USB wiring to MDI

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USB wiring to MDI

Postby VX L67 Getrag » Tue Aug 27, 2019 3:59 pm

The USB connector on my MDI was falling apart & dodgey so I removed it but wondered if anyone knows what wire goes to what?
93D482F7-4CAD-4784-BAFD-44716ED24395.jpeg


I think from top left to right is black then greeen then red
On bottom from left first is left empty & then white
Then I can put the shield to either of the big bottom holes which was supports for USB connector

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Re: USB wiring to MDI

Postby j_ds_au » Tue Aug 27, 2019 11:30 pm

From left to right, ignoring rows, it should be :
Black, Nothing, Green, White, Red.

So, that matches what you came up with.

Joe.

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Re: USB wiring to MDI

Postby VX L67 Getrag » Wed Aug 28, 2019 7:05 am

Ahh cool, thanks for that... makes me feel a lot better before a solder a cable direct!

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Re: USB wiring to MDI

Postby Holden202T » Wed Aug 28, 2019 10:48 pm

i had the same issue with mine, i got usb connectors off ebay pretty cheap, might be a better solution ?

unfortunately mine doesnt work with the new plug, need to test not sure if i've shorted two together, too small for my liking!

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Re: USB wiring to MDI

Postby VX L67 Getrag » Fri Aug 30, 2019 9:35 am

Yeah I thought it may be my soldering skilled too but all looks & tests well with multimeter as none are connected with open loop shown to all except earth & white which is high resistance & not zero so thinking that’s normal.

Then there is 5v to red between it & black, it also shows 5v to red from the shield wires to as I have them connected to outer big holes but not sure if I should have them connected & may try cutting them off & see if it helps as it’s not recognising the device.

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Re: USB wiring to MDI

Postby VX L67 Getrag » Sun Sep 08, 2019 11:14 pm

so I tried all other options & nothing fixed it connecting to device, so I have ordered another MDI & will attempt to fix this issue later but think I have lifted pads when soldering as it is dual sided PCB.

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Re: USB wiring to MDI

Postby antus » Mon Sep 09, 2019 5:53 pm

you can see the components the pads link to, you could try soldering to the end of the components. I think that large green component is a fuse, might be worth checking for continuity across it.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: USB wiring to MDI

Postby j_ds_au » Mon Sep 16, 2019 10:06 am

antus wrote:you can see the components the pads link to, you could try soldering to the end of the components. I think that large green component is a fuse, might be worth checking for continuity across it.

The two large green bits are Polyswitch resettable fuses. Unless faulty, they don't "blow" as such, like a conventional fuse (but it doesn't hurt to check them anyway).

Joe.

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