Andyroo

Hi Can someone please tell me what size the power connector is on the MZ-R700 player? My daughter has lost her PSU and has come home from Uni (without the player of course!) and asked can I sort out a supply to take back tomorrow. If I can locate a suitable connector I can rig up a PSU from a 3V phone charger or make a USB charger lead. I recall that the plug is quite small, all I need to know is the outside diameter of the plug. Any help greatly appreciated - Andy