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This page was originally part of the Jarviser Home Hubs Files. They are now housed here at FileSaveAs to help users of the BT Home Hub.

Inside the Home Hub V2.0 power supply unit

Image from the Jarviser Files

Thanks to a manufacturing defect with the new V2 hub's PSU, whereby it comes apart quite easily, I was given a replacement by BT under their product recall process.

Taking advantage of their generosity I put a penknife blade in the corner of the join, gave it a quick twist and the top came off quite easily!

This seems to be a quite sophisticated supply with as much emphasis on suppression of noise as there is with simple power smoothing.
Image from the Jarviser Files

On the mains voltage input side you can see a vertical black component which seems to be a fuse, several suppression components, a small transformer, a full bridge rectifier using 4 conventional diodes and a 33 microfarad smoothing capacitor.

Image from the Jarviser Files

The 15 volt DC output side is quite sophisticated with the large yellow choke, several other passive components and a HUGE single diode, though why that is necessary on a DC side is presumably to protect against reverse currents?


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