Akai-AM-2250-维修电器原理图手册

2.MODEL AM-2250POWER AMPLIFIER SECTIONRATED OUTPUT POWER2-CHANNELS DRIVEN25 watts per channel,minimum RMS at 8 ohms from 20 to 20,000 Hzwith no more than 0.2%total harmonic distortion.POWER BANDWIDTH (IHF)10 Hz to 40 kHz/8 ohms(Total Harmonic Distortion:0.2%)SIGNAL TO NOISE RATIO (IHF)PHONOBetter than 75 dBAUXBetter than 95 dBRESIDUAL NOISELess than 0.7 mV at 8 ohmsCHANNEL SEPARATION (IHF)PHONOBetter than 45 dB at 1,000 HzDAMPING FACTORMore than 50(1 kHz,8 ohms)OUTPUTSPEAKERSA,B(4 to 16 ohms)/A+B(8 to 16 ohms)HEADPHONE4 to 16 ohmsPREAMPLIFIER SECTIONINPUT SENSITIVITY/IMPEDANCEPHONO3 mV/47 kohmsAUX150 mV/100 kohmsTUNER150 mV/100 kohmsTAPE MONITORPIN:150 mV/100 kohmsDIN:30 mV/80 kohmsOUTPUT LEVEL/IMPEDANCETAPE RECPIN:150 mV/100 kohmsDIN:30 mV/80 kohmsFREQUENCY RESPONSEPHONO (RIAA EQUALIZATION)30 Hz to 15 kHz+1 dB,-1 dBTUNER,AUX,TAPE MONITOR10 Hz to 40 kHz+0 dB,-1 dBTONE CONTROLBASS±8dBat100HzTREBLE+6 dB at 10 kHzLOUDNESS CONTROL+9 dB at 100 Hz,+4 dB at 10 kHz(Volume control set at-30 dB position)MISCELLANEOUSSEMICONDUCTORSTransistors:3.Diodes:4.ICs:2POWER REQUIREMENTS120V,60 Hz for U.S.A.and Canada220V,50 Hz for Europe except U K240V,50 Hz for U K.110/220/240V,50/60 Hz Switchable for other countriesDIMENSIONS380(W)x130()x220(D)mm(15 x 5.1 x 8.7)inchesWEIGHT6.2kg(13.61bs)For improvement purposes,specifications and design are subject to change without notice.