SCH

A1278 820-2936-B k90i.pdf

Schematic for Apple A1278 / k90i · board 820-2936-B · 1.8 MB · shared in 5 Telegram posts.

TXTAbout A1278 820-2936-B k90i schematic

A1278 820-2936-B k90i is a free Apple A1278 / k90i motherboard schematic diagram for board 820-2936-B. The PDF file is 1.8 MB. It was first posted on 3 Mar 2023 and is available in 5 Telegram channels.

The 820-2936-B schematic shows the complete circuit of the motherboard: the always-on 3VALW / 5VALW rails, the battery charger, CPU core and memory power, USB, display, audio and the BIOS/EC section. Use it to trace no-power, no-display, short-circuit and not-charging faults on Apple boards.

For the same board you can also find BIOS dumps and board packs — see all 820-2936-B files.

Type
Schematics
Format
.pdf · PDF schematic
Size
1.8 MB
Brand
Apple
Board number
820-2936-B
Model
A1278, k90i
First posted
3 Mar 2023
Last posted
11 Sept 2025
Sources
5

Tags

MSGFrom the Telegram post

A1278 820-2936-B k90i Schematic

J1Download 820-2936-B schematic from Telegram

R1How to download A1278 820-2936-B k90i

  1. Press Download in Telegram. The post opens in the Telegram app, or on a t.me preview page — choose “View in Telegram”.
  2. You don’t need to join the channel. Tap the file A1278 820-2936-B k90i.pdf to download it.
  3. Open it with Any PDF reader or SumatraPDF.

If a post was deleted, try another source above or search for 820-2936-B. Step-by-step help: downloading from Telegram.

.PDFWhat is a .pdf file and how to open it?

PDF schematic. A circuit diagram of the motherboard, page by page.

Open with:

  • Any PDF reader
  • SumatraPDF
  • Your web browser

Tip: Press Ctrl+F and search for a part (PU1, PQ3) or a net name (+3VALW, PWR_EN) to jump straight to it.