hifi engine

Need Realistic HK 210/Acrosound Stereo 120 Amplifier Schematic

recently made a trade for a Realistic HK 210/Acrosound Stereo 120 amplifier. would like to restore/repair but do not have the schematic or operating/owner's manual. have done much searching but have come up empty each time. does anyone have a copy or can suggest where they can be obtained?