Gate of PQ101 is driven by (BAT100). Schematic shows gate should be pulled low by charger IC’s ACDRV (pin 4). Measure ACDRV – 0V. BQ24780S is faulty.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
The La-c781p schematic is a valuable resource for engineers, technicians, and enthusiasts working with electronic circuits. By understanding the La-c781p schematic, individuals can design efficient power supplies, troubleshoot complex issues, and optimize system performance. As technology continues to evolve, the La-c781p schematic will remain an essential tool for anyone working with electronic systems. La-c781p Schematic
Laptop dead when AC is plugged. No charging LED.
By combining the LA-C781P schematic diagram with a digital boardview file (.BRD or .CAD format), you can seamlessly bridge the gap between the theoretical circuit diagram and the physical component locations on your workbench. Gate of PQ101 is driven by (BAT100)
Repairing modern laptops often feels like navigating a maze without a map. If you are working on an HP 15-af series laptop, that map is the Compal LA-C781P
When you open the schematic, the diagnostic process relies on following the power-up sequence. Based on professional repair logs for this specific motherboard, the power rails and signals flow in this order: BQ24780S is faulty
The schematic's KBC (Keyboard Controller) section is the brain of the motherboard. It monitors thermal sensors, handles the lid switch, and triggers the power-on sequence. When you press the laptop's power button, it pulls a specific pin on the EC low. The EC then sends an
These sections cover the connections for the screen (LVDS or eDP), the keyboard, the touchpad, and the various external ports. If a specific port or peripheral isn't working, the schematic will show which pins and traces to test.
To effectively use the LA-C781P schematic, you need to understand its primary sections: A. Power Input and Charging (DC-IN)
While the full PDF is proprietary, it is widely archived on technical forums and specialty repositories: