HARMAN-KARDON - Model 75 PLUS - AM-FM Stereo Quadraphonic Receiver - Service Manual 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 Schede e recensioni Karman Kardon 75 Sintoampli quadrifonico Di cosa si tratta Sintoampli Limportanza di iscrivervi alla newsletter Produttore Harman Kardon Caratteristiche Quadrifonico Costo - Caratteristiche Illuminated pushbutton power switch Stereo/quad headphone receptac

2、les Speaker selector switches for main and remote stereo or quad systems External Dolby NR/Tape monitor (stereo only) Stereo/quad tape monitor Contour FM muting High cut filter Low cut filter Function selector: Phono, Stereo FM, FM, Discrete FM/Aux, Discrete phono/Aux, AM Separate front and back bas

3、s and treble tone controls TUNER SECTION FM Sensitivity:2.0 microvolts, IHF. Ultimate Signal to Noise Ratio:70db. Capture Ratio:2.5dB. Image Rejection:-50dB. Spurious Response Rejection:-78dB. Multiplex Separation:35dB. Total Harmonic Distortion:0.6% mono. 0.7% stereo. AM Rejection: -50dB. SCA Suppr

4、ession:Totally inaudible. AM Sensitivity: 200 microvolts/meter. Image Frequency Rejection: Better than 55dB. 1 di 613/09/2013 08:08 Mode selector: Mono, Stereo, SQ Matrix, SQ Matrix Blend, Stereo-to-Quad, Discrete Quad Ganged Tour channel volume control Joystick Sound field balance control Station t

5、uning knob Illuminated mode indicator lights Stereo FM indicator light AM/ FM tuning meter lluminated dial pointer REAR PANEL CONTROLS AND FEATURES Swivel AM loopstick antenna Thumbscrew connectors for external AM and FM antennas Dolby NR/Tape Monitor inputs (stereo) Stereo magnetic phono input rece

6、ptacles Four Discrete phono/Aux input receptacles Four Tape Monitor input receptacles Four Discrete FM/Aux input receptacles Two Dolby NR/Tape Monitor outputs Two sets of tape outputs with 8 receptacles (can record simultaneously with two recorders in stereo or quad) Special Quad FM tuner output (si

7、ngle receptacle) Main and remote speaker outputs for stereo or quad AC convenience receptacle Stereo/quad slide switch for double power stereo operation AC line cord AC line fuse Four DC speaker output fuses Phono grounding terminal IF Rejection: Better than 55dB. Selectivity: Better than 34dB. Dime

8、nsions: 16% W x 15 D x 5 H (less knobs) Weight: 28 pounds. Descrizione sintoamplificatore harman-kardon costruzione americana quadrifonico con pilotaggio a leva come da foto,alimentazione 110v e fornito di trasformatore esterno,collegabili 4 coppie di diffusori,alti e bassi regolabili singolarmente

9、per ogni canale,potenza notevole Dal web: Square wave tilt at 20 Hertz is less than 3%. Exceptionally fast high frequency rise time achieved through use of Citation audio circuitry. Better than 2 microseconds rise time at 20kHz. Remote and main speaker selector switching in stereo or quad. Provides

10、flexibility for connecting speakers in stereo, or quad in various parts of the home in numerous permutations. External Dolby noise reduction/tape monitor switch permits user to connect external Dolby NR to system for use with Dolby FM broadcasts, Switch also serves as stereo tape monitor if Dolby NR

11、 not employed. Quadriphonic tape monitor switch provides monitoring for either a quad or stereo recorder. Contour switch restores low frequencies normally lost at low volume levels. High and Low out Filters remove annoying hiss and rumble. Illuminated indicator numerals provide positive identificati

12、on of the mode of operation. Numeral 1 for mono, 2 for stereo, 4-2-4 for SO matrix quad, 4-2-4 for SO matrix blend, 2-4 for stereo synthesis and and 4-4 for discrete quad. 360 joystick sound field balance control enables user to set stereo or quad sound source anywhere within the listening area. Unq

13、uestionably the most versatile control ever designed for a home music system. Synthesizes all stereo program material (FM, tapes, phono) to pseudoquad through use of Harman/Kardon designed phase-shifting network. Network designed to give spacious, totally transparent sound closely approximating the

14、depth and dimension of the concert hall. Harman/Kardon ultra-wideband SO matrix delivers superb four channel sound from SO program sources. Model 754- employs two SO positions for maximum flexibility. First position retains exact balance and perspective of the concert hall while second position intr

15、oduces slight amount of blend in the front channels. This is especially useful for the playback of hard rock and contemporary music or where a soloist is predominant. 2 di 613/09/2013 08:08 Extremely sensitive, low-noise tuner pulls in distant stations with amaz ing clarity and freedom from noise. A

16、utomatic stereo circuit switches FM section to stereo the moment a stereo FM broadcast is received. Provision for discrete quad reel-to-reel, or 8-track cartridge deck. Will also accommodate the new RCA discrete disc system with the addition of Harman / Kardons special external discrete phono adapte

17、r. Provision to play back discrete FM broadcasts (when approved for transmission). Power Output: 45/45 watts, RMS, both channels driven simultaneously into 8 ohms, 20-20kHz at less than 0.5% THD at 120 volts, 50/60 Hertz AC. (in special double power stereo mode) 4x 18 watts, RMS into 8 ohms, 20-20kH

18、z at less than 0.5% THD at 120 volts, 50/60 Hertz AC. ALL FOUR CHANNELS DRIVEN SIMULTANEOUSLY. (Power measurements made by the most stringent and conservative standards. If measured by competitive standards, power would be 55/55 in stereo and 4x 23 in quad) Power Bandwidth: From less than 10 to beyo

19、nd 40kHz into 8 ohms, all channels driven in stereo or quad mode at less than 0.5% THD. Total Harmonic Distortion: Less than 0.5% at any power rating from 0.1 watt to full rated power. (Typically runs below 0.2% from 20-20kHz at fulloutput) Intermodulation Distortion: Less than 0.15% at rated output

20、. Hum and Noise:Better than 85dB below rated output (unweighted) in stereo or quad mode. Damping Factor:40:1 at 4 and 8 ohms. Frequency Response: From below 4 Hertz to beyond 70kHz, 0.5dB at normal power levels. From below 1 Hertz to beyond 100kHz 1.0dB at normal power levels. Square Wave Tilt:Less

21、than 10% at 20 Hertz. (Typically reads 5%) Square Wave Rise Time:Better than 2 microseconds. Stability:Absolutely stable with any type load. Phono Overload:Greater than 75 millivolts. Bass and Treble Tone12db bass boost and cut at 50 Hertz. Control Action:12db treble boost and cut at 10kHz. Scheda fotografica 3 di 613/09/2013 08:08 Vediamo dietro 4 di 613/09/2013 08:08 manuale Come suona 5 di 613/09/2013 08:08