Tucked neatly between the main primary capacitor and the central power transformers sits the auxiliary power section. This zone operates continuously whenever the unit is plugged into an active AC outlet to maintain a standby voltage rail for the motherboard.
The mounting holes and size are unique to HP SFF chassis. HP Inc Ps42419ha 9244 | PDF | Power Supply - Scribd
: Small electrolytic capacitors in the startup circuit degrade over time due to heat exposure. If these dry out, the PWM controller will lose its initial bootstrapping voltage, resulting in a dead supply despite a perfectly fine main fuse. ps42419ha schematic top
80 PLUS Bronze or Silver certified, with a typical efficiency of 90.51% at 50% load. Connectors: (1) 6-Pin Main Power Connector. (1) 4-Pin ATX +12V Power Connector. (1) 6-Pin Auxiliary P2 Connector. Top View and Schematic Details
If you are trying to repair a device and found this number on a square black component near the Ethernet ports, you likely need the to check continuity or trace the connection to the main PHY chip. The full schematic for the device the component is inside of (e.g., the router's main board) is usually required to see where these pins connect on the other side. Tucked neatly between the main primary capacitor and
Inspect the top side of the PCB near the main transformer. Look for burned or blackened components. Testing the standby IC and the 1Ω or 2.2Ω fusible resistor often reveals an open circuit. Replacing the TNY279PN and the feed resistor will typically restore the +5VSB. Symptom 2: Missing or Fluctuating Main Outputs
The primary side reservoir capacitor can hold up to 380V DC long after the AC cord is unplugged. Always bleed the capacitor down with a dedicated discharge resistor tool before touching the top or bottom of the board. HP Inc Ps42419ha 9244 | PDF | Power
The guide below details the layout architecture, common component failures, and electrical tracing steps for this PSU. Specifications Overview
Because these units feature custom mechanical layouts and non-standard ATX pinouts, sourcing a schematic and understanding the "top" board topology is essential for component-level repair. This article maps out the top-down circuit topology, primary failure points, and diagnostic procedures for the PS-4241-9HA Go to product viewer dialog for this item. motherboard layout. Key Specifications of the HP PS-4241-9HA