Yamaha-NXSW77-hts-sm 维修电路原理图.pdf

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1、SERVICE MANUALHOME THEATER SYSTEM100775P.O.Box 1, Hamamatsu, JapanI CONTENTSTO SERVICE PERSONNEL . 1FRONT/REAR PANEL . 12SPECIFICATIONS. 34INTERNAL VIEW (AV-S77C) . 4DISASSEMBLY PROCEDURES . 56P.C.B. OPERATION CHECK. 6TEST PROGRAM MODE . 79DSP DIAG MODE (Self-diagnosis) . 916IC DATA . 1723DISPLAY DA

2、TA . 24BLOCK DIAGRAM. 2529PRINTED CIRCUIT BOARD . 3041SCHEMATIC DIAGRAM . 4246PARTS LIST. 4759REMOTE CONTROL TRANSMITTER . 60AV-S77AV-S77IMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedu

3、res inherent to the industry, and more specifically YAMAHA Products, are already known and understood by the users,and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expens

4、ivecomponents, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service requiredshould be performed by an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any ind

5、ividual or firm does not constitute authorization, certification or recognition of any applicabletechnical capabilities, or establish a principle-agent relationship of any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineerin

6、g, and service departments of YAMAHA arecontinually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation toretrofit. Should any discrepancy appear to exist, please contact the distributors Service Division

7、.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to theground buss in the unit (heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck

8、 all work before you apply power to the unit.The AV-S77 is composed of the AV-S77C, the NX-SW77 and the NX-S77E.FRONT SPEAKER (AV-S77C)SUBWOOFER(NX-SW77)REAR SPEAKER(NX-S77E)REAR SPEAKER(NX-S77E) RadioFans.CN 收音机爱 好者资料库AV-S77AV-S771WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATING

9、TABLEWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency(and possibly other entit

10、ies) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-SON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or exposeeyes t

11、o solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands beforehandling food.I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked sand must be replaced with parts having

12、specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedb

13、y 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.I FRONT/REAR PANELM AV-S77CRadioFans.CN 收音机爱 好者资料库AV-S77AV-S772M REMOTE CONTROLTRANSMITTER M NX-S77EM NX-SW77AV-S77AV-S773I SPECIFICATIONSAMPLIFIER SECTIONMaximum Output PowerFront (1kHz,

14、10 % THD, 6) .25W + 25WRear (1kHz, 10 % THD, 6) .25W + 25WSubwoofer (100Hz, 10 % THD, 5) . 50WSignal to Noise Ratio (IHF-A, AUX) . 95dBTotal Harmonic Distortion (AUX, 1kHz, 12.5W/6) .0.05%Input Sensitivity / Impedance (AUX) . 200mV / 50kFRONT SPEAKER SECTION (AV-S77C)Type. Bass ReflexDriver . 8cm Co

15、ne x 2, Magnetic Shielding TypeNominal Input Power. 30WImpedance . