Slide the small heat shrink sleeves over the exposed solder joints and shrink them using a heat gun or the side of your soldering iron.
Looking directly into the end of a round Dell barrel connector tip (such as the standard 7.4mm or 4.5mm plugs), the components route to specific contact surfaces: : Connects to the Blue (ID) wire. Inner Wall Ring : Connects to the White (Positive) wire. Outer Barrel Surface : Connects to the Black (Ground) wire. How the Dell Smart ID System Works
Here’s a technical review of the , focusing on pin functions, common configurations, and safety considerations. 3 Wire Dell Laptop Charger Wire Diagram
The exact wire colors and functions may vary depending on the specific Dell laptop model and charger design. This diagram is a general representation and should not be used for repair or modification purposes without verifying the specific wiring for your device.
The internal wiring structure maps directly from the power brick circuit board to the circular barrel plug (7.4mm x 5.0mm or the smaller 4.5mm x 3.0mm slim plug). Slide the small heat shrink sleeves over the
: If that thin blue wire is frayed or the center pin in the plug is bent, the laptop will not receive this ID signal. To protect its internal circuitry from an unknown power source, the laptop will often still run off the adapter but will refuse to charge the battery and may throttle CPU performance.
The presence of the third wire is often a surprise to DIYers who find that their laptop won't charge even after they've spliced the "main" power wires back together. Outer Barrel Surface : Connects to the Black (Ground) wire
Carries the main DC voltage (usually 19.5V) to power the laptop and charge the battery.