Lae791p Rev 20 Schematic Diagram Verified !exclusive! -

A verified schematic allows you to trace the voltage from the DC jack to the CPU core. Check these standard values during your diagnostic phase:

Managed by two N-channel MOSFETs (typically PQB1 and PQB2) controlled by the Charging IC (ISL88739 or similar).

| Ref Des | Description | Value / Part Number | Package | Qty | | :--- | :--- | :--- | :--- | :--- | | U1 | Switching Regulator | OM-PSU-24V | SMD-8 | 1 | | U2 | Timer Controller IC | LAE-TIMER-ASIC | SOP-16 | 1 | | K1 | Power Relay | SPDT 5A 250VAC | Through-Hole | 1 | | VR1 | Trimmer Potentiometer | 1M Ohm | 3296W | 1 | | RV1 | Metal Oxide Varistor | 275V 10mm | Disc | 1 | | Q1 | NPN Transistor | 2N2222A | TO-92 | 1 | | C1 | Electrolytic Capacitor | 47uF 400V | Radial | 1 |

Technical overviews and full 34-page documents are hosted on Scribd - LA-E791P Rev 2.0 . lae791p rev 20 schematic diagram verified

host verified BIOS dumps and schematic files for this revision. Are you troubleshooting a specific issue like a "no power" state or "no display" on this board?

Locate the inductor coils for the 3.3V and 5V system. Confirm that +3VALW and +5VALW are active.

Essential for locating physical components on the PCB, found at The Tech Stall . A verified schematic allows you to trace the

You can find thousands of unverified schematics online. However, the keyword here is . A verified schematic has been cross-checked against a physical LAE791P REV 20 board using one or more of these methods:

Sky Lake-U (Intel) or AMD CPU variants depending on the specific model.

Disclaimer: These schematics are usually confidential Compal Electronics property. Always use trusted, reputable sources for downloads to avoid malware. Conclusion host verified BIOS dumps and schematic files for

The LAE791P (often carrying the full Compal designator like EA50_HB LA-E791P ) is a widely deployed laptop motherboard. Understanding its core architecture helps you isolate faults quickly. Hardware Architecture

Low resistance (less than 10-20 Ohms) indicates a downstream short circuit. If the resistance is high, plug in the adapter and verify if +3VALW and +5VALW are generated. Step 3: Analyze the Power Button Signal

Powers the Super I/O (Embedded Controller) and the BIOS IC.