You will probably find that the condensers are failing. It is a well known fault with the 901. You can purchase new ones via a few sites, you need a .47U one and a .015u one. Try the rapid site. its cheaper than buying off a kenwood spares site. Get a metallic ones they are about 20p each. Removing the old ones is easy, about 30mins with a soldering iron to remove and replace. You just need to take off the bottom cover (remove the 2 phillips screws that hold the "sprung angle bit", undo the srcew that retains the cable, undo both wires from the small junction box and take of the black base. You will see the condensers (they are the rectangular things!!). Lift them up and see if they are swollen, buckled, broken or leaking. If so thats your problem. If not I'm afraid its a case of checking the motor brushes. Again its easy, remove the 3 screws tat hold the liquidise. Underneath are 3 bolt that retain the motor. Remove and the motor slides out. The motor brushes are in the retainig things on the side. Undo the 2 screws and slide them out. you should have plenty of carbon bits left. If not, you can get new brushes on e bay.
Good luck
Dave Gooding, October 2007
