🏷️ Basic Information Identification Make: JVC Product Type: Color Television Model Series: AV-21MS15 FLAT Color TV Compatible Models: AV-21MS15/H, AV-21MS25/A, AV-21MX55/S, AV-21MX75/L Technology: CRT (Cathode Ray Tube) Screen Size: 21 inches 📋 Manual Details Manual Information Manual Type: Service Manual Manual Format: PDF Download Page Count: 65 Language: English Manual Content Key Sections: • Precaution • Specific Service Instructions • Disassembly • Adjustment • Troubleshooting 🔧 Maintenance Cleaning Screen Cleaning Instructions: Use a soft, damp cloth. Avoid abrasive cleaners. Care Cabinet Cleaning: Wipe with a dry or slightly damp cloth. 📄 Technical Specs Power Power Requirements: AC 100-240V, 50/60Hz (typical for region) Display Display Type: Flat CRT Audio Audio Output Power: Stereo (likely 5W + 5W or similar) Connections Video Inputs: AV In (Composite), RF In Audio Inputs: Stereo Audio In (RCA) Tuning Tuner Type: Analog tuner (likely NTSC/PAL/SECAM compatible depending on region) 📄 Troubleshooting Common Issues Picture Distortion: Check for magnetic interference, adjust degaussing. No Sound: Verify volume settings, audio connections, and speaker integrity. No Power: Check power cord connection, fuse, and power supply board. 📄 Service Instructions Safety High Voltage Warning: Extreme caution required when working with internal components due to high voltage. Disassembly Panel Removal: Detailed procedures for removing front panel, chassis, and CRT. Adjustment Picture Geometry Adjustment: Includes pincushion, linearity, and focus adjustments. Color Adjustment: RGB cutoff and gain adjustments for accurate color reproduction. Sound Adjustment: Audio amplifier calibration and tone control adjustments.