Alex, I used to be an auto mechanic for GMC. I am very familiar with the MDI 2 interface module and I'm even more familiar with the people that use that hardware... a lot of them aren't exactly " firing on all cylinders " 🤣
Well, there is a reason paths were laid out the way they were, that is a differential pair. Not a big deal, but one could have gone into the effort of making it the same length and keeping it as close to each other as possible. This will certainly do the job but, definitely not better than factory.
Awesome repair. Interesting what you run into, some elevator accessory boards are hand soldered, and they just leave the flux on. Doesn't look very nice, also makes it difficult to see the bad solder joints.
The flux used on that job is rosin. The residue is not a problem since it is a good isolator, but of course it would have been better to not have a ton of residue.
What type of tweezer type soldering iron do you use? It looks small and nice. I was searching for that on your website, but didn't find it. Any link to purchase it? Please.
You say you sell all of the equipment that you use in your videos. I'm looking for hot tweezers but can't find them. What category are they in? Or are they not for sale?
that is not flux residue, is kolophonium or colophony and is a soldering resin. When i was a little boy, in Romania it was the only flux available on the market
@@JustInspiredKentI have been cleaning the soldered side of cb's with acetone, for years now, without any issues. I have it in a squeeze bottle with a small orifice, right next to my soldering iron. I've tried Flux-Off in a spray can, but it doesn't perform as well as acetone.
have you ever repaired a Midronics Gr8? i have one that won't see the clamps. its out dated tech but its a good power supply and battery tester if i can get it working again.
USB data lines (D+ and D-) should be of the same length in total on a PCB, especially for high-speed USB (such as USB 2.0 and above). This practice is critical to maintaining signal integrity and ensuring the proper operation of the USB interface (Signal Integrity, Impedance Matching, Crosstalk and EMI etc.). Maybe it's a bit theoretical and doesn't make a big difference in practice, but I wish this had been taken care of in this repair.
It won't matter. The idea is to have a specific resistance. And at those distances, from the connector to the resistors, 1 mm of wire will have zero effect. Also OBD2 is very low amounts of data, speed would have little to no effect as well.
I have a laptop that is in a dock for years. When I attempted to use the keyboard on the laptop, most of the keys didn't work. I didn't take it apart, but if it's not dust, what is it? Did it oxidise from lack of use?
please show us how to measure black smd inductor or resistor with no number short or not.that the only component im confusing to measure.alot of help from your video thank you.Northridge fix
In this video (guesswork on my part), I believe he is measuring in diode mode between the USB pins and ground 0V. In the first instance it was OL, leading to the discovery of the broken track, The 0.41V reading is likely due to reading through the inductor and the transorb, either leading direct into a micro or a USB transceiver (proving that these are all intact, effectively measuring the semiconductor interface via the inductor).
No it's not a clone MDI 2 , the Chinese rework them on a green PCB only, secondly the MDI 2 clone is a mdi 1 internals reworked on to a mdi2 style PCB layout . With the MDI 1 CPU daughter board and compact flash WiFi adapter, neither of these are present when Alex is holding it up for reassembly to big boss.
As an electrical engineer, you should know that those are high speed length matched pairs. There is a reason they are routed like that, and not just a straight wire like you did.
If this device's USB interface speed is not crucial and if an engineer is lucky to get fit in maximum skew limits, allowed by standard, then the device may me consider to be repaired. ))
You make it look easy but I am here to tell you when i'm doing work like this it's more like walking a tightrope blindfolded and sweating like a dog passen whale bones.
"we plugged in the cable the wrong way" Only to discover they tried replacing the connector & completely ripped off a pad. Did they really think you wouldn't notice? 🤦♂
As someone who uses this every day as a GM technician and accessory installer this is pretty damn cool to see
wow, you use that exact same device? that's so cool. Yea, it looks like a USB connector that you see on a printer (the female part)
Alex, I used to be an auto mechanic for GMC. I am very familiar with the MDI 2 interface module and I'm even more familiar with the people that use that hardware... a lot of them aren't exactly " firing on all cylinders " 🤣
thank you for sharing your skills. It’s like watching a micro surgeon operating. wonderful.
