Sharp OPTONICA SM-4646H Service Manual

m8oPIONICA|SERVICEMANUALSTEREO PRE/MAIN-AMPLIFIERMODELSM-4646H(Silver Panel)SM-4646HB(Black Panel)ie the interests of user-safety the set abe restored to its original condition and only| Parts identical to those specified be used.CAUTIONS:In the case of this model SM-4646H/HB, sincethe power supply voltage and current capacityare relatively high, the potential remains at itSPECIFICATIONSGENERAL DESCRIPTIONa.c. 110/220/240 V, 50/60 Hz520 W2-IC (Integrated circuit)39-Transistor8-FET25-Diode1-LEDWidth: 442 mmHeight: 144 mmDepth: 363 mm16 kgPower source:Power consumption:Semiconductors:Dimensions:Weight:MAIN AMPLIFIERCircuit: Differential amplifier, complementary system, OCL(Output Capacitor-Less)Continuous power output:2 x95W/4ohms, Both channels drivenat 1 kHz, 0.05% distortion2 x70 W/8 ohms, Both channels drivenat 1kHz, 0.05% distortion2 x85 W/4 ohms, Both channels drivenat 20 Hz ~ 20 kHz, 0.05% distortion2 x60 W/8 ohms, Both channels drivenat 20 Hz ~ 20 kHz, 0.05% distortionintermodulation distortion:0.05% at 95Wmore than 50 (at 1 kHz, 8 ohms)5 Hz~ 40 kHz at 0.1%distortion, 47.5 WInput sensitivity and input impedance:650 mV/50k ohmsDamping factor:Power bandwidth:PRE-AMPLIFIEREqualizer amplifier:FET-Differential amplifier, ICL (Input Capacitor-Less),dual power supply (plus and minus)Tone control:FET-Differential amplifier, ICL, Dual poweris without decreasing in about 20minutes evenafter the power switch is turned off. Whenhandling or repairing this set, pay due attentionto this regard.supply (plus and minus), ‘NF’ typeInput sensitivity and input impedance:PHONO 1: 2.5 mV22k ohms, 47k ohms,100k ohmsPHONO 2: 2.5mV~5 mV/47k ohmsAUX: 150 mV/47k ohmsTUNER: 150 mV/47k ohmsTAPE PB 1 and 2:150 mV/47k ohmsTAPE PB (DIN socket) 1 and 2:150 mV/47k ohmsOutput level and load impedance:REC 1 and 2: 150 mV/47k ohmsREC 1 and 2 (DIN socket)30 mV/82k ohmsPhono overload: 350 mV (RMS, 1 kHz)RIAA curve deviation:+0.3dB (20 Hz ~ 20 kHz)Frequency response:5 Hz ~ 70 kHz +1.5dB (TUNER, AUX,TAPE PB)Signal to noise ratio:PHONO 1 and 2: 70 dBAUX, TUNER, TAPE PB: 90dBTone control:Bass: +10dB (at 100 Hz, turnover 600 Hz}+10dB (at 50Hz, turnover 300 Hz)Treble: +10dB (at 10 kHz, turnover 1.5 kHz)+10dB (at 20 kHz, turnover 3 kHz)Low cut filter: —3dB at 30Hz, 12 dB/oct.—3dB at 10 Hz, 12 dB/oct.—3dB at 7 kHz, 6 dB/oct.—3dB at 20kHz, 6 dB/oct.Audio muting: —20 dBSpecifications of this model are subject tochange without prior notice.High cut filter:SHARP CORPORATION OSAKA, JAPANSM-464SM-