Sony-STRDE725-rec-sm 维修电路原理图.pdf

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1、STR-DE725US ModelSERVICE MANUALMICROFILM Continued on next page SPECIFICATIONSManufactured under license from Dolby Laboratories LicensingCorporation.“DOLBY” the double-D symbol a “AC-3” and “PRO LOGIC”are trademarks of Dolby Laboratories Licensing Corporation.FM STEREO FM-AM RECORDERAUDIO POWER SPE

2、CIFICATIONSPOWER OUTPUT AND TOTAL HARMONIC DISTORTION:With 8 ohm loads, both channels driven, from 20 - 20,000 Hz; rated100 watts per channel minimum RMS power, with no more than0.09% total harmonic distortion from 250 milliwatts to rated output .Amplifier sectionPOWER OUTPUTStereo mode(8 ohms 20 Hz

3、 20 kHz, THD 0.09%)100 W + 100 WSurround mode(8 ohms at 1 kHz, THD 0.8%)Front: 100 W/chCentera): 100 WReara): 100 W/cha)Depending on the sound field settings and the source, there may be nosound output.Dynamic power output155 W + 155 W, 8 ohms220 W + 220 W, 4 ohmsHarmonic distortion at rated outputL

4、ess than 0.09% (with sound field, tone, and bassbooster bypassed)Frequency responsePHONO: RIAAequalization curve0.5 dBCD, TAPE, MD/DAT, TAPE/MD, DVD/LD, TV/DBS,VIDEO 1 and VIDEO 2 :10 Hz - 50 kHz +0.5/2 dB (with sound field, tone,and bass booster bypassed)Inputs (Analog)PHONO:Sensitivity: 2.5 mVImpe

5、dance: 50 kilohmsS/Nb): 75 dB (A, 2.5 mVc)CD, DVD/LD, TAPE, MD/DAT, TAPE/MD, TV/DBS,VIDEO 1 and VIDEO 2 :Sensitivity: 150 mVImpedance: 50 kilohmsS/Nb): 82 dB (A, 150 mVc)b)78 IHFc)Weighted network, input levelInputs (Digital)DVD/LD:Sensitivity: Impedance: S/N: 100 dB (A, 20 kHz LPF)OutputsTAPE/MD, (

6、REC OUT); VIDEO 1, 2(AUDIO OUT):Voltage: 150 mVImpedance: 10 kilohmsWOOFER:Voltage: 2 VImpedance: 1 kilohmsPHONES:Accepts low - and high-impedance headphonesBASS BOOST+6 dB at 70 HzRadioFans.CN 收音机爱 好者资料库 2 Sampling Frequency48 kHzEQBASS:100 Hz 1.0 kHz (21 steps)MID:500 Hz 5.0 kHz (21 steps)TREBLE:1

7、.0 kHz 10 kHz (21 steps)Gain levels:10 dB, 1 dB stepFM tuner sectionTuning range87.5 - 108.0 MHzAntenna terminals75 ohms, unbalancedSensitivityMono: 18.3 dBf, 4.5 VStereo: 38.3 dBf, 45 VUsable sensitivity11.2 dBf, 2 V (IHF)S/NMono: 76 dBStereo: 70 dBHarmonic distortion at 1 kHzMono: 0.3 %Stereo: 0.5

8、 %Separation45 dB at 1 kHzFrequency response30 Hz - 15 kHz +0.5/-2 dBSelectivity60 dB at 400 kHzAM tuner sectionTuning rangeWith 10-kHz tuning scale:530 - 1710 kHzd)With 9-kHz tuning scale:531 - 1710 kHzd)AntennaLoop antennaUsable sensitivity50 dB/m (at 1,000 kHz or 999 kHz)S/N54 dB (at 50 mV/m)Harm

9、onic distortion0.5% (50 mV/m, 400 kHz)SelectivityAt 9 kHz: 35 dBAt 10 kHz: 40 dBd)You can change the AM tuning scale to 9 kHz. After tuning in any AMstation, turn off the receiver. Hold down the TUNING + button andpress the 1/u button. All preset stations will be erased when youchange the tuning sca

