PS-4241-9HA is a high-efficiency 240-watt power supply unit (PSU) manufactured for Hewlett-Packard (HP)
. While HP typically does not publicly release official schematic diagrams for individual power boards, technical data and repair community insights provide a clear understanding of its internal "schematic work" and common failure points. Technical Specifications and Architecture The unit is designed for energy efficiency, meeting standards with a typical efficiency of at 50% load. Input Range: Operates on 100–240 Volts AC at 50–60 Hz. Output Rails: Provides stable DC power, primarily a main rail and a (Standby) rail. Control Logic:
The PSU is managed by the computer's motherboard, which sends a signal via the green "standby enable" wire to fully power on the unit. Common Schematic Failures and Repair Steps
Repair technicians often map out specific sections of the circuit to address recurring issues, particularly regarding the Standby Voltage section, which must remain active even when the PC is off. Missing Standby Voltage: Often caused by a damaged Standby Voltage IC
or a faulty resistor powering that IC. Technicians sometimes replace these with slightly higher wattage versions (e.g., replacing an 18W IC with a 20W version) to improve durability. Short-Circuit Protection:
Blown fuses or shorted diodes on the output of the standby transformer are frequent culprits. These can be identified using a multimeter in Diode Mode Fluctuating Output: Usually linked to "bad" or bulging main capacitors
, which fail over time and lose their ability to filter voltage effectively. Secondary Side Shorts:
If the primary side (high voltage) appears functional but there is no output, a shorted diode on the secondary side is a common discovery. Troubleshooting Methodology ps42419ha schematic work
Without a physical schematic, professional repair follows a logical flow: board circuit diagram - HP Support Community - 8314868 25 Feb 2022 —
For the HP PS-4241-9HA power supply, finding a full factory schematic "on paper" can be difficult as manufacturers often treat these as proprietary. However, detailed repair documentation and technical reports provide a clear picture of its architecture and common failure points. Core Specifications
This unit is a high-efficiency 240 Watt custom power supply, commonly used in HP Compaq 6000/6200/8000 Pro series desktops.
Efficiency: 80 PLUS Gold compliant, typically achieving 90.51% efficiency at 50% load. Input: 100–240V AC, 4 Amps, 50–60 Hz.
Outputs: Features a 12V-only main output design with a 12V Standby (12VSB) rail. Key Schematic Components
Technicians have identified the following critical components often used for circuit analysis and repair:
Standby Voltage IC: The TNY279PN is the primary IC responsible for the standby rail. If your unit has no output and no standby voltage (missing on purple/green wires), this IC or its associated 1-ohm feed resistor are the most likely culprits. PS-4241-9HA is a high-efficiency 240-watt power supply unit
Primary Filter: Uses a high-voltage primary capacitor, typically tested at around 145V (at 115V AC input).
Protection: Includes a standard primary fuse and a series of zener diodes near the standby IC to prevent overvoltage. Reference Resources
While official schematics are rare, you can find the most accurate technical data in the 80 PLUS Verification Report (PDF) from CLEAResult, which includes input/output power curves and rated specifications. For visual circuit tracing, detailed repair videos from sources like Fixtronics demonstrate chip-level board layouts and component replacements.
If you're troubleshooting a specific issue, could you tell me:
What symptoms is the PSU showing (e.g., completely dead, fan spins but no boot, or clicking noise)?
Are you looking to replace a specific component, or do you need the pinout for testing? HP Inc Ps42419ha 9244 | PDF | Power Supply - Scribd
80 PLUS Verification and Testing Report. TYPICAL EFFICIENCY (50% Load): 90.51% AVERAGE EFFICIENCY : 88.83% 80 PLUS COMPLIANT: YES. Websites like Digikey , Mouser , or ChipMLCC
It sounds like you're looking for the schematic diagram or service manual for a device labeled PS42419HA — likely a power supply board or an LCD/LED TV power supply unit.
To give you a concrete answer: The "PS42419HA" is most commonly a Samsung power supply board used in older Samsung LCD TVs (e.g., LN40A550, LN46A550, etc. from the A5 series around 2008–2009).
Here’s what you need to know to find the schematic and make use of it:
A: Search for the manufacturer’s application note (e.g., “PS42419HA EVM User Guide”). If unavailable, reference the datasheet’s “Typical Application Circuit.”
Some versions require an external capacitor on SS. Leaving it floating can cause inrush current at startup.
Fix: Add a 10nF to 100nF capacitor from SS to GND.
The secondary side regulation relies on a TL431 shunt regulator and an optocoupler (IC102).
Before placing the component on a schematic, one must understand its internal architecture. Based on technical datasheets and application notes for similar series (e.g., PS42xxx family), the PS42419HA typically integrates the following blocks:
Why this matters for schematic work: Each of these blocks dictates specific external components—inductors, capacitors, resistors divider networks, and compensation networks.