The PS-4241-9HA is a proprietary 240W power supply used by HP in their SFF desktop line. It's important to correctly identify the unit before any repair or replacement. You can do this by checking the label on the unit or cross-referencing the part numbers listed below.
The PS-4241-9HA is a robust unit but is susceptible to age-related component failure, specifically in the standby IC and secondary diodes. By focusing on the TNY279PG and the Schottky rectifiers on the schematic top , many of these units can be effectively repaired rather than replaced.
: The line input begins with a standard time-delay glass fuse alongside an NTC thermistor utilized for inrush current protection.
This power supply is known to fit tight cases where space is a premium and plays a key role in maintaining stable operation in office or home environments. ps42419ha schematic top
is structured around a topology utilizing active Power Factor Correction (PFC). Because it is a proprietary HP business-desktop supply, it does not output traditional 5V or 3.3V lines to the motherboard; instead, it outputs variations of 12V rails , leaving the 5V/3.3V down-conversion to the motherboard's VRMs. 1. Input Stage & EMI Filtering
Elara smiled. That was the story. Not just voltages and currents, but the pressure of regulators, the panic of a last-minute revision, the rat in Osaka, and the forgotten arcade cabinet. The schematic wasn't a blueprint. It was a fossil.
A small yellow-taped high-frequency transformer that steps down the primary voltage specifically for the standby rails. The PS-4241-9HA is a proprietary 240W power supply
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If you are looking for a schematic to perform repairs, you may find these alternatives useful: Verification Reports: Detailed efficiency and power waveform data can be found on 80 PLUS site Replacement Parts: The unit is identified by HP spare part numbers 503376-001 508152-001 Repair Discussions: Forums like
The AC current passes through a slow-blow protection fuse. If a primary-side short occurs, this fuse breaks the circuit. The PS-4241-9HA is a robust unit but is
HP Inc Ps42419ha 9244 | PDF | Power Supply - Scribd
Before diving into the layout schematic, it is critical to note the engineering parameters as detailed in its 80 PLUS Verification Report : 240 Watts max. Input Ratings: 100–240 VAC, 4 Amps, 50–60 Hz. Average Efficiency: 88.83% (reaching 90.51% at 50% load).
: Dedicated PWM controller and supervisor IC chips are often tucked on small vertical daughterboards or directly beneath the main components to save trace route space. These manage the Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), and Short-Circuit Protection (SCP) loops. Proprietary Pinout and Wiring Warnings
