Sony-STRDE945-rec-sm 维修电路原理图.pdf

SERVICE MANUALFM STEREO/FM-AM RECEIVERUS ModelCanadian ModelSTR-DE845/DE945E ModelAustralian ModelChinese ModelPX ModelSTR-DE845SPECIFICATIONSSTR-DE845/DE945Photo: STR-DE945Manufactured under license from Dolby labora-tories. “Dolby”, “AC-3”, “Pro Logic” and the double-D symbol ; are trademarks of Dolby Laborato-ries.Manufactured under license from Digital TheaterSystems, Inc. US Pat. No. 5,451,942 and otherworldwide patents issued and pending. “DTS” and “DTS Digital Surround” are trademarks of Digi-tal Theater Systems, Inc. Continued on next page AUDIO POWERSPECIFICATIONSPOWER OUTPUT ANDTOTAL HARMONICDISTORTION:With 8 ohm loads, bothchannels driven, from 20 -20,000 Hz; rated 110 watts(STR-DE945) and 100 watts(STR-DE845) per channelminimum RMS power,with no more than 0.09 %total harmonic distortionfrom 250 milliwatts torated output (USA modelonly).Amplifier sectionPOWER OUTPUTModels of area code U, CARated Power Output at Stereo Mode(8 ohms 20 Hz 20 kHz, THD 0.09 %)STR-DE945:110 W + 110 WSTR-DE845:100 W + 100 WReference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-DE945:FRONT:1)110 W + 110 WCENTER1): 110 WREAR1):110 W + 110 WSTR-DE845:FRONT1):100 W + 100 WCENTER1): 100 WREAR1):100 W + 100 WModels of other area codeSTR-DE845:Rated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)100 W + 100 W2)90 W + 90 W3)Reference Power Output(8 ohms 1 kHz, THD 0.7 %)FRONT1):100 W + 100 WCENTER1): 100 WREAR1):100 W + 100 W(8 ohms 20 Hz 20 kHz, THD 0.09 %)FRONT1):95 W + 95 WCENTER1): 95 WREAR1):95 W + 95 W(8 ohms 1 kHz, THD 10 %)FRONT1):135 W + 135 WCENTER1): 135 WREAR1):135 W + 135 W1) Depending on the sound field settings andthe source, there may be no sound output.2) Measured under the following conditions:Area codePower requirementsAU, E240 V AC, 50 HzCN, SP230 V AC, 50 Hz3) Measured under the following conditions:Area codePower requirementsCN220 V AC, 50 HzFrequency responsePHONO: RIAAequalization curve0.5 dBCD, TAPE, MD/DAT,MD/TAPE, DVD/LD, TV/SAT,VIDEO 1, 2, andVIDEO 3:10 Hz 50 kHz+0.5/2 dB (withsound field,equalizer, and bassboost bypassed)Inputs (Analog)PHONO:Sensitivity: 2.5 mVImpedance: 50kilohmsS/N4): 86 dB(A, 2.5 mV5)5.1CH INPUT, CD,TAPE, MD/DAT,MD/TAPE, DVD/LD, TV/SAT, VIDEO1, 2, and VIDEO 3:Sensitivity: 150 mVImpedance:50 kilohmsS/N4): 96 dB(A, 150 mV5)4) INPUT SHORT5) Weighted network, input levelInputs (Digital)DVD/LD IN(Coaxial):Sensitivity: Impedance: 75 ohmsS/N: 100 dB(A, 20 kHz LPF)DVD/LD IN, TV/SATIN, MD/DAT IN(Optical):Sensitivity: Impedance: S/N: 100 dB(A, 20 kHz LPF)OutputsTAPE, MD/DAT, MD/TAPE; VIDEO 1, 2(AUDIO OUT):Voltage: 150 mV,Impedance:1 kilohmsSUB WOOFER:Voltage: 2 VImpedance:1 kilohmsPHONES:Accepts low- andhigh-impedanceheadphonesBASS BOOST+6 dB at 70 HzSampling Frequency48 kHzEQBASS:100 Hz1.0 kHz(21 steps)MID:500 Hz5.0 kHz(21 steps)TREBLE:1.0 kHz10 kHz(21 steps)Gain levels: 10 dB, 1 dB stepRadioFans.CN 收音机爱 好者资料库2SAFETY-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 NUMBERS AP-PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.ATTENTION 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.Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam-aged by heat.Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C duringrepairing. Do not touch the soldering iron on the same conductor of thecircuit board (within 3 times). Be careful not to apply force on the conductor when soldering orunsoldering.FM tuner sectionTuning range 87.5 - 108.0 MHzAntenna terminals75 ohms, unbalancedSensitivityMono: 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 tuningscale:530 1710 kHz6)With 9-kHz tuningscale:531 1710 kHz6)Models of area code AU, CN, SPWith 9-kHz tuningscale:531 1602 kHzModels of area code EWith 10-kHz tuningscale:530 1610 kHz6)With 9-kHz tuningscale:531 1602 kHz6)AntennaLoop antennaUsable sensitivity50 dB/m (at 1,000 kHzor 999 kHz)S/N54 dB (at 50 mV/m)Harmonic distortion0.5 % (50 mV/m,400 kHz)SelectivityAt 9 kHz: 35 dBAt 10 kHz: 40 dB6) You can change the AM tuning scale to9 kHz y 10 kHz. After tuning in any AMstation, turn off the receiver. Hold down theTUNING + button and press the ?/1 button.All preset stations will be erased when youchange the tuning scale. To reset the scaleto 10 kHz (or 9 kHz), repeat the procedure.Video sectionInputsVideo: 1 Vp-p 75 ohmsS-video:Y: 1 Vp-p 75 ohmsC: 0.286 Vp-p75 ohmsOutputsVideo: 1 Vp-p 75 ohmsS-video:Y: 1 Vp-p 75 ohmsC: 0.286 Vp-p75 ohmsAC outletsModels of area code U,CA2 switched,total 120 W/1AModels of area codeAU, SP1 switched,total 100 WModels of area code E,CN2 switched,total 100 WDimensions 430 158 378 mm(17 61/4 15 in.)including projectingparts and controlsMass (Approx.)10.3 kg (22 lb 12 oz)Supplied accessories FM wire antenna (1) AM loop antenna (1) LR6 (size-AA) alkaline batteries (3)Models of area code U, CA only Audio/video/control Sconnecting cord (1) Control S connecting cord (1)STR-DE945 only Remote commander RM-LJ304(remote) (1)STR-DE845 only Remote commander RM-LP204(remote) (1)Design and specifications are subjectto change without notice.GeneralSystemTuner section:PLL quartz-lockeddigital synthesizersystemPreamplifier section:Low-noise NF typeequalizerPower amplifiersection:Pure-complementarySEPPPower requirementsModels of area code U,CA120 V AC, 60 HzModels of area codeCN, SP220 230 V AC,50/60 HzModels of area code AU240 V AC, 50 HzModels of area code E120/220/240 V AC,50/60 HzPower consumptionModels of area code USTR-DE945: 290 WSTR-DE845: 280 WModels of area code CASTR-DE945: 345 VASTR-DE845: 335 VAModels of area codeCN, SPSTR-DE845: 220 WModels of area code AUSTR-DE845: 230 WModels of area code ESTR-DE845: 320 W AbbreviationAU : Australian modelCA : Canadian modelCN : Chinese modelMY: Malaysia modelSP : Singapore modelU: US modelRadioFans.CN 收音机爱 好者资料库3MODEL IDENTIFICATION Rear View Part No.Fig. A.Using an AC voltmeter to check AC leakage.1.5 k0.15 FACvoltmeter(0.75 V)To Exposed MetalParts on SetEarth GroundSAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-ing safety check 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 as described below.LEAKAGE TESTThe 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 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 a VOMor battery-operated AC voltmeter. The “limit” indication is 0.75V, so analog meters must have an accurate low-voltage scale.The Simpson 250 and Sanwa SH-63Trd are examples of a pas-sive VOM that is suitable. Nearly all battery operated digitalmultimeters that have a 2 V AC range are suitable. (See Fig. A)TABLE OF CONTENTS1.GENERAL.42.DISASSEMBLY.63.TEST MODE.94.DIAGRAMS4-1.Block Diagram MAIN Section (1/2) . 114-2.Block Diagram MAIN Section (2/2) . 124-3.Block Diagram DISPLAY/POWER SUPPLY Section . 134-4.Note for Printed Wiring Boards and Schematic Diagrams . 