820-3227 – Apple A1465
The Apple A1465 is built on the 820-3227 board. ChambersDesignInc.com has indexed 3 files for this board — 2 BIOS files and 1 schematic.
BIOS images are 8 MB. First posted in June 2024 in BIOS Archive, Schematics & Boardviews Archive and Cyberlan Electronics.
BIOS dumps 2
Schematics 1
Board facts
| Board number | 820-3227 |
|---|---|
| Numbering | Apple board number |
| BIOS chip size | 8 MB |
| First seen | 2024-06-02 |
| Source channels | BIOS Archive, Schematics & Boardviews Archive, Cyberlan Electronics |
| About the number | Apple logic boards are numbered 820-xxxx or 820-xxxxx; the trailing letter is the revision. |
Apple models for this logic board
| A-number | Model | Years |
|---|---|---|
| A1465 | MacBook Air 11-inch | 2012–2015 |
A-numbers come from the file names; the model names and years are Apple's published identifiers.
Laptops that use 820-3227
What these files are for
A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.
A schematic is the circuit diagram of the main board: power rails, power-up sequence, component values and net names. It is the reference for measuring voltages and tracing a fault.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| PDF schematic | any PDF reader; Sumatra PDF and Foxit handle large schematics well | |
| .rar | RAR archive | 7-Zip or WinRAR |
| .bin | BIOS image inside the archive (usually .bin) | a CH341A, XGecu T48 / TL866II Plus or RT809H programmer |
Questions
Is there a boardview for 820-3227?
No boardview has been indexed for 820-3227 yet; the schematic is available on this page.
Which laptops use the 820-3227 board?
Files in the catalog link 820-3227 to the Apple A1465.
What BIOS chip size does 820-3227 use?
The BIOS images for 820-3227 are 8 MB.
Where do the download links go?
Each button opens the original public Telegram post the file was shared in. ChambersDesignInc.com only indexes and cross-references those posts.