Gaming Dsi XL schematic

reiL_0 · Aug 2, 2021

ok, so i have a problem with my dsi, while trying to do a hardmod I ripped off 3 resistors R54, R94, R113. so at least i need the values of those 3 components and where they connect to.

Thanks if anyone just take a photo of their own ds and share it with me.

Here is a photo of how screwed I am. :nds:

zxr750j · Aug 2, 2021

Maybe this helps...
https://guide-images.cdn.ifixit.com/igi/IVS53wyRXhabZeMG.huge

reiL_0 · Aug 2, 2021

No... for what i want i cant see correctly the paths, it needs to be a higher quality or closer to the MB[/QUOTE]

zxr750j · Aug 2, 2021

I've got most models, it's a dsi xl right? I'll open it up and try to post a pic tomorrow. Hopefully my camera will make a good picture...

reiL_0 · Aug 2, 2021

zxr750j said:
I've got most models, it's a dsi xl right? I'll open it up and try to post a pic tomorrow. Hopefully my camera will make a good picture...

ok tnks a lot, yes its a dsi xl

KleinesSinchen · Aug 2, 2021

Elandero said:
ok, so i have a problem with my dsi, while trying to do a hardmod I ripped off 3 resistors R54, R94, R113. so at least i need the values of those 3 components and where they connect to.

Are you sure they resistors are labeled with values? My bad camera can't capture anything.

This is only a part of the picture to save bandwidth. I try to be reasonable with image sizes which many people don't. If you need more of the surrounding area I can upload the complete picture as an non-embedded attachment (so it doesn't automatically load for anybody opening the thread).

reiL_0 · Aug 2, 2021

KleinesSinchen said:
Are you sure they resistors are labeled with values? My bad camera can't capture anything.

View attachment 271927

This is only a part of the picture to save bandwidth. I try to be reasonable with image sizes which many people don't. If you need more of the surrounding area I can upload the complete picture as an non-embedded attachment (so it doesn't automatically load for anybody opening the thread).

Thnks for the image, and no they are not labeled with value just from 1, 2, 3.... So if you can measure the values of each of them i would be really thankful.

KleinesSinchen · Aug 2, 2021

Elandero said:
Thnks for the image, and no they are not labeled with value just from 1, 2, 3.... So if you can measure the values of each of them i would be really thankful.

Well… it's shameful… but I will admit that I'm a big fool. I did do measurements, but I'm not quite sure I wrote it down correctly – which value goes to which resistor… and this was the reason for not including the numbers above.

I will repeat my measurements tomorrow and use second multimeter as well because I got a value in kΩ range for one resistor. No idea if this is plausible. This is what I have right now, but no guarantee

for correctness:



R54  →  52kΩ

R94  →  56Ω

R113 → 330Ω

Measuring these tiny resistors aren't easy. I don't want to damage this DSi XL by pushing the probes hard on the tiny solder joints. This thing is next to mint condition.

If anybody else got a DSi XL motherboard at hand and can do the measurements, this would be great!

reiL_0 · Aug 2, 2021

KleinesSinchen said:
Well… it's shameful… but I will admit that I'm a big fool. I did do measurements, but I'm not quite sure I wrote it down correctly – which value goes to which resistor… and this was the reason for not including the numbers above.

I will repeat my measurements tomorrow and use second multimeter as well because I got a value in kΩ range for one resistor. No idea if this is plausible. This is what I have right now, but no guarantee for correctness:

R54 → 52kΩ
R94 → 56Ω
R113 → 330Ω

Measuring these tiny resistors aren't easy. I don't want to damage this DSi XL by pushing the probes hard on the tiny solder joints. This thing is next to mint condition.

If anybody else got a DSi XL motherboard at hand and can do the measurements, this would be great!

tnks, i know that those components have high values so probably they are correct

FAST6191 · Aug 2, 2021

Measuring things in circuit is hard as you are also measuring the rest of the circuit (see parallel resistances, and the rest of the circuit effectively counts as one). Not so bad if it is a high resistance elsewhere but lower stuff/lower resistance path makes it tricky.
To do it properly you would have to at least remove one leg, though many go for straight removal. You can also do high frequency measurements as impedance around the rest of the circuit is often equivalent to high resistance (in normal hobbyist circles you might have an ESR meter for measuring dead capacitors, this is a high frequency resistance measuring device) but you won't necessarily get the out of circuit values of these as much as a variation on the theme - no simple values you can go to your stores/chosen electronics vendor and buy some cut tape from.

Pity they did not have any numbers on top, don't look scrubbed but guess they are too small for the usual three number setup of SMD resistors ( https://www.basictables.com/electronics/resistor/smd-resistor-code ).

