Sony-STRK740P-rec-sm 维修电路原理图.pdf

STR-K740P/K840PUS ModelCanadian ModelAEP ModelUK ModelE ModelSERVICE MANUALFM STEREO FM-AM RECEIVER Continued on next page SPECIFICATIONSVer 1.2 2003. 09Dolby Laboratories Licensing Corporation.“DOLBY” the double-D symbol ; “AC-3” and “PRO LOGIC”are trademarks of Dolby Laboratories Licensing Corporation.Photo : STR-K840P (SILVER model)Sony CorporationHome Audio CompanyPublished by Sony Engineering Corporation9-873-544-032003I16-1 2003.09POWER OUTPUT AND TOTALHARMONIC DISTORTION:With 8 ohm loads, both channels driven, from40 20,000 Hz; rated 100 watts (STR-K840Ponly)/80 watts (STR-K740P only) per channelminimum RMS power, with no more than0.09 % 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 0.09 %)STR-K840P:100 W + 100 WSTR-K740P:80 W + 80 WReference Power Output(8 ohms 1 kHz, THD 0.7 %)STR-K840P:FRONT1):100 W/chCENTER1): 100 WSURR1): 100 W/chSTR-K740P:FRONT1): 80 W/chCENTER1): 80 WSURR1): 80 W/chModels of area code CEL,CEKRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-K840P:100 W + 100 W2)STR-K740P:80 W + 80 W2)Reference Power Output2)(8 ohms 1 kHz, THD 0.7 %)STR-K840P:FRONT1): 100 W/chCENTER1): 100 WSURR1): 100 W/chSTR-K740P:FRONT1): 80 W/chCENTER1): 80 WSURR1): 80 W/chModels of area code AR, SPRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-K840P:90 W + 90 WReference Power Output2)(8 ohms 1 kHz, THD 10 %)STR-K840P:FRONT1): 120 W/chCENTER1): 120 WSURR1): 120 W/chModels of other area codeRated Power Output at Stereo Mode(8 ohms 1 kHz, THD 0.7 %)STR-K840P:100 W + 100 W2)STR-K740P:80 W + 80 W2)Reference Power Output2)(8 ohms 1 kHz, THD 10 %)STR-K840P:FRONT1): 120 W/chCENTER1): 120 WSURR1): 120 W/chSTR-K740P:FRONT1): 100 W/chCENTER1): 100 WSURR1): 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 requirementsE240 V AC, 50 HzSP, CEL, CEK, AR230 V AC, 50 HzMX120 VAC, 60 Hz STR-K740P/K840P are the tuner and theamplifier section in HT-DDW740/DDW840.RadioFans.CN 收音机爱 好者资料库2STR-K740P/K840PInputs (Digital)DVD/LD (Coaxial)VIDEO 2 (Optical)OutputsMD/TAPE (OUT),VIDEO 1(AUDIO OUT)SUB WOOFERToneGain 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 U, CAWith 10-kHz tuning scale: 530 1710 kHz6)With 9-kHz tuning scale:531 1710 kHz6)Models of area code E, AR, MXWith 10-kHz tuning scale: 530 1610 kHz6)With 9-kHz tuning scale:531 1602 kHz6)Models of area code MY, SP, CEL, CEKWith 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 dB6) 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 . 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 ohmsSensitivity: Impedance: 75 ohmsS/N: 100 dB(A, 20 kHz LPF)Sensitivity: Impedance: S/N: 100 dB(A, 20 kHz LPF)Voltage: 250 mVImpedance: 10 kilohmsVoltage: 2 VImpedance: 1 kilohmsGeneralPower requirementsArea codePower requirementsU, CA, MX120 V AC, 60 HzCEL, CEK230 V AC, 50/60 HzMY, SP, AR220 230 V AC, 50/60 HzE120/220/240 V AC, 50/60 HzPower consumptionArea codePower consumptionU, MXSTR-K840P: 210 WSTR-K740P: 180 WCASTR-K840P: 300 VASTR-K740P: 260 VACEL, CEK, MY, SP,STR-K840P: 180 WE, ARSTR-K740P: 155 WPower consumption (during standby mode)0.5 WDimensions430 ? 145 ? 298 mm(16 7/8 ? 5 6/8 ? 