Refurbishment
In December 2012, set 05-114 underwent "type B" refurbishment, with a number of improvements utilizing features on the newer 15000 series sets. The traction motors were replaced with new PMSM (permanent magnet synchronous motors), as used on the Chiyoda Line 16000 series sets, and internally, 17-inch LCD passenger information screens were added above the doorways.
Read more about this topic: Tokyo Metro 05 Series