Pioneer-SX1000TD-rec-sm维修电路原理图.pdf

PIONE.E.R Solid state AM/FM STEREO RECEIVER M.DELSX-1 OCICITEI CAUTI0N Before connecting the line cord to the wall socket, carefully read and follow the instructions shown below, to assure the safety of your unit. OModel SX-1000TDO is set lo 24OY operation when shipped. lf this unit is used in a different line-voltage area, read and follow LINE VOLTAGE SELECTION AND FUSE on page 1. Be sure that the line voltage setting on your unit agrees with the line voltage in your area and that the fuse installed in your unit is a proper one. OPERATING INSTRUCTIONS PItrNEE,R f,.Lf.GTRONItr EORPORATION RadioFans.CN 收音机爱 好者资料库 IPIONEER SOME UNIQUE FEATURES: aFM front - end employing a field effect transistor to hear more stations more clearly olntegrated circuit (lC) employed in FM tuner assures outstanding capture ratio with high reliability. oMultiplex circuitry (MPX) for maximum channel separation oUnique muting circuit permits the easiest tuning control oHigh performance single ended push-pull (SEPP) output stage eliminates audio transformers and provides large output with true frequency fidelity OFull complement of inputs and outputs oElectronic switch fully protects precious power transistors the By the use of FET (field effect transistor) in the FM radio frequency amplifier stage, design of nearly perfect FlVl front-end was achieved-free from cross modulation, free from drift, with better sensitivity, lower inherent noise, and high spurious rejection ratio. ln the FM intermediate frequency amplifier stage, integrated circuits are employed, resulting in an entirely different outstanding performance from that of lFstages hitherto designed, especially in the limiter characteristic and the capture ratio. The accurate electronic switching circuitry is employed in the FM multiplex demodulator, insuring maximum separation with excellent tonal quality. The muting circuit provided in the FlVl tuner completely eliminates the FM inter station noise whrch has hitherto been annoying the user in tuning. The power amplif ier employs the high-performance single ended push- pull circuitry in the output stage and the push,pull complementary circuitry in the driver stage, completely eliminating the distortion rnherent transformers from the audio stage. Tripple diffused mesa transistors are adopted as the power transistors in the output stage for full-fidelity frequency response with large audio output power and least harmonic distortion. The inputs and outputs pr,ovided in the receiver include two pairs of pHONO MAG inputs. When two turntables are connected to these inputs, the user is able to switch from one turntable to the other any time at will. Also, two pairs of ioudspeaker outputs are included for switching between, or for per- mitting the simultaneous use of, two loudspeakers. The electronic switchrng circuitry employed in the power supply completely protects expensive power transistors even when the loudspeaker leads are shorted while the receiver un,L is in use INSTALLATION As this receiver is sully transistorized, desirable places to install it are as follows: OPlaces airy and free from humidity and dust. Avoid insta ling on close, low-ceiling shelves. OPlaces not directly exposed to the sun ray. OPlaces not close to heat-emitting objects such as heaters and stoves. LINE VOLTAGE SELECTION AND FUSE Switching Line Voltage Setting and Fuse In order to remove the fuse, turn the fuse cap located on the line voltage selector switch in the direction indicated by an arrow. Then remove the fuse plug from the unit. Put the fuse plug back so that the proper line voltage marktng can be seen thru the cut on the edge of the plug. Whenever the set position of the selector swttch is changed, check the rating of the fuse. A 1.5-ampere fuse is to be used for either 220l or 24OV operation and a 3-ampere fuse for any of 110V, 117V, or 130V operation. lf the rating of the fuse is proper, install the fuse on ihe fuse cap. OPlaces where there is as little vibration as possible and where the surface is level. The optimum stereophonic listening position is across the room from the speakers, sornewhere close to the midpoini between the right and leit speaker systems. Fig. 1 OReplacing of Fuse When the fuse is blown off, remove the fuse cap and replace the fuse with a new one. wTv yZ FUSE cAP FUsE rusF PLUG socKE Ta*e off the luse caD by lurning rr wirh a coin, etc. in th dneclion indicared hy the RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 TPIONEE SELEOTOR FM AIJTO :!:zr.l FM N4oNo/ I e.b/3+ loFifiiEEtrlsg 1t D STATE Sr ERES R ECETVE R vonrr sx - r the front section adlusts the section adjusts the right channel is adjusted for both channels the response for only one channel. the section corre- sponding to the channel may be adlusted while the other is held by hand. left channel and the rear Usaully, the tone response simultaneously. To adjust Fie. 4 1. LOUDSPEAKERS This switch selects the loudspeaker system to be used and also serves as the main power switch. lts positions are as follows: POWER OFF.For turning the unit power off. Fig. 5 the volume level of the left and 10. v0LuME This control adjusts the volume level. Turning it clockwise will increase the volume, and turning it counterclockwise will decrease the volume. 