Sony-STRDE485-rec-sm 维修电路原理图.pdf

1SERVICE MANUALUS ModelCanadian ModelE ModelAustralian ModelChinese ModelSTR-DE485AEP ModelUK ModelSTR-DE485ESTR-DE485/DE485EFM STEREO/FM-AM RECEIVERAUDIO POWER SPECIFICATIONSPOWER OUTPUT AND TOTALHARMONIC DISTORTION:With 8 ohm loads, both channels driven, from40 20,000 Hz; rated 80 watts per channelminimum RMS power, with no more than0.09 % total harmonic distortion from 250milliwatts to rated output (STR-DE485 areacode US only).Amplifier sectionPOWER OUTPUTModels of area code US, CNDRated Power Output at Stereo Mode(8 ohms 40 Hz 20 kHz, THD 0.09 %)STR-DE485:80 W + 80 WReference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-DE485:FRONT 1) : 80 W/chCENTER 1) : 80 WSURR 1) : 80 W/chModels of area code AEP, UKRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-DE485E80 W + 80 W 2)Reference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-DE485EFRONT 1) : 80 W/chCENTER 1) : 80 WSURR 1) : 80 W/chSPECIFICATIONSModels of other area codeRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)80 W + 80 W 2)Reference Power Output 2)(8 ohms 1 kHz, THD 10 %)FRONT 1) : 100 W/chCENTER 1) : 100 WSURR 1) : 100 W/ch1) Depending on the sound field settings and thesource, there may be no sound output.2) Measured under the following conditions:Area codePower requirementsE, AUS240 V AC, 50 HzSP, AEP, UK230 V AC, 50 HzTW110 V AC, 60 HzMX120 V AC, 60 HzFrequency responseMULTI CH IN10 Hz 50 kHz(STR-DE485 only), CD,+0.5/2 dB (with soundMD/TAPE, DVD/LD,field, and tone bypassed)VIDEO 1, 2Inputs (Analog)MULTI CH INSensitivity: 250 mV(STR-DE485 only), CD,Impedance: 50 kilohmsMD/TAPE, DVD/LD,S/N 3) : 96 dBVIDEO 1, 2(A, 250 mV 4) )3) INPUT SHORT (with sound field and tonebypassed).4) Weighted network, input level.Ver 1.1 2003. 079-873-587-022003G04-1 2003.07Sony CorporationHome Audio CompanyPublished by Sony Engineering CorporationPhoto: STR-DE485Manufactured under license from Dolby Laboratories.“Dolby”, “Pro Logic” and the double-D symbol aretrademarks of Dolby Laboratories.“DTS” and “DTS Digital Surround” are registeredtrademarks of Digital Theater Systems, Inc. Continued on next page RadioFans.CN 收音机爱 好者资料库2STR-DE485/DE485EInputs (Digital)DVD/LD (Coaxial)Sensitivity: Impedance: 75 ohmsS/N: 100 dB(A, 20 kHz LPF)VIDEO 2 (Optical)Sensitivity: Impedance: S/N: 100 dB(A, 20 kHz LPF)OutputsMD/TAPE (RECVoltage: 250 mVOUT), VIDEO1Impedance: 10 kilohms(AUDIO OUT)SUB WOOFERVoltage: 2 VImpedance: 1 kilohmsToneGain levels:6 dB, 1 dB stepFM 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 US, CNDWith 10-kHz tuning scale: 530 1710 kHz 5)With 9-kHz tuning scale:531 1710 kHz 5)Models of area code E2, MXWith 10-kHz tuning scale: 530 1610 kHz 5)With 9-kHz tuning scale:531 1602 kHz 5)Models of area code AUS, SP, AEP, UK, TWWith 9-kHz tuning scale:531 1602 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 requirementsUS, CND, MX120 V AC, 60 HzAEP, UK230 V AC, 50/60 HzSP220 230 V AC, 50/60 HzE120/220/240 V AC, 50/60 HzTW110 V AC, 50/60 HzAUS240 V AC, 50HzPower consumptionArea codePower consumptionUS, MXSTR-DE485: 180 WCNDSTR-DE485: 260 VAAEP, UKSTR-DE485E: 155 WAUS, SP, ESTR-DE485: 