Sony-STRK750P-rec-sm 维修电路原理图.pdf

STR-DE495P/K750PUS ModelCanadian ModelSTR-K750PAEP ModelUK ModelSTR-DE495PE ModelAustralian ModelSTR-K750PSERVICE MANUALFM STEREO FM-AM RECEIVER Continued on next page SPECIFICATIONSVer 1.1 2004. 08Dolby Laboratories Licensing Corporation.“DOLBY” the double-D symbol ; “AC-3” and “PRO LOGIC”are trademarks of Dolby Laboratories Licensing Corporation.Photo : STR-K750PSony CorporationAudio GroupPublished by Sony Engineering Corporation9-877-046-022004H16-1 2004.08 STR-DE495P/K750P are the tuner and theamplifier section in HT-DDW750.POWER OUTPUT AND TOTALHARMONIC DISTORTION:With 8 ohm loads, both channels driven, from40 20,000 Hz; rated 90 watts per channelminimum RMS power, with no more than0.7 % total harmonic distortion from 250milliwatts to rated output (Models of area codeU only).Amplifier sectionPOWER OUTPUTModels of area code U, CARated Power Output at Stereo Mode(8 ohms 40 Hz 20 kHz, THD 0.7 %)STR-K750P:90 W + 90 WReference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-K750P:FRONT1):100 W/chCENTER1): 100 WSURR1): 100 W/chModels of area code CEL,CEKRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-DE495P:80 W + 80 W2)Reference Power Output2)(8 ohms 1 kHz, THD 0.7 %)STR-DE495P:FRONT1): 80 W/chCENTER1): 80 WSURR1): 80 W/chModels of area code MXRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-K750P:90 W + 90 WReference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-K750P:FRONT1): 90 W/chCENTER1): 90 WSURR1): 90 W/chModels of other area codeRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-K750P:90 W + 90 W2)Reference Power Output2)(8 ohms 1 kHz, THD 0.7 %)STR-K750P:FRONT1): 90 W/chCENTER1): 90 WSURR1): 90 W/ch1) Depending on the sound field settings and thesource, there may be no sound output.2) Measured under the following conditions:Area codePower requirementsE2/E3120/220/240 V AC, 50/60 HzSP, CEL, CEK230 V AC, 50 HzFrequency responseCD, MD/TAPE, DVD,VIDEO 1, 2Inputs (Analog)CD, MD/TAPE, DVD,VIDEO 1, 23) INPUT SHORT (with sound field and tonebypassed).4) Weighted network, input level.10 Hz 50 kHz+0.5/2 dB (with soundfield and tone bypassed)Sensitivity: 500 mVImpedance: 50 kilohmsS/N3): 96 dB(A, 500 mV4)RadioFans.CN 收音机爱 好者资料库2STR-DE495P/K750PDesign and specifications are subject to change without notice.AbbreviationCA: Canadian model.CEL: AEP model.CEK: UK model.SP: Singapore model. (Malaysia model included.)MX: Mexican model.AU: Australian modelFM tuner sectionTuning range87.5 - 108.0 MHzAntenna terminals75 ohms, unbalancedIntermediate Frequency10.7 MHzSensitivityMono:18.3 dBf, 2.2 V/75 ohmsStereo:38.3 dBf, 22.5 V/75 ohmsUsable sensitivity11.2 dBf, 1 V/75 ohmsS/NMono:76 dBStereo:70 dBHarmonic distortion at 1 kHzMono:0.3%Stereo:0.5%Separation45 dB at 1 kHzFrequency response30 Hz 15 kHz,+0.5/2 dBSelectivity60 dB at 400 kHzAM tuner sectionTuning rangeModels of area code U, CAWith 10-kHz tuning scale: 530 1710 kHz5)With 9-kHz tuning scale:531 1710 kHz5)Models of area code E2/E3With 10-kHz tuning scale: 530 1610 kHz5)With 9-kHz tuning scale:531 1602 kHz5)Models of area code CEL, CEK, SP, AUWith 9-kHz tuning scale:531 1602 kHzModels of area code MXWith 10-kHz tuning scale: 530 1610 kHzAntennaLoop antennaIntermediate Frequency450 kHzUsable sensitivity50 dB/m (at 1,000 kHz or999 kHz)S/N54 dB (at 50 mV/m)Harmonic distortion0.5 % (50 mV/m, 400 Hz)SelectivityAt 9 kHz:35 dBAt 10 kHz:40 dB5) You can change the AM tuning scale to 9 kHz or10 kHz. After tuning in any AM station, turn offthe receiver. Hold down PRESET TUNING + andpress ?