Toshiba · laptop motherboard

Toshiba Satellite U305 DABU1MMB6A0

SchematicBIOS
Board code
DABU1MMB6A0
Platform
Quanta BU1M
Made by
Quanta
Revisions
Rev 3A, Rev A
Files
5
Updated

Toshiba Satellite U305 DABU1MMB6A0 is a laptop motherboard designed by Quanta and used in the Toshiba Satellite U305, Toshiba Portege M600 and Toshiba Satellite U300.

The catalog has 4 schematics and 1 BIOS file for it, posted between 2020 and 2026 across 3 Telegram channels. Each download button opens the original Telegram post.

File names mention 2 board revisions (Rev 3A and Rev A). Check the revision printed on your PCB before relying on a boardview or flashing a BIOS dump — How to Open .FZ Boardview Files explains why it matters.

The schematic files are PDFs; the first pages usually hold the block diagram and the power sequence. New to schematics? Start with How to Use a Schematic and a Boardview Together.

Read and save the original chip contents before you write anything to it — Keeping the Windows Product Key (MSDM) When Reflashing a BIOS.

Also listed under platform Quanta BU1M.

Compatible models

Files for Toshiba Satellite U305 DABU1MMB6A0

Schematics 4 All schematics →

BIOS and firmware 1 All bios and firmware →

Frequently asked questions

Which laptops use the DABU1MMB6A0 motherboard?
File names in the catalog tie DABU1MMB6A0 to the Toshiba Satellite U305, Toshiba Portege M600 and Toshiba Satellite U300. Laptops sold under one model name can use different boards, so confirm by the code printed on the motherboard.
Which revision of DABU1MMB6A0 do I have?
Files for this board mention Rev 3A and Rev A. The revision is printed on the PCB silkscreen, usually next to the board code. Pick files with the same revision when you can; if yours is not listed, the closest revision is usually fine for the schematic but check part positions in the boardview carefully.
What should I check before flashing the DABU1MMB6A0 BIOS?
Read the original chip with a programmer and save two copies before writing anything. A dump from another board carries that board's serial number and MAC address, so restore yours from the backup.

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Files are hosted on Telegram by third parties; ExcitingSpas.com only links to public posts. Check that a file matches your board before using it. Disclaimer · Report a file