155 WTWSTR-DE485: 400 WPower consumption (during standby mode)0.5 WDimensions430 145 298 mm(16 7/8 5 6/8 11 6/8 in.)including projecting partsand controlsMass (Approx.)7.0 kg (15lb 7 oz)Supplied accessoriesFM wire antenna (1)AM loop antenna (1) STR-DE485E/DE485 onlyRemote commander RM-U306 (1)R6 (size-AA) batteries (2)Design and specifications are subject to changewithout notice. AbbreviationCND: Canadian modelAR: Argentina modelAUS: Australian modelCH: Chinese modelMX: Mexican modelSP: Singapore modelTW: Taiwan modelRadioFans.CN 收音机爱 好者资料库3STR-DE485/DE485EMODEL IDENTIFICATION BACK PANEL Part No.MODELPART No.US4-238-188-0sCanadian4-238-188-1sAustralian4-238-188-2sSingapore4-238-188-3sChinese4-238-188-4sE4-238-188-5sAEP4-238-188-6sUK4-238-188-7sMexican4-238-188-8sArgentina4-238-188-9sTaiwan4-238-189-9s1.5 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 microampers.).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” indica-tion is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-amples of a passive VOM that is suitable. Nearly all batteryoperated digital multimeters that have a 2 V AC range are suit-able. (See Fig. A)SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LESDIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONTCRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PICES SONYDONT LES NUMROS SONT DONNS DANS CE MANUEL OUDANS LES SUPPLMENTS PUBLIS PAR SONY.4TABLE OF CONTENTS1. GENERALMain unit . 5Remote button description. 62. DISASSEMBLY2-1. Case . 72-2. Front Panel Section . 82-3. Back Panel. 82-4. Digital Board. 92-5. Standby Board . 92-6. Main Board .103. TEST MODE. 114. DIAGRAMS4-1. IC Pin Description. 124-2. Circuit Boards Location . 154-3. Block Diagram Tuner/Audio Section . 164-4. Block Diagram Digital Section .174-5. Block Diagram Video/Display Section .184-6. Block Diagram Power Section . 194-7. Printed Wiring Boards Main Section . 214-8. Schematic Diagram Main Section (1/2) . 224-9. Schematic Diagram Main Section (2/2) . 234-10. Printed Wiring Board Digital Section (1/2) . 244-11. Printed Wiring Board Digital Section (2/2) . 254-12. Schematic Diagram Digital Section (1/2) .264-13. Schematic Diagram Digital Section (2/2) .274-14. Printed Wiring Board Video Section .284-15. Schematic Diagram Video Section . 294-16. Printed Wiring Boards Display Section . 304-17. Schematic Diagram Display Section .314-18. Printed Wiring Boards Power Section . 324-19. Schematic Diagram Power Section . 334-20. IC Block Diagrams. 345. EXPLODED VIEWS5-1. Case Section . 355-2. Front Panel Section .365-3. Chassis Section-1 . 375-4. Chassis Section-2 . 386. ELECTRICAL PARTS LIST. 39STR-DE485/DE485E5STR-DE485/DE485ESECTION 1GENERALThis section is extractedfrom instruction manual.List of Button Locations and Reference Pages5GBwdwfwhwjwkwlesedefegehekeje; eawg1784qs0qa52 36qfqgqjqhqkqlw;qdwaws9List of Button Locations and Reference PagesMain unitHow to use this pageUse this page to find the location of buttonsthat are mentioned in the text.FM MODE (Models of area codeCEL, CEK only) ed, (Except formodels of area code CEL, CEK)ef (31)INPUT MODE qg (21)IR (receptor) 