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Did you read what FCC published at all? They published the BOM, with specific part numbers and alternatives, the full schematics, and block diagrams of where th

Did you read what FCC published at all? They published the BOM, with specific part numbers and alternatives, the full schematics, and block diagrams of where the chips are laid out. Any teardown org would be absolutely salivating at this info.

mikestew 1y ago
Did you read what FCC published at all? Most of it, yeah. Any teardown org would be absolutely salivating at this info. I'll disagree and say that any teardown org would be able to figure this out on their own in an afternoon, and end up with more information than the PDF in the process. You vastly over-estimate the value of schematics showing wire traces from one black box to another.
- Kirby64 1y ago
  No teardown org will know what the models of passives are, nor would they be able to figure out all the traces between various parts “in an afternoon”. This stuff takes days or weeks depending on the depth of understanding you want.
rs186 1y ago
A random vendor in Huaqiangbei likely can tell you more about what parts iPhone uses than this pdf file. You talk as if that's some secret.
- Kirby64 1y ago
  Hard to beat “every single part used” from this document. You talk as if the electronics market vendors have some ability to identify what capacitor models are used.
  - Liftyee 1y ago
    Generally the specific model of capacitor used only matters in terms of its engineering specifications (value, tolerance, dielectric, etc.), all of which affect its functionality in some measurable way. The specifications chosen for a given purpose are also often predictable - so if a reverse engineer knows this is a power filtering capacitor (for example), they might guess 0.1uF X7R ceramic... and confirm with measurements. Common "jellybean" passive components like resistors, capacitors, inductors... are designed to be standardized and interchangeable with any other component of the same specifications. The remaining factor might be cost and manufacturer (their quality control), but knowing which makes of capacitor are consistently reliable is hardly trade secret knowledge.
    - Kirby64 1y ago
      > Common "jellybean" passive components like resistors, capacitors, inductors... are designed to be standardized and interchangeable with any other component of the same specifications. The remaining factor might be cost and manufacturer (their quality control), but knowing which makes of capacitor are consistently reliable is hardly trade secret knowledge. Not even close to true for capacitors and inductors. True for resistors mostly, but inductors and capacitors have wildly different specifications depending on their intrinsic parameters. The derating curves (AC, DC, etc) vary wildly depending on the individual part selection. One capacitor may have double or triple the capacitance of another for the same size, nominal rating, and type at a specific voltage condition. Sure you can overbuild and not worry too much, but given the wildly small size of phones don’t be shocked if the individual components selected are very critical.

mikestew 1y ago

Did you read what FCC published at all? Most of it, yeah. Any teardown org would be absolutely salivating at this info. I'll disagree and say that any teardown org would be able to figure this out on their own in an afternoon, and end up with more information than the PDF in the process. You vastly over-estimate the value of schematics showing wire traces from one black box to another.

Kirby64 1y ago
No teardown org will know what the models of passives are, nor would they be able to figure out all the traces between various parts “in an afternoon”. This stuff takes days or weeks depending on the depth of understanding you want.

rs186 1y ago

A random vendor in Huaqiangbei likely can tell you more about what parts iPhone uses than this pdf file. You talk as if that's some secret.

Kirby64 1y ago
Hard to beat “every single part used” from this document. You talk as if the electronics market vendors have some ability to identify what capacitor models are used.
- Liftyee 1y ago
  Generally the specific model of capacitor used only matters in terms of its engineering specifications (value, tolerance, dielectric, etc.), all of which affect its functionality in some measurable way. The specifications chosen for a given purpose are also often predictable - so if a reverse engineer knows this is a power filtering capacitor (for example), they might guess 0.1uF X7R ceramic... and confirm with measurements. Common "jellybean" passive components like resistors, capacitors, inductors... are designed to be standardized and interchangeable with any other component of the same specifications. The remaining factor might be cost and manufacturer (their quality control), but knowing which makes of capacitor are consistently reliable is hardly trade secret knowledge.
  - Kirby64 1y ago
    > Common "jellybean" passive components like resistors, capacitors, inductors... are designed to be standardized and interchangeable with any other component of the same specifications. The remaining factor might be cost and manufacturer (their quality control), but knowing which makes of capacitor are consistently reliable is hardly trade secret knowledge. Not even close to true for capacitors and inductors. True for resistors mostly, but inductors and capacitors have wildly different specifications depending on their intrinsic parameters. The derating curves (AC, DC, etc) vary wildly depending on the individual part selection. One capacitor may have double or triple the capacitance of another for the same size, nominal rating, and type at a specific voltage condition. Sure you can overbuild and not worry too much, but given the wildly small size of phones don’t be shocked if the individual components selected are very critical.