11. LOUDNESS CONTOUR For listening at low volume settings, this switch is set to the L0UDNESS position to increase the sounds in the extreme bass and treble range for adding reality to the reproduction. For listen- ing at high volume level, this switch is normally set to OFF. 12. LOW FILTER Setting this switch to the LOW FILTER position will eliminate low f requency noise such as record rumble, hum, or other interference. When noise rs not present, this switch is normally set to OFF. 13. HIGH FILTER Setting this switch to the HIGH FILTER position wili eliminate high frequency noise, such as record scratch, hiss, static noise from fluorescent lamps, or other interference. When no such norse is present, this switch is normaily set to OFF. 14. MUTING SWTTCH When an FIV station is tuned in, setting this switch to IVIUTING will eliminate interference noises between FM stations. For re ceptron of a weak-signal station, the switch should be set to OFF, 15. AFC SWITCH The function of the AFC (automatic frequency control) circuit is to compensate automatically for tuning drift which frequently occurs when listening in an FM station for a long ttme. This switch should be set to the OFF position when tunrng in a statron, and afier the station has been tuned in, t should im mediately be set to the AFC positton. 16. PHONO SWITCH This control switch selects the record player to be used. PHON0 l .For reprodution of the output of the record player connected to the PH0NO i jacks (26). PH0N0 2 .For reproduction of the output ot the record player connected to the PHON0 2 jacks (27). S. BA!-ANCE This control serves to balance right channels. MArN . EXTRA . For listening through main loudspeakers. For listening through extra loudspeakers. NIAlN-EXTRA .For listening through both main and extra loudspeakers. SP. 0FF.For muting all loudspeakers. (This f unction is convenient when the headphones are used.) 2. FM STEREO INDICATOR This indicator light autornatically switches on when the FM station is broadcastrns stereo. 3. TUNING INDICATOR This meter indicates the optimum tuning points for AM or FN4 stations. For tuning in a station, the TUNING control (4) is adjusted to produce maximum swing of this meter. 4. TUNING This control tunes the receiver to the desired AM or FM station. 5. SELECTOR This control switch selects the program material to be repro- duced; the iype of radio broadcast, phonc, or tape playback. Alvl .-.For reception of AM (medium-wave broadcast band) station. Flvl lvlONO.For reception of FM monaural stations. Fl1 AUTO.For reception of FM broadcasts, with auto- maiic switching between FM monaural and stereo. PH0NO .For playback of records. 79/l I I t .This position provides prooer equalization for tapes recorded at 19 centimelers br 7r/z inches) per second. 9.5/33/a .This position provides proper equalization for tapes recorded at 9.5 centrmeters (or 33/q inches) per second. AUX.For reproduction of signals fed to the AUX 6. PHONES This jack is for 7. BASS jacks (30) stereo headphones This control adjusts bass response. Turning it to clockwise will boost, and turning it counterclockwise will reduce bass response. The center top indicates the intermediate point. 8. TREBLE This control ad.lusts trebLe response. Turn ng t clockwise will RadioFans.CN 收音机爱 好者资料库 17. MODE/TAPE MON. SWITCH This switch is the selector for stereo/mono and tape monitor settings. lts positions are as follows: aN40DE positions (for playback of records or reception of broadcasts) STERE0.For reproduction of stereo program. LEFT .For reproduction through both left and right channel loudspeakers of program material being fed to any of left channel inputs. R1GHT.For reproduction through both left and right channel loudspeakers of program material being fed to any of right chaniel inputs. aTAPE MON positions (for playback of tapes or for monitoring of tape being recorded). STEREO.For stereo reproduction or stereo monitoring of recorded tapes. 1EFT.For mono reproduction of only left channel of recorded tape. R|GHT.For mono reproduction of only right channel of recorded tape. Functions of the rear panel controls terminals and inputs. 18. AM FERRITE LOOPSTIGK ANTENNA This is a loopsiick antenna for the reception of AM stations. ln areas relatively close to the AM station, this antenna will provide satisfactory reception. This antenna has directional proper. ties, so rt should be moved about while listening to a station and set at the position providing the best reception. 