Ps42419ha Schematic Work -

Dual-wound inductors block common-mode noise generated by the internal high-frequency switching FETs, preventing it from polluting the local power grid. Phase 2: Active Power Factor Correction (PFC)

Ensure the exposed pad (EP) under the IC is tied to the analog and power ground symbols in the schematic, which tells your PCB software to create vias for heat dissipation. Transitioning from Schematic to PCB Layout

: If the fan does not spin or the unit shuts down immediately when load is applied, the 3.3V sense line

It also carries several interchangeable OEM part numbers: . ps42419ha schematic work

Demystifying the HP PS-4241-9HA Go to product viewer dialog for this item.

The MOSFET chops the pulsating DC at high frequency (typically 60kHz–100kHz). This action charges a large, high-voltage electrolytic capacitor (usually rated for 420V or 450V). This reservoir capacitor maintains a steady 380V to 400V DC bus , completely isolated from input AC voltage fluctuations. Phase 3: The Standby & Pulse Width Modulation (PWM) Stages

Produces stable 12V DC output for the PC/Server components. Common Failure Modes (Troubleshooting) Demystifying the HP PS-4241-9HA Go to product viewer

(e.g., dead, fan spins briefly, no 5V)? Do you have a multimeter to test for voltage?

Using the board layout, you can recreate a rudimentary schematic. Look for the (4 pins). The transistor side (pins 1-2) is the primary . The LED side (pins 3-4) is the secondary . If the secondary side is shorted, the LED stays on, the transistor conducts, and the primary shuts down.

Choose an inductor with a saturation current rating ( ISATcap I sub cap S cap A cap T end-sub This reservoir capacitor maintains a steady 380V to

The HP PS-4241-9HA is designed for robust performance with the following specs: 100-240V Total Output Power: 240 Watts Input Current: 4 Amps Typical Efficiency: > 88% Conclusion

The PS-4241-9HA is a proprietary 240-watt power supply unit (PSU) manufactured by HP for use in its small form factor (SFF) desktops, particularly within the Compaq and Elite series. Given that schematics for proprietary PSUs like this are rarely made public, the information in this guide has been compiled from hands-on technician reports and hardware documentation to serve as an essential resource for repair and troubleshooting.

One successful repair documented on involved exactly this technique: