La-d402p Schematic Jun 2026

Find the PWM controller responsible for generating +3VALW and +5VALW . If these are missing, the power button will not function. No Display (Motherboard Powers On, Fan Spins)

A (often just called a "schematic") is a detailed electrical engineering drawing that shows exactly how every component on the motherboard is connected. It acts as the map of the board, allowing you to:

Once you have the PDF and boardview files, here’s how to make the most of them:

If you cannot find the exact LA-D402P schematic, search for LA-E401P or LA-F411P – they share similar power delivery designs and may be close enough for basic voltage rail tracing.

Locate the input protection MOSFETs near the USB Type-C ports on the schematic. la-d402p schematic

[DC Jack / 19.5V] ──> [+19V_4G / B+] ──> [+3.3V_ALW & +5V_ALW] ──> [EC / KB9022 Power-up] │ [+1.05V_VCCST] <── [+1.35V_V_MEM] <── [Power Button Pressed] <──────────┘ │ └──> [+1.05V_PCH] ──> [+0.9V_VCCCORE] ──> [PLT_RST# Released] The Primary Rail Breakdown

(.cad or .brd formats) for tracing physical component locations. Voltage Rails and SMBUS block diagrams. Laptop schematic Diagnostic Tips

Navigating a 50+ page Compal schematic requires structured logic. Follow this step-by-step diagnostic workflow when utilizing the diagram:

The (often referred to as the Compal LA-D402P) is a high-density, ultra-thin motherboard schematic designed for the premium HP Spectre 13-V series laptops, including models like the 13-v106tu, 13t-v, and others running 7th Generation Intel Core processors. Find the PWM controller responsible for generating +3VALW

: Specifically designed for the ultra-thin HP Spectre 13-v motherboard (often labeled as the "AHL30" or similar Compal internal name).

Here are three real-world repair scenarios where the schematic is essential:

The your motherboard is displaying (e.g., short circuit, liquid damage, flashing light).

If you are looking for technical documentation or repair insights, the following resources are the most "interesting" deep dives into this specific hardware: Technical Documentation & Analysis Schematic Overview : The LA-D402P typically features an AMD Stoney Ridge Bristol Ridge It acts as the map of the board,

: The document outlines the critical "Power-On Sequence," which tracks how 19V from the adapter is converted into lower voltages (like 3.3V and 5V) to wake various system components. Diagnostic Components : It identifies the specific KBC (Keyboard Controller)

Intel Core i5 / i7 Mobile Processors (typically 6th Gen Skylake-U or 7th Gen Kaby Lake-U architectures) Graphics: Integrated Intel HD Graphics

board is densely packed. Repairing common issues like a "dead" laptop requires the schematic to: