820-1540
820-1540 is an Apple main board number. 3 files are indexed for this board: 3 schematics and 3 boardviews.
The earliest file dates from June 2021 (Schematics & Boardviews Archive and Cyberlan Electronics).
Schematics 3
FileSizeRevAddedSource
LB# 820 1540 ''Board View'' file & schematic diagram project Q45B
SchematicBoardview
3.7 MB
—
Get on Telegram Schematics & Boardviews Archive +1 more
LB# 820 1540 ''Board View'' file & schematic diagram project Q45A
SchematicBoardview
3.7 MB
—
Get on Telegram Schematics & Boardviews Archive +1 more
LB# 820 1540 ''Board View'' file & schematic diagram project Q45
SchematicBoardview
4.0 MB
—
Get on Telegram Schematics & Boardviews Archive +1 more
Board facts
| Board number | 820-1540 |
|---|---|
| Numbering | Apple board number |
| First seen | 2021-06-15 |
| Source channels | Schematics & Boardviews Archive, Cyberlan Electronics |
| About the number | Apple logic boards are numbered 820-xxxx or 820-xxxxx; the trailing letter is the revision. |
What these files are for
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.
A boardview is the component placement map of the PCB: click a part or a net and the viewer highlights where it is and what it connects to. Used together with the schematic to find test points.
Tools to open these files
| Format | What it is | Open with |
|---|---|---|
| .rar | RAR archive | 7-Zip or WinRAR |
Questions
Is there a boardview for 820-1540?
Yes, 3 boardview files.
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.