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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


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Old 03-03-2021, 07:09 AM   #1
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S13 Digital Speedo repair solution

There is a well-known manual for repairing a speedometer with replacing a capacitor. But after repairing my own and several others, I discovered that in fact the problem is not in the capacitor, but in the pins with which the small additional boards are attached to the main board:
https://www.youtube.com/watch?v=oOqNdMhogJU&feature

All speedometers I have seen have had this problem. The soldering on these pins just cracks over time. It would seem that you can simply renew the solder. But the problem is that the boards are made using a very strange technology with deposition of a conductive layer on a ceramic substrate. And after cracking off the spraying, there is simply nowhere to solder. After suffering with the restoration of a couple of pieces, I decided to just make the boards from scratch.

Here's the result:





And here are the gerber files and lists of components, with which you can order the manufacture of boards:
https://drive.google.com/drive/folde...t2?usp=sharing

Most of the components can be simply rearranged from the old board, but there are also spray-applied resistors. They will have to be bought new.

Last edited by Simon_Ru; 03-04-2021 at 12:32 AM..
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Old 03-04-2021, 12:34 AM   #2
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Pictures updated
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Old 03-04-2021, 12:51 AM   #3
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This is very neat, have you made a functioning replacement yet?
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Old 03-04-2021, 01:27 AM   #4
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I've ordered a few boards, they're coming. Not tested yet, but it should definitely work. Will update later with real photos and test results.
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Old 03-04-2021, 09:35 AM   #5
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Are you going to sell them??

And if you do, good thing I saved mine


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Old 03-04-2021, 11:00 AM   #6
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I had no such plans. But if it needs to, I can create a sales topic when I get the boards.
Anyone can order it yourself at jlcpcb.com or pcbway.com with the files above.
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Old 03-04-2021, 04:26 PM   #7
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I would definitely purchase a few sets of boards if you offer them!
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Old 03-14-2021, 12:52 PM   #8
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props for your soldering and wiring knowledge and skills.
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