Switch OLED teardown V1/V2

mvmiranda

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My switch still boots up normally as if nothing was installed though. Wouldn’t a short on the cpu cable prevent that?
You mean if you disconnect the HWFLY 3,3v?

My Switch is blinking 15 times (blue and a litle bit red at same time(wondering)) than 1 sec full red and switch off (screen black)
any idea ?
The blue/light red light blinking is normal.
The solid red light might be a bad connection to the DAT0 line.
Double check it :)
 

gregor4711

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The blue/light red light blinking is normal.
The solid red light might be a bad connection to the DAT0 line.
Double check it :)
Value with digital Multimeter is 712, which should be fine.
Is there any chart aviable where I can see the other values for the other points?
 
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mvmiranda

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Value with digital Multimeter is 712, which should be fine.
Is there any chart aviable where I can see the other values for the other points?
What I have seen so far is, pretty much all lines, except the RST one, should be around the same value you for in your DAT0 when you measure its continuity against GND. :)
RST is always OL ("disconnected") when the board is not functioning.
 

gregor4711

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RST is always OL ("disconnected") when the board is not functioning.

getting the following values against GROUND (hausing USB port) :

DAT0-751
CMD-691
CLK - OL with Beep
RST- OL no beep
CPU-I - 0.000 with Beep
CPU-2 - 0.000 with Beep

is RST the issue, should RSt also be with beep?

sorry I'm an elektronic noop
 
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mvmiranda

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getting the following values against GROUND (hausing USB port :

DAT0-751
CMD-691
CLK - OL with Beep
RST- OL no beep
CPU-I - 0.000 with Beep
CPU-2 - 0.000 with Beep

is RST the issue, should RSt also be with beep?

sorry I'm an elektronic noop
Your issue is, most likely, CLK. CLK should, also, measure around 700 just like DAT0 and CMD.

RST should be OL, as I mentioned above, and CPU 1 and 2 should beep since it's right on the CPU itself and all capacitors around the CPU measure a "short". Just make sure it's not, actually, shorting anything.
If possible, inspect the solder points with a magnifier or take a macro picture and carefully inspect it.

Good luck!
 
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kerelenko

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check that your CLK point is not shorted. The point itself is very close to the ground where you cut the metal shield. Also measure again from the modchip side after covering it with the metal shield.
 
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doom95

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The black pcb on your image in the spot where the eMMC goes looked like the sandwich board that was posted here a few weeks ago. It exposes several of the lines to run to the modchips right from underneath the eMMC, so it could make for a cleaner install of you're willing to reball both the sandwich and the memory.
 

grubgrub

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Hi Grubgrub

I have some spare parts DAT0 left:). Please PM me if any interest.

fair price per pice + registeres international Mail (= 5,50 Euro)

1-4 = 15 Euro per piece
5-10 = 12 Euro per piece
10 - = 10 Euro per piece

Thanks Gregor, the DAT0 adaptor arrived safely today!

That thing is super small

I dont have a OLED yet to try it on, hopefully soon!
 

gregor4711

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Thanks Gregor, the DAT0 adaptor arrived safely today!
cool
That thing is super small
Yes, its realy tiny. Also the fixing is quite complikatet. I try it with hot glue (don't work) and with super glue and activator spray (this work). Use a multimeter to check value between 500 -700 (mine was 751) **befor** you glue it.:)
 

mvmiranda

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cool

Yes, its realy tiny. Also the fixing is quite complikatet. I try it with hot glue (don't work) and with super glue and activator spray (this work). Use a multimeter to check value between 500 -700 (mine was 751) **befor** you glue it.:)
UV mask + UV amp would be "safer".
You have plenty of time to position the flex board before "activating" the mask cure with the lamp.
 
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doom95

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I got a boatload of eMMC DAT0 adapters in and as promised a little while ago I'm offering them cheaply in hopes of helping some people out here and perhaps recuperate part of the investment. I'm not too likely to work on 1000 devices in this lifetime so might as well distribute a few :)

First some pictures...

Nearly 1000 adapters
boatload.jpg

Reflow attempt: I added some flux to the adapter before shoving it underneath the eMMC. After a simple short reflow profile it was firmly attached already. This should definitely form a good, lasting electrical connection, hopefully better than simply relying on friction to do a good long-term job.
reflow.jpg

Regardless, conformal coating certainly adds some mechanical robustness, so I tacked it down with a small layer.
mask.jpg


If you need a small quantity of adapters, I've repurposed a paypal button over at https://munia.io/devices for a simple checkout. Price will be €1 per adapter, €3,10 flat-rate shipping world wide in untracked envelope, and 21% tax. Hopefully that seems reasonable.
 

kerelenko

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Can someone help me get the value of this capacitor beside the CMD point please? Mine blew up while I was soldering the CMD point
 

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