Sony-STRDB780-rec-sm 维修电路原理图.pdf

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1、SERVICE MANUALFM STEREO FM-AM RECEIVERSPECIFICATIONSSTR-DA1ES/DB780Photo: STR-DA1ESVer 1.0 2002.069-874-062-01Sony Corporation2002F0500-1Home Audio CompanyC 2002.06Published by Sony Engineering CorporationUS ModelCanadian ModelSTR-DA1ESAEP ModelUK ModelE ModelChinese ModelSTR-DB780 Continued on next

2、 page This receiver incorporates Dolby* Digital and ProLogic Surround and the DTS* Digital SurroundSystem.* Manufactured under license from DolbyLaboratories.“Dolby”, “Pro Logic” and the double-D symbol aretrademarks of Dolby Laboratories.*“DTS” and “DTS Digital Surround” are registeredtrademarks of

3、 Digital Theater Systems, Inc.1) Depending on the sound field settings and thesource, there may be no sound output2) Measured under the following conditions:Area codePower requirementsSP, CEL, CEK230 V AC, 50 HzTW110 V AC, 60 Hz3) Measured under the following conditions:Area codePower requirementsCN

4、, KR220 V AC, 50 HzFrequency responsePHONOCD/SACD, MD/TAPE, TV/SAT,DVD/LD, VIDEO 1, 2,3Inputs (Analog)PHONOMULTI CH IN, CD/SACD, MD/TAPE,DVD/LD, TV/SAT,VIDEO 1, 2, 34) INPUT SHORT5) Weighted network, input levelInputs (Digital)ASSIGNABLECOAXIAL IN (DVD/LD CD/SACD)DVD/LD, TV/SAT,MD/TAPE (Optical)RIAA

5、 equalization curve0 5 dB10 Hz 100 kHz+0 5/2 dB (with soundfield and equalizerbypassed)Sensitivity: 2 5 mVImpedance: 50 kilohmsS/N4): 86 dB (A, 2 5 mV5)Sensitivity: 150 mVImpedance: 50 kilohmsS/N4): 100 dB(A, 150 mV5)AUDIO POWER SPECIFICATIONSPOWER OUTPUT AND TOTALHARMONIC DISTORTION:(Models of area

6、 code U only)With 8 ohm loads, both channels driven, from20 20,000 Hz; rated 100 watts per channelminimum RMS power, with no more than0.05 % total harmonic distortion from250 milliwatts to rated output.Amplifier sectionPOWER OUTPUTModels of area code U, CARated Power Output at Stereo Mode(8 ohms 20

7、Hz 20 kHz, THD 0 09 %)100 W + 100 W(4 ohms 20 Hz 20 kHz, THD 0 09 %)80 W + 80 WReference Power Output(8 ohms 20 Hz 20 kHz, THD 0 09 %)FRONT1):100 W + 100 WCENTER1): 100 WSURR1): 100 W + 100 W(4 ohms 20 Hz 20 kHz, THD 0 09 %)FRONT:1) 80 W + 80 WCENTER1): 80 WSURR1): 80 W + 80 WModels of other area co

8、desRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0 7 %)100 W + 100 W2)90 W + 90 W3)(4 ohms 1 kHz, THD 0 7 %)90 W + 90 W2)80 W + 80 W3)Impedance: 75 ohmsS/N: 100 dB(A, 20 kHz LPF)S/N: 100 dB(A, 20 kHz LPF)Reference Power Output2)(8 ohms 1 kHz, THD 0 7 %)FRONT1): 100 W + 100 WCENTER1): 100 WSURR

9、1): 100 W + 100 W(4 ohms 1 kHz, THD 0 7 %)FRONT1): 80 W + 80 WCENTER1): 80 WSURR1): 80 W + 80 W(8 ohms 20 Hz 20 kHz, THD 0 09 %)FRONT1): 90 W + 90 WCENTER1): 90 WSURR1): 90 W + 90 W(4 ohms 20 Hz 20 kHz, THD 0 09 %)FRONT1): 75 W + 75 WCENTER1): 75 WSURR1): 75 W + 75 WRadioFans.CN 收音机爱 好者资料库2STR-DA1ES

10、/DB780OutputsMD/TAPE (RECOUT), VIDEO 1, 2(AUDIO OUT)FRONT L/R,CENTER,SURROUND L/R,SUB WOOFER(Models of area codeU, CA only)SUB WOOFER(Models of other areacodes)EQBASS:99 Hz1 0 kHz(21 steps)TREBLE:1 0 kHz10 kHz(23 steps)Gain levels:10 dB, 0 5 dB stepFM tuner sectionTuning range87 5 - 108 0 MHzAntenna