10、le. To reset the scale to 10 kHz, repeat theprocedure.Video sectionInput1 Vp-p 75 ohmsOutputs1 Vp-p 75 ohmsGeneralSystemTuner section:PLL quartz-locked digital synthesizer systemPreamplifier section:Low- noise NF type equalizerPower amplifier section:Pure-complementary SEPPPower requirements120 V AC

11、, 60 HzPower consumption290 WAC outlets2 switched, total 100 WDimensions430 355 157.5 mm(17 14 61/4 in.)including projecting parts and controlsMass (Approx.)10.5 kg (23 lb 3 oz)Supplied accessories FM wire antenna (1) AM loop antenna (1) Remote commander RM-PP401 (remote) (1) Carbon-ZINC dry batteri

12、es (2)Design and specifications are subject to change without notice.RadioFans.CN 收音机爱 好者资料库 3 SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITHMARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS WITH SONY P

13、ARTS WHOSE PART NUMBERSAPPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTSPUBLISHED BY SONY.TABLE OF CONTENTS 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,an

14、d all other exposed metal parts for AC leakage. Check leakage asdescribed below.LEAKAGE The AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microampers).Leakage current can be meas

15、ured 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 ac

16、ross 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

17、 AC range are suitable. (SeeFig. A)SAFETY CHECK-OUTTo Exposed Metal Parts on Set0.15F1.5kACvoltmeter(0.75V)Earth GroundFig. A. Using an AC voltmeter to check AC leakage.1.GENERAL 42.TEST MODE63.DIAGRAMS3-1.Circuit Boards Location 73-2.Block Diagram Main Section 93-3.Block Diagram Power Section 113-4

18、.Printed Wiring Board AMP Section 133-5.Schematic Diagram AMP Section 153-6.Printed Wiring Board Video Section 173-7.Schematic Diagram Video Section 193-8.Printed Wiring Board AUDIO Section 213-9.Schematic Diagram AUDIO Section 233-10. Printed Wiring Board Input Section 253-11. Schematic Diagram Inp

19、ut Section 273-12. Printed Wiring Board Display Section 293-13. Schematic Diagram Display Section 313-14. Printed Wiring Board SPEAKER Section 333-15. Schematic Diagram SPEAKER Section 353-16. Printed Wiring Board Power Section 373-17. Schematic Diagram Power Section 393-18. Printed Wiring Board DIG

20、ITAL (SIDE A) Section 413-19. Printed Wiring Board DIGITAL (SIDE B) Section 433-20. Schematic Diagram DIGITAL Section (1/3) 453-21. Schematic Diagram DIGITAL Section (2/3) 473-22. Schematic Diagram DIGITAL Section (3/3) 493-23. IC Pin Function Description 513-24. IC Block Diagrams614.EXPLODED VIEWS4

21、-1.Front Panel Section 644-2.Chassis Section 655.ELECTRICAL PARTS LIST66 4 SECTION 1GENERALLOCATION AND FUNCTION OF CONTROLSFRONT PANEL11/u (POWER) button2MULTI CURSOR CONTROL3SURROUND, EQUALIZER, INDEX indicators4DIRECT TUNING button5VIDEO 1 button6MULTI CHANNEL DECODING indicator7TV/DBS button8SOU

22、ND FIELD GENRE button9SOUND FIELD MODE button0SOUND FIELD, EQ, BASS BOOST indicators!MASTER VOLUME control!BALANCE control!MUTING button!SOUND FIELD ON/OFF button!BASS BOOST button!EQ ON/OFF button!INPUT MODE button!PHONO button!DVD/LDTUNER buttonCD buttonVIDEO 2 buttonTAPE/MD buttonNumeric buttonsS

23、HIFT buttonDISPLAY buttonMEMORY buttonFM/AM buttonFM MODE button#SLEEP button#PHONES jack#TUNING +, buttons#SPEAKERS A, B switche#PRESET TUNING +, buttons#SET UP button#CURSOR MODE button1234567890!?# 5 REAR PANEL1DIGITAL2ANTENNA (FM/AM)3TV/LD4DVD/LD5VIDEO 26VIDEO 17MONITOR8S-LINK9WOOFER0SPEAKERS (R

24、EAR)!SPEAKER (CENTER)!WIRELESS REAR SPEAKER!IMPEDANCE SELECTOR!AC power cord!AC OUTLET!FRONT SPEAKERS (A/B)!SPEAKERS (FRONT)!CD!PHONOy SIGNAL GND123 4567890! ! ! 6 SECTION 2TEST MODEFLUORESCENT INDICATOR TUBE TEST MODE* All fluorescent segments are tested. When this test is activated,all segments tu

25、rn on at the same time, then each segment turns onone after another.* Procedure:While depressing the SET UP and the SOUND FIELD MODEbuttons simultaneously, press the power 1/u button to turn onthe main power. All segments turn on at the same time, then eachsegment turns on one after another.FACTORY

26、SET MODE* All preset contents are reset to the default setting.* Procedure:While depressing the SET UP and the SOUND FIELD ON/OFFbuttons simultaneously, press the power 1/u button to turn onthe main power. The message FACTORY SET appears and thepresent contents are reset to the default values.ALL CL

27、EAR MODE* All preset contents are cleared when this mode is activated. Usethis mode before returning the product to clients upon completionof repair.* Procedure:While depressing the DISPLAY and the SOUND FIELD ON/OFF buttons simultaneously, press the power 1/u button toturn on the main power. The ma

28、chine enters the DEMOmode.DEMO mode: Wait a while, then the demonstration starts.If the power 1/u button is pressed often the demonstration hasstarted, the power is turned off, and the demonstration resumes ifthe power 1/u button is pressed again.ALL CLEAR mode; If the power 1/u button is pressed of

29、tenthe machine enters the DEMO mode, but before the demonstrationstarts, the display is turned off. Press 1/u again. No response isreturned. Then press 1/u again. The preset data is cleared andthe machine enters the normal power-on state.SOUND FIELD CLEAR MODE* The preset sound field is cleared when

30、 this mode is activated.Use this mode before returning the product to clients uponcompletion of repair.* Procedure:While depressing the SOUND FIELD ON/OFF button, pressthe power 1/u button to turn on the main power. The messageSURR CLEAR! appears and initialization is performed.AM CHANNEL STEP 9 kHz

31、/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 the PRESET TUNING+ button, press the power 1/u button to turn on the main power.Either the message AM

32、9kHz STEP or AM 10kHz STEP appears.Select the desired step.DSP TEST MODE* Procedure:While depressing the SET UP and the SOUND FIELD GENREbuttons simultaneously, press the power 1/u button to turn onthe main power. The message DSP NO ERROR or DSP ERROR.STR-DE725 7 8 SECTION 3DIAGRAMS3-1. CIRCUIT BOAR

33、DS LOCATIONFor schematic diagrams.Note: All capacitors are in F unless otherwise noted. pF: F50 WV or less are not indicated except for electrolyticsand tantalums. All resistors are in and 1/4 W or less unless otherwisespecified.%: indicates tolerance. 2 : nonflammable resistor. 1 : fusible resistor

34、. C : panel designation. U : B+ Line. V : B Line. H : adjustment for repair. 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 productiontolerances.

35、Waveforms are taken with a oscilloscope. Circled numbers refer to waveforms. Signal path.F: FMJ: CDc: DIGITALI : PHONOTHIS NOTE IS COMMON FOR PRINTED WIRINGBOARDS AND SCHEMATIC DIAGRAMS.(In addition to this necessary note is printed in eachblock.) Waveform1 IC1201 ( (XO)2 IC1101 (X OUT)3 IC1101 (CLK

36、 OUT)4 IC102 * (XO)4.0Vp-p5.5Vp-p5.4Vp-p3.0Vp-p4MHz24.576MHz12.288MHz4.0MHzFor printed wiring boards.Note: X : parts extracted from the component side.: Through hole. b : Pattern from the side which enables seeing.The components identified by mark ! or dottedline with mark ! are critical for safety.

