pioneer-qx-747-brochure维修电器原理图

PIONEER3X-747full-capability four-channel stereo receiver,complete with built-in CD-4 demodulatorand matrix decoding circuitry for regular matrix and SQ encoded sources.力西··)以》边》Today's variety of four-channel program sources has createdfive-stage limiter and high-performance IC in the IF anda need for a multi-purpose,total capability four-channelmultiplex section,the QX-747's AM/FM tuner section isreceiver that can decode and reproduce all sources withoutloaded with the very latest solid state circuitry.There isthe addition of extra demodulators or other accessories.complementary direct-coupled OCL circuitry in the powerThe QX-747 receiver from Pioneer fills that need-and thenamplifier section that produces 20W x 4 of continuous RMSsome.For the first time there is now a practically-priced,power,guaranteed over the critical 20 to 20,000Hz soundbig power receiver that decodes all the four-channel sourcesrange.And by the use of a new"Power Boosting Circuit",-regular matrix,SQ matrix and CD-4 discrete discs;playsthe QX-747 converts this large four-channel power outputall four-channel tapes;plays all conventional two-channelto 40W x2 when used as a two-channel receiver.Otherdiscs and tapes.It is not necessary any more to add a CD-4features include an automatic protection circuit to preventdemodulator or SQ decoder to new four-channel equipmentDC shock to speakers or power transistors,as well as ao"bring it up-to-date."Pioneer's QX-747 is the completestriking four-channel indicator on the front panel that letsreceiver.It's about time.From its four-gang variable capa-you view all four-channel level adjustments.The QX-747citor and dual-gate MOS type FET in the front end to thefrom Pioneer.The last world in four-channel sound.