🏷️ Basic Information Identification Make: Kenwood Model: KDC-8021 / M9021 / X859 Generation: Not specified (likely a specific generation of CD receivers) 📋 Manual Details General Manual Type: Service Manual Language: English Format: PDF Download Content Included Sections: Block Diagram, Component Description, Microcomputers Terminal Description, Test Mode, PC Board, Schematic Diagram, Exploded View, Parts List, Specifications 📄 Device Type Category Device Category: Car Audio Receiver Functionality Primary Function: CD Receiver 📄 Technical Details Electronics Processor Type: Microcomputers (Terminal Description included) Circuitry Schematic Availability: Yes (Schematic Diagram) Physical Structure Component Layout: Exploded View (Parts List) Troubleshooting Diagnostic Mode: Test Mode Parts Management Parts Identification: Parts List Diagnostics Circuit Level Analysis: PC Board (Level Analysis) System Overview System Architecture: Block Diagram Performance Performance Data: Specifications Components Component Function Description: Component Description Interface Microcomputer Terminals: Terminal Description