As an unembarrased Sony freak, I have a Sony CFS-9900 that needs some love. Even though I have a service manual for it, I cannot figure out how to fix the FF/AMS. The rewind, play, record, and everything else on this brick works fine. Any ideas on what to look for and repair would be appreciated. Shipping to a service center may be an option; but this thing is quite heavy for a "small portable" - the cost would be "Yikes!" to be modest. Thanks!