akai_gxc-706-d_sm维修电器原理图

AKAINo.1PRELIMINARY SERVICE MANUALMODELGXC-706DDATE May 1978I.TECHNICAL DATATRACK SYSTEM4 Track,2 Channel Stereo SystemTAPEPhilips Type CassetteTAPE SPEED1-7/8ipsWOW FLUTTERLess than0.055%NRMS,0.17%(DIN45500,45507)FREQUENCY RESPONSE35 to 13,000 Hz +3 dB using LN tape35 to 14,000 Hz +3 dB using LH tape35 to 15,000 Hz +3 dB using CrO2 (SA)tape35 to 15,000 Hz +3 dB using FeCr tapeDISTORTIONLess than 1.3%using LN tape(1,000Hz"0"VU)Less than 1.3%using LH tapeLess than 1.5%using CrOz (SA)tapeLess than 1.5%using FeCr tapeSIGNAL TO NOISE RATIOBetter than 54 dB using LN tapeBetter than 54 dB using LH tapeBetter than 56 dB using CrO2 (SA)tapeBetter than 56 dB using FeCr tape(measured via tape with peak recording level of +3 VU)Dolby N.R.switch ON:Improves up to 10 dB above 5 kHzERASE RATIOBetter than 70 dBBIAS FREQUENCY85 kHzHEADS(2):One Recording/Playback Head,One Erase HeadMOTORS(1):Electronically speed controlled DC MotorF.F.REWIND TIME120 sec using a C-60 cassette tapeOUTPUT JACKSLine(2):410 mV (0 VU)Required load impedance:more than 20 kohmsPhone(1):100 mV/8 ohmsINPUT JACKSMicrophone(2):0.25 mV (Input impedance 5 kohms)Required microphone impedance:600 ohmsLine(2):70 mV (Input impedance 100 kohms)DIN JACKInput:0.25 mV (Input impedance 5 kohms)Output:410 mVRequired load impedance:more than 20 kohmsAKAI ELECTRIC CO.,LTD.(P.O.BOX 21.Tokyo International Airport,Japan)12-14,2.chome,Higashi-Kojiya,Ohta-ku,Tokyo,JapanPrinted in Japan