Le Quang Vinh's contributions went beyond just hosting PDF files. The website also offered numerous technical tutorials and repair guides, covering topics like:
Look for the main system rail, often labeled as B+ , VIN , or VBAT . If a protection MOSFET is blown, the 19V/20V power will stop right at the entrance, leaving the laptop completely dead. 2. The 3.3V and 5V Always-On Rails
Text boxes with arrows pointing inward indicate input signals; pointing outward indicates output signals. Two-way arrows signify bidirectional data busses. lqv77 laptop schematics
An LQV77 schematic is organized logically into several interconnected blocks:
+-----------------------------------------------------------------------+ | LQV77 BLOCK DIAGRAM | | | | +------------------+ High-Speed Bus +---------------------+ | | | |========================| Discrete GPU | | | | | (PCIe x8/x16) | (NVIDIA/AMD) | | | | | +---------------------+ | | | | || | | | | GDDR VRAM | | | Central CPU | System Memory || | | | / SoC Hub |========================[ SO-DIMM Slot 1 & 2 ] | | | | (DDR4/DDR5) | | | | | | | | Low-Speed Buses +---------------------+ | | | |------------------------| Embedded Controller| | | +------------------+ (LPC / eSPI / SMBus)| (EC / KBC Chip) | | || +---------------------+ | | Display Lanes (eDP) || | | || Power Sequencing | | [ LCD Panel Port ] [ Power Button/LEDs ]| +-----------------------------------------------------------------------+ The System Block Diagram Le Quang Vinh's contributions went beyond just hosting
Power IC (PWM controllers) and Power Mosfet (switches).
Used for safe voltage injection to heat up and locate shorted components. An LQV77 schematic is organized logically into several
Technical forums often have threads dedicated to sharing these files. How to Read and Use the Schematic Diagram
: Determining correct power rails (e.g., 3V, 5V, 1.2V) to diagnose "no power" issues.
