🏷️ Basic Information Identification Make: JVC Model: AV-28R57SK Variant: COLOUR TV Compatible Models: AV-28R57SK, AV-28R57SK/P, AV-32R57SK, AV-32R57SK/P 📋 Manual Details Document Info Manual Type: Service Manual Language: English Page Count: 71 Format: PDF Content Overview Major Sections: Precautions, Specific Service Instructions, Disassembly, Adjustment, Troubleshooting 🔧 Maintenance Cleaning Screen Cleaning Recommendation: Soft, damp cloth (no harsh chemicals) Troubleshooting Guidance Common Issues Covered: No picture, no sound, color distortion, horizontal/vertical lines 📄 Performance Display Technology Display Type: CRT (Cathode Ray Tube) Screen Size: 28 inches Aspect Ratio: 4:3 Color System Color System Support: NTSC, PAL, SECAM 📄 Connectivity Input Ports Av Input Ports: Yes Rf Input: Yes Scart Ports: Likely (common for European models) Output Ports Audio Output: Yes 📄 Power Power Supply Power Requirements: AC 100-240V, 50/60Hz (typical) Power Consumption Typical Power Consumption: Approx. 90W (typical for 28-inch CRT) 📄 Features Audio Speaker System: Built-in stereo speakers Audio Features: Bass, Treble, Balance control Tuning Tuner Type: Analog VHF/UHF Channel Presets: Yes