/1. All preset stations will be erased whenyou change the tuning scale. To reset the scale to10 kHz (or 9 kHz), repeat the procedure.Video sectionInputsVideo:1 Vp-p, 75 ohmsOutputsVideo:1 Vp-p, 75 ohmsGeneralPower requirementsArea codePower requirementsU, CA, MX120 V AC, 60 HzCEL, CEK230 V AC, 50/60 HzSP220 230 V AC, 50/60 HzE2/E3120/220/240 V AC, 50/60 HzAU240 V AC, 50HzPower consumptionArea codePower consumptionU, MX185 WCA270 VACEL, CEK, SP, AU 180 WE2/E3190 WPower consumption (during standby mode)0.3 WDimensions430 145 298 mm(16 7/8 5 6/8 11 6/8inches) includingprojecting parts andcontrolsMass (Approx.)7.2 kg (15 lb 14 oz)Sensitivity: Impedance: 75 ohmsS/N: 100 dB(A, 20 kHz LPF)Sensitivity: Impedance: S/N: 100 dB(A, 20 kHz LPF)Inputs (Digital)DVD (Coaxial)VIDEO 2 (Optical)OutputsMD/TAPE (OUT),VIDEO 1(AUDIO OUT)SUB WOOFERToneGain levels:6 dB, 1 dB stepVoltage: 500 mVImpedance: 10 kilohmsVoltage: 2 VImpedance: 1 kilohmsRadioFans.CN 收音机爱 好者资料库3STR-DE495P/K750PSAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITHMARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY PARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY. After correcting the original service problem, perform thefollowing safety checks before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs, screws,and all other exposed metal parts for AC leakage. Check leakage asdescribed below.LEAKAGE The AC leakage from any exposed metal part to earth groundand from all exposed metal parts to any exposed metal part havinga return to chassis, must not exceed 0.5 mA (500 microamperes).Leakage current can be measured by any one of three methods.1.A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers instructions to use theseinstruments.2.A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.3.Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The “limit” indicationis 0.75 V, so analog meters must have an accurate low-voltagescale. The Simpson 250 and Sanwa SH-63Trd are examples ofa passive VOM that is suitable. Nearly all battery operateddigital multimeters that have a 2V AC range are suitable. (SeeFig. A)SAFETY CHECK-OUTATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0 SUR LESDIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONTCRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PISES SONYDONT LES NUMROS SONT DONNS DANS CE MANUEL OUDANS LES SUPPMENTS PUBLIS PAR SONY.To Exposed Metal Parts on Set0.15 F1.5 kACVoltmeter(0.75 V)Earth GroundFig. A. Using an AC voltmeter to check AC leakage.Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may bedamaged by heat.Unleaded solderBoards requiring use of unleaded solder are printed with the lead-free mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed withthe lead free mark due to their particular size.) : LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40C higher thanordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350C.Caution: The printed pattern (copper foil) may peel away if theheated tip is applied for too long, so be careful! Strong viscosityUnleaded solder is more viscous (sticky, less prone to flow) thanordinary solder so use caution not to let solder bridges occur suchas on IC pins, etc. Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.4STR-DE495P/K750PTABLE OF CONTENTSMODEL IDENTIFICATION BACK PANEL Parts No.MODELPARTS No.US model4-244-031-0sCanadian model4-244-031-1sAustralian model4-244-031-2sSingapore model4-244-031-3sE4-244-031-4sAEP model4-244-031-5sUK model4-244-031-6sMexican model4-244-031-7s1. GENERAL52. TEST MODE63. DIAGRAMS 73-1.Circuit Board Location 73-2.Block Diagrams MAIN Section 8 DISPLAY/POWER Section 93-3.Printed Wiring Board DIGITAL Board (SIDE A) 103-4.Printed Wiring Board DIGITAL Board (SIDE B) 113-5.Schematic Diagram DIGITAL Section (1/2) 123-6.Schematic Diagram DIGITAL Section (2/2) 133-7.Printed Wiring Board MAIN Board 143-8.Schematic Diagram MAIN Section (1/3) 153-9.Schematic Diagram MAIN Section (2/3) 163-10. Schematic Diagram MAIN Section (3/3) 173-11. Printed Wiring Board POWER Section 183-12. Printed Wiring Board DISPLAY Board 193-13. Schematic Diagram DISPLAY Section 203-14. Printed Wiring Board VIDEO Section 213-15. Schematic Diagram VIDEO Board 223-16. IC Block Diagrams 233-17. IC Pin Function Descriptions 254. EXPLODED VIEWS 274-1. Front Panel Section 274-2. Chassis Section 285. ELECTRICAL PARTS LIST 295STR-DE495P/K750PSECTION 1GENERALThis section is extractedfrom instruction manual.qd2M OMAIN MENU qf (15, 26, 27, 33,34, 51)MASTER VOLUME qs (18, 20,44)MD/TAPE 8 (20)MEMORY wg (28, 30)MENU +/ qh (15, 26, 27, 33, 34,51)MENU qj (15, 26, 27, 33, 34,51)MOVIE (button/indicator) ql (23,45)MUSIC (button/indicator) qk (23,24, 45)P ZPHONES (jack) wh (20, 25, 45)PRESET TUNING +/ ws (30, 48)TUNER FM/AM q; (20, 29, 30,33)TUNING +/ wd (29)VIDEO 1 5 (20)VIDEO 2 6 (20)NUMBERS AND SYMBOLS2CH (button/indicator) wa1 (22, 24,27)?/1 (power) (14, 19, 27, 28,35, 48)ALPHABETICAL ORDERA L(22 24)CD 9 (20)DIMMER 3 (21)DISPLAY 2 (21, 31, 46)Display qa (21)DVD 7 (20)ENTER qg (33, 35)FM MODE wf (29)INPUT MODE qd (20)IR (receptor) 4 (36, 46)3145 6 7 8 9 q; qaqsqfqgqhqjqkqlw;wawswdwfwgwhSURROUND (button/indicator) w;(EXCEPT US, Canadian model)(US, Canadian model)A. F. D (button/indicator) w;6STR-DE495P/K750PSECTION 2TEST MODEFACTORY PRESET MODE* All preset contents are reset to the default setting.* Procedure:While depressing the FM MODE and the PRESET TUNINGbuttons simultaneously, press the ?/1 button again. The message“FACTORY” appears and the present contents are reset to thedefault values.AM CHANNEL STEP 9 KHZ/10 KHZSELECTION MODE* Either the 9 kHz step or 10 kHz step can be selected for the AMchannel step.* Procedure:Set the FUNCTION to AM. Turn off the main power.While depressing the TUNING+ button or thePRESET TUNING + button, press the ?/1 button to turn onthe main power. Either the message “9 k STEP” or “10 k STEP”appears. Select the desired step.* For US/Canadian/E model onlySPEAKER SIZE SELECTION MODE*Either Normal Speaker or Micro Satellite Speaker can be selected.*Procedure: While depressing the MAIN MENU button, press the ?/1 buttonto turn the main power.Either the message “NORM. SP.” or “MICRO SP.” is displayed.Select the desired speaker size.FLUORESCENT INDICATOR TUBE TEST MODE* All fluorescent segments are tested. When this test is activated,all segments turn on at the same time, then each segment turns onone after another.* Procedure:While depressing the FM MODE and the MD/TAPE buttonssimultaneously, press the ?/1 button to turn on the main power.1.All segments turn on.2CH , SURROUND *1), MOVIE and MUSIC LED turn on.2.Press the VIDEO button, confirm display.2CH and MOVIE LED turn on.3.Press the VIDEO button, confirm displaySURROUND *1) and MUSIC LED turn on.SWCSSBSLEEP L F EDIGITALOPTMULTI CH IN 2PROLOGICDTSSPMPEGAACSTEREORDSDDDDMHzkmSWLSLCRSSB SRSLEEP L F EDIGITALEXOPTCOAX MULTI CH IN 12PROLOGIC IIDTS-ESNEO : 6SPBSPASPMPEG-2 AACSTEREO MONORDSMEMORYEQD.RANGEDDDDdBkHzmft.MHzLSLRSREXCOAX1 II-ES NEO : 6SPBSPA-2MONOMEMORYEQD.RANGEdBHzft.4.Press the VIDEO1 button, All segments and all LEDS turn off.5.Every pressing of the VIDEO1 button turns on each segmentand LED one after another in the same order.