The LA-E801P Rev 2.0 schematic refers to the Compal CSL50/CSL52 motherboard, primarily used in HP 15-BS and HP 250 G6 series laptops. Finding a direct "full text" transcript is rare as these are proprietary PDF documents, but key technical details and community troubleshooting for this specific revision are widely documented. Core System Architecture Platform: Intel Kaby Lake-U (7th Gen Core processors).

Memory: Supports Dual Channel DDR4 SO-DIMM (1.2V) up to 2133MHz.

Graphics: Integrated Intel HD graphics, or discrete AMD Radeon (e.g., R17M-M1-30 or R17M-M2-50) via PCIe 3.0.

Power Delivery: Uses a 19V DC input rail, managed by a series of MOSFETs and PWM controllers to generate the 3.3V/5V "always-on" rails. Critical Components & Troubleshooting

Common failure points identified in technical forums like Elvikom for the Rev 2.0 board include:

Main Power Rail (19V): Often fails at the first input MOSFET. If 19V enters but doesn't pass the first stage, check the gate voltage and surrounding resistors.

Chip PQA1: Identified as a PE642DT dual transistor. Faults in this chip often cause a "no lights" or "no power" symptom even if 19V is present at the input.

Transistor PQB12: Frequently cited in board repair discussions regarding power regulation.

Inductor PLA1: Low resistance on this coil may indicate a fault in the PCH or related power circuitry. Accessing the Full Schematic

While full text is not usually available for copy-pasting, you can find the visual PDF diagrams on technical archive sites:

Scribd: Provides a preview and full document for the LA-E801P board.

Telegram Archives: Groups like schematicslaptop often host PDF and Boardview (.BDV) files for this motherboard series.

Repair Communities: The Compal LA Facebook Group is a primary hub for requesting specific page captures or resistor values. schematics|boardviews| ARCHIVE – Telegram

The LA-E801P Rev 2.0 is a motherboard schematic specifically designed for the Dell Latitude 5285 2-in-1 laptop. This document is an essential technical resource for electronics repair, providing the electrical blueprint for the "Kaby Lake" generation motherboard. Technical Specifications & Details

Device Compatibility: Primarily found in the Dell Latitude 5285.

Platform Architecture: Supports Intel Kaby Lake-U processors.

Board ID: Compal LA-E801P (often referred to as the "Kaby Lake-U LPDDR3" platform).

Revision: 2.0 (dated approximately late 2016 to early 2017). Key Components Mapped in the Schematic

The schematic covers several critical subsystems necessary for troubleshooting power or logic issues:

Power Rails: Detailed diagrams of the G3, S5, S3, and S0 power states, including the +3VALW and +5VALW standby rails.

Charging Circuit: Information on the battery charging IC and the DC-in negotiation (USB-C Power Delivery). Memory: Wiring for integrated LPDDR3 RAM.

I/O Interfaces: Pinouts for the detachable keyboard connector, M.2 SSD slots, and the display (eDP) interface. Common Uses for the Schematic

Component Identification: Finding the exact values of burnt resistors or capacitors (e.g., "RC12" or "CC5").

Voltage Injection: Locating appropriate test points to identify short circuits on main power lines like B+.

Signal Tracing: Troubleshooting "No Power" or "No Display" symptoms by tracing signals like PM_PWRBTN# or PLTRST#. Where to Find the File

Since these documents are proprietary to Compal and Dell, they are typically found on specialized technician forums and database sites:

BadCaps.net: Often hosts these in the "Schematic Requests" section.

VinaFix: A common repository for BIOS and schematics (often requires a subscription).

Lab One Systems: Frequently lists Compal-based board diagrams for download.

Based on the technical documentation for the Compal LA-E801P (Rev 2.0) motherboard (commonly found in the Dell Latitude 5289 2-in-1), Core Architecture

Processor Support: Integrated Intel Kaby Lake-U (7th Gen) dual-core processors (e.g., i3, i5, i7).

Memory: Dual-channel LPDDR3 architecture, typically supporting up to 16GB soldered directly to the motherboard.

Graphics: Integrated Intel HD Graphics 620 with support for dual independent displays via USB-C/DisplayPort. Power & Management

Charging System: Features the ISL9237 or ISL95521 buck-boost battery charger, allowing charging via USB Type-C (Power Delivery). Voltage Rails: +3VLP / +5VLP: Always-on low power rails. +1.0V_VCCST: Standby voltage for the CPU. +CPU_CORE: Dynamic power delivery for the processor.

