Jvc KSFX 490 Service Manual

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1-2 (No.49845) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTIONMaximum Power Output Front 50 W per channel Rear 50 W per channel Continuous Power Output (RMS) Front 19 W per channel into 4 -„¦, 40 Hz to 20 000 Hz at no more than 0.8 % total harmonic distortion. Rear 19 W per channel into 4 -„¦, 40 Hz to 20 000 Hz at no more than 0.8 % total harmonic distortion. Load Impedance 4 -„¦ (4 -„¦ to 8 -„¦ allowance) Tone Control Range Bass ±10 dB at 100 Hz Treble ±9 dB at 10 kHz Frequency Response 40 Hz to 20 000 Hz Signal-to-Noise Ratio 70 dB Line-Out Level/Impedance 2.0 V/20 k-„¦ load (250 nWb/m) TUNER SECTION Frequency Range FM 87.5 MHz to 107.9 MHz AM 530 kHz to 1 710 kHz [FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 -„¦) 50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 -„¦) Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response 40 Hz to 15 000 Hz Stereo Separation 35 dB Capture Ratio 1.5 dB [AM Tuner] Sensitivity 20 µV Selectivity 35 dB CASSETTE DECK SECTIONWow & Flutter 0.11% (WRMS) Fast-Wind Time 100 sec. (C-60) Frequency Response (Dolby B NR OFF) 30 Hz to 16 000 Hz (Normal tape) Signal-to-Noise Ratio (Normal tape)(Dolby B NR ON) 65 dB (Dolby B NR OFF) 56 dB Stereo Separation 40 dB GENERAL Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance) Grounding System Negative ground Allowable Operating Temperature 0°C to +40°C (32°F to +104°F) Dimensions (W × H × D) Installation Size 182 mm x 52 mm x 150 mm (7-3/16" x 2-1/16" x 5-15/16") Panel Size 188 mm x 58 mm x 12 mm (7-7/16" x 2-5/16" x 1/2") Mass 1.3 kg (2.9 lbs) (excluding accessories)

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(No.49845)1-3 SECTION 1 Precautions 1.1 Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.