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UM3B UM6B_UMA_R1C 20090930_1500_st-1_stephen.pdf

Schematic · 1.3 MB · shared in 6 Telegram posts.

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TXTAbout UM3B UM6B UMA R1C 20090930 1500 st-1 stephen schematic

UM3B UM6B UMA R1C 20090930 1500 st-1 stephen is a free UM3B / UM6B / st-1 motherboard schematic diagram. The PDF file is 1.3 MB and covers board revision 1C. It was first posted on 17 Jul 2020 and is available in 6 Telegram channels.

The UM3B 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 laptop boards.

Type
Schematics
Format
.pdf · PDF schematic
Size
1.3 MB
Brand
—
Model
UM3B, UM6B, st-1
Revision
1C
Notes
UMA (integrated graphics)
First posted
17 Jul 2020
Last posted
12 Sept 2025
Sources
6

Tags

UM3B schematicUM3B motherboardlaptop schematic pdflaptop schematic diagramschematic free download

MSGFrom the Telegram post

UM3B UM6B UMA R1C 20090930 1500 st-1 stephen Schematic

J1Download UM3B schematic from Telegram

R1How to download UM3B UM6B UMA R1C 20090930 1500 st-1 stephen

  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 UM3B UM6B_UMA_R1C 20090930_1500_st-1_stephen.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 UM3B. 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.