Try our new boardview, bios, & schematic search. Over 1.3 million files for download! CSL50 LA-E791P Rev 2.0 Schematic | PDF - Scribd
: If you find a true short circuit (near 0 ohms) on a high-voltage rail like +19V , set your lab bench power supply to a safe, low voltage (e.g., 1V) with a current limit of 1A to 2A.
The LA-E791P motherboard integrates several highly complex subsystems onto a single PCB. A high-quality schematic breaks this architecture down into digestible, interconnected blocks:
Check if the 19V passes the entry MOSFETs (PQB1, PQB2). lae791p rev 20 schematic better
The "Rev 20" in your search query is almost certainly a variant of , which is the most common version for this board. Visually confirming "REV: 2.0" will ensure you are looking for the correct documentation.
If you could provide more context or information about what you're trying to achieve or what specific aspects of the schematic you're interested in, I'd be happy to try and help further.
Essential for tracing the 19V primary rail and identifying where power distribution fails. Voltage Regulation Modules (VRM): Try our new boardview, bios, & schematic search
: If the laptop turns on but has no display, troubleshoot the No +VCC_CORE issue
: Multi-stage buck converter system generating +19V (VIN), +3VALW , +5VALW , +1.2V_DDR , and variable VCC_CORE. Why the LA-E791P Rev 2.0 Schematic is Better
: Compal frequently updates layouts during manufacturing cycles. Ensure your document header explicitly specifies Rev 2.0 or Rev 1.0 depending on the identifier etched directly onto the laptop motherboard surface to avoid tracking non-existent test points. Visually confirming "REV: 2
If these rails are missing, check the PWM controller ( PU401cap P cap U 401 ), MOSFETs, and inductors ( PL401cap P cap L 401 PL402cap P cap L 402 4. CPU and GPU Power Rails
Check for +19V at the drain of the second input MOSFET. Verify the IC gate drive voltage. Dual PWM Standby Controller IC / EN signals
If a short circuit exists down-line, the charging IC pulls down the gate voltage on these entry MOSFETs, turning them off and dropping your primary +19V rail to nearly zero. 2. The Always-On Standby Rail ( +3VALW and +5VALW )
Detailed pin assignments for HDMI, keyboard, and audio processing. You can find the full schematic via Scribd or Google Drive . CSL50 LA-E791P Rev 2.0 Schematic | PDF - Scribd