I'm happy to get a manual from this rare old amp. The pdf is from good qualty.
Text excerpt from page 3 (click to view)
C-V500/V550/V700/V750/V770
DISASSEMBLY FOR REPAIR
1. Remove the 1 screw (1), Then pull the slider (2) till last 2. While raise the slider of left side, remove the slider from the bosses (3,4)