37、Replace only with part number specified.SW boardH.P boardSP SW boardDISPLAY boardBALANCE boardSP boardREAR AMP boardAC boardAMPLIFIER boardVIDEO boardTUNER boardD.IN/OUT boardDIGITAL boardAUDIO boardINPUT boardJOINT boardVOLUME boardL.B boardREG boardLED boardSTR-DE725 9 10 3-2. BLOCK DIAGRAM MAIN S

38、ECTION L60DATAFMAMFM75AMDOTUNEDTMUTESTEREODATACLKCEL OUTR OUTTUNER UNITDOTUNEDTMUTESTEREOS DATAS CLKS LATR CHR CH: FM: CD Signal Path RCH is omittedPHONOLCDJ301LINPUTLOUTPUTJ302MD/DATM OUT1J201MONITORJ202J203VIDEO 2VIDEO 1V1 IN13V1 OUT15V2 IN9V2 OUT11TV3 LD58VEE16VCC14SW110SW24SW36SW432VIDEO SELECTI

39、C201-5VREGIC202-15V+5V32175104811CONTROLCE13CLK15DI14AUDIO SELECTIC301MUTEQ302S LATS CLKS DATA31EQ AMPIC302MUTEQ304IC407MUTEQ354RY301RELAYDRIVEQ301IC408RV401VOLUMERV402BALANCELCWSLMUPDOWNV-A81SYSTEMCONTROLIC1201 V-B82V-E83V INH8061AUTO STOP62STEREO97TUNER MUTES DATAS CLKS LATDOTUNEDSTEREOTMUTE57DATA

40、58CLOCK56LATCHD: PHONOJ299VIDEOLAUDIOVIDEO 3V3 IN71279411CONTROLCE13CLK15DI14SELECTORIC303S LATS CLKS DATA68LTAPEINPUTLOUTPUTJ303LTV/DBSLJ305VIDEO2INPUTINPUTLOUTPUTLVIDEO1OUTPUTLINPUTJ304TM301ANTENNA4 14 15 13231101269LINPUTDVD/LD10IR LINKDETIC001DVD/LDINPUTOUTPUTINPUTINPUTOUTPUTOUTPUTDVD/LDTV/DBSIN

41、PUT1512321SELECTSWITCHIC10055BCA11109BCAIC100676SWDT111A110B109CABC78SCLK77XLAT2RESET75SRDTDIGITAL AUDIOI/F RECEIVERIC1101D IN47RESET11SWDT40SCLK42XLAT41XO27XI26X110124.576MHz35D OUT29CLK34BCK36LRCK30ERROR38SRDTX130149.152MHzIC1102IC1102IC1305IC1305IC13051310CLOCKDIVIDEIC1403IC1305IC1102IC1108MEMORY

42、IC1302A0-7D0-7LATCHIC1303IC1304A8-15D0-7EMRD5EXTMEM21CLK30SDATA122SDATA227MCLK44SCK43SCLK125SCLK228RCLK42LRCLK126LRCLK229DOLBYDIGITAL AUDIO DECODERIC130141AUDATA040AUDATA139AUDATA2D0-7SCCLK716SCCLKSCD IN6CS18RESET3615SCDOUT17CS20RESET20INTREQ19SCDOUT19INTREQ18SCDINQ1204Q1205IC120267D120114ANALOG/DIG

43、ERRORA0-7D0-7SRAMIC1402SIA117SIB118SIC119XWE74XOE7025 3216202325.HD0HD7D0-7AD0AD721XHDWR35HA0AUDIO DSPIC1401HA015XHDWR9XHDRD10XHDCS14XRST2622XHDRD24XHDCS23HRDY36XRST13HRDY5SOD37SOD6CDTOIC1202 IC1202Q1206Q12075CDTI4CCLK3CS7PD108RY DIRECT PASS2SOACLK199LRCK115BCK01133SOB4SOC27L OUT1LIN-29AUDIO CODECIC