19. SEPARATION GONTROI This control adjusts the channel separation of FM multiplex stereo broadcasts. lt has already been adjusted at the factory, and normally there should be no need for any further adjust_ ment. 20. AC OUTLET This is an AC outlet that provides a convenient source of power for any associated equipment. lt has a maximum capacity of 115VA. 21. AC oUTLET This is another AC outlet and has a maximum capacity of 230 VA. This outlet is not controlled through the SpEAKERS switch (1) and remains Iive at all times. 22. AM ANTENNA TERMINAT This is the terminal for connection with the AM antenna (medi_ umwave broadcasts). 23. GND 1 When using a ground lead for the receiver, it should be con_ nected to this terminal. 24. FM ANTENNA TERMINATS These are the terminals for connection with the FM antenna. 25- TAPE HD When driving program material signals direcfly from the heads of a tape player, the output cables should be connected to these input jacks. 26. PH0N0 I 27. PH0N0 2 When using two turntables which are equipped with a magnetic cartridge, the output cables of the second turntable should be connected to these input jacks. 28. GND 2 lf a turntable equipped with a ground lead is used, the ground lead should also be connected to this terminal. 29. PHONO CER When using a turntable which is equipped with a ceramic or crystal cartridge, the output cables should be connected to these input jacks. 30. AUX These are input jacks for auxiliary inputs such as the audio signal from a TV set. 31. TAPE MON The outputs of the LINE 0UTpUTS (the monitor output or play- back output) of the tape recorder should be connected to these input jacks. 32. TAPE REG The LINE INPUTS (the inputs or AUX inputs for recording) of the tape recorder should be connected to these recording output jack s. 33. Tape REC/P.B. C0NNECT0R (DtN type) lf your tape recorder is provided wrth the DIN_type record/play. back connector and also you have a connecting cord with DIN- type connectors, the tape recorder can be connected with this unit for both recording and playback by simply connecting the cord between the recorder and this unit. 34. LINE VOLTAGE SELTCTOR AND FUSE The line voltage selector and fuse are assembled into one unit. For instruction on change of line-voltage setting or on fuse replacement, see LtNE VOLTAGE SELECTION AND FUSE,on page 1. 35. IINE GORD This is the AC power cord. The AC plug provided at one end of this cord is inserted into the ad.lacent wall socket. 36. MAIN LOUDSPEAKER TERMINALS (RIGHT CHANNEL) The right channel main loudspeaker leads are connected to these terminals. 37. MAIN LOUDSPEAKER TERMINATS (LEFT CHANNEL) The left channel main loudspeaker leads are connected to these terminals. 38. EXTRA IOUDSPEAKER TERMIIALS (RTGHT CHANIEt) The right channel extra loudspeaker leads are connected to these terminals. 39. EXTRA LOUDSPEAKER TERMIIALS (LEFT CHANlEL) The left channel extra loudspeaker leads are connected to these terminals. When using a turntable that is equipped with a magnetic cartridge, the output cables should be connected to these input jacks. RadioFans.CN 收音机爱 好者资料库 IPIONEE Antenna and Ground Connections AM antenna OThe ferrite loopstick antenna (181 mounted on the rear of the receiver will provide satisfactory reception of local stations with strong signals. Because the loopstick antenna has di rective properties, its direction may be adjusted for the best reception while listening to a statron. Fig. 6 Olf noise is strong in your area and the adjustment of the loopstick antenna direction does not improve the situation, the furnished AM lead antenna may be laid on the wall or on other standing object as high as possible, and one end of the antenna lead should be connected to the AM antenna terminal (22). lf ihe furnished antenna dose not help, an outdoor AM antenna may need to be set up. In this case, the antenna lead should also be connected to the Alvl antenna terminal (22) FM Antenna Olf the receiver is situated in regions close to the transmitting site or is placed in a wooden building, the furnished simple indoor T-shaped antenna will provide satisfactory results. ln this case, the 2 wires of the twin leads from the antenna should be connected to the Fl1 antenna terminals (24) and the horizontal element of the T-section should be extended and positioned for the best reception while listening to an FM station. Then, the antenna should be secured to the wall or to any support. Oln regions where the furnished indoorT-shaped antenna provides poor results such as many noises or poor channel separation, an outdoor FM antenna may be required. ln this case, the leads from the outdoor antenna should also be connected to the FM antenna terminals (24). For information about the outdoor FM antenna, consuit a TV shop in your area. OG rou nd ln some area, the use of a proper ground reduces noise sig- nificantly. The lead from an appropriate grounding electrode such as a water pipe or a ground rod, is connected