4 (38, 45, 51)LEVEL 0 (20, 27, 55)MMASTER VOLUME wd (20, 49)MD/TAPE qj (21)MEMORY eh (30, 32)MENU +/ e; (16, 27, 35, 36)MENU ea (16, 27, 35, 36)MODE wj (24, 50)MULTI CHANNEL DECODING(indicator) (Except forSTR-DE485E) 7 (21)MULTI CH IN (Except forSTR-DE485E) qf (21)MUTING wf (21, 49)N SNAME 8 (35)PHONES (jack) ek (21)PRESET/PTY SELECT +/(Models of area code CEL, CEKonly) 3 (32, 33)PRESET TUNING +/ (Exceptfor models of area code CEL,CEK) 3 (32, 53)PTY (Models of area code CEL,CEK only) ef (33)SET UP 6 (4, 16, 36, 54)SHIFT eg (32)SLEEP (STR-DE485E only)qf(36)SURR qd (27, 54)T ZTREBLE +/ qh (29, 54)TUNER ws (21, 30-32, 35)TUNING +/ 5 (31)VIDEO 1 qk (21)VIDEO 2 w; (21)BUTTON DESCRIPTIONS/1 (power) 1 (4, 15, 20, 29,30, 53)ALPHABETICAL ORDER0 92 CH wh (25)A DA.DEC wk (2325)AM (Except for models of areacode CEL, CEK) es (30, 31)BASS +/ wg (29, 54)CD ql (21)CINEMA STUDIO EX A, B, C9 (23, 24)Digital Cinema Sound (indicator)qs (23)DIMMER ej (22)DISPLAY 2 (22, 33, 51)Display qa (22)DVD/LD wa (21)E LENTER wl (35)FM (Except for models of areacode CEL, CEK) ed (30, 31)FM/AM (Models of area codeCEL, CEK only) es (30, 31)Illustration number rNAME 8 (35) RRName of button/partReference page6STR-DE485/DE485EOperations Using the Remote RM-U30645GBExcept for STR-DE585 area code CAYou can use the remote RM-U306 to operatethe components in your system.Remote buttondescriptionNXmM.1234567809MD/TAPECDTUNERTV/VIDEOVIDEO 2VIDEO 1DVD/LDSYSTEMSTANDBY10SHIFTCH/PRESET-ANTTV/VTRSOUND FIELD+MASTERVOLTEST TONEMAIN MENUMULTI CHENTERD.SKIPA.DEC2CHMODED.TUNINGTOP MENUDVD MENUENTERRETURNfFGgfFGgSLEEPAV?/1?/1MENUTV VOLTV CHMUTINGOxOperations Using the Remote RM-U306continuedThe tables below show the settings of eachbutton.RemoteOperationsFunctionButtonSLEEPReceiverActivates the sleepfunction and the durationwhich the receiver turnsoff automatically.?/1ReceiverTurns the receiver on oroff.46GBRemote button description(continued)RemoteOperationsFunctionButtonVIDEO 1ReceiverTo watch VCR.(VTR mode 3)VIDEO 2ReceiverTo watch VCR.(VTR mode 1)DVD/LDReceiverTo watch DVD or laserdisc.MD/TAPE ReceiverTo listen to Minidisc oraudio tape.CDReceiverTo listen to compact disc.TUNERReceiverTo listen to radioprograms.SHIFTReceiverPress repeatedly to selecta memory page forpresetting radio stationsor tuning to presetstations.D.TUNINGReceiverTuner station direct key-in-mode.A.DECReceiverSelect AUTO DECODEmode.MODEReceiverSelects sound field mode.2CHReceiverSelects 2CH mode.TESTReceiverPress to output test tone.TONEMAINReceiverPress this buttonMENUrepeatedly to select oneof the four cursor modes:SURR, LEVEL, SET UPand NAME.MULTI CHReceiverSelects MULTI CH INsource.MENU ReceiverSelects a menu item.MENU +/ ReceiverMakes adjustment orchange the setting.MUTINGReceiverMutes the sound from thereceiver.7STR-DE485/DE485ENote : This set can be disassemble according to the following sequence.SECTION 2DISASSEMBLY2-1. CASE2-1.CASE(Page 7)2-2.FRONT PANEL SECTION(Page 8)2-3.BACK PANEL(Page 8)SET2-4.DIGITAL BOARD(Page 9)2-5.STANDBY BOARD(Page 9)2-6.MAIN BOARD(Page 10)Note : Follow the disassembly procedure in the numerical order given.1two screws(case 3 