44、1103CDTO44CDTI43CCLK42CS41PD17SDTO9MCLK139BCLK4LRCK5SDTI 16SDTI 27SDTI 38LIN+30IC304IC1104IC110423L OUT3IN14DATA9CLK8LAT1015OUTDATACLKLATIC414IN3DATA9CLK8LAT102OUTDATACLKLATIN1415OUTIC407IC410IC410IN14DATA9CLK8LAT1015OUTDATACLKLATIC406MUTEQ303IC409IC40524R OUT325L OUT2IC1104IC1105IC1105IC1106VOL CON

45、TIC416VOL CONTIC415VOL CONTLEDDRIVEQ120LED VOLMUTECONTQ120185FUN MUTEQ1202Q1203U DATA52DISP DATA55DISP CLK51DISP MR53SREQ10SOTO9SINO87MD289MD090RESETU CLOCKU MREQU SREQSOTOSINOMD2MD0U RESTBA107RY POWERRY POWER48EV STB50EV CLK49EV DATALATCLKDATA84AC MUTE79PROTETOR106RY HP101RY FRONT A102RY FRONT B103

46、RY CENTER105RY WOOFER104RY REARAC MUTEPROTECTORRY HPRY FRONT ARY FRONT BRY CENTERRY WOOFERRY REARC92XO93XIX12014MHz64STOPSTOP: DIGITAL16STR-DE725 11 12 3-3. BLOCK DIAGRAM POWER SECTION RELAYDRIVEQ601LIMITERQ504145156123VEEVCCINMUT+VENF-VE13VCCPOWER AMP(L)IC501L+B-BLIMITERQ505BOOSTERQ506BOOSTERQ507CU

47、R DETQ508PROTECTORQ509,510Q511LIMITERQ6049151211VEEIN+VENF-VE13VCCPOWER AMP(C/W)IC601C+B-BLIMITERQ605BOOSTERQ606BOOSTERQ607CUR DETQ608PROTECTORQ609,610Q611LIMITERQ704MUTEQ501,503145156123VEEVCCINMUT+VENF-VE13VCCPOWER AMP(SL)IC701SL+B-BLIMITERQ705BOOSTERQ706BOOSTERQ707CUR DETQ7088RY602RELAYDRIVEQ546R

48、Y501RELAYDRIVEQ596RY502RELAYDRIVEQ645RY601RELAYDRIVEQ749RY701RELAYDRIVEQ544RY503RELAYDRIVEQ901RY901J501CS(L)S(R)R CHR CHWIRELESSREARSPEAKERCNJ701SURROUNDSPEAKERWOOFERJ701PHONESTM701FRONTSPEAKERTM501R CHR CHPOWERCONTIC9015836DELAY+B SWQ902SWITCHQ747,748D801SWITCHQ618INV SWQ617SWITCHQ613,616SWITCHQ612

49、,615PROTECTORQ547-549F2F1+5.6VF801F802D802-805+B-BIMPEDANCESELECTOR84S501F901D901-904CNP901AC INLR:FM:CDD Signal Path RCH is omittedINW614VCC2+VE3-VE1+18VREGIC7023F803F8041+3.3VREG33+5VREG1IC809+24V-24V15VREG3IC809IC801IC802CNJ901T902MODE CONTROLIC102STOPAAC MUTEPROTECTORREMOTOCONTROLRECEIVERIC10126

50、SIRCSQ101RESETQ10577RESETPOWERS131POWER KEY74F2F116JW92547STOPURESETS-LINKJ2041MUTD1202D12032-15VREGIC40233+15VREGIC40111+12VREGIC40333+5VREGIC4041-15V+15VTU +12VTU +5V+32V REG+32VQ801D808F8051+3.3VREG3IC803D5VD3.3VD3.3VT90191LED ON/OFFDOUT3RY HPRY FRONT AFRONT BRY CENTERRY WOOFERRY REAR58URESETBABU