Everything begins at the DC jack. The raw charging voltage passes through the protective input dual-MOSFETs managed by the . Once the IC verifies that the incoming current and voltage are stable, it opens the gates to establish the primary system rail, usually designated as +V_B+ or +19V in the Rev 2.0 schematic. 2. The Always-On Standby Rails (+3VALW / +5VALW)
Finding a "better" schematic—one that is clear, searchable, and accompanied by a matching boardview—is crucial for navigating the tight, high-density circuits of this board. 1. Understanding the LA-E801P Rev 2.0 Compal LA-E801P
Improved clarity on how voltage moves through MOSFETs and inductors. lae801p rev 20 schematic better
If the 19V rail is shorted, the Rev 2.0 schematic helps identify the specific capacitor causing the failure to ground. 2. RAM and VDDQ Rails The motherboard uses DDR4 memory.
Check the +LCDVDD rail. If this is missing, the screen remains black even if the CPU is running. Expert Repair Tips for LA-E801P Rev 2.0 Everything begins at the DC jack
: If you are troubleshooting power issues (like "no lights"), the Elvikom Forum has active threads where technicians share specific voltage measurements and component identifications for this exact revision. Technical Specifications (CSL50/CSL52) The LA-E801P board typically features: Platform : Intel Sky Lake-U or Kaby Lake-U (7th Gen).
Improved: AC_L ---[Fuse]---[Varistor]---[CM Choke (20mH)]---[Bridge]---[Bulk Cap]---[X-cap 0.47uF] Understanding the LA-E801P Rev 2
Many "no power" issues are solved by flashing the BIOS, as the EC communicates directly with it. Where to Find the Schematic Telegram Channels: Often listed under schematics|boardviews| ARCHIVE Technical Forums: provides detailed, solved threads for this exact revision. LA-E801P document
Specific mapping for input MOSFETs (often causing 19V rail failure). 3.3V/5V Rail Analysis: Enhanced tracing for the PWM IC and coil voltages. Boardview Compatibility: Matches better with boardview software, allowing faster component location. Key Power Sequence and Common Repairs
Compal regularly alters component layouts between revisions. Using a Rev 1.0 schematic on a Rev 2.0 board can result in looking for components that do not exist, or reading incorrect resistor values.