Grundig C6500 renovation

Many thanks for providing service manual and scheme of Grundig C6500!!! I own this device since 1979. For the last
30 years it was stored at my attic. After replacing broken fuse Si 803  it works well. There are only some problems with
mechanical contacts while switching between reception bands and / or playback cassette back to radio 
(contacts supposed to be be cleaned with contact spray), lamp La 802  has to be replaced and cassette part itself no constant speed while play pack (supposed to be cleaned, and or replace some rubber belts)