La-e791p Rev 2.0 Schematic Diagram Online
The LA-E791P Rev 2.0 Schematic Diagram is not just a PDF file; it is a map of a complex electronic city. For a beginner, it looks like a mess of intersecting lines. For a seasoned technician, it is a narrative of what happened to the laptop.
If your gaming laptop just died, don't throw the motherboard in the trash. Locate the REV 2.0 diagram, order a flux pen and a multimeter, and start tracing. Whether it is a failed +1.05V_ME rail or a cracked BGA under the PCH, the answer lies in those 58 pages of circuitry.
Final Checklist for your search:
Happy repairing. May your voltages be stable and your soldering iron be clean.
Disclaimer: This article is for educational purposes. Always use proper ESD safety and verify your downloads with antivirus software. Modifying your laptop motherboard voids the warranty and carries a risk of fire or electrical shock.
The Compal LA-E791P Rev 2.0 (also known as CSL50/CSL52) is a motherboard schematic used primarily in HP 250 G6 and HP 15-BS series laptops. This document is an essential technical blueprint for hardware repair, detailing the power sequences, component layouts, and signal paths of the device. Technical Summary
The motherboard is designed by Compal Electronics and supports the following core hardware configurations:
Processor (CPU): Intel Sky Lake-U or Kaby Lake-U series processors.
Graphics (GPU): Integrated Intel HD Graphics or dedicated AMD Radeon R17M with DDR3L VRAM. Memory: Dual-channel DDR4 SO-DIMM slots.
Storage Interfaces: Supports both SATA (HDD/SSD) and PCIe (M.2 NVMe) interfaces. La-e791p Rev 2.0 Schematic Diagram
Power Management: Utilizes a multi-rail system, including critical power states like +VCC_CORE, +3VALW, and +5VALW. Key Schematic Sections
Block Diagram: An overview of how the CPU, PCH (Platform Controller Hub), and GPU interact with peripheral ports like USB, HDMI, and LAN.
Power Delivery Network (PDN): Detailed diagrams of voltage regulators (Buck converters) that step down the 19V adapter input to lower voltages like 1.2V (RAM) or 1.0V (CPU).
Signal Integrity: Pin-out definitions for the LVDS/EDP display connector, keyboard interface, and BIOS/EC (Embedded Controller) chips.
Security Notice: The document is marked as proprietary and confidential by Compal Electronics, containing trade secrets intended only for authorized service providers. Resources for Repair
If you are troubleshooting a "No Power" or "No Display" issue, these community-vetted resources can provide the specific Rev 2.0 files or guidance:
Downloads: Schematic and Boardview files are often hosted on enthusiast sites like GeekDais or The Tech Stall.
Troubleshooting Guides: Video walkthroughs on diagnosing specific rails like +VCC_CORE can be found on YouTube.
Community Support: Detailed discussions regarding BIOS dumps and power issues for this specific revision are active on the VLab forums. CSL50 LA-E791P Rev 2.0 Schematic | PDF - Scribd The LA-E791P Rev 2
The LA-E791P Rev 2.0 Schematic Diagram is an essential technical resource for repairing and diagnosing the CSL50/CSL52 motherboard, primarily found in laptops like the HP 250 G6 and HP 15-BS series. This engineering document from Compal Electronics details the hardware architecture, including power rails, signal paths, and component connections necessary for board-level troubleshooting. Key Technical Specifications The motherboard architecture typically includes:
CPU Support: Designed for Intel Sky Lake-U and Kabylake-U processors (e.g., i3-6006U). Memory: Support for DDR4 SO-DIMM memory.
Graphics: May feature integrated Intel HD graphics or a discrete AMD R17M GPU with DDR3L VRAM.
Storage Interfaces: Includes SATA and PCIe connections for hard drives and SSDs. Common Uses for the Schematic
Power Rail Diagnosis: Technicians use the diagram to trace power distribution, such as identifying faults in the +VCC_CORE or battery charging circuitry.
Component Identification: Providing specific part numbers and labels for ICs, MOSFETs, and connectors to ensure accurate replacement.
Signal Tracing: Mapping signals like BIOS, clock, and reset to troubleshoot "No Display" or "No Power" issues. CSL50 LA-E791P Rev 2.0 Schematic | PDF - Scribd
Based on the filename format, "LA-E791P Rev 2.0" refers to the motherboard schematic for a specific model of Acer Aspire E15 (likely the E5-571 or E5-531 series) or a similar Acer laptop generation using the Intel Bay Trail platform.
This is a compound document typically used by electronics repair technicians for board-level diagnostics. Below is a guide on how to read and navigate this specific schematic diagram. Happy repairing
Unlike consumer block diagrams, the La-e791p Rev 2.0 schematic uses net labels and cross-references. Example:
Use a PDF viewer with search and layer toggling if available. Many repair communities provide boardviews (.BRD) alongside the schematic, allowing component location on the physical PCB.
Symptom: Works on AC, but dies instantly when unplugged. The Fix: The SMBus (system management bus) lines to the battery are broken or the charging FET is shorted.
Through years of repair data, specific faults plague the REV 2.0 variant. Here is how the schematic becomes your weapon.
The La-e791p Rev 2.0 follows a structured DCDC power tree, typical for Intel U-series or H-series platforms. Key power stages documented in the schematic include:
| Rail Name | Voltage | Max Current | Controller IC (Typical) | |-----------|---------|-------------|--------------------------| | +VIN (DC-in) | 19.5V | 3.25-4.5A | BQ24780S (Charger) | | +3.3V_ALW | 3.3V | 2A | TPS51285 or SY8288 | | +5V_ALW | 5V | 3A | TPS51285 or SY8288 | | +VCC_CORE | 0.65-1.35V | 25A+ | NCP81215 + DrMOS | | +VCC_GT | 0.65-1.25V | 15A | NCP81215 (Phase 2) | | +1.8V_PCH | 1.8V | 1.5A | SY8286 | | +1.05V | 1.05V | 3A | SY8288 |
Notable feature: Rev 2.0 introduces a separate +VCC_SA (System Agent) rail, which in Rev 1.0 was derived from +1.05V. This change improves PCH stability under load.
If you are repairing this board, locate these specific pages in the PDF:
To effectively use the LA-E791P schematic, you need: