HarmanKardon-Citation24-pwr-维修说明书手册含电器原理图

Citation24SPECIFICATIONSNominal LimitNominal LimitInput Sensitivity1.0W±0.15VPower Bandwidth10Hz-100kHzInput Impedance at 1kHz22k0±2k0(1/2 rated power)Frequency Response0.07Hz-490kHzIM Distortion Ratio at 1W0.032%≤0.08Signal to Noise Ratio101.4dB≥95dBDamping Factor at 1kHz90≥265Channel Separation at 10kHz90.8dB≥75dBDC Balance0mV±60mvTotal Harmonic DistortionIdling Current32mv±3mV20Hz0.012%≤0.08%Dimensions (W×H×Dj17-3/8"×6-1/8"×15-11/1611kHz0.009%≤0.08%(443×155×398mm】20kHz0.014%≤0.089%Weight331bs.(15kg)RMS Output PowerPower Supply82,1kHz,THD0.08%/ch.111W≥100WNorth America area model AC 120V,60Hz40,1kHz,THD 0.08%/ch.114W≥100WGeneral modelAC220V/240V,50/60HzJapan modelAC100V,50/60HzPower Consumption610WThis specification is the target of servicing.But,there is a case that the specification is not applicable to the measurementcondition and instrument.Specifications and components subject to change without notice.Overallperformance will be maintained or improved.LEAKAGE TEST (FOR SERVICE ENGINEERS IN THE U.S.A.)Before returning the unit to the user,perform the following safety checks:1.Inspect all lead dress to make certainthat leads are not pinched or thatSIMPSON MODEL 229 ETC.FORLEAKAGE TESThardware is not lodged betweenthe chassis and other metal partsTO FACH EXPOSEDTO AC GROUND SUCHin the unit.METAL SURFACE OFAS WATER PIPE BX CABLE2.Be sure that any protective devicesUNIT UNDER TESTHIGHGROUNDCONDUIT,ETCsuch as nonmetallic control knobs,VOLTAGELEADinsulating fishpapers,cabinet backs,OR +LEADadjustment and compartment coversor shields,isolation resistor-capacitynetworks,mechanical insulators,etc.which were removed for servic-VTVMing are properly reinstalled.3.Be sure that no shock hazard exists;check for leakageO AC SCALEOcurrent using Simpson Model 229 Leakage Tester,standard equipment item No.21641,RCA Model15k10wWT540A or use alternate method as follows:Plug the power cord directly into a 120-volt ACreceptacle (do not use an Isolation Transformer forthis test).Using two clip leads,connect a 1500Ohm,10-watt resistor paralleled by a 0.15 uF capacitor,in series with all exposed metal cabinet parts and0.154Fa known earth ground,such as a water pipe or conduitUse a VTVM or VOM with 1000 Ohms per volt,orhigher sensitivity to measure the AC voltage dropTEST PROBEacross the resistor.(See Diagram.)Move the resistorconnection to each exposed metal part having areturn path to the chassis (antenna,metal,cabinet,TO EXPOSEDCONNECT TO KNOWNMETAL PARTSFARTH GROUNDscrew heads,knobs and control shafts,escutcheon,etc.)and measure the AC voltage drop across theresistor.(This test should be performed with the power switch in both the On and Off positions.)A reading of 0.35 volt RMS or more is excessive and indicates a potential shock hazard which must be corrected beforereturning the unit to the owner.2