X and Y-safety capacitors flanked by dual common-mode chokes eliminate electromagnetic interference (EMI). 2. Primary Rectification & Active PFC This section conditions the voltage: Bridge Rectifier: Converts AC voltage into raw, pulsing DC.
HP PS-4241-9HA Go to product viewer dialog for this item. Power Supply Architecture: Circuit Design, Schematics, and Top-Side Components The HP PS-4241-9HA Go to product viewer dialog for this item.
Note: As an OEM custom board, a public, high-resolution official schematic diagram is rarely available. This article acts as a top-level component map based on common repairs. 1. Top-Side View Overview (Component Mapping)
. It is commonly found in small form factor (SFF) desktop systems such as the HP Compaq Elite 8000, 8100, 8200 Pro 6000/6005
: Uses high-frequency transformers to step down voltage, governed by a Pulse Width Modulation (PWM) controller. ps42419ha schematic top
For detailed visual walkthroughs of the component locations mentioned, you can watch the HP PS-4241-9HA PSU Repair Video on YouTube .
While a full proprietary board-level circuit schematic is not publicly released by HP, technical specifications and testing data are available from official certification reports: Technical Specifications Form Factor: Small Power / SFF Max Output Power: Efficiency:
The voltage regulator block consists of a high-efficiency, low-dropout (LDO) regulator and a high-performance, PWM-based DC-DC converter. The LDO regulator provides a stable output voltage for low-power applications, while the DC-DC converter provides a high-efficiency output voltage for high-power applications.
Lacks the wattage and connectors for modern GPUs. X and Y-safety capacitors flanked by dual common-mode
The main specifications and identifiers are:
) feeding the main DC voltage to the drain pin of the standby chip. If the IC shorts out, this resistor blows open to act as a secondary safety mechanism.
The following steps synthesize real repair experiences from online forums.
| Symptom | Likely Cause at Top Level | Schematic Checkpoint | |---------|---------------------------|----------------------| | No output, no VCC | Failed HV startup circuit | Check HV resistor (open), bulk cap voltage, or PS42419HA internal HV current source | | VCC oscillates (8–16V) | Auxiliary winding supply missing | Diode in aux winding, VCC capacitor ESR, transformer coupling | | Output low or pulsing | Overcurrent triggered | Current sense resistor value, CS filter cap, secondary short | | Output accurate but no load regulation | Feedback loop fault | TL431 bias resistor, optocoupler CTR, FB pull-up resistor | | Output spikes on startup | Soft-start missing | Check if PS42419HA has internal soft-start or if external capacitor on FB/comp pin | HP PS-4241-9HA Go to product viewer dialog for this item
By providing a thorough understanding of the PS42419HA schematic top and its applications, this article aims to help designers and engineers make informed decisions when working with this highly versatile and widely used device.
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).
At the top of the schematic, you will find two critical nodes:
The largest transformer on the board, converting pulsed energy to safe low voltages.