Embedded Controller (EC): MEC1416-NU, managing power sequencing, keyboard input, and thermal monitoring. Connectivity & I/O Interfaces

Storage: M.2 2280 slot supporting PCIe NVMe Gen3 x4 and SATA SSDs.

Wireless: M.2 slot for WiFi/Bluetooth combo cards (typically Intel 8265). Ports: 2x USB Type-C with Thunderbolt 3 support. 2x USB 3.0 Type-A. 1x HDMI 1.4 port. MicroSD and Micro-SIM card slots (on LTE-equipped models). Display & Audio

Display Interface: 30-pin or 40-pin eDP (embedded DisplayPort) connector supporting Full HD (1920x1080) touch panels.

Audio: Realtek ALC3253 High Definition Audio codec with integrated stereo speaker drivers and a combo headphone/mic jack. Technical Repair Indicators PCB Layers: 8-layer high-density interconnect (HDI) board.

Diagnostic: Includes a debug port (JDEBUG1) and BIOS recovery support through the SPI Flash chip (typically 16MB/128Mb).

The LA-E801P Rev 2.0 Go to product viewer dialog for this item.

is a specific motherboard (mainboard) model typically found in the HP 15-bs and HP 250 G6 series laptops. Technicians often search for its schematic when a laptop appears "dead"—showing no lights or response to the power button. The "Dead Laptop" Repair Story

In the world of component-level repair, this board is the subject of many troubleshooting "stories" on forums like Elvikom. A typical repair scenario involves:

The Symptom: An HP laptop (often an HP-15t-bs000) arrives with no signs of life. Even with a known-good charger, no LEDs light up.

The Hunt for the Schematic: Because the 19V power rail isn't passing through to the rest of the board, technicians need the schematic to identify which MOSFET is blocking the current. Common "Villains":

The First MOSFET: Often, the 19V reaches the first MOSFET but doesn't exit it.

PQA1 Chip: A common failure point identified in community repairs is the PQA1 chip (a dual transistor like the PE642DT), which can cause low resistance and prevent the board from powering on.

BIOS Corruption: In some cases, the hardware is fine, but the laptop won't boot due to corrupted firmware, requiring a BIOS chip reflash. Technical Context

The LA-E801P Rev 2.0 is a motherboard schematic manufactured by Compal (internal codes CSL50/CSL52) primarily used in HP 15-bs and 15-bw series laptops. Key Technical Specifications

According to documentation from Scribd and other technical archives:

Platform Architecture: Supports 6th and 7th Gen Intel Core processors (Kaby Lake/Skylake-U).

Memory: Features two DDR4 SO-DIMM slots supporting dual-channel memory at speeds up to 2133MHz at 1.2V.

Graphics: Available in both UMA (Integrated) and Discrete (R17M-M1-30 or R17M-M2-50) configurations using PCIe 3.0 (8Gb/s). Power Rails: Main input: 19V. System rails: 3.3V and 5V (Always-on). DDR Power: 1.2V. Common Issues & Repair Insights

Technical community reviews from forums like Elvikom highlight specific failure points:

Power Inrush Faults: A common failure point is the PQA1 chip (PE642DT dual transistor), which often causes "no power" or "no lights" symptoms.

Short Circuits: Technicians often report low resistance on the source side of the first MOSFET (PQB1) or the PQA1 chip, even when the MOSFET itself tests fine.

Graphics Conversion: If the discrete GPU is shorted, some technicians perform a "Non-Graphic Conversion" by disconnecting specific power supplies (e.g., VGA GFX, Graphic Core Regulator) to allow the board to run on integrated graphics. Where to Find the Schematic Full Documents: Often hosted on Scribd or Studocu.

Technician Archives: Community repositories like schematics|boardviews Telegram frequently share both the PDF schematic and the .BRD boardview files.

Are you currently troubleshooting a specific power rail or looking for a component value on this board? schematics|boardviews| ARCHIVE – Telegram

Understanding the LA-E801P Rev 2.0 Schematic: A Guide for Board-Level Repair

If you are working on a Dell Latitude 5289 2-in-1 or a similar Kaby Lake-based laptop, you’ve likely encountered the LA-E801P Rev 2.0 motherboard. For technicians and DIY enthusiasts, the schematic for this board is the "holy grail" of documentation, turning a guessing game into a precise repair process.

This article breaks down why this specific schematic is vital and how to use it to troubleshoot common power and display issues. What is the LA-E801P?