11、 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 k

12、HzAM tuner sectionTuning rangeModels of area code U, CAWith 10-kHz tuning scale: 530 1,710 kHz6)With 9-kHz tuning scale:531 1,710 kHz6)Models of area code CN, SP, CEL, CEK, TW,KRWith 9-kHz tuning scale:531 1,602 kHzAntennaLoop antennaUsable sensitivity50 dB/m (at 1,000 kHz or999 kHz)S/N54 dB (at 50

13、mV/m)Harmonic distortion0 5 % (50 mV/m,400 Hz)SelectivityAt 9 kHz:35 dBAt 10 kHz:40 dB6) You can change the AM tuning scale to 9 kHz or10 kHz After tuning in any AM station, turn offthe receiver Hold down TUNING + and press?/1 All preset stations will be erased when youchange the tuning scale To res

14、et the scale to10 kHz (or 9 kHz), repeat the procedureVideo sectionInputs/OutputsVideo:1 Vp-p, 75 ohmsS-video:Y: 1 Vp-p, 75 ohmsC: 0 286 Vp-p, 75 ohmsCOMPONENT VIDEO(Except for models of area code CEL, CEK):Y: 1 Vp-p, 75 ohmsB-Y: 0 7 Vp-p, 75 ohmsR-Y: 0 7 Vp-p, 75 ohmsVoltage: 150 mVImpedance: 10 ki

15、lohmsVoltage: 2 VImpedance: 1 kilohmsVoltage: 2 VImpedance: 1 kilohmsGeneralPower requirementsArea codePower requirementsU, CA120 V AC, 60 HzCEL, CEK230 V AC, 50/60 HzCN, SP, KR220 230 V AC, 50/60 HzTW110 V AC, 60 HzPower consumptionArea codePower consumptionU280 WCA330 VACEL, CEK290 WCN, SP, KR290

16、WTW290 W (MAX 500W)Power consumption (during standby mode)0 5 WAC outletsArea codeAC outletsU, CA1 switched, 120 W/1A MAXSP, TW1 switched, 100 W MAXDimensions430 161 400 mmincluding projecting partsand controlsMass (Approx.)12 5 kgSupplied accessoriesFM wire antenna (1)AM loop antenna (1)Models of a

17、rea code U, CA;Remote commander RM-PP506L (1)R6 (size-AA) batteries (2)Models of other area codes;Remote commander RM-U305C (1)R6 (size-AA) batteries (2)Design and specifications are subject to changewithout noticeRadioFans.CN 收音机爱 好者资料库3STR-DA1ES/DB780Notes on chip component replacement Never reuse

18、 a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam-aged by heat.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

19、 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 e

20、xposed 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 theseinstr

21、uments.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.T

22、he 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)ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0SUR LES DIAGRAMMES SCHMATIQUES

23、ET LA LISTEDES PICES SONT CRITIQUES POUR LA SCURITDE FONCTIONNEMENT. NE REMPLACER CES COM-POSANTS QUE PAR DES PICES SONY DONT LESNUMROS SONT DONNS DANS CE MANUEL OUDANS LES SUPPLMENTS PUBLIS PAR SONY.SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTEDLINE WITH MARK 0 ON THE SC

24、HEMATIC DIAGRAMSAND IN THE PARTS LIST ARE CRITICAL TO SAFEOPERATION. REPLACE THESE COMPONENTS WITHSONY PARTS WHOSE PART NUMBERS APPEAR ASSHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.4STR-DA1ES/DB7801.SERVICING NOTES.52.GENERAL.63.DISASSEMBLY3-1.Disassembly Flow .73-2.Case (414535) .83-3

25、.S-VIDEO board, VIDEO Board and Tuner.83-4.VIDEO.AU Board .93-5.DIGITAL Board .93-6.MAIN Board . 104.TEST MODE. 115.DIAGRAMS5-1.Block Diagram TUNER/VIDEO INPUT Section . 135-2.Block Diagram AUDIO DSP Section . 145-3.Block Diagram AUDIO CONTROL Section . 155-4.Block Diagram POWER AMP Section . 165-5.