I’ve repaired the ones for mopar, and Kia. The dealers here are very happy.
Besides doing these repair videos in front of your desk, start a show where competitors will be competing for a Northridgefix award!
Another Awesome job by the electronics fixing King !!!!!!!!!!!!
Very smart to arrange workshops for finding staff
Stuff
That is better than factory.
👏👏👏
sounds like the owner was trying to blame his employee for damaging the device in the first place by saying he plugged it in the wrong way .lol
was about to hit my joint then you said that i about died laughing
It fell apart 🫢
Sometimes I just use these videos to fall asleep to. It's oddly satisfying and relaxing to watch
your work is mesmerizing... MashaAllah
imagine someone trying to put on their make up on the solder joints that came in!! they would look like The Joker!!
Well, there is a reason paths were laid out the way they were, that is a differential pair. Not a big deal, but one could have gone into the effort of making it the same length and keeping it as close to each other as possible. This will certainly do the job but, definitely not better than factory.
amazing job ,better that factory 👍👍
Awesome repair. Interesting what you run into, some elevator accessory boards are hand soldered, and they just leave the flux on. Doesn't look very nice, also makes it difficult to see the bad solder joints.
Auto mechanics can get any plug into any hole any way up.
Good repair on that data line.
Elinize emeğinize sağlık helal olsun bu işi hakkıyla yapıyorsunuz
It looks like solid rosin flux.
Hell, it works on plumbing, why wouldn't it work on micro electronics? LOL
@@allenahale1 it does. It just needs a good cleanup after operation.
The flux used on that job is rosin. The residue is not a problem since it is a good isolator, but of course it would have been better to not have a ton of residue.
I was not aware of that. I always thought "no clean flux" was not corrosive.
@@Franklinveterinarycenter1of4 I think it is a good practice to clean flux, as best as possible.
that ring looked fine in the previous shot
@@Cajun-bn7vs oh? Okay, thanks. Missed the flip
What type of tweezer type soldering iron do you use? It looks small and nice. I was searching for that on your website, but didn't find it. Any link to purchase it? Please.
Better than factory. 🎉
Interesting video again. 👍
Good job!
I have one of those gm mdis useful on Saabs
Are the metal sleeves produced anywhere so that you can replace them?
Lol perfect circles I can brush my teeth in that reflection
You say you sell all of the equipment that you use in your videos. I'm looking for hot tweezers but can't find them. What category are they in? Or are they not for sale?
Alex when are you going to carry hot tweezers? great repair p.s. I hope the cups i sent are serving you and big boss well.
I knew we could fix it.
Profe esas pistas están ruteados como diferencial pair creo
that is not flux residue, is kolophonium or colophony and is a soldering resin. When i was a little boy, in Romania it was the only flux available on the market
Rebranded Bosch VCIs.... I friggin hate the Mercury branded ones.
New word 'security camera' well noted hahahah
What to do when i kinda brok a ring around it, and it shows a little copper under
Is there any reason why acetone and a natural bristle brush would not be used to clean a board of flux residue? VOC's?
Acetone is able to dissolve or at least partially weaken the epoxide resin the board is made of.
@@Manu-nr1yt Yes exactly, plus you wouldn't want it getting inside connectors where there are plastic parts! Only some plastics are acetone safe.
@@JustInspiredKentI have been cleaning the soldered side of cb's with acetone, for years now, without any issues. I have it in a squeeze bottle with a small orifice, right next to my soldering iron. I've tried Flux-Off in a spray can, but it doesn't perform as well as acetone.
have you ever repaired a Midronics Gr8? i have one that won't see the clamps. its out dated tech but its a good power supply and battery tester if i can get it working again.
