: Custom SFF (Small Form Factor), measuring roughly 148mm x 128mm x 94mm. Input : 100-240V AC, 50-60Hz.
The PS25A is a specialized from Silicon Touch Technology Inc. It's designed for switching power supply systems and is responsible for monitoring and protecting the power supply's output.
I will structure the article as follows:
The information suggests that "ps42419ha" is likely a typo or a variant of "PS-4241-9HA", which is a 240W power supply for HP small form factor (SFF) desktops. The user is asking for a "schematic top", which could mean a top-level schematic diagram or a top view of the power supply.
For repair technicians, engineers, and hardware enthusiasts, navigating the top-side layout of this circuit board requires a deep understanding of its localized stages. This guide breaks down the physical layout, block-schematic architecture, and common component failures found on the top-side trace of the PS-4241-9HA ps42419ha schematic top
The is a 240W Power Supply Unit (PSU) manufactured by HP for use in their small form factor (SFF) desktop computers. While a complete proprietary schematic is typically not released to the public by HP, the unit's design and technical specifications provide a clear roadmap of its internal architecture and role within enterprise computing. Technical Architecture and Efficiency
If you are looking for a technical document, here is some general information:
A large ferrite-core transformer driven by dual primary MOSFETs in a forward or half-bridge configuration.
A heavy-duty, high-voltage electrolytic capacitor (typically rated at 400V–450V) that smooths the pulsed DC voltage out of the rectifier. 3. The Standby Voltage Rail (Primary Center-Right) : Custom SFF (Small Form Factor), measuring roughly
I will cite the sources appropriately. search term "ps42419ha schematic top" most often refers to the , a 240W power supply unit (PSU) widely used in the HP Elite 6000, 6005, 6200, 8000, 8100, and 8200 Small Form Factor (SFF) desktop series. It is a proprietary power supply designed to fit the compact cases of these business-class systems.
The PS25A continuously monitors the +12V, +5V, and +3.3V rails. If any rail deviates outside its safe operating range, the IC triggers the pin, which shuts down the PSU to protect the system. Forum repair attempts have shown that a common failure mode is a stuck FPO signal , which can sometimes be bypassed by forcing the PS25A’s PGI pin to a lower voltage (e.g., from 1.92 V down to 0.45 V) with a 100Ω resistor, effectively overriding the protection circuit.
: The line input begins with a standard time-delay glass fuse alongside an NTC thermistor utilized for inrush current protection.
Transformer T1 secondary --- Schottky Diode --- Output Capacitor --- Vout (+) | GND (secondary) It's designed for switching power supply systems and
If you're inexperienced with electronics, particularly high-voltage equipment, it's safer to replace a faulty power supply. When working inside a PSU, always discharge the large primary capacitors first, as they can retain a lethal charge even when unplugged. There is a reason these units carry "No user-serviceable components inside" warnings.
The unit is recognized under multiple HP part numbers, primarily and Spare PN: 508152-001 . It adheres to the 80 PLUS certification standards , delivering high efficiency under standard workplace computing loads. Specification Form Factor Small Form Factor (SFF) Proprietary Designed for HP Elite 6000, 6005, 8000, 8100, 8200 Max Output Power 240 Watts Distributed over proprietary 12V rails Input AC Range 100–240 V AC (4 Amps max) 50–60 Hz Auto-ranging input Typical Efficiency 90.51% at 50% Load 88.83% Average efficiency rating Output Rails 12V Main, 12V Standby (12VSB) Lacks standard ATX 3.3V and 5V rails Schematic Topology & Component Blocks At the top level of the schematic layout, the PS-4241-9HA Go to product viewer dialog for this item.
: 80 PLUS Bronze certified, with a typical efficiency of approximately 90.51% at 50% load.
This guide deconstructs the schematic layout, operating specifications, and troubleshooting methodologies for the HP PS-4241-9HA to assist in bench repairs. Core Technical Specifications