La-d401p — Schematic !free!

When repairing, you will likely spend time in these specific sections of the schematic: 1. DC-IN and Input Power (Page 3/4) This section handles the 19V input from the AC adapter.

The DC jack injects 19V into the board. This voltage passes through a protection fuse and two N-channel isolation MOSFETs. The charging IC (often an ISL88739 or BQ series) must output an or ACOK signal to the Embedded Controller (EC) to verify a valid power source is connected. If the gates of the entry MOSFETs do not receive their driving voltage, the +19V rail will stop at the first transistor. 2. Standby Rail Generation (+3VALW / +5VALW) la-d401p schematic

When looking at the block diagram of the LA-D401P, you can generally break it down into four main sections: When repairing, you will likely spend time in

Technicians use the LA-D401P schematic to troubleshoot power rail failures or communication issues between the CPU and peripherals. This voltage passes through a protection fuse and

Power enters through the DC jack and passes through protection diodes and two input isolation MOSFETs (usually PQ42 and PQ44 on this platform).

The LA-D401P is a high-density, ultra-thin motherboard designed by Compal for HP. Due to its slim form factor, most components are integrated directly into the board to save space. Processor Support : Typically features 8th Generation Intel Core i5/i7 processors (e.g., i7-8550U) soldered to the board. : Standard configurations often include 8GB or 16GB of LPDDR3 RAM , which is non-upgradable as it is soldered to the PCB. : Integrated Intel UHD Graphics 620 Storage Interface : Utilizes an M.2 NVMe SSD HP Support Community Schematic Breakdown

: Check the gate drive signal originating from the charging IC ( ISL88739 ). If the signal is absent, check the IC's VCC and ACDET pins. If the signal is present but the MOSFET won't open, replace the MOSFETs. 4. How to Read and Navigate the Schematic File