🏷️ Basic Information Identification Make: Kenwood Model: KRF-V7030D / KRF-V7030D-S / KRF-V8030D / KRF-V8030D-S / VR-407 / VR-409 Year: Not specified (Service Manual) Generation: Not specified (Service Manual) 📋 Manual Details Identification Manual Type: Service Manual Language: English (assumed based on product description) Page Count: Not specified Format: PDF Contents Covered Topics: Block Diagram, Circuit Description, Adjustment, PCB Information ⚙️ Engine Specifications General Engine Type: N/A (Audio/Video Receiver) Displacement: N/A (Audio/Video Receiver) Power: N/A (Audio/Video Receiver) 🔧 Transmission General Type: N/A (Audio/Video Receiver) Gears: N/A (Audio/Video Receiver) 📐 Dimensions Physical Length: Not specified (Service Manual) Width: Not specified (Service Manual) Height: Not specified (Service Manual) Weight: Not specified (Service Manual) 🔧 Maintenance Servicing Service Interval: N/A (Service Manual provides repair procedures, not scheduled maintenance) Oil Capacity: N/A (Audio/Video Receiver) 📄 Technical Specs Audio Processing Processing Type: Digital (implied by 'D' in model numbers and VR designation) Audio Formats: Dolby Digital (implied by 'D' in model numbers) Connectivity Input Types: Multiple (detailed in service manual, e.g., analog, digital, component) Output Types: Multiple (detailed in service manual, e.g., speaker terminals, pre-outs, digital outputs) Power Output Channels: 5.1 or 7.1 surround (typical for this era of AV receivers) Power Per Channel: Not specified (Service Manual focus) Features Radio Tuner: AM/FM (typical) Display Type: VFD or LCD (typical for this era) Power Requirements Voltage: AC Mains (detailed in service manual)