Pioneer-SX3800-rec-sm1 维修电路原理图.pdf
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1、Sefvice nualFM Ouartz LockedSTEREO RECEIVERii,i i, i,., s r - ft3rc:rl ttr:;!; L *,.ir*.ts(/ -i- pSc2.ies- -borf o Sla&t-1r,:.-i,six-gaoo(DrrroNER.RadioFans.CN 收音机爱 好者资料库MODEL SX.38OO COMES IN FOUR VERSIONS DISTINGUISHED AS FOLLOWS:TypeVolt4eRemarksKU120V onlyU.S.A. models/G1 10V, 120V, 22QV, and 24
2、0V (Switchable)U.S. Militarv models1 10V, 12OV, 22OY , and 24OV (Switchabte)General exDort modelKCl20V onlyCanada modelr This service manual is applicable to the KU type. When repairing the S/G and S Wpe, pleasesee the additional service manual lp 47 -p571. When repairing the KC type. olease see the
3、 a-dditional service manual (ART-519).CONTENTSI;tHHHnIHHHHTHHIitII+1. SPECIFICATIONS2, FRONT PANEL FACILITIES3. BLOCK DIAGBAM4. CIRCUIT DESCRIPTIONS4.1 FM Tuner4.2 AM Tuner4.3 Display Circuit4.4 EqualizerAmplifier4.5 Tone Control Amplifier4.6 Power Amplif ier . . .4.7 Power Indicator Circuit4.8 Prot
4、ection CircuitD I S A S S E M B L Y . . . .PARTS LOCATIONDIAL CORD STRINGINGADJUSTMENTS8,1 FM Tuner8.2 AM Tuner 228.3 PowerAmplifier. 238.4 FL Indicator Circuit 249. EXPLODED VIEW 2510. SCHEMATIC DIAGRAM, P.C. EOARDCONNECTION DIAGRAM AND PARTS LIST10. 1 Schematic Diagram 3l10.2 P.C. Board Connection
5、 Diagram 351 0 . 3 P a r t s L i s t . . . , . . . 4 11 1 . P A C K | N G . . . . 4 6ADDITIONAL SE RV ICE MANUALI . S P E C | F | C A T | O N S . . . . . 4 72. CONTRAST OF MISCELLANEOUS PARTS . . . . 483. SCHEMATIC DIAGRAM, P.C. BOARDPATTERNS AND PARTS LIST3. 1 Schematic Diagram 493.2 Switch Assembl
6、y AWS.148) 575.18.357Ioo1 21 21 214141 61 71 920eRadioFans.CN 收音机爱 好者资料库IItrttttIttTttttItI1. SPECTFTCATIONSPower Ampl if ier SectionContinuous Power 0utput of 60watts* per chan-nel, min., at Sohms from 20Hertz to 20,000Hertz with n0 m0re than 0.005% total harmonic distortion,Total Harmonic Distorti
7、on (20 Hertz to 20,000 Hertz,I ohms)continuous rated power output . . No more than 0.005%30 watts per channel power outputNo more than 0.005%Intermodulation Distortion (50 Hertz : 7,000 Hertz = 4 : 1)continuous rated power output No more than 0.0057o30 watts per channel power outputNo more than 0,00
8、5%Frequency Response. . . . . 5 Hertz to 200,000 Hertz l! OAlnput Sensitivity/lmpedance (POWER AMP lN)or,rri 1v/50 kilohmsSpeaker A, B, A+B-: : : 1*: 1o i* He*z 8 0hms)Hum and Noise (lHF, short-circuited, A network)115d8Preamplifier SectionI nput (Sensitivity/l mpedance)PHONO 2.5mV/50 kilohmsAUX,TAP
9、E PLAY 1,2 . . . . . . 150mVl50kilohmsPhono Overload Level T.H.D.0.005%, 1,000 Hertz)PHONO . . . 250mVOutput ( Level/l mpedance)T A P E R E C I , 2 . . . . , . 1 5 0 m VPREAMP OUT (Rr_: 50 kilohms)- . . . . 1 V / l k i l o h m s V o l u m e : m a x . Total Harmonic Distortion (20 Hertz to 20,000 Her
10、tz)Tone ControlBASS . tSdB (100H2)T R E B L E . . . . . r , l 0 d B ( 1 0 , 0 0 0 H 2 )Subsonic Filter . 15Hz (-6dB/oct.)Loudness Contour (Volume control set at *40d8 position). . . . +6dB (100H2),+3dB (10,000H2)Hum and Noise (lHF, short-circuited, A network)P H O N O . . . . . . 8 2 d 8A U X , T A
11、P E P L A Y 1 , 2 . . , . . . . 1 1 O d BAttenuator. .-20d8FM Tuner SectionPHONO (REC OUT)AUX,TAPE PLAY 1,2 . . . . . .Frequency BesponsePHONO (RIAA Equalization)or, iori ,ro i ,;ou to 20000 Hertz t02dBUsable Sensitivity (lH F )50dB Ouieting SensitivityMONOSTEREOSignal-to-Noise RatioMONOSTEREODistor
12、tion (at 65dBf)MONO l00Hz.l k H z .6kHz .STEREO IOOHz.lkHz .6kHz -Capture Ratio. ,Alternate Channel Selectivity4 0 0 k H z . . , . . , 7 f t 8Stereo Separation1 k H z . . . . . . . 4 5 d 83 0 H 2 t o 1 5 k H 2 . . . . . . . 3 5 d BFrequency Response. . . . 2 H z t o 1 5 k H z 1 ! l o eSpuriousRespon
13、se Ratio, . . . . . . 65dBlmageResponseRatio . 65dBl F R e s p o n s e R a t i o . . . . . . 9 0 d BAMSuppressionRatio . 55dBSubcarrierProduct Ratio . . . . . . . 50dBSCARejectionRatio . 64dBMuting Thteshold 19.2dBf (5pV)Antenna lnput . 300 ohms balanced,75 ohms unbalanced.10.3dBf 1.8itv)16.2dBf (3.
