This is a common problem with the clean and charge machine for this model. You can either replce the 'arm' or th whole unit. You will find these items at shaveroutlet.com. See links below


http://shaveroutlet.com/shaver-replacement-parts/braun-7000-series-syncro-clean-charge-base-replacement-part-p-118.html

http://shaveroutlet.com/shaver-replacement-parts/braun-7000-series-syncro-clean-charge-base-p-122.html