Lad711p Rev 10 Schematic Top ((link)) Jun 2026

Laptop motherboards rely on a strict power-up sequence. A failure in an early stage will prevent later stages from turning on. The LAD711P follows a standard Compal power distribution architecture. Primary Input Stage ( VIN )

The schematic’s top section contains the AC input, EMI filtering, rectification, and primary-side switching circuitry. This stage is responsible for converting mains AC to a high-voltage DC bus and initiating the switching process for downstream conversion.

: The board typically comes with integrated AMD APUs, including the E2, A6, and A8 series . Some variants feature the AMD A6-7310 processor. lad711p rev 10 schematic top

| Designator | Node | Expected Value (Standby) | |------------|-------------------|---------------------------| | TP1 | Bulk DC voltage | 320–380V DC | | TP2 | IC VCC | 12–18V DC | | TP3 | MOSFET Gate | 0V / 8–12V pulsed | | TP4 | Current sense (CS) | <1V peak (varies with load) |

Check the entry point through the DC-IN jack. Verify the first and second MOSFETs (often part of the B+ circuit) for 19V delivery. Laptop motherboards rely on a strict power-up sequence

The voltage from the DC power adapter (+DC_IN) passes through two protection MOSFETs controlled by the charging IC (often a BQ-series controller). Once validated, it becomes the or +PWR_SRC rail. This rail distributes 19V across the entire top layer of the motherboard to feed all step-down switching regulators. 2. The Always-On Rails (+3VALW / +5VALW)

Check for 3.3V at the EC power pins. Verify that the BIOS chip is not corrupted, as this is a common failure point for this board when it experiences a "no-boot" scenario. C. RAM Slots (Top Side) Primary Input Stage ( VIN ) The schematic’s

AMD-based (often featuring A-series APUs like the A10-9600P). Typically supports DDR4 RAM modules.