Hello Danny,
The default icon for Devices and Printers is located at the registry locations below. This will also change the icon in all other locatations as well. For example in the Control Panel.
HKEY_CLASSES_ROOT\CLSID\{A8A91A66-3A7D-4424-8D24-04E180695C7A}\DefaultIcon
I have not found the Recorded TV one yet though.