I am not aware of any schematics that have been generated (nobody having fun like https://circuit-board.de/forum/index.php/Thread/13913-STRIP-CLUB-PCB-Scans/?pageNo=1 with DSi just yet, hopefully in a year or two we see DSi being basically given away like I had original DS and DS lites the other year, and GBAs up until about 4 years ago), leaked (nothing in the various gigaleaks that I saw) or otherwise made available.
If you can figure out what it is connected to (though I guess that is a nice BGA component nearby so have fun with that) then you might see if the circuit in question is basically the reference circuit from the manual.

KleinesSinchen · Aug 3, 2021

FAST6191 said:
To do it properly you would have to at least remove one leg, though many go for straight removal.

What?! No. I won't desolder components from a perfectly working device. Capacitors would be even more problematic in circuit I think.

Pity they did not have any numbers on top, don't look scrubbed but guess they are too small for the usual three number setup of SMD resistors ( https://www.basictables.com/electronics/resistor/smd-resistor-code )

They aren't too small – just not labeled. Yesterday I suspected the camera to be guilty of not capturing low contrast numbers. But the camera is innocent. Just remembered that I also knocked off one of those tiny imps when doing a DSi hardmod. The replacements have the three digit code printed on with good contrast so the camera has no trouble: (The resistors are only one millimeter long – can't read that without a magnifier anymore)

=======================

Anybody with a defective DSi XL motherboard willing to do this? I'll just wait a while and hope somebody will step in. Hope dies last. If nobody provides any results I'll repeat my naive measurements… but surely won't remove the resistors.

reiL_0 · Aug 3, 2021

FAST6191 said:
Measuring things in circuit is hard as you are also measuring the rest of the circuit (see parallel resistances, and the rest of the circuit effectively counts as one). Not so bad if it is a high resistance elsewhere but lower stuff/lower resistance path makes it tricky.
To do it properly you would have to at least remove one leg, though many go for straight removal. You can also do high frequency measurements as impedance around the rest of the circuit is often equivalent to high resistance (in normal hobbyist circles you might have an ESR meter for measuring dead capacitors, this is a high frequency resistance measuring device) but you won't necessarily get the out of circuit values of these as much as a variation on the theme - no simple values you can go to your stores/chosen electronics vendor and buy some cut tape from.

Pity they did not have any numbers on top, don't look scrubbed but guess they are too small for the usual three number setup of SMD resistors ( https://www.basictables.com/electronics/resistor/smd-resistor-code ).

I am not aware of any schematics that have been generated (nobody having fun like https://circuit-board.de/forum/index.php/Thread/13913-STRIP-CLUB-PCB-Scans/?pageNo=1 with DSi just yet, hopefully in a year or two we see DSi being basically given away like I had original DS and DS lites the other year, and GBAs up until about 4 years ago), leaked (nothing in the various gigaleaks that I saw) or otherwise made available.
If you can figure out what it is connected to (though I guess that is a nice BGA component nearby so have fun with that) then you might see if the circuit in question is basically the reference circuit from the manual.

ok, so the r94 and r54 goes to the samsung memory chip, so at least i got an idea where they go to. and the r113 i dont have any idea the traces are practically isolated

KleinesSinchen said:
What?! No. I won't desolder components from a perfectly working device. Capacitors would be even more problematic in circuit I think.

They aren't too small – just not labeled. Yesterday I suspected the camera to be guilty of not capturing low contrast numbers. But the camera is innocent. Just remembered that I also knocked off one of those tiny imps when doing a DSi hardmod. The replacements have the three digit code printed on with good contrast so the camera has no trouble: (The resistors are only one millimeter long – can't read that without a magnifier anymore)
View attachment 271976
=======================

Anybody with a defective DSi XL motherboard willing to do this? I'll just wait a while and hope somebody will step in. Hope dies last. If nobody provides any results I'll repeat my naive measurements… but surely won't remove the resistors.

there is no problem if u dont want to desolder components, im not asking for. however the data that you have already gave to me is more than anyone has. Thank you a lot, im really thankful

fli_guy84 · Aug 5, 2021

Based on the images here and the one posted by @KleinesSinchen, it seems like R94 and R54 are connected through a trace.

Assuming they are connected, R94 could be the series resistor and R54 could be the pull-up resistor for eMMC CMD respectively. Based on the table below taken from Samsung moviNAND datasheet (DSi NAND is moviNAND eMMC), pull-up resistance for CMD can be between 4.7k and 100k. So the value measured by @KleinesSinchen (R54 = 52k) seems to be in line with the spec. The closest E96 (1% tolerance) resistor value is 52.3k.

As for R94, this is a bit hard as it depends on the design of the board itself and is finalized for the best signal integrity by Nintendo engineers. But as a general rule, it can be from 0 to 100R. So the measured value of 56R could be correct.

I can't help with R113 though without knowing what is the signal it's connected to. Again, just conjecture on my side.

zxr750j · Aug 8, 2021

I bit late I admit...

R94 56Ω
R54 43.4kΩ
R113 330Ω
Measured with my trusty $10 multimeter...

zxr750j · Aug 8, 2021

R54 now reads 31,2KΩ...

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