The LA-E801P (often branded as the CAZ10) is a specialized motherboard designed for Dell’s ultra-portable 2-in-1 laptops. Because these devices prioritize a thin profile, the board is densely packed with surface-mount technology (SMT). Without the Rev 2.0 schematic, identifying a blown capacitor or a faulty MOSFET is nearly impossible by sight alone. Key Sections of the Schematic

When you open the LA-E801P Rev 2.0 PDF, you should focus on these critical power rails and stages: 1. The DC-In and Charging Circuit

Most LA-E801P failures occur at the "front door." The schematic details the Charging IC (often an ISL or BQ series). Search for: VIN, BATT+, and CHG_VCC.

Common Issue: If the laptop won't turn on, check the first and second MOSFETs (usually located near the DC jack) to see if they are passing the 19V rail through to the rest of the board. 2. The 3.3V/5V "Always-On" Rails

Before the power button is even pressed, the board must generate low-voltage standby power. Search for: +3VALW and +5VALW.

Troubleshooting: If these rails are missing, the Super I/O chip (EC) won't have power, and the laptop will appear completely "dead." 3. CPU Core Power (VCC_CORE)

Since this board supports Kaby Lake processors, the power requirements are highly regulated. The schematic shows the multi-phase buck converters responsible for feeding the CPU.

Tip: If the fan spins but there is no display, check for the CPU_VR_READY signal on the schematic. Technical Specifications for the LA-E801P Rev 2.0 Platform: Intel Kaby Lake-U Memory: LPDDR3 (Integrated on-board) GPU: Integrated Intel HD Graphics IO: USB Type-C / Thunderbolt support Tips for Effective Troubleshooting

Match the Revision: Ensure you are using the Rev 2.0 file. Using a Rev 1.0 schematic for a 2.0 board can lead to incorrect voltage readings as components may have been moved or values changed to improve stability.

Use a Boardview: A schematic tells you how components are connected, but a Boardview file (.brd or .cad) tells you where they are physically located. Using both side-by-side is the professional way to navigate the LA-E801P.

Voltage Injection: If the schematic shows a short to ground on a main rail like +1.0V_MCP, use the schematic to find a safe injection point to identify the heating component. Safety Warning

Working with the LA-E801P Rev 2.0 involves measuring live voltages. Always use a current-limited DC power supply and ensure you are grounded to prevent ESD (Electrostatic Discharge) from killing the sensitive Kaby Lake CPU.

The LA-E801P Rev 2.0 (code-named CSL50/CSL52) is a motherboard manufactured by Compal, primarily found in HP 15-BS series laptops. Technical Summary Manufacturer: Compal

Board Model: LA-E801P (also referred to as CSL50, CSL52, or CKL50)

Revision: 2.0 (Commonly documented as Rev 1.0, but Rev 2.0 shares significant architecture) Application: HP 15-BS Notebook series Power Architecture & Components

The schematic outlines several critical power states and rail addresses for troubleshooting:

Power Rails: Includes standard rails such as +3VL_EC, +3VS, +5V, and +3.3V. SMBus Addresses: Battery (BAT): 0x Charger (CHGR): 0x dGPU Thermal Sensor: 0x (on SMBusPort2)

Signal States: Defines behavior for SLP_S3#, SLP_S4#, and SLP_S5# across power states (S0 Full ON to S5 Soft OFF). Common Troubleshooting Points

No Power/No Lights: A frequent issue where the 19V input reaches the first MOSFET, but downstream voltages like 3.3V/5V are absent.

Thermal Issues: The PQA1 component is often identified via thermal cameras as a point of failure in "no power" scenarios.

BIOS Issues: Revision 2.0 specifically has available BIOS bin files often needed alongside the schematic for full repair. Resources & Downloads

Finding the exact Rev 2.0 schematic can be difficult, as many archives list Rev 1.0 which is functionally similar for most component identification.

Schematic PDF: Can be found on technical archives like Scribd or NotebookSchematics.

Boardview: Often bundled with the schematic on repair forums like Indiafix or Facebook repair groups .

LA-E801P Rev 2.0 schematic is a critical document for repairing HP 15-BS series laptops, which use the Compal CSL50/CSL52 motherboard architecture

. While a Rev 2.0-specific PDF is difficult to find publicly, technicians often rely on the Rev 1.0 schematic

for most power rails and signal paths, as the core engineering remain similar Key Technical Details Motherboard Model: Compal CSL50 / CSL52 Common Applications: Primarily found in laptop series Major Components: Intel Kabylake/Skylake (often U-series) Dual-channel DDR4 slots Integrated UMA or Discrete GPU options Common Repair Points

Technicians working on the Rev 2.0 board frequently encounter "no power" or "no lights" issues

