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Irken labs fried my De10Nano or what happened?

Kidkaos

Kidkaos

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Hello, I have been using both mistercade and irkens jammaexpander for a few months now without a hitch until now. My mistercade is working fine on all my cabs and just yesterday the irken labs started smoking upon firing it up. I immediately shut it off and decided to retry in a few minutes and decided to record it to see if I can tell where the smoke was coming from. Initially it appeared to be under the hdmi port, but after turning it on the 2nd time to record it appeared to be near the SD ram add on. I was wrong after inspecting it. Looks like the DC5V barrel side of the board fried some tiny resistors and Nano is dead now. The jamma expander seems to turn on BUT at this point I'm not willing to remove my mistercade Nano to see if it kills that one too. I'm waiting to hear back from Invizm. What do you guys think is going on?
I run my cabs at 5.00-5.001/10
And noticed it pulled 4.991 under load (I use the jnx volt meters on all my cabs)
My psus are all recapped and have 0 issues on mistercade or any other pcbs. Any and all help is appreciated.
Here is a video of the magic smoke.
View: https://youtu.be/lsPoOLWeeHE

And pictures of where the burnt traces/resistors are located under the 5dc barrel on the Nano.
 

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Hmmm. looks like the DE10 regulators, etc.. went south on that one. I think the Jamma expander only passes 5v from the cab to the DE10 without messing with it. @invzim should be able to answer better on this ofcourse. Sucks that this happened, especially now with how hard things have become to source.
 
Does the 5v DC plug not come off the jamma expander? Also the LCD display on the jamma expander doesn't turn on at all. And when I plugged in the DC supply that came with the Nano to the Nano it doesn't turn on any lights at all. Just kinda stumped as to what could have happened.
 
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7/8 sec mark you can see the fire under the barrel dc5v connector
Here's a screenshot.
 

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I much prefer to do support via e-mail. I answered your email within 5 hours and before you posted here, asking you some questions in about details about what had happened. Posting here in a public thread, without tagging me, and doing so before replying to my e-mails is well... I do not appreciate the topic of this post to put it that way.

As @Derick2k pointed out, the DC connector on the Expander is nothing but an extension of what comes from your cab.
You said in an email that your setup had been working for months. I do QA on all expanders before shipping them out, but even a catastrophically faulty expander will have a hard time doing any damage to the DE10 as all 'points of contact' are protected on the DE10 side of things (DC, HDMI, USB).

The electronics on expander (and the OLED) takes it's power from the DE10, so with a faulty DE10 or even one without an SD card, it will not light up.
 
I'm pretty sure I posted this before I seen or responded the emails and I tried trouble shooting with another member. My intention isnt to slander its to figure out what happened. I don't know but I did tell you that I noticed the dc5v barrel "gummy" and I'm not an expert but it seems to me that the expander does provide power to the Nano via the jamma edge or else how is the Nano even powered on? That's where I'm confused. I just want a resolution. We can close/erase this thread I just wanted to trouble shoot thats it.
 
I would open up the barrel part of the DC cable to have a look, perhaps something caused it to short out inside? I had one case where the polarity of that cable was reversed from the factory, and it got hot (but did not do any damage to the DE10).

Best is really if you have a multimeter and do a continuity check on that cable, and also on the DE10 side (without anything connected). The wires of the cable are a little 'gummy' as they are made from silicone.

https://irkenlabs.com/jamma-expander/hardware-details

This page has this diagram that tries to show how things are powered, passive delivery to the DE10, and the electronics on the expander is then powered via the USB connection. This is to protect both the DE10 and the expander.


1651085264110.png
 
invzim said:
I would open up the barrel part of the DC cable to have a look, perhaps something caused it to short out inside? I had one case where the polarity of that cable was reversed from the factory, and it got hot (but did not do any damage to the DE10).

Best is really if you have a multimeter and do a continuity check on that cable, and also on the DE10 side (without anything connected). The wires of the cable are a little 'gummy' as they are made from silicone.

https://irkenlabs.com/jamma-expander/hardware-details

This page has this diagram that tries to show how things are powered, passive delivery to the DE10, and the electronics on the expander is then powered via the USB connection. This is to protect both the DE10 and the expander.


1651085264110.png
Click to expand...
Ok I'll have a look tonight after work. I didn't recall the gunmy feel before. I know rubber usually feels that way after exposed heat so thought that correlated. I will respect your wishes to trouble shoot through email and I apologize if it seemed like I was being nasty about the irken product, that isn't and wasn't my intention. Just want to resolve this before I try anything else to possibly damage anything further.
 
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