Laptop Motherboard Repair with Schematics Course

Explore the laptop power sequence to troubleshoot and repair motherboard power circuits, including MOSFETs, adapter, battery, and rail generation from 19 volts down to 2.5, 1.5, and RAM voltages.

Learn to read the laptop motherboard schematic for the 19v power rail, tracing from the dc power jack through the inductor, capacitors, diodes, and two mosfets with gate signals.

Analyze the 3v/5v system power rail in laptop motherboards, detailing power management, mosfets, inductors, and filters that generate +5v and +3v from a higher input.

Explore the charge circuit on a laptop motherboard, including the DC jack near power management, inductor, and MOSFETs. Trace diodes, capacitors, regulators, and sense resistors in the power path.

Examine the cpu power management circuit on the motherboard, focusing on two channels with mosfets and inductors, capacitors, and diodes that generate cpu voltages and provide protection.

Learn how the +vccp system power circuit generates the processor’s 2.5-volt +vcp rail, with mosfets, inductors, capacitors, and test points for diagnosing faults.

Troubleshoot and verify a 2.5-volt processor power rail on a motherboard, using q24 ic, q25 diode, capacitors, resistors, and enable and control signals.

Acquire the 0.9-volt Vtt for RAM from a 1.8-volt source, using capacitors and enable signals, and diagnose missing 0.9 V by checking 1.8 V, 5 V, and enable lines.

Examine the thermal and fan controller circuit on a laptop motherboard, showing how processor temperature uses D-plus and D-minus signals to determine fan speed via a transistor and fan connector.

Learn to read schematics and track signals and voltages from the 19-volt power path through capacitors, inductors, and MOSFETs, using a multimeter with a buzzer for continuity checks.

Analyze motherboard architecture, including inductors, capacitors, and mosfets driving power rails from 19 and 90 volts to 3, 5, 1.5, and 1.8 volts, plus block diagrams and power sequencing.