Lad711p Rev 10 Schematic: Top

Essential for DDR4 memory and the PCH logic.

The Dell Latitude 3480 and 3580 models are built on the Wistron Tiger-S (LAD711P) motherboard. For technicians and hobbyists, the "Rev 1.0" schematic is the roadmap required to navigate hardware failures, power sequencing issues, and component-level diagnostics.

Generated by the TPS51225R (or similar) controller. These must be present before the laptop can trigger the power-on sequence. lad711p rev 10 schematic top

By combining the LAD711P Rev 1.0 schematic with a multimeter and oscilloscope, you move from "parts swapping" to precision engineering, significantly increasing the success rate of Dell Latitude repairs.

The high-current rail supplying the Intel Kaby Lake or Sky Lake processor. Common Failure Points on the LAD711P Rev 10 Essential for DDR4 memory and the PCH logic

If all voltages are present but there is no display, verify that each regulator is sending a PGOOD signal to the EC.

Often an ISL88739. If the laptop runs on battery but won't charge, or vice versa, this is the primary component to inspect. Generated by the TPS51225R (or similar) controller

Measure the resistance on all large grey inductors (coils). Low resistance on 3.3V or 5V rails usually indicates a dead PCH or a shorted decoupling capacitor.