Switch OLED teardown V1/V2

mvmiranda

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The two pins you mentioned are not connected inside the eMMC but the pins on the board could be connected to ground.
So bridging them COULD cause issues in DAT0 touches them.
We need to wait for a proper PCB delayer to see that is connected to where.
THAT could be a thing, yes! :)
 
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sean222

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The two pins you mentioned are not connected inside the eMMC but the pins on the board could be connected to ground.
So bridging them COULD cause issues in DAT0 touches them.
We need to wait for a proper PCB delayer to see that is connected to where.
Didn't know this...Thanks!
 

TheUnknownOne

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In the end either we will need to remove, reball and reflow that chip, or some sort of thin PCB that can slide under will be needed.

For those that can't do this type of thing, they will he paying $$$ for the installation alone.
 
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FR0ZN

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So I was looking at the delayered images of the Switch Lite PCB here: http://balika011.hu/switch/lite/

If you remove the first layer, you get this view:
1635425196601.png

And if you remove 2 more layers you can see this:
1635425284036.png

So to me it seems, that the first layer, is connected to 19 points on the third layer.
If we translate these pins to the top layer, we can see which of these points are connected:

1635425517856.png

So I had a bit of free time and doodled a QSB, which is looks something like this:

1635425995331.png

The idea goes like this:

1) Remove the eMMC and clean it
2) Clean the Switch PCB
3) Solder the QSB to the 19 points on the Switch PCB
4) Use thin double sided tape and apply it to the Switch PCB
5) Flip over the eMMC, so the BGA points upwards and place it face down on the double sided tape
6) Bend the QSB over towards the BGA
7) Solder the QSB onto the BGA and restore the connection to the Switch PCB this way
8) Use exposed DAT0 to solder it to the modchip

So if you'd look at it from the side, it would look like this:

1635426833226.png

NOTE: The design has a few errors on the bottom part - I mirrored it incorrectly and the pin on the bottom needs to be rerouted to the corresponding pin on the BGA.
I just couldn't be assed to finish it 100% in Paint.net, but you should get the idea :D

As I said, this is just me talking out of my ass, but should it be possible to create such a QSB, then I'm sure that this will be a lot easier to install.
Because reworking a BGA, even that small, is not as easy as it seems - but removing the eMMC, cleaning it and soldering 19-20 pins on both sides should be as hard/easy as soldering the SoC QSB.

What do you guys think?
 
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grubgrub

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So I was looking at the delayered images of the Switch Lite PCB here: http://balika011.hu/switch/lite/

If you remove the first layer, you get this view:

And if you remove 2 more layers you can see this:

So to me it seems, that the first layer, is connected to 19 points on the third layer.
If we translate these pins to the top layer, we can see which of these points are connected:


So I had a bit of free time and doodled a QSB, which is looks something like this:


The idea goes like this:

1) Remove the eMMC and clean it
2) Clean the Switch PCB
3) Solder the QSB to the 19 points on the Switch PCB
4) Use thin double sided tape and apply it to the Switch PCB
5) Flip over the eMMC, so the BGA points upwards and place it face down on the double sided tape
6) Bend the QSB over towards the BGA
7) Solder the QSB onto the BGA and restore the connection to the Switch PCB this way
8) Use exposed DAT0 to solder it to the modchip

So if you'd look at it from the side, it would look like this:


NOTE: The design has a few errors on the bottom part - I mirrored it incorrectly and the pin on the bottom needs to be rerouted to the corresponding pin on the BGA.
I just couldn't be assed to finish it 100% in Paint.net, but you should get the idea :D

As I said, this is just me talking out of my ass, but should it be possible to create such a QSB, then I'm sure that this will be a lot easier to install.
Because reworking a BGA, even that small, is not as easy as it seems - but removing the eMMC, cleaning it and soldering 19-20 pins on both sides should be as hard/easy as soldering the SoC QSB.

What do you guys think?


What about all the other points on the PCB?
Are they not connected to anything?
 

FR0ZN

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I just saw that the iPhone scene already did what I proposed above.
This has to be the way for people who cant'/don't want to reball.
This method is way safer then the current implementation.
 

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mvmiranda

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I just saw that the iPhone scene already did what I proposed above.
This has to be the way for people who cant'/don't want to reball.
This method is way safer then the current implementation.
Riiight!
So, expect it Soon™.

Honestly I was considering your proposal kind of "otherworldly" and then you come and BAM show me something similar already done. :P

Nice! :)
 

FR0ZN

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Riiight!
So, expect it Soon™.

Honestly I was considering your proposal kind of "otherworldly" and then you come and BAM show me something similar already done. :P

Nice! :)
It's not as otherwordly as reworking the BGA while fiddling a cable in there :D

I also just noticed that they can grab all other signals from there as well (CLK, CMD, etc.)

So this way the install could consist of 2 QSBs just like the Lite + is cleaner + safer.
I realy hope they do it this way.
 
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FR0ZN

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@FR0ZN, any good news? Seems no such cable anybody used for oled switch.
Hope someone have a try and success!
I haven't looked further into this.
As I said, I never made any PCB designes myself - what I showed was just me doodleing something together :D

I myself am currently putting my hopes into whoever is building the HWFLY modchips, to create a redesign for the OLEDs and adapt the eMMC flex cable method.

Slaughtering a Core or Lite modchip into the OLED is "dirty" imo.
 
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vailon_yg

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I haven't looked further into this.
As I said, I never made any PCB designes myself - what I showed was just me doodleing something together :D

I myself am currently putting my hopes into whoever is building the HWFLY modchips, to create a redesign for the OLEDs and adapt the eMMC flex cable method.

Slaughtering a Core or Lite modchip into the OLED is "dirty" imo.
That's a good idea~~
 
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