Fast, clear and useful. Important for me: the manual is in German.
Text excerpt from page 87 (click to view)
7. GENERAL INFORMATION
- Removing the Upper Case (not shown) 1. Remove the nine screws. 2. Remove the Upper Case. - Removing the Tuner Amp Unit (Fig.1) Remove the four screws. Remove the two screws. Remove the screw. Straight the tabs at eight locations indicated. Disconnect the connector and then remove the Tuner Amp Unit.