D10-240p1a Schematic Access
Modulates the duty cycle of the pulses to tightly regulate output voltages based on real-time feedback loops from the secondary side. 4. Standby Power Circuit (+12VSB)
No. It is a proprietary power supply with a unique pinout and physical form factor.
Certified 80 PLUS, reaching approximately 91.25% efficiency at 50% load. Connector Pinout: P1: 6-pin main motherboard connector.
To ensure safety and precise regulation, optocouplers straddle the primary-to-secondary isolation boundary. They relay a feedback voltage to the primary PWM chip to dynamically adjust the duty cycle. A dedicated supervisor IC monitors the outputs for Over-Voltage Protection (OVP), Under-Voltage Protection (UVP), and Short-Circuit Protection (SCP). Connector Pinout Specifications D10-240p1a Schematic
D10-240P1A is a 240-watt switching power supply unit (PSU) manufactured by Chicony Power Technology primarily for
is a specialized, 240-watt switching power supply unit (PSU) manufactured by Chicony Power Technology or Hipro Electronics for Hewlett-Packard small form factor (SFF) desktop computers. Understanding its schematic circuit layout is vital for hardware engineers, IT technicians, and electronics repair hobbyists working to restore legacy business desktops like the HP Compaq 6000, 6200, 8000, 8100, and 8200 Elite series. Because original factory circuit blueprints are proprietary and protected by corporate intellectual property laws, technicians must navigate the board using component tracing, functional block understanding, and standard switching topology topologies. Technical Specifications Overview
Expected voltage is between when the unit is in standby. Modulates the duty cycle of the pulses to
Before analyzing the internal schematic stages, you must understand the input/output boundaries of the D10-240P1A hardware. Unlike generic ATX power supplies that distribute major workloads across rails, this HP unit relies almost entirely on a . Electrical Ratings AC Input: (Universal Input) Maximum Continuous Power: Rail: Rail: Rail: Standby Rail: Connector Layout
A: Yes, the universal input stage (bridge rectifier) supports 100-240V. However, at 110V, the primary current doubles. Ensure your input fuse is rated for this (T10A instead of T6.3A if you are consistently at 110V).
Features MOV (Metal Oxide Varistors) for surge protection and X/Y capacitors to filter electromagnetic interference. It is a proprietary power supply with a
+12V main, +12V CPU, and +12V standby (Note: Unlike standard ATX, it lacks 3.3V and 5V rails, which the motherboard generates locally). Form Factor: Custom HP Small Form Factor (SFF). Core Circuit Architecture D10-240P1A
: Provides a continuous +12V standby voltage (+12VSB) to the motherboard even when the PC is turned off. Note that standard ATX uses +5VSB, making this a major point of divergence in the HP design. Main Switching Stage (DC-to-DC Converter)
Look for bulging electrolytic capacitors near the output cables.
Optocouplers cross the isolation barrier from the secondary side back to the primary PWM chip. An internal monitoring supervisor IC (such as a PS224 or equivalent safety chip) continually monitors the +12VMAIN , +12VCPU , and -12V outputs for Over-Voltage (OVP), Under-Voltage (UVP), and Over-Current (OCP) anomalies. If an output threshold is breached, the supervisor drops the feedback loop to instantly shut down primary switching. Common Failure Points and Troubleshooting Paths
| | Chicony Power Technology | | :--- | :--- | | Input | 100–240 V~ / 4 A, 50–60 Hz | | Output Power | 240W | | Efficiency | 80 PLUS, ~90% efficient at 230V | | Form Factor | SFF Proprietary (not standard ATX) |