11 6/8inches) includingprojecting parts andcontrolsMass (Approx.)7.0 kg (15 lb 7 oz)Design and specifications are subject to changewithout notice.Frequency responseMULTI CH IN3), CD,MD/TAPE, DVD/LD,VIDEO 1, 2Inputs (Analog)MULTI CH IN3), CD,MD/TAPE, DVD/LD,VIDEO 1, 23) HT-DDW840 only4) INPUT SHORT (with sound field and tonebypassed).5) Weighted network, input level.10 Hz 50 kHz+0.5/2 dB (with soundfield, and tone bypassed)Sensitivity: 250 mVImpedance: 50 kilohmsS/N4): 96 dB(A, 250 mV5)AbbreviationU: US model.CA: Canadian model.CEL: AEP model.CEK: UK model.SP: Singapore model. (Malaysia model included.)MX: Mexican model.MY: Malaysia model.AR: Argentine model.RadioFans.CN 收音机爱 好者资料库3STR-K740P/K840PSAFETY-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-K740P/K840PTABLE OF CONTENTS1. GENERAL 52. TEST MODE 63. DIAGRAMS 83-1. Circuit Board Location 83-2. Block Diagrams MAIN Section 10 DISPLAY/POWER Section 113-3. Printed Wiring Board DIGITAL Section 123-4. Schematic Diagram DIGITAL Section (1/2) 133-5. Schematic Diagram DIGITAL Section (2/2) 143-6. Printed Wiring Board MAIN Section 153-7. Schematic Diagram MAIN Section (1/2) 163-8. Schematic Diagram MAIN Section (2/2) 173-9. Printed Wiring Board DISPLAY Section 183-10.Schematic Diagram DISPLAY Section 193-11.Printed Wiring Board VIDEO Section 203-12.Schematic Diagram VIDEO Section 203-13.Printed Wiring Board POWER Section 213-14.Schematic Diagram POWER Section 223-15.IC Block Diagrams 233-16.IC PIN FUNCTION DESCRIPTIONS 254. EXPLODED VIEWS 274-1. Front Panel Section 274-2. Chassis Section-1 284-3. Chassis Section-2 295. ELECTRICAL PARTS LIST 30MODEL IDENTIFICATION BACK PANEL Parts No.MODELPARTS No.K740P : US4-238-189-2sK740P : Canadian4-238-189-3sK740P : Malaysia,Singapore4-238-189-4sK740P : E4-238-189-5sK740P : AEP4-238-189-6sK740P : UK4-238-189-7sK840P : US4-238-193-0sK840P : Canadian4-238-193-1sK840P : Malaysia, Singapore4-238-193-2sK840P : E4-238-193-3sK840P : AEP4-238-193-4sK840P : UK4-238-193-5sK840P : Argentine4-238-193-8sK840P : Mexican4-238-193-9s5STR-K740P/K840PSECTION 1GENERALThis section is extractedfrom instruction manual.g+17452 3690qaqsqdqfqg qhqjqkqlw; waws8FM MODE (Models of area codeCEL, CEK only) ed, (Except formodels of area code CEL, CEK)ef (32)INPUT MODE qg (22)IR (receptor) 4 (39, 46, 52)LEVEL 0 (16, 20, 28, 57)MMASTER VOLUME wd (20, 50)MD/TAPE qj (22)MEMORY eh (31, 33)MENU +/ e; (16, 28, 36, 37, 57)MENU ea (16, 28, 36, 37, 57)MODE wj (25, 30, 51)MULTI CHANNEL DECODING(indicator) (HT-DDW840 only)7 (22)MULTI CH IN (HT-DDW840only) qf (22)MUTING wf8 (22, 50)N SNAME (36)PHONES (jack) ek (22, 51)PRESET/PTY SELECT +/(Models of area code CEL, CEKonly) 3 (33, 34)PRESET TUNING +/ (Exceptfor models of area code CEL,CEK) 3 (33, 54)PTY (models of area code CEL,CEK only) ef (34)SET UP 6 (4, 16, 37, 57)SHIFT eg (33)SLEEP (HT-DDW740 only) qf(37)SURR qd (28, 57)T ZTREBLE +/ qh (30, 57)TUNER ws (22, 32, 33, 36)TUNING +/ 5 (32)VIDEO 1 qk (22)VIDEO 2 w; (22)BUTTON DESCRIPTIONS?