Ps42419ha Schematic — Work !!hot!!

The PS-4241-9HA uses a proprietary, non-standard connector set.

The voltage is converted to a raw DC voltage via a bridge rectifier.

By mapping the layout from input EMI filters to active PFC correction, down through the specialized TNY279PN auxiliary loop, and finally out across the efficient ZVS LLC resonant converter stages, repairing or modifying this 240W workplace staple becomes a highly methodical process.

To drive the gate of the upper N-channel switching MOSFET, the voltage at the BST pin must be higher than the VIN supply. A small ceramic capacitor (usually 0.1µF, rated for 25V or 50V) is placed directly between the BST pin and the SW pin. When the SW pin transitions to ground, this capacitor charges up through an internal diode, ready to pump the gate drive when the SW node goes high. Schematic Design Checklist ps42419ha schematic work

The HP PS-4241-9HA is a widely used 240-watt, 80 PLUS certified power supply unit (PSU) found in many older HP ProLiant servers and desktop models, dating back to 2009. While these units are known for their efficiency, they are not immune to failure, particularly after years of operation. Understanding the is essential for technicians and DIY enthusiasts looking to repair rather than replace these units.

Always discharge the main high-voltage capacitor before touching the board. Check Standby Voltage: Measure the purple/green wire for +5V or +12V standby (depending on the specific HP pinout). Visual Inspection:

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. HP Inc Ps42419ha 9244 | PDF | Power Supply - Scribd To drive the gate of the upper N-channel

The successful repair outlined on Yoreparo involved adding a in series with PGI (Pin 1) to lower its voltage to 0.45V [18†L33-L34]. This small change brought the voltage into the acceptable range for the IC, allowing the PSU to power on and operate normally without triggering protection.

shows the specific IC replacement process and voltage testing. Component Identification : Check the board for T2.5A 220V/120V fuses and signs of heat damage around the switching transistors. Are you experiencing a specific symptom

The PS42419HA is a widely used power supply unit (PSU) found in various consumer electronics, most notably plasma and LCD televisions. When these entertainment units fail to power on, click repeatedly, or lose specific video rails, the PS42419HA is often the culprit. Schematic Design Checklist The HP PS-4241-9HA is a

Boosts efficiency to over 88-90%. Main Converter (12V): Generates the primary 12V output.

Some variants of the PS42419HA include an additional SS (Soft-Start) pin or a MODE pin for PWM/PFM selection. Always cross-reference the marking code.

Monitors for overvoltage, undervoltage, and short circuits. 2. PS42419ha Schematic Work: Common Failure Points