TP2)2two screws(case 3 TP2)3two screws(case 3 TP2)4case8STR-DE485/DE485E2-2. FRONT PANEL SECTION2-3. BACK PANEL5front panel section3two screws(BVTP3 x 8)1CNS42CNP7914four screws(BVTP3 x 8)1CNS72CNS83CNP9014CNP1545two screws(BVTP3 x 8)8two screws(BVTP3 x 8)7two screws(BVTP3 x 8)6five screws(BVTP3 x 8)9 screw (BVTP3 x 8)0 screw (BVTP3 x 8)qa screw (BVTP3 x 8)qs screw (BVTP3 x 8)qd back panel (HT4)9STR-DE485/DE485E2-4. DIGITAL BOARD1CNS45CNS16CNS22CNP63CNP58 screw (BVTP3 x 8)9 bracket (digital)7 DIGITAL board4 screw (BVTP3 x 8)5STANDBY board1CNP9152CNP9023CNP9034 three screws (BVTP3 x 8)2-5. STANDBY BOARD10STR-DE485/DE485E7MAIN board1CNP8012CNP8025screw(BVTP3 x 8)3two screws(BVTP3 x 8)4two screws(BVTP3 x 8)6two screws(BVTP3 x 8)2-6. MAIN BOARD11STR-DE485/DE485ESOFTWARE VERSION DISPLAY MODE* The software version is displayed.* Procedure:While depressing the ENTER and the SOUND FIELD A.F.D.buttons simultaneously, press the power ?/1 button to turn onthe main power. The model name, destination and the softwareversion are displayed.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 turnson one after another.* Procedure:While depressing the MD/TAPE and the SHIFT buttons simul-taneously, press the power ?/1 button to turn on the main power.1.All segments turn on.MULTI CHANNEL DECODING, Digital Cinema Sound, SOUNDFIELD A.F.D., MODE, 2CH and SET UP LED turn on.2.Press the VIDEO 1 button, confirm displaySOUND FIELD A.F.D, MODE, SOUND CONTROL LEVEL,SET UP and Digital Cinema Sound LED turn on.3.Press the VIDEO 1 button, confirm displayMULTI CHANNEL DECODING, SOUND FIELD 2CH, SOUNDCONTROL SURR and NAME LED turn on.4.Press the VIDEO 1 button, All segments turn off.5.Every pressing of the VIDEO 1 button turns on each segmentand LED one after another in the same order.(Not only the VIDEO 1 button, but also the other buttons suchas VIDEO 2, DVD/LD, MD/TAPE, CD, TUNER can be used.)SECTION 3TEST MODESWLSLCRSSRSLEEPSP.OFF( ( ( L F E ) ) )DIGITALOPTCOAX MULTI CH INPRO LOGICDTS MPEGSTEREOMONORDSMEMORYMUTINGINFONEWSTAEQD.RANGEDDdBkHzmft.MHzSWLRSSLEEP L F E COAXPRO LOGICMPEGSTEREORDSMUTINGINFOTAD.RANGEDDk m MHzSLCSRSP.OFF( ( ( ) ) )DIGITALOPTMULTI CH INDTSMONOMEMORYNEWSEQdB Hz ft.FACTORY PRESET MODE* All preset contents are reset to the default setting.* Procedure:While depressing the VIDEO 1 and the SOUND FIELD 2CHbuttons simultaneously, press the power ?/1 button to turn onthe main power. The message FACTORY appears and switchoff the set.While depressing the VIDEO 1 and the SOUND FIELD 2CHbuttons simultaneously, press the power ?/1 button again. Themessage FACTORY appears and the preset contents are reset tothe default values.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 SOUND FIELD MODE button, press thepower ?/1 button to turn on the main power. The message S. F.CLR appears and initialization is performed.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 TUNER to AM. Turn off the main power.While depressing the TUNING+ button or thePRESET TUNING button, press the power ?/1 button to turnon the main power. Either the message 9 k STEP or 10 k STEPappears. Select the desired step.* For US/E model