conductive ink got somewhat conductive (about 400 ohms, which I find a bit high but well), and it worked.

 

[chuma]

Re: the hinge repair, hopefully you came across it but the best guide to restoring the hinges is https://inventors-emporium.co.uk/pages/newton-emate-hinge.html

TL;DR recommended washer is 10mm diameter with a 3.4mm hole, with a crease added so that it holds right against the spring legs. Sounds like you got there eventually by adding a smaller washer underneath the larger one.

 

[mmu_man]

Re: the hinge repair, hopefully you came across it but the best guide to restoring the hinges is https://inventors-emporium.co.uk/pages/newton-emate-hinge.html

I saw the page the other day, hadn't had the time to read it.

TL;DR recommended washer is 10mm diameter with a 3.4mm hole, with a crease added so that it holds right against the spring legs. Sounds like you got there eventually by adding a smaller washer underneath the larger one.

Yeah, either should work.

Btw, I recapped C93 the other day, so it's in shape to resell it, as I only really need one.