The fluorescent lights of the repair shop hummed in B-flat, a drone that Elias had tuned out years ago. His workspace was a chaotic mosaic of logic boards, solder splatters, and discarded heat sinks. But in the center lay the artifact.
It was a Dell D220P-00, a heavy, beige brick of a power supply from an era when computers were built like tanks and sounded like jet engines.
"You’re wasting your time, Elias," said Sarah, leaning against the doorframe. She held a tablet, scrolling through a manifest of modern, surface-mount components. "That thing belongs in a museum, or a landfill. It’s a proprietary brick. You can’t even turn it on without the specific motherboard it was married to. The pinout is a nightmare."
Elias didn't look up. He adjusted his magnifying headset, peering at the 24-pin connector. It was a sea of colorful wires stopping abruptly at a plastic housing that refused to mate with anything modern.
"It’s not waste, Sarah," Elias murmured, his voice gravelly. "It’s a puzzle. The 'D220p-01' revision. They changed the standby logic in this version. People think it’s just a paperweight."
He picked up his multimeter. He didn't need the schematics; he had the internet, specifically a dusty corner of a vintage computing forum titled: “Dell D220p 01 Power Supply Pinout 2: The Lost Diagram.”
Most power supplies were standard. ATX. AT. Easy. But Dell, in their infinite wisdom in the early 2000s, had decided to rewire the universe. The first pinout he found was for the D220P-00. It didn't match. The colors were different. The gray 'Power Good' wire was in the wrong house.
"Pinout 2," Elias whispered. "That’s the key."
He pulled up the grainy JPEG on his dusty laptop. It was a low-resolution image, likely scanned from a service manual twenty years ago.
But the diagram had a jagged red arrow pointing to a specific wire—a purple one on the connector's edge.
"Proposed revision," Elias read the forum note aloud. "Rearranged sensing lines. If you jumper it wrong, you don't just get no power. You feed 12 volts into a 5-volt rail and fry the capacitators. Spectacularly." Dell D220p 01 Power Supply Pinout 2
"So why bother?" Sarah asked, walking over. She looked at the tangle of wires. "You can buy a brand new 500-watt supply for thirty bucks."
"Because this one was built by human hands, not a robot swarm," Elias said, stripping the insulation off a small jumper wire. "And because the client wants to recover data from a Dimension 8100. A machine that holds the only photos of his late father. The motherboard is dead, but the hard drive spins. I need this power supply to wake up the drive without the motherboard."
He took a deep breath. The "Paperclip Test" was the standard way to jump a PSU—connecting the green wire to a black ground. But on the D220p-01, the forum warned, the green wire was a decoy. The real switch was the purple wire, repurposed in this revision.
"Here goes," Elias muttered.
He twisted the jumper wire, connecting the purple wire (Pin 9 in this strange universe) to a black ground.
Silence.
Then, a click.
Whirrrrr.
The fan inside the beige brick shuddered to life. It wasn't the smooth whisper of modern cooling; it was a heavy, authoritative wind. A small LED on the circuit board flickered green. The 'Power Good' signal had been sent.
"You did it," Sarah said, raising an eyebrow. "You speak fluent obsolete." The fluorescent lights of the repair shop hummed
Elias smiled, wiping flux off his thumb. He connected the Molex connector to the old hard drive. The drive spun up with a reassuring chatter.
"It’s not about speaking the language, Sarah," Elias said, unplugging the jumper to power down the unit. "It’s about listening to the history. The D220p-01 had a secret, hidden in its pinout. It just needed someone patient enough to find Pinout 2."
He placed the heavy power supply back on the shelf, ready for the data recovery. It wasn't just a brick anymore. It was a key.
