I'm happy to get a manual from this rare old amp. The pdf is from good qualty.
Text excerpt from page 74 (click to view)
HCD-S400
REVISION HISTORY
Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. 1.0 1.1 1.2 1.3 Date 2002.04 2002.12 2003.01 2003.02 New Servicing note addition of the remote controller. Change of optical pick-up. Note addition in the optical pick-up exchange. Change of the above note.
(SPM-02121,SPM-03003) (SPM-03005) (SPM-02118)