144-5.Schematic Diagram DIGITAL Board (1/3) . 154-6.Schematic Diagram DIGITAL Board (2/3) . 164-7.Schematic Diagram DIGITAL Board (3/3) . 174-8.Printed Wiring BoardDIGITAL Board (Component Side) . 184-9.Printed Wiring BoardDIGITAL Board (Conductor Side) . 194-10. Printed Wiring BoardsVIDEO/JOINT (1) (H) Boards (DE845) . 204-11. Schematic DiagramVIDEO/JOINT (1) (H) Boards (DE845) . 214-12. Printed Wiring Boards OSD/OSD JOINT (H) Boards (DE945) . 224-13. Schematic Diagram OSD/OSD JOINT (H) Boards (DE945) . 234-14. Printed Wiring Board AU SW Board . 244-15. Schematic Diagram AU SW Board . 254-16. Printed Wiring Board S-VIDEO Board . 264-17. Schematic Diagram S-VIDEO Board . 274-18. Printed Wiring Board DISPLAY Board . 284-19. Schematic Diagram DISPLAY Board . 294-20. Printed Wiring Board MAIN Board . 304-21. Schematic Diagram MAIN Board (1/3) . 314-22. Schematic Diagram MAIN Board (2/3) . 324-23. Schematic Diagram MAIN Board (3/3) . 334-24. Printed Wiring Boards H.P/MUTING/POWER/ROTARY/VIDEO 3(DE945)/VOL/V. SWITCH (E) Boards . 344-25. Schematic Diagram H.P/MUTING/POWER/ROTARY/VIDEO 3(DE945)/VOL/V. SWITCH (E) Boards . 354-26. Printed Wiring Boards BIAS (C)/BIAS (L)/BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards . 364-27. Schematic Diagram BIAS (C)/BIAS (L)/BIAS (R)/BIAS (LS)/BIAS (RS)/5.1 IN Boards . 374-28. Printed Wiring Boards DC (1)/DC (2) Boards . 384-29. Schematic Diagram DC (1)/DC (2) Boards . 394-30. Printed Wiring Boards AC/SP Boards . 404-31. Schematic Diagram AC/SP Boards . 414-32. IC Pin Function Description . 465.EXPLODED VIEWS. 566.ELECTRICAL PARTS LIST. 59ModelDE945:US modelDE945:Canadian modelDE845:US modelDE845:Canadian modelMalaysia and Singapore modelsChinese modelAustralian modelE and PX modelsPart No.4-226-871-0s4-226-871-1s4-226-871-3s4-226-871-4s4-226-871-5s4-226-871-6s4-226-871-7s4-226-871-8s4SECTION 1GENERALLocation of controls Front view 1 I/1 button2 Function Buttons3 INPUT MODE button4 5.1CH INPUT button8 DIMMER button9 DISPLAY buttonq; A. F. D button/indicator2CH button/indicatorMODE button/indicatorqa CINEMA STUDIO EX. A C buttonsqs MULTI CHANNEL DECORDING indicatorqd PRESET TUNING +/ buttonsSHIFT buttonTUNING +/ buttonsFM/AM buttonFM MODE buttonqf 2ND AUDIO button (STR-DE945)qg BASS BOOST buttonqh EQUALIZER buttonqj SET UP buttonqk NAME buttonql ENTER buttonw; cursor buttons ()wa Jog dialws EQ buttonwd SUR buttonwf LEVEL button5 MASTER VOLUME control6 MUTING button7 SPEAKERS buttonPHONE jack+PHONESSPEAKERSDIMMERDISPLAYINPUT MODEVIDEO 1 VIDEO 2 VIDEO 3 DVD/LDTV/SATCINEMA STUDIO EX.MULTI CHANNEL DECODINGTAPEMD/DATCDTUNERPHONO5.1CH INPUTABOFFA+BSOUND FIELDA.F.D.ABC2CHMODELEVELSUREQSET UPMASTER VOLUMEBASS BOOSTEQUALIZERNAMEENTER010VIDEO 3 INPUTMUTINGBASSBOOSTPRESETTUNINGTUNING+MEMORYFM/AMFM MODE2ND AUDIOSHIFTEQUALIZERVIDEOL AUDIO R5.1CHINPUT123 45674+PHONESSPEAKERSDIMMERDISPLAYINPUT MODEVIDEO 1 VIDEO 2 VIDEO 3 DVD/LDTV/SATCINEMA STUDIO EX.MULTI CHANNEL DECODINGTAPEMD/DATCDTUNERPHONO5.1CH INPUTABOFFA+BSOUND FIELDA.F.D.ABC2CHMODELEVELSUREQSET UPMASTER VOLUMEBASS BOOSTEQUALIZERNAMEENTER010VIDEO 3 INPUTMUTINGBASSBOOSTPRESETTUNINGTUNING+MEMORYFM/AMFM MODE2ND AUDIOSHIFTEQUALIZERVIDEOL AUDIO R8 90qaqsqdqfqgqjqlqhqkw;wawdwf ws(STR-DE945 only)(STR-DE845 only)51 ANTENNA terminal2 5.1CH INPUT jack3 DIGITAL jackOPTICAL jackCOAX jack4 SPEAKERS terminalFRONT (A/B) terminalREAR terminalCENTER terminal5 SUB