Rev 10 Schematic Top | Lad711p
This crucial analog center pin signal is interpreted directly by the Embedded Controller (EC). If the EC cannot read ADP_ID , the board blocks charging and power gating.
A full schematic for this board typically includes the following critical sections for troubleshooting: Block Diagram:
When reviewing the "LA-D711P Schematic Top," look for the following signals if the laptop is "dead": Located near the DC jack. Check PU301PU301 (Charger IC): Verifying input ( VDCcap V cap D cap C ) and output ( ACINcap A cap C cap I cap N Check BIOS Chip ( ): Located near the APU, verifying 3.3V on pin 8. 5. Where to Find LA-D711P Resources
In bench environments where an exact LA-D711P schematic variant is hard to source, engineers regularly cross-reference data using the LA-C801P schematic or the BDL50 LA-D704P file due to identical power generation topology. Power Distribution & Core Voltage Rails lad711p rev 10 schematic top
Have a specific question about a measurement on your LAD711P Rev 10? Refer to test points TP1-TP12 on the top schematic and check against the nominal values provided in the component list accompanying the diagram.
If VBUS is low or zero, check RV1 for cracking and LF1 for open windings. Do not overlook the thermistor (NTC) in series with the live wire.
3.3V): Verifies the power button signal successfully registers at the corresponding EC pin assignment. This crucial analog center pin signal is interpreted
This article explores the top side component layout, key power rails, and typical diagnostic steps found on the LAD711P schematics. 1. Introduction to the LA-D711P Platform
Located centrally, often prone to damage. Touchpad Connector: Situated below the keyboard connector.
The clock generator chip (CLK GEN) synthesizes base frequencies (100MHz, 33MHz, 48MHz) from a main 14.318MHz crystal. It distributes these clock signals to the CPU, PCH, and PCIe slots. Without a stable clock signal, the system will reset continuously or hang during POST. Display Outputs: LVDS and CRT The schematic defines how video data reaches the screen: Check PU301PU301 (Charger IC): Verifying input ( VDCcap
[DC Jack / Battery] ──> +19V (+DC_IN) ──> [First/Second MOSFETs] ──> +B (System Main Rail) │ ┌───────────────────────┬────────────────────────┬─────────────────┴────────────────┐ ▼ ▼ ▼ ▼ +3VALW / +5VALW +1.2V_DDR +1.0V_PCH +CPU_CORE (Always-On Rails) (Memory Power) (Chipset Core Power) (Processor Core) 1. The Primary Rail (+B / +19V)
: The areas near the touchpad connector and the audio jack are highly susceptible to trace oxidation if liquids spill onto the laptop keyboard.
Because this is a specific Compal board, you can often find the schematic diagram, boardview file ( .brd or .tvw ), and BIOS dumps in specialized forums. Provides the
: Inspect PD7 near the charger IC. If it is cracked or shorted to ground, swap it with any standard common-cathode dual Schottky diode from a donor scrap board.
: Turn off all power. Set your multimeter to resistance (Ohms mode) and measure from the main current sense resistor to ground.
