The Nuvoton or ENE chip listed here manages the keyboard, touchpad, and, most importantly, the power-on signal. If the power button does nothing, the schematic will show you which pin on this chip should trigger the start sequence. 4. Memory and CPU VRM
For component-level repair technicians, having access to the schematic diagram is essential for troubleshooting common board faults like "no power," "power but no display," and "liquid damage." 1. Board Overview and Specifications
The 10203-1 LA56 MB 48.4JW06.011 schematic is essential for repairing Lenovo G560/G460 laptops. Understanding the power sequencing—specifically how the 19V19 cap V 10203-1 la56 mb 48.4jw06.011 schematic
rPGA-989, supporting Intel Celeron, Pentium, and Core i3/i5/i7 (1st Gen) processors.
Windows 7, 8, 10 (32‑bit/64‑bit) and many Linux distros. The Nuvoton or ENE chip listed here manages
Here are the core specifications for the 10203-1 platform, based on the most common configurations:
Locate the input MOSFETs (usually labeled PQ or Q tags close to the DC jack input on the schematic). Check ceramic bypass filtering capacitors connected directly between VIN and Ground. A cracked ceramic capacitor is the number one cause of standard 19V shorts on this platform. Issue B: Missing Standby Voltages (+3VALW / +5VALW) Memory and CPU VRM For component-level repair technicians,
Signals appended with an asterisk or hashtag (e.g., PLTRST# or RESET# ) are active-low . They must drop to 0V to trigger their respective function, or remain at 3.3V to indicate a normal running state. Conclusion
Set your bench power supply to 19V with a low current limit (e.g., 500mA) when testing a board with a known short circuit. Use thermal imaging or the isopropyl alcohol evaporation method to locate the component heating up.
Follow the "Power On Sequence" chart to see which voltage rail should activate first.