WOOFER jack6 IMPEDANCE SELECTOR switch7 AC POWER cord8 AC OUTLET9 CONTROL A1II jackq; 2ND AUDIO OUT jack Rear View qa VIDEO 1 jackqs VIDEO 2 jackqd DVD/LD jackqf TV/SAT jackqg TAPE jack (STR-DE945)qh MD/DAT jack (STR-DE945)MD/TAPE jack (STR-DE845)qj CD jackqk PHONO jackql MONITOR jack4 8 BARLRL+IMPEDANCE USE 4 168 16SPEAKERSINLROUTSIGNALGNDCOAXIALAMUUANTENNATAPEIMPEDANCE SELECTORFRONTINPHONOINCD2ND AUDIO OUTREARFRONTCENTERMONITORINOUTMD/DATAUDIO INVIDEO INS-VIDEOINVIDEO OUTS-VIDEOOUTVIDEO INCTRL SOUTVIDEO OUTVIDEO OUTCTRL SOUTVIDEO INS-VIDEOINS-VIDEOINVIDEO INS-VIDEOOUTCTRL SSTATUS INCTRL SINAUDIO OUTVIDEO 1AUDIO INTV/SATAUDIO INDVD/LDAUDIO INAUDIO OUTVIDEO 2FM75+RLRLAC OUTLETSUB WOOFERAUDIOOUTCONTROL A1 DVD/LDINDVD/LDINTV/SATINMD/DATINMD/DATOUTDIGITALOPTICALCOAXLRREARFRONTCENTERSUB WOOFER5.1CH INPUT4856231qfqdqsqaq;9qgqhqjqkql7Setting (E model)a voltage selectorIf your receiver has a voltage selector on the rear panel,check that the voltage selector on the rear panel of thereceiver is set to the local power supply voltage. If not,use a screwdriver to set the selector to the correct positionbefore connecting the AC power cord to a wall outlet.220V240V120VVOLTAGE SELECTOR6CASE5.1 IN BOARD, AU SW BOARD, TUNERNote: Follow the disassembly procedure in the numerical order given.SECTION 2DISASSEMBLY1 two screws3 case221 two screws1 two screws3 four screws(BVTP 3X8 )1 wire (flat type) (15 core)(CN1)4 tuner5 5.1 IN board,AU SW board2 connector(CNP10)7VIDEO/OSD/JOINT (1) (H)/OSD JOINT (H)/S-VIDEO/DIGITAL BOARDHEAT SINK1 wire (flat type) (15 core)(CN51)5 bracket (digital)1 wire (flat type) (21 core)(CN55)4 DIGITAL board8 VIDEO board (DE845)/OSD board (DE945), JOINT (1) (H) board (DE845)/OSD JOINT (H) board (DE945)S-VIDEO board3 screw(BVTP 3X8 )2 three screws(BVTP 3X8 )7 seven screws(BVTP 3X8 )6 connector(CNS213)DE9451 five connectors(CNP511, 611, 561, 711, 761)3 two screws(BVTP 3X6)4 screw(BVTP 3X8 )4 screw(BVTP 3X8 )2 ten screws5 heat sink8VOL BOARD, MAIN BOARD5 four screws(BVTP 3X8 )2 knob3 washer7 three screws(BVTP 3X8 )6 connector(CNS305)8 MAIN board4 VOL board1 wire (flat type) (23 core)(CNS111)DE9459SECTION 3TEST MODEFluorescent Indicator Tube Test ModeAll 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:1.While depressing, the A.F.D and the DIMMER buttons si-multaneously, press the power /1 button to turn on the mainpower.2.All segments turn on at the same time, then each segment turnson press the A.F.D button.Factory Set ModeAll preset contents are reset to the default setting.Procedure:1.While depressing the SET UP, and the DIMMER buttonssimultaneously, press the power /1 button to turn on themain power. The message Factry Set appears and the presentcontents are reset to the default values.All Clear ModeAll preset contents are cleared when this mode is activated. Usethis mode before returning the product to clients upon completionof repair.Procedure:1.While depressing the SET UP button simultaneously, pressthe power /1 button to turn on the main power. The ma-chine enters the DEMO mode.DEMO mode: Wait a while, then the demonstration starts. Ifthe power /1 button is pressed often the demonstration hasstarted, the power is turned off, and the demonstration resumesif the power /1 button is pressed again.ALL CLEAR mode; Press the A.F.D, SOUND FIELD MODE+ , and /1 buttons.Sound Field Clear ModeThe preset sound field is cleared when this