26、Block Diagram DISPLAY/KEY CONTROL Section . 175-6.Block Diagram POWER SUPPLY Section . 185-7.Note for Printed Wiring Boardsand Schematic Diagrams . 195-8.Schematic Diagram DIGITAL (1/3)/V-3 OPT Boards . 215-9.Schematic Diagram DIGITAL Board (2/3) . 225-10. Schematic Diagram DIGITAL Board (3/3) . 235

27、-11. Printed Wiring Board DIGITAL Board (Component Side) . 245-12. Printed Wiring Boards DIGITAL (Conductor Side)/V-3 OPT Boards . 255-13. Printed Wiring Board VIDEO Board . 265-14. Schematic Diagram VIDEO Board . 275-15. Printed Wiring Boards S-VIDEO/VIDEO 3/VIDEO.AU Boards . 285-16. Schematic Diag

28、ram S-VIDEO/VIDEO 3/VIDEO.AU Boards . 295-17. Printed Wiring Board MAIN Board . 305-18. Schematic Diagram MAIN Board (1/3) . 315-19. Schematic Diagram MAIN Board (2/3) . 325-20. Schematic Diagram MAIN Board (3/3) . 335-21. Printed Wiring Board BIAS Board . 345-22. Schematic Diagram BIAS Board . 355-

29、23. Printed Wiring Boards H.P/PRE/SPOUT Boards . 365-24. Schematic Diagram H.P/PRE/SPOUT Boards . 375-25. Printed Wiring Board DISPLAY Board . 385-26. Schematic Diagram DISPLAY Board . 395-27. Printed Wiring Boards KEY/MUTING/POWER Boards . 405-28. Schematic Diagram KEY/MUTING/POWER Boards . 415-29.

30、 Printed Wiring Boards AC/DC 1/DC 2/PR 1/SEC 1 Boards . 425-30. Schematic Diagram AC DC 1/DC 2/PR 1/SEC 1 Boards . 435-31. IC Pin Function Description . 496.EXPLODED VIEWS6-1.Case Section . 556-2.Front Panel Section-1. 566-3.Front Panel Section-2. 576-4.Chassis Section-1 . 586-5.Chassis Section-2 .

31、596-6.Chassis Section-3 . 606-7.Chassis Section-4 . 616-8.BIAS Board Section. 626-9.MAIN Board Section . 636-10. Foot Section . 647.ELECTRICAL PARTS LIST. 65TABLE OF CONTENTS5STR-DA1ES/DB780SECTION 1SERVICING NOTES MODEL IDENTIFICATION Back Panel PART No.ModelPART No.DA1ES : US model4-240-601-0DB780

32、 : AEP and UK models4-240-601-1DB780 : Singapore andMalaysia models4-240-601-2DB780 : Taiwan model4-240-601-3DB780 : Korean model4-240-601-4DB870 : Chinese model4-240-601-5DA1ES : Canadian model4-240-601-6Connect jig (extension cable J-2501-208-A)to the MAIN board (CN806, CN807) and DIGITAL board (C

33、N1102, CN1103).Note:The power cord can be used unplugged from theback panel though, as it is hard to do it,it is easier to prepare other power cord anduse it as a jig.DIGITAL boardMAIN boardpower cordSERVICE POSITIONIn checking the DIGITAL board, prepare jig (extension cable J-2501-208-A: 200 mm 21

34、core).6STR-DA1ES/DB780SECTION 2GENERALThis section is extracted frominstruction manual.+12 34567890qs qaqdqfqhqjqkqgql w;waws wdwfwhwlwke;wgwjeaefesedAUTO DEC qsCINEMA STUDIO EX A/B/C qgCursor buttons (/) wh CUSTOMIZE wl Digital Cinema Sound indicator3DIMMER ed DISPLAY ql Display 4DOOR OPEN 7ENTER w

35、gEQ wj EQUALIZER e; FM/AM qf FM MODE es FUNCTION 6 INPUT MODE 9 IR receptor 2Jog dial wf LEVEL wd MASTER VOLUME 5 MEMORY w; MODE +/ 0 MULTI CH DIRECT 8 NORMAL SURR (;PLII) qhPHONES jack qjPRESET TUNING +/ qd RDS PTY ea (28)(Models of area code CEL, CEKonly)SET UP ws SLEEP ea (Except for models of ar

36、ea codeCEL, CEK)SPEAKERS ON/OFF qk SURR wk TUNING +/ wa (Except for models of area codeCEL, CEK)TUNING/PTY SELECT +/ wa(Models of area code CEL, CEKVIDEO 3 INPUT jacks ef 2CH ST qa ?/1 (power) 1LOCATION OF CONTROLS Front Panel 7STR-DA1ES/DB780 This set can be disassembled in the order shown below.3-

37、1.DISASSEMBLY FLOWSECTION 3DISASSEMBLYSET3-3. S-VIDEO BOARD, VIDEO BOARD AND TUNER(Page 8)3-2. CASE (414535)(Page 8)3-5. DIGITAL BOARD(Page 9)3-6. MAIN BOARD(Page 10)3-4. VIDEO.AU BOARD(Page 9)8STR-DA1ES/DB780Note: Follow the disassembly procedure in the numerical order given.3-2.CASE (414535)3-3.S-

