You can then insulate and or encapsulate the new FLAT PCB and install it near your new 19.5VDC power source.Ī lot of baffling responses claiming this is for DRM, or that it should be left up to the user to make these power determinations.Īs was mentioned, it creates an ecosystem of chargers that can be interchanged easily between systems. You can then desolder/cut/remove EVERY non-SMD component + metal guard/heat sink on the top side of the PCB output section (ONLY the SMD are required for the ID chip to operate properly). The remaining portion of the output section will be about 2-1/2″x2″. The board can be severed right down the middle of the opto-isolators & transformer – cut the leads off both sides of the transformer and remove it (glued only). The entire output section is isolated with a transformer & 2 opto-isolators. Since the SMD ID chip is difficult to isolate, you can instead cut the board into two pieces with a Dremel cut-off wheel. The laptop will charge and run showing “plugged in” to a 130W charger. Supply new 19.5VDC source and attach it to the laptop’s charger cable (Positive=White, Negative is Black)Ĭonnect the “Donor” charger as well (Data=Blue, Negative is Black)Ĭut the “donor” charger’s Positive (White) wire and tie all three Negative (Black) wires together. I can confirm that the technique still works:
It’s been updated with SMD components (no clear DS2501). I bought a used 130W “slim” charger & tore it apart. I’m using a precision 5530 with the Nvidia GPU and 130W charger. Posted in laptops hacks Tagged dell, laptop charger Post navigation Laptop chargers are often prime candidates for failure too we’ve seen fixes as creative as repairing a Magsafe with a pistacchio nut before! It’s a tidy workaround for an annoying problem that is all too common in the post-DRM world. There is some risk, in that if the user plugs in a lower-power charger than the original, there could be an overload event, but that’s just the risk inherent in the hack. Thus, the laptop always thinks a Dell charger is connected when power is applied. This tricked the laptop into charging successfully.įor a more permanent workaround, harvested the One-Wire IC from inside the original charger, and instead hooked it up inside the laptop, directly to the charge port.
When ’s charger broke, an attempt was made to use an off-brand charger, with the third pin hooked up to the original failed unit.
This communicates with a One-Wire IC embedded in the charger, which reports the charger’s identity when queried by the laptop.
The laptop verifies the identity of the attached charger by a third pin. was in just such a position, and decided to hack around the problem. This leaves the user out of luck if they wish to use an off-brand part, or get caught short when their original charger fails. Dell, along with many other manufacturers, have begun to implement smart features into their laptop charging circuitry.
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