14、6sV)37dBf (39pV)83dB (at 65dBf)78dB (at 80dBf,0.1o/oa.a7%0.15%O.2Yo0.15%0.25%r.odBNo more than 0.005%10V outputNo more than 0.005%(10V output)7Hz to 8o,0oo Hertz f aaEix-3El00Itr|r|ttt;ttttrltrltil+AM Tuner SectionSensitivity (lHF, Ferrite antenna). . 300pV/mlHF, Ext.antenna . . . 15pVS e l e c t i
15、v i t y . . . . . 3 0 d 8Signal-to-NoiseBatio . 50dBlmageResponseRatio . 40dBl F R e s p o n s e R a t i o . . . . . . 4 0 d BAntenna . FerritelooostickantennaAudio SectionOutput ( Level/l mpedance)F M ( 1 0 0 % M o d . ) . . . . . . 6 5 0 m V l 1 k i l o h m sA M ( 3 O % M o d . ) . . . . . . 2 0 0
16、 m V / 1 k i l o h m sSemiconductorsf C s . . . . . . . . . . 1 7F E T s . . . . . . . . 6T r a n s i s t o r s . . . , . 7 1D i o d e s . . . . . . . 5 8MiscellaneousPowerRequirements . ACi20V,60HzPowerConsumption . . 200W(ULlDimensions .506W x164H) x434Dmm19-15116(W) x6-7/16(H) x 17-1116(D) inWeig
17、ht (without package) 16.2k9 (351b 12oz)Furnished PartsOperatinginstructions . . . . . . . . . 1F M T - t y p e a n t e n n a . . . . . I* Measured Dursuant to the Federal Trade Commissions TndeRegulation rule on Power Output Claims for Amplif iers,NATE:Specifications and the design subject to poisib
18、le modificationswithout notice due to improvements.tTttrIttrtITrTt2. TRONT PANEL FACILITIESc POWER SWTTCHSet this switch to ON to supply power to the receiver.There will be a short delay when it is set to ON, becausethe muting circuit has been actuated to suppress theunpleasant noise that is sometim
19、es generated when thepower is switched on and off .O spERrER swtrcHEsDepress the switch corresponding to the speakers con-nected to the SPEAKERS terminals (A or B) on the rearpanel.You can depress both of these buttons to listen to thesound from two pairs of speaker rystems at the sametime. gnlcHrNE
20、ss sELEcroRUse this switch to select the brightness of the powermeter and the frequency displav.BRIGHT: When using the receiver in daylight or otherDIM:bright locations.At night or in dark locations when the exist-ing brightness is too high.CI POWER METERThis meter allows you to read out the rated p
21、ower levelon the fluorescent display tube when speakers with anominal impedance of g ohms are connected to thespeaker terminals. orel PoINTERThis pointer indicates the broadcasting stations. bunnrz LocKED tNDtcAToRThis indicator lights up after the optimum tuning pointhas been obtained and displays
22、that the receiving state isstabilized by the built-in quartz lock circuit.O TTU STEREO INDICATORThis indicator lights up when receiving an FM stereoprogram if the FM muting off switch is released.,o SIGNAL INDICATORThis indicator lights in sequence from left through rightduring the tuning of an AM o
23、r FM broadcast in accord-ance with the strength of the signals being received.The optimum tuning point is where the maximumnumber of indicators light. rururruc tNDtcAToRWhen tuning in an FM station, the optimum receptionpoint is indicated when the center indicator lights up.When the left indicator h
24、as come on. rotate the tuningknob slightly clockwise. When the right indicator comeson, rotate the knob slightly counterclockwise- rnEouENCY DTSPLAYThis indicates the frequency which is tuned.With FM reception, the letters ,FM., appear on the leftof the display and ,MHz, on the right. With AM recep.
25、tion, AM appears on the left and ,kHz. on the right.These change when the function selector position ischanged.0 rururruc KNOBUse this knob to tune in to broadcasting stations.c FM MUTTNG OFF SWTTCHWhen this switch is released and an FM broadcast tunedin, the muting circuit is activated inside to su
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