(Not only the VIDEO1 button, but also the other buttons suchas VIDEO2 , DVD , MD/TAPE , CD and TUNER FM/AM canbe used.)SOUND FIELD CLEAR MODE* The preset sound field is cleared when this mode is activated.Use this mode before returning the product to clients uponcompletion of repair.* Procedure:While depressing the 2CH button, press the ?/1 button to turnon the main power.The message “SF. CLR.” appears and initialization is performed.SOFTWARE VERSION DISPLAY MODE* The software version is displayed.* Procedure:While depressing the FM MODE and the DVD buttonssimultaneously, press the ?/1 button to turn on the main power.The model name, destination and the software version aredisplayed.KEY CHECK MODE* Button check* Procedure:While depressing the MUSIC and the TUNING buttonssimultaneously, press the power ?/1 button to turn on the mainpower.“REST 25” appears.Every pressing of any button other than ?/1 counts down thebuttons. The buttons which are already counted once are notcounted again. When all buttons are pressed “REST 00” appears.AUTOBETICAL MODE* This mode is installed in the Europe models only. When this modeis used, the receiver scans the broadcasts that can be received bythe tuner, and sets up the broadcasts. Be sure to start scanningafter connecting the antenna.* Procedure:1.Check that the antenna is connected.2.Press the ?/1 button to turn on the power while pressing theMEMORY button.3.The message appears and the receiver starts scanning.COMMAND MODE SELECTION MODE* The command mode (AV1 or AV2) of the remote commander canbe selected.* Procedure:1.While depressing the ENTER button, press the ?/1 button toturn on the main power.2.The message “C.MODE.AV 1” or “C.MODE.AV 2” appearsfor a moment. Select the desired mode.*1) A. F. D is used in US and Canadian models.77STR-DE495P/K750P WaveformDIGITAL BoardFor schematic diagrams.Note: All capacitors are in F unless otherwise noted. p : pF. 50WV or less are not indicated except for electrolytics andtantalums. All resistors are in and 1/4 W or less unless otherwisespecified.%: indicates tolerance.f: internal component. 2 : nonflammable resistor. 5 : fusible resistor. C : panel designation. A : B+ Line. B : B Line. Voltages and waveforms are dc with respect to groundunder no-signal (detuned) conditions.No mark : FM Voltages are taken with a VOM (Input impedance 10 M).Voltage variations may be noted due to normal produc-tion tolerances. Waveforms are taken with a oscilloscope. Circled numbers refer to waveforms. Signal path.F: FMJ: CD (ANALOG)c: DVD (DIGITAL) AbbreviationCND: Canadian modelSP: Singapore model (Malaysia model included)AUS: Australian modelTHIS NOTE IS COMMON FOR PRINTED WIRINGBOARDS AND SCHEMATIC DIAGRAMS.(In addition to this necessary note is printed in eachblock.)Note:The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.Note:Les composants identifis parune marque 0 sont critiquespour la scurit.Ne les remplacer que par unepice portant le numro spcifi.Caution:Pattern face side:Parts on the pattern face side seen from(Side A)the pattern face are indicated.Parts face side:Parts on the parts face side seen from(Side B)the parts face are indicated.For printed wiring boards.Note: X : parts extracted from the component side.a: Through hole.f: internal component.: Pattern from the side which enables seeing.CBThese are omitted.EQBThese are omitted.CE1 IC1101 wa (XOUT) 4.4Vp-p1V/div, 40ns/DIV81.4ns (12.288MHz)2 IC1201 9 (MCLK1)3.7Vp-p73.6ns (13.59MHz)1V/div