This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
Text excerpt from page 3 (click to view)
2) INITIAL MODE A. INITIAL MODE is performed between EJECT MODE and LOADING MODE. Also this is used as the reference mode determining whether or not Cassette Down has finished completely when Cassette In is performed and whether or not the unloading has finished when the state proceeds from STOP MODE to EJECT MODE. B. Mechanical Arrangement a. The S & T-Main Brake are released from the S & T-Reel Table. b. The Band Brake is released from the S-Reel Table. c. The S-Sub Brake is applied to the S-Reel Table. d. The T-Sub Brake is applied to the T-Reel Table. e. The Idler Gear is applied to the S-Reel Table.