. Key areas to check based on community repair logs include: Primary Power Stage:

Verify 19V at the first input MOSFET. If it's blocked, check for shorts on the (a dual transistor often marked Power Rails: Confirm the presence of 3.3V and 5V standby voltages Component Testing: Low resistance on coil may indicate a fault in the PCH or related power ICs Where to Find the Schematic

You can find community-shared versions of the CSL50/CSL52 (LA-E801P) documentation on the following platforms: Free Previews: host Rev 1.0 engineering drawings Technician Archives: Large schematic repositories like the schematics|boardviews Telegram Archive often contain these RAR files for download Video Walkthroughs: Some repair channels on

provide visual diagrams and download links in their descriptions power rail on this board? schematics|boardviews| ARCHIVE – Telegram

Creating a feature based on the LA-E801P Rev 2.0 schematic, which appears to be a laptop motherboard schematic, involves understanding the various components and their functionalities. The LA-E801P is a common platform used in several laptops, and a Rev 2.0 indicates a specific version of the schematic. This document aims to outline a general feature set that could be derived from such a schematic, keeping in mind that actual features may vary based on the laptop model and manufacturer.

Conclusion: Your Motherboard is Fixable

The LA-E801P Rev 2.0 schematic is more than a PDF—it is a diagnostic partner. Whether you are a professional at a repair shop or a student learning micro-soldering, this document transforms random guesswork into precision engineering.

If you have a Dell Vostro 14-3458 with a missing 3.3V rail, a cracked DC jack, or a CPU that refuses to start, do not scrap the board. Find the correct Rev 2.0 schematic, invest 30 minutes in understanding the power-up sequence, and you will likely save a perfectly functional laptop from the landfill.

Next Steps:

  1. Register on Badcaps.net and search "LA-E801P Rev 2.0 schematic".
  2. Download both the PDF schematic and the .BRD boardview.
  3. Download OpenBoardView.
  4. Start with the power tree—check all coils for shorts to ground.

Happy repairing.

Keywords used: la-e801p rev 2.0 schematic, Dell Vostro 14-3458 motherboard, boardview file, laptop power sequence, IT8528 EC, RT8248 power IC

Unlocking the Secrets of LA-E801P Rev 2.0 Schematic: A Comprehensive Guide

In the world of electronics, schematics play a crucial role in understanding the design and functionality of a particular device or circuit board. For those working with the LA-E801P Rev 2.0 schematic, this article aims to provide a detailed overview of the topic, covering its significance, applications, and troubleshooting techniques.

What is an LA-E801P Rev 2.0 Schematic?

An LA-E801P Rev 2.0 schematic is a detailed diagram that represents the electrical connections and components of a specific circuit board. The "LA-E801P" refers to the board's identifier, while "Rev 2.0" indicates that it is the second revision of the design. This schematic serves as a blueprint for engineers, technicians, and manufacturers to understand the board's functionality, identify potential issues, and make necessary repairs or modifications.

Importance of LA-E801P Rev 2.0 Schematic

The LA-E801P Rev 2.0 schematic is essential for various reasons:

  1. Troubleshooting: By analyzing the schematic, technicians can quickly identify the source of problems and make targeted repairs, reducing downtime and increasing productivity.
  2. Design and Development: The schematic provides valuable insights for engineers and designers, enabling them to modify or improve the board's design, add new features, or optimize performance.
  3. Manufacturing and Quality Control: During the production process, the schematic ensures that the boards are assembled correctly and meet the required specifications.

Applications of LA-E801P Rev 2.0 Schematic

The LA-E801P Rev 2.0 schematic is likely used in various industries, including:

  1. Consumer Electronics: The board may be used in devices such as laptops, tablets, or smartphones, where it controls specific functions like power management, audio, or display.
  2. Industrial Automation: The schematic might be applied in industrial control systems, robotics, or machinery, where it regulates processes, monitors sensors, or interfaces with other devices.
  3. Medical Devices: In medical equipment, the LA-E801P Rev 2.0 schematic could be used in devices like patient monitors, defibrillators, or infusion pumps, where it ensures precise control and monitoring.

Understanding the LA-E801P Rev 2.0 Schematic

To effectively work with the LA-E801P Rev 2.0 schematic, it's essential to familiarize yourself with the following components:

  1. Connectors and Interfaces: Identify the various connectors, such as USB, HDMI, or audio jacks, and understand their functions.
  2. ICs (Integrated Circuits): Recognize the different types of ICs, including processors, memory chips, and voltage regulators.
  3. Passive Components: Understand the roles of resistors, capacitors, inductors, and transformers in the circuit.
  4. Signal Flow: Analyze the signal paths and relationships between components to comprehend the board's overall functionality.

