Crown-IC150A-pre-sch维修电路原理图.pdf

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1、RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库SPECIFICATIONS IC 1 5013FREQUENCY RESPONSEHi-level: 0.6dB 3Hz-100KHz with hi-impedance load, 0.1dB 10Hz-20KHz with IHF load; Phono: 0.5dB of RIAAPHASE RESPONSE Hi-level: typically +l to -12 20Hz-20KHz with IHF load; Phono:typically 5 20Hz-20KHz additiona

2、l phase shiftHUM AND NOISE20Hz-20KHz inputs shorted; Hi-level: 95dB below rated output(typically 105dB with IHF “A” weighted measurement); Phono: 85dBbelow 1OmV input (typically 0.3V input noise)DISTORTION IMDISTORTION THDLess than .002% at rated outputwith IHF load (typically under 0.001%)Less than

3、 .0005% 1KHz, max. .05% 20Hz-20KHz at rated outputwith IHF loadINPUTSINPUT GAIN & IMPEDANCEPHONO INPUT OVERLOADMAIN OUTPUTSPHONO OUTPUT & IMPEDANCESix hi-level inputs (1 tuner, 3 auxiliary, 2 tape), twoequalized phonosHi-level: 20.8dB 0.2dB, 1OOK ohms nominal (25K ohms volumemax.); Phono: 50-70dB (a

4、djustable) 47K ohms. Sensitivity: 1OOmV when set to 60dBtotal preamp gain)12V maximum before overload, 2.5V rated, 600 ohms outputimpedance. Switched 0db to -1OdB pad affects both sets of outputs(Available at tape out jacks with input selector in phono) 600 ohmswith typical maximum output of 11V RMS

5、 at 1KHz into hi-impedanceloadMONITOR OUTPUT Stereo, 3 circuit phone output, ahead of 0dB to -1OdB pad; output impedance 2.2K ohms each channelVOLUME CONTROL Precision switched attenuator of 58dB (and off) dynamic range withcalibrated tracking within 0.2dBLOUDNESS COMPENSATION New wide-range design

6、for excellent simulation of I.S.O. curves downto 60 phons; with exclusive dual R/C bass-boost coordinated withvolume attenuator PANORAMA CONTROL Unique, continuously-variable control for infinite adjustment fromstereo to mono to stereo-reverse; replaces conventional stereo-modeswitches and blend con

7、trols with an intuitive control of stereo spatial dimensionTONE CONTROLSMUTINGFILTERSAC OUTLETSPOWER REQUIREMENTSContinuously variable 15dB at 30Hz and 15KHz, cancel switchbypasses independent bass and treble control settings to give instanttrue-flat response in both channelsUses reed relay -removes

8、 turn-on transients from IC-150A output,thus protecting speakersRumble: -3dB at 24Hz with 6dB per-octave cut-off (volume attenuatorat -2O), Scratch: -3dB at 5KHz with 12dB-per-octave cut-offFive switched with 25A switch, one unswitchedAbout 2 watts at 120v or 240v 50-400Hz ACSEMICONDUCTOR COMPLEMENT

9、 Five integrated circuits (equivalent to 89 bipolar transistors, 3 zeners,12 diodes and 25 FETS) for a total of 96 bipolar transistors, 26 FETS, 4zeners and 22 diodesDIMENSIONS 5” H x 17” W; 8 1/8” behind panelWEIGHT 10 Ibs., with walnut cabinet 20 Ibs.PARTS LIST, IC-150A Page 1SchematicDesignationS

10、W30A,B,C,DSW31A,B,C,DIC 130, 230IC 30K30L130, 230D30, 32D33,34D35,36D31D37,38Q30Q31C130, 230C131,231C133,233C134,234C132, 232C135, 235C136,236C137,237C138,238C30C31, 34,35C32,33DescriptionMAIN MODULEMain PC BoardSwitches4 PDT Latching PBCrownPart #4168196273226Integrated CircuitsLF 356H FET-Op AmpRC

11、 4195Relay5K ohms, DPDT, NC, reedCoil12 mhyDiodes1N414841273825349616613181lN961B, lOV, zenerlN4003Transistors2N3859A, selected2N5459, NCH, JFETCapacitors.082 MF 1OOV.47 MF 1OOV354928512961305341334119.047 MF 200V mylar 397825 MF 15V NP vertical 3186.0015 MF 200V filmatic 3089.015 MF 200V filmatic 3288.068 MF 200V filmatic 3190.22 MF 1OOV filmatic 32185 MF 30V vertical 4026250 MF 35V vertical 3787Other InformationLoudness ControlTone Cancel