USB data lines (D+ and D-) should be of the same length in total on a PCB, especially for high-speed USB (such as USB 2.0 and above). This practice is critical to maintaining signal integrity and ensuring the proper operation of the USB interface (Signal Integrity, Impedance Matching, Crosstalk and EMI etc.). Maybe it's a bit theoretical and doesn't make a big difference in practice, but I wish this had been taken care of in this repair.
It won't matter. The idea is to have a specific resistance. And at those distances, from the connector to the resistors, 1 mm of wire will have zero effect. Also OBD2 is very low amounts of data, speed would have little to no effect as well.
I'd love to buy from you if you'd do shipping to Germany!
those look like my soldering, but I'm working on practice boards
I have a laptop that is in a dock for years. When I attempted to use the keyboard on the laptop, most of the keys didn't work. I didn't take it apart, but if it's not dust, what is it? Did it oxidise from lack of use?
In my experience it always involves a beverage 😂
please show us how to measure black smd inductor or resistor with no number short or not.that the only component im confusing to measure.alot of help from your video thank you.Northridge fix
In this video (guesswork on my part), I believe he is measuring in diode mode between the USB pins and ground 0V. In the first instance it was OL, leading to the discovery of the broken track, The 0.41V reading is likely due to reading through the inductor and the transorb, either leading direct into a micro or a USB transceiver (proving that these are all intact, effectively measuring the semiconductor interface via the inductor).
Salam alex how can i sign up for the workshop
th-cam.com/video/j7lvhlBajio/w-d-xo.htmlsi=lVm74iIB3BCn4uEm&t=865
Is it very common to lose a RAM slot? I have an issue with a motherboard where it won't post with more than 1 stick of RAM. Very annoying
I have one of those
Awesome ✌🏻✌🏻✌🏻
How you going to test that with out the other haft
Big Boss reassembles and tests.
Probably can plug it into a laptop and see if it recognizes it.
That lady's dusty laptop must have been buried in Alamogordo, next to the Atari 'E.T.' cartridges (6:27) 😇
how much you charge for this? :D
"everybody lies"
Dr House says so. So it must be true 😎
From the looks of that MDI 2 looks like a clone unit.
Its a Clone,... But the hardware is the same as the original,... software and update are different
@@NiduDingsda they say in the video that its not a clone though so who do i believe
I think you're a cloned person
@@IamWhoIam2023 I could be a clone.
No it's not a clone MDI 2 , the Chinese rework them on a green PCB only, secondly the MDI 2 clone is a mdi 1 internals reworked on to a mdi2 style PCB layout . With the MDI 1 CPU daughter board and compact flash WiFi adapter, neither of these are present when Alex is holding it up for reassembly to big boss.
Habibi try to make an online workshop
Doesn't it seem far more likely that someone tripped over the cable while holding the device?
Security mirror. Hahahahaha.
Knowing what type of soldering tools are used normally for wire repair in the automotive world. I can see why the soldering didn’t look that good. 🙃
both
As an electrical engineer, you should know that those are high speed length matched pairs. There is a reason they are routed like that, and not just a straight wire like you did.
Its not on the bus side,... Doesnt matter 👍
Lol ok Mr scientist, if it works, it works
"There is a reason they are routed like that" and what is that reason? What is the tolerance of those lengths? Are we still within that tolerance?
Hard to explain differential traces, length and impedance matching
If this device's USB interface speed is not crucial and if an engineer is lucky to get fit in maximum skew limits, allowed by standard, then the device may me consider to be repaired. ))
👌👍👌
You make it look easy but I am here to tell you when i'm doing work like this it's more like walking a tightrope blindfolded and sweating like a dog passen whale bones.
Plugged the wrong wat what the sigma
hi
😂😂
An ugly soldering job, what can you do? Blame the technician!😂
5th
"we plugged in the cable the wrong way"
Only to discover they tried replacing the connector & completely ripped off a pad.
Did they really think you wouldn't notice? 🤦♂
Love from Pakistan