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820-00939-A J174 Circuit diagram.pdf

Schematic for Apple J174 · board 820-00939-A · 3.5 MB · shared in 1 Telegram post.

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TXTAbout 820-00939-A J174 Circuit diagram schematic

820-00939-A J174 Circuit diagram is a free Apple J174 motherboard schematic diagram for board 820-00939-A. The PDF file is 3.5 MB. It was first posted on 7 Mar 2026 and is available in 1 Telegram channel.

The 820-00939-A 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.

Type
Schematics
Format
.pdf · PDF schematic
Size
3.5 MB
Brand
Apple
Board number
820-00939-A
Model
J174
First posted
7 Mar 2026
Last posted
7 Mar 2026
Sources
1

Tags

820-00939-A schematic820-00939-A schematic diagramApple 820-00939-AApple J174 schematicApple J174 motherboardApple J174 circuit diagramApple schematic pdflaptop schematic diagramApple laptop schematic diagramschematic free download

J1Download 820-00939-A schematic from Telegram

R1How to download 820-00939-A J174 Circuit diagram

  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 820-00939-A J174 Circuit diagram.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 820-00939-A. 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.