38、VIDEO BOARD, VIDEO BOARD AND TUNER1two flat head screws1two flat head screws1two flat head screws1two flat head screws3case (414535)221connector(CN853)4S-video board, video board2wire (flat type) (11 core)(CN303)5wire (flat type) (11 core)(except DB780: AEP, UK models)wire (flat type) (15 core)(DB78

39、0: AEP, UK models)3six screws (BV/RING)6three screws (BV/RING)3two screws (BV/RING)(except DB780: AEP, UK models)7tuner9STR-DA1ES/DB7803-4.VIDEO.AU BOARD1wire (flat type) (9 core)(CN201)4video.AU board2connector(CN202)3two screws (BV/RING)3screw (BV/RING) (DB780: AEP, UK models)3-5.DIGITAL BOARD1wir

40、e (flat type) (31 core)(CNS4)2four connectors(CN1109, CNP5, CNP6, CNP9)6five screws(BV/RING)8digital board7two connectors(CN1102, CN1103)4bracket (digital 3)5screw(BVTP3 8)3screw(BVTP3 8)3screw(BVTP3 8)Note:When installing the digital board (CNS4), connecting thewire (flat type) (31core) to the digi

41、tal board beforehandimproves the operatability.10STR-DA1ES/DB7803-6.MAIN BOARD3two screws(BVTP3 8)3two screws(BVTP3 8)4screw (BVTP3 8)2five screws (BV/RING)1three connectors(CN801, CN803, CN805)1connector (CN902)56connector (CN809)7ten screws(transistor)6five connectors(CN631, CN431, CN481, CN531, C

42、N581)9main board8heat sink11STR-DA1ES/DB780SOFTWARE VERSION MODEWhen this mode is used, the destination and the software versionnumber are displayed.Procedure:1.While pressing the ENTER and AUTO DEC. buttons, pressthe I/1button to turn on the main power.2.The destination and the software version num

43、ber appear.KEY CHECK MODEWhen this mode is used, the destination and the software versionnumber are displayed.Procedure:1.While pressing the FM/AM and CINEMA STUDIO EX Cbuttons, press the I/1button to turn on the main power.2.The message “REST 30” appears.3.Every pressing of any button other than th

44、e I/1button countsdown the buttons. The buttons which are already counted onceare not counted again.4.When all buttons are pressed, the message “REST 00” appears.SECTION 4TEST MODETUNER FACTORY PRESET MODEAll preset contents are reset to the default setting.Procedure:1.While pressing the DIMMER and

45、SET UP buttons, pressthe I/1button to turn on the main power.2.The message “FACTORY” appears and the present contentsare reset to the default values.TUNER AM STEP CHANGE (9 kHz/10 kHz) MODE(Except STR-DB780: AEP and UK models)Either the 9 kHz step or 10 kHz step can be selected for the AMchannel ste

46、p.Procedure:1.While pressing the PRESET TUNING + or TUNING +button, press the I/1button to turn on the main power.2.Either the message “9 k STEP” or “10 k STEP” appears. Se-lect the desired step.TUNER AUTOBETICAL TUNING MODE(STR-DB780: AEP and UK models)Procedure:1.While pressing the MEMORY button,

47、press the I/1buttonto turn on the main power.2.The message “AUTO-BETICAL SELECT” appears and scansand stores all the FM and FM RDS stations in the broadcastarea.3.When done, the message “FINISH” appears.SOUND FIELD CLEAR MODEThe preset sound field is cleared when this mode is activated. Usethis mode

48、 before returning the product to clients upon completionof repair.Procedure:1.While pressing the MODE + button, press theI/1button toturn on the main power.2.The message “SF. CLR.” appears and initialization isperformed.ALL CLEAR MODEAll preset contents are cleared when this mode is activated. Useth

49、is mode before returning the product to clients upon completionof repair.Procedure:1.While pressing the AUTO DEC. and MODE + buttons, pressthe I/1button or press the I/1button for more than fiveseconds to turn on the main power.2.The message “MEMORY CLEARED !” appears and thememories are reset to th

50、e default values.FLUORESCENT INDICATOR TUBE PATTERNCHECK MODEAll fluorescent segments are tested. When this test is activated, allsegments turn on at the same time, then each segment turns on oneafter another.Procedure:1.While pressing the DISPLAY and ENTER buttons, presstheI/1button to turn on the