/1 (power) 1 (4, 15, 20, 21,30, 31, 54)ALPHABETICAL ORDER0 92 CH wh (26)A DA.DEC wk (24, 26)AM (Except for models of areacode CEL, CEK) es (31, 32)BASS +/ wg (19, 30, 57)CD ql (22)CINEMA STUDIO EX A, B, C9 (25)Digital Cinema Sound (indicator)qs (24)DIMMER ej (23)DISPLAY 2 (23, 34, 52)Display qa (23)DVD/LD wa (22)E LENTER wl (36)FM (Except for models of areacode CEL, CEK) ed (31, 32)FM/AM (Models of area codeCEL, CEK only) es (31, 32)ekejeh eg ef ed es eae; wl wk wj whwgwfwdAbbreviationCEK: UK model.CEL: AEP model.6STR-K740P/K840PSECTION 2TEST MODEFACTORY PRESET MODE* All preset contents are reset to the default setting.* Procedure:While depressing the VIDEO 1 and the 2CH buttons simul-taneously, press the power ?/1 button to turn on the main power.The message “FACTORY” appears and switch off the set.While depressing the VIDEO 1 and the 2CH buttons simul-taneously, press the power ?/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+ button, press the power ?/1 button to turn on themain 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 LEVEL button, press the power ?/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 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 ,A.F.D. , MODE , 2CH and SET UP LED turn on.2.Press the VIDEO button, confirm display.A.F.D. , MODE , LEVEL , SET UP , and Digital Cinema SoundLED turn on.3.Press the VIDEO button, confirm displayMULTI CHANNEL DECODING , 2CH , SURR and NAMELED turn on.4.Press the VIDEO button, All segments turn off.5.Every pressing of the VIDEO button turns on eachsegment and LED one after another in the same order.(Not only the VIDEO button, but also the other buttons such asDVD/LD , TV/SAT , MD/TAPE , CD , TUNER and AUX 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 MODE button, press the power ?/1 buttonto turn on the main power.The message “SURR. CLR.” appears and initialization isperformed.DEMONSTRATION MODE* Demonstration is performed.* Procedure :While depressing the SET UP button, press the power ?/1button. The message appears and demonstration is performed.* To finish DEMONSTRATION MODE, press the power ?/1button while the introduction message appears in the display.SOFTWARE VERSION DISPLAY MODE* The software version is displayed.* Procedure:While depressing the ENTER and the A.F.D buttonssimultaneously, press the power ?/1 button to turn on the mainpower. The model name, destination and the software version aredisplayed.KEY CHECK MODE* Button check* Procedure:While depressing the VIDEO 1 and the SHIFT buttonssimultaneously, press the power ?/1 button to turn on the mainpower.“REST 39” appears. (AEP, UK, model: “RESET 38”)Every pressing of any button other than ?/1 and SPEAKERScounts down the buttons. The buttons which are already countedonce are not counted again. When all buttons are pressed “REST00” appears.When MASTER VOLUME is rotated in clockwise direction,“VOL MIN”, “VOL 1” to “VOL 48”, “VOL MAX” appear.SWLSLCRSSRSLEEPSP.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.7STR-K740P/K840PAUTO BETICAL 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 “AUTO-BETICAL SELECT” appears and thereceiver starts scanning.8STR-K740P/K840PSECTION 3DIAGRAMS3-1. Circuit Board LocationVIDEO board DIGITAL board MAIN boardDISPLAY boardHEADPHONE boardPOWER SW boardSTANDBY boardAC SELCT board (E model only)99STR-K740P/K84