Dell Inspiron 16 Plus 7620 DC Power Jack Charging Port Cable Socket Plug Connector DC JACK

DC Jack (Power Connector) – Selection & Installation Guide

Dell Inspiron 16 Plus 7620 DC Power Jack Charging Port Cable Socket Plug Connector DC JACK (Model: 003VP9 450.0QC02.0002) is a replacement DC power jack (also called charging port or power connector) designed for laptop motherboards. This component connects the AC adapter to the laptop's power supply circuit. Choosing the correct DC jack is critical – even a 0.1mm difference in size or a 1V voltage mismatch can cause charging failure or motherboard damage.

Technical Specifications:

• Part Number / Model: 003VP9 450.0QC02.0002
• SKU: LT-10026973
• Product Status: Brand New
• Warranty: 90‑day replacement

Critical Selection Factors – Check Before Ordering!

• Interface Size (Outer Diameter × Inner Diameter) – Common sizes include:
  • 5.5×2.5mm – Dell, HP, Lenovo, most standard laptops
  • 5.5×2.1mm – Some HP, Acer, and smaller laptops
  • 4.0×1.7mm – Ultrabooks, thin laptops (Dell XPS, etc.)
  • 3.0×1.1mm – Very small laptops, some Lenovo Yoga
  • Square / proprietary shapes – Some brands (e.g., Lenovo rectangular, HP slim) use non‑round connectors
  Even a 0.1mm difference means the plug will not fit.
• Voltage Rating – Must match your laptop's original specification:
  • 19.5V – Dell (most models), HP (most models), Acer
  • 20V – Lenovo, ASUS, many newer models
  • 19V – Older laptops, some Toshiba
  • 18.5V – Some HP older models
  • 16V – Some smaller laptops (e.g., Netbooks)
  Using a jack rated for the wrong voltage can cause overheating, charging failure, or motherboard damage.
• Pin Count & Pin Definition:
  • 2‑pin – Simple power and ground. Common in older laptops.
  • 3‑pin – Power, ground, and a sensing pin (ID pin) that communicates with the charger to identify wattage. Common in Dell, HP, and Lenovo.
  • 4‑pin – Additional data lines for advanced communication.
  • Pin orientation matters – even with the same number of pins, the positions may differ between brands.
• Mounting Type:
  • Through‑hole – soldered directly to the motherboard.
  • SMD (Surface Mount) – mounted on the surface of the board.
  • Cable‑mounted – connected via a flexible cable.
  • Verify the mounting style – the replacement must match exactly.
• Physical Dimensions – The overall size, pin spacing, and orientation must match the original.

How to Identify Your DC Jack's Specifications:

• Measure the outer diameter – use a digital caliper to measure the outside of the metal barrel (where the charger plugs in).
• Measure the inner diameter – measure the inside hole of the barrel (using calipers or by checking the charger plug size).
• Check the original part – look for printed labels or part numbers on the old DC jack (sometimes on the side or bottom).
• Count the pins on the motherboard – look at the solder pads or connector.
• Search your laptop model – use the laptop's full model number to find the original DC jack PN.
• Send us photos – take clear photos of the original DC jack from multiple angles, showing the size, pin layout, and any labels.

Installation & Soldering Precautions:

• Always power off and disconnect the battery before replacing the DC jack.
• Use a temperature‑controlled soldering iron – set between 350°C and 380°C. Too hot can damage the motherboard; too cold will not melt the solder properly.
• Apply flux – using flux improves solder flow and helps prevent cold joints.
• Don't overheat the board – keep contact time under 3‑5 seconds per pin to avoid damaging the PCB pads.
• Check for solder bridges – ensure no two pins are shorted together.
• Use solder wick to remove old solder if the original jack is still in place.
• Secure the jack with the mounting screws – if your design has screws, they provide mechanical stability and relieve strain on the solder joints.
• Test before fully reassembling – plug in the charger and verify charging works before closing the case.

Common Problems & Solutions:

• Charger not detecting / no charging light:
  • Check all solder joints – a cold joint may be the cause.
  • Verify the ID pin is connected correctly – on 3‑pin jacks, the sensing pin must be properly soldered.
  • Check the fuse on the motherboard – sometimes the DC jack shorts and blows the fuse.
• Charger fits loosely / intermittent connection:
  • Check the inner pin – if it's pushed in or missing, the jack may be defective.
  • Ensure the jack is fully seated in the chassis opening.
• Overheating / burning smell:
  • Check for a short circuit – the positive and ground pins must not touch.
  • Verify the voltage rating is correct – using a 20V jack on a 19V system may cause overheating.
• AC adapter damaged / sparks:
  • Immediately disconnect the charger and check for shorts.
  • Ensure the jack is properly aligned and not bent.

Need help identifying or installing your DC jack? Send us clear photos of your original DC jack (showing the barrel size, pin layout, and any labels) – we'll confirm the exact specifications and compatibility. For custom orders or assistance, email us at email.