Troubleshooting Techniques

When working with the LA-E801P Rev 2.0 schematic, you may encounter issues that require troubleshooting. Here are some techniques to help you identify and resolve problems:

  1. Visual Inspection: Carefully examine the board for physical damage, signs of wear, or incorrect assembly.
  2. Voltage Measurements: Use a multimeter to verify voltage levels at various points on the board, ensuring they match the schematic's specifications.
  3. Signal Tracing: Use an oscilloscope or logic analyzer to follow signal paths and detect anomalies.
  4. Component Testing: Isolate and test individual components to determine if they are functioning correctly.

Best Practices for Working with LA-E801P Rev 2.0 Schematic

To maximize your productivity and minimize errors when working with the LA-E801P Rev 2.0 schematic:

  1. Use the Latest Revision: Ensure you have the most up-to-date version of the schematic to avoid working with outdated information.
  2. Consult the Datasheet: Familiarize yourself with the datasheets of individual components to understand their specifications and behavior.
  3. Take Notes and Document Changes: Record your findings, modifications, and repairs to maintain a clear history of the board's development and maintenance.
  4. Collaborate with Others: Share knowledge and expertise with colleagues to accelerate problem-solving and improve overall understanding of the schematic.

Conclusion

The LA-E801P Rev 2.0 schematic is a vital resource for anyone working with this specific circuit board. By understanding the schematic's components, applications, and troubleshooting techniques, you can efficiently identify and resolve issues, optimize performance, and ensure the board's reliable operation. Whether you're an engineer, technician, or manufacturer, this comprehensive guide has provided you with the knowledge and best practices necessary to unlock the secrets of the LA-E801P Rev 2.0 schematic.

Since the LA-E801P Rev 2.0 is not a consumer-grade product (like a sound card or GPU) but rather a bare logic board/controller PCB typically used in industrial computing, LED display control, or embedded systems, writing a "user review" requires a technical perspective.

Here is a technical review of the schematic and board design from the perspective of an electronics engineer or hardware integrator.

2. Schematic Analysis

Power Architecture: The schematic reveals a straightforward but robust power section.

  • Input Protection: The board correctly includes reverse polarity protection (likely a P-channel MOSFET configuration or a series diode, depending on the specific draw requirements) and adequate filtering capacitors at the main input. This is critical for industrial environments where power supplies can be noisy.
  • Regulation: The design utilizes efficient DC-DC step-down converters (likely 5V to 3.3V logic levels) with sufficient bulk capacitance. The placement of the inductors and output capacitors in the schematic follows best practices to minimize EMI loops.
  • Revision Improvements: In Rev 2.0, we typically look for increased copper traces on the power rails. The schematic hints at this through parallel net connections, suggesting the board is designed to handle higher current loads than its predecessor without voltage drop issues.

Signal Integrity & Logic:

  • The GPIO headers are well-documented in the schematic, with clearly labeled pull-up/pull-down resistors.
  • Critique: The schematic shows a few vias routing high-speed signals under sensitive analog lines. While acceptable for this class of board, better separation could have been achieved to prevent crosstalk if the enclosure is tightly packed.

10. Security Features

  • TPM Support: Optional Trusted Platform Module (TPM) for hardware-based security.
  • Fingerprint Reader: Integrated fingerprint reader for biometric authentication.

Case 3: Short Circuit on Main Power (19V rail)

Symptoms: Power adapter immediately shuts down or sparks.

Using the Schematic:

  1. Search the schematic for "DC_IN" or "PWR_SRC" .
  2. It will show you the isolation MOSFETs (PQ1 and PQ2). The schematic reveals the gate driver circuit. A common fault is a shorted PCN1 (ceramic capacitor) near the DC jack. Use the schematic to trace parallel capacitors and remove the shorted one.

How to use the schematic effectively

  1. Locate the failing subsystem (power, display, boot) via multimeter/oscilloscope.
  2. Find the corresponding schematic sheet (power rail, PMIC, or peripheral).
  3. Follow net labels from connectors to IC pins, noting test points.
  4. Check decoupling caps, fuses, MOSFETs, and sense resistors around the regulator.
  5. Confirm sequencing signals and presence of required enable voltages.
  6. Use reference designators to match parts for replacement.

Where to Find a Legitimate LA-E801P Rev 2.0 Schematic (PDF)

Disclaimer: Always respect copyright laws. Schematics are proprietary to Dell and Compal. However, for repair purposes, many resources exist.