Reference sheet for the Apple A2141 logic board 820-01700, listing resistance values across the large inductors, 2.93 MB PDF. Measuring resistance to ground at the power-stage inductors and comparing with known good figures quickly shows a shorted or open rail before the board is powered. Use a multimeter in resistance or diode mode with the board unplugged. Check that the 820 number matches, and keep in mind that readings can vary a little with meter type.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @LaptopsBoardview. Enginerys does not host this file.
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The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @LaptopsBoardview | 1 Jun 2023 | Open file on RM Schematics |
| @generalschematics | 19 Oct 2024 | Open file on RM Schematics |
| @ShareMan_Electronic_Files | 10 May 2025 | Open file on RM Schematics |
| @pkbiosbdv | 27 Oct 2025 | Open file on RM Schematics |
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