Rev 2.0 often corrects mislabeled capacitors and resistors found on Rev 1.0, specifically around the charging IC and CPU VRM (Voltage Regulator Module).
If you have a dead LA-E801P Rev 2.0 board on your bench, follow this systematic diagnostic approach using your schematic:
Several websites specialize in collecting and selling or providing free access to technical documentation.
Search for LA-E801P Rev 2.0 schematic PDF on reliable electronics repair forums like Badcaps or Telegram schematic groups.
Understanding this motherboard layout speeds up the troubleshooting process for common power rails, charging system failures, and display anomalies. Motherboard Overview & Specifications Compal LA-E801P Rev 2.0 Go to product viewer dialog for this item. lae801p rev 20 schematic better
Given the limited online presence of this component, standard search methods may not yield immediate results. Here is a systematic approach to locating the schematic:
Technicians frequently use the LA-E801P Rev 2.0 schematic to resolve several recurring motherboard faults:
| Feature | Rev 10 (Legacy/Baseline) | Rev 20 (Current/Optimized) | Verdict | | :--- | :--- | :--- | :--- | | | Single-stage regulation, high heat dissipation near logic ICs. | Multi-stage distributed regulation with thermal relief zones. | Rev 20 is Superior (Thermal Management) | | Decoupling Strategy | Generic 100nF bulk capacitors. | High-frequency ceramic arrays near VCC pins, optimized ESR. | Rev 20 is Superior (EMI/EMC Performance) | | Logic Glue | Discrete gates (74HC series) creating propagation delays. | Consolidated into CPLD/FPGA or optimized single-gate logic. | Rev 20 is Superior (Signal Integrity) | | Connector Interface | Standard pin headers; risk of reverse polarity. | Polarized locking connectors with ESD protection clamping. | Rev 20 is Superior (Field Reliability) | | Schematic Readability | Nets crossing, ambiguous ground symbols. | Logical flow (Left-to-Right), distinct Ground/Power planes defined. | Rev 20 is Superior (Serviceability) |
[DC Jack In: +19V] ──> [First/Second Mosfets] ──> [Charging IC: BQ24780S] │ ┌────────────────┴────────────────┐ ▼ ▼ [+3VALW Always-On] [+5VALW Always-On] 1. The DC-In and Charging Circuit (BQ Series) Here is a systematic approach to locating the
If the laptop shows no signs of life, check the input MOSFETs. A common issue is a shorted component causing the input voltage to enter a protection loop, resulting in a blinking charging light Elvikom .
: Technicians report that 3.3V/5V power rail issues are common on this board; Rev 2.0 schematics provide the correct test points and resistance values (e.g., specific 7Ω readings on source sites) to identify shorts.
Locate the PWM controller responsible for +3VALW and +5VALW . Ensure the IC is receiving its main input voltage ( VIN ) and outputting its internal linear regulator voltages ( +3VLP / +5VLP ).
Document hosts like Scribd's Compal Schematics Directory frequently store complete 59-page engineering diagrams for the CKL50 series. a black screen
is a highly integrated motherboard built around Intel Core architectures (typically 6th or 7th Generation processors like the i7-7500U) paired with DDR4 memory. Depending on the specific configuration, it features either Unified Memory Architecture (UMA) integrated graphics or discrete AMD Radeon graphics. Specification Details HP Pavilion 15-BS Series, HP 250 G6 Notebook CPU Architecture Intel Skylake / Kaby Lake U-Processor Lineup RAM Configuration Dual-Channel DDR4 SO-DIMM slots (1.2V) Primary Power Rail +19.5V DC-In (+PWR_SRC) Core Architecture and Power Rail Breakdown
With steady hands, Elias began to work. He didn't just follow the lines; he felt them. He replaced a blown MOSFET, rerouted a signal line that the previous engineers had botched, and soldered a tiny jumper wire between the 3V-always rail and the hidden wake-up pin. "Ready?" Elias asked, more to the board than to Kael.
The (also known as the Compal CSL50/CSL52) is the hardware backbone for millions of mid-range laptops worldwide, most notably the highly popular HP 15-BS series . When a laptop like this suffers from a sudden power failure, a black screen, or a failure to post, a high-quality schematic diagram becomes the most important tool on a technician’s workbench.
The is a critical resource for technicians repairing HP 15-BS series laptops. While the Rev 1.0 version is more widely available online, finding the specific Rev 2.0 diagram is essential for troubleshooting newer iterations of this motherboard that may feature updated power rails or component layouts. Core Technical Specifications LA-E801P motherboard
The Rev 20 schematic includes specific notes for the PCB layout designer that were absent in previous versions: