F4901 1.1a 24v Schematic -

Complete Guide to Fuses on Laptop Motherboards: The Component

Use a multimeter to test the component labeled F4901. A blown fuse will show no continuity. Identify the Load:

R=Vin−VfIfcap R equals the fraction with numerator cap V sub i n end-sub minus cap V sub f and denominator cap I sub f end-fraction , the forward voltage of a standard green LED ( Vfcap V sub f ) is roughly , and the target current ( Ifcap I sub f f4901 1.1a 24v schematic

The voltage steps through F4901 to establish a safe, overcurrent-limited power node labeled as INVERTER_POWER or LCD_VDD_BL .

: When searching electronics distributors like Farnell or TME, ensure the replacement matches the physical packaging footprint, the 1.1A current rating , and holds a voltage threshold of at least 24V (higher ratings like 32V or 63V are safe to use as replacements, provided the amperage stays identical). Complete Guide to Fuses on Laptop Motherboards: The

If you cannot find the exact schematic, or you suspect the F4901 fuse has failed, here is a practical approach to diagnosing and fixing it, based on community-shared knowledge.

In typical 24V power supply designs, you will find the F4901 positioned: : When searching electronics distributors like Farnell or

Originates from Pin 2 of the F4901 fuse. This node delivers the current-limited voltage to downstream electronics.

Connect the positive rail of your power source to Pin 1 of the F4901.

When a laptop like the Acer Aspire 5560G experiences a "black screen" but still powers on, technicians often check the F4901 fuse for continuity. If this fuse is blown, it breaks the circuit for the screen's backlight.