Dell D220P-01 (part of the DA-2 series) is a 216W external power brick providing 12V at 18A. It uses a proprietary 8-pin connector that is mechanically similar to an 8-pin EPS/PCIe connector but has a completely different and incompatible electrical pinout. CPU Medics Connector Pinout Specifications The following pinout is for the female receptacle
as seen from the front, with the clip/fastener at the bottom: Pin Number Wire Color (Internal) Reserved / Remote + +12V Output +12V Output +12V Output Remote Ground / PS_ON Ground (GND) Ground (GND) Ground (GND) Operational Details Power Activation:
To turn the power supply on manually (for DIY projects or testing), you must short Pin 5 to Ground
(typically Pin 6). When successfully jumpered, the LED on the brick will change from orange (standby) to green (active). Compatibility: This unit was originally designed for Dell Optiplex Ultra Small Form Factor (USFF)
models, including the SX280, GX620, 745, 755, and 760 series. Safety Warning:
plug this directly into a standard 8-pin PCIe or EPS motherboard header. The voltages are reversed compared to standard ATX specifications, which can lead to immediate hardware failure or fire. Modifications:
For high-current usage (near the 18A limit), it is recommended to join all three +12V wires together and all three Ground wires together to prevent individual thin wires from overheating. specific DIY applications for this power supply? Dell D220P-01 Power Supply Pinout Guide | PDF - Scribd Pin 11: +3
Solution: Hold the connector so the wire exit is facing you and the locking ramp is on top. The pins are arranged as:
[Pin 1] [Pin 2] [Pin 3]
[Pin 4] [Pin 5] [Pin 6]
(Some units have pin 1,2,3 top row and 4,5,6 bottom row; either way, wire colors are the definitive identifier).
Viewed from the wire side (looking into the back of the connector where wires enter). Locking clip on top.
| Pin | Signal | Wire Color | Typical Gauge | |-----|--------|------------|----------------| | 1 | +3.3V | Orange | 18 AWG | | 2 | +3.3V | Orange | 18 AWG | | 3 | GND | Black | 18 AWG | | 4 | +5V | Red | 18 AWG | | 5 | GND | Black | 18 AWG | | 6 | +5V | Red | 18 AWG | | 7 | GND | Black | 18 AWG | | 8 | PG (Power Good) | Gray | 22 AWG (signal) Note: On D220P-01, this pin is often unused or tied low; real PG is on secondary connector | | 9 | +5VSB (Standby) | Purple | 20 AWG Note: May not be present on main connector; check secondary | | 10 | +12V | Yellow | 18 AWG | | 11 | +12V | Yellow | 18 AWG | | 12 | +3.3V | Orange | 18 AWG | | 13 | GND | Black | 18 AWG | | 14 | PS_ON# | Green | 22 AWG (signal) If green wire is absent, PS_ON# is on secondary connector | | 15 | GND | Black | 18 AWG | | 16 | GND | Black | 18 AWG | | 17 | GND | Black | 18 AWG | | 18 | -12V | Blue | 22 AWG | | 19 | +5V | Red | 18 AWG | | 20 | +5V | Red | 18 AWG |
Important Note: On the D220P-01, several standard ATX pins (like #8 PG, #9 +5VSB, #14 PS_ON) are not populated or are dummy pins. Do not rely on them. Instead, use the secondary connector described below.
If you have ever cracked open a Dell Optiplex GX270, GX280, or an SX280, you have encountered the Dell D220P-01. Manufactured by Delta Electronics (Model number DPS-220PB A), this 220-watt power supply unit (PSU) is a classic example of proprietary OEM engineering. Unlike standard ATX power supplies, the D220P-01 uses a non-standard 20-pin main connector and a unique "sense" wire configuration.
For years, techs have salvaged these units for their surprising build quality (Delta is known for robust components) or attempted to adapt them for standard motherboards. This article provides the definitive pinout for Revision 2 of this PSU. Miswiring this unit will cause immediate short circuits, motherboard damage, or trigger the PSU’s "latching" protection mode.
Solution: The D220P-01 ignores the main connector’s PS_ON# (Pin 14 is empty). You must use the Green wire on the secondary 6-pin connector.
Molex connectors are often used for peripherals.
| Pin # | Description | |-------|-------------| | 1 | 5V | | 2 | 12V | | 3 | GND | | 4 | GND |
Power Supply Units (PSUs) are a critical component of any computer system, converting Alternating Current (AC) power from a wall outlet into Direct Current (DC) power that the system's components can use. The PSU connects to the motherboard via a specific connector, and the configuration of this connector, or pinout, varies by PSU model and manufacturer. The Dell D220p 01, like other PSUs, has a specific pinout that dictates how power is distributed to various components.