🏷️ Basic Information Identification Make: Sony Model: CDX-3900R/4000R/4000RX Product Type: Compact Disc Player Generation: N/A 📋 Manual Details Information Manual Type: Service Manual Language: English Format: PDF Primary Function: Repair and Servicing Intended Audience: Service Technicians 🔧 Maintenance Cleaning Disc Cleaning Recommendation: Use a soft, lint-free cloth and mild disc cleaner. External Cleaning: Wipe with a slightly damp cloth. Avoid abrasive cleaners. Troubleshooting Common Issues Addressed: Disc read errors, loading mechanism faults, audio output problems, control failures. Diagnostic Procedures: Service manual details test points, error codes, and component testing. Calibration Laser Alignment: Requires specialized tools and service manual procedures. Parts Replacement Common Replacement Parts: Laser pickup, drive belt, loading mechanism gears, capacitors. 📄 Technical Specs Audio Output Output Power: N/A (audio output specs depend on connected amplifier) Frequency Response: 20 Hz - 20 kHz Signal To Noise Ratio: >95 dB (typical) Disc Compatibility Supported Formats: CD, CD-R, CD-RW Sampling Frequency: 44.1 kHz Quantization: 16-bit PCM Connectivity Analog Output: RCA (Stereo) Digital Output: Optical (Toslink) or Coaxial (depending on model variant) Remote Control Interface: IR Receiver Power Requirements Power Supply: AC Mains (Voltage varies by region) Power Consumption: Typical: 15-25W (Standby: <1W) Physical Dimensions Width: 430 mm Height: 115 mm Depth: 280 mm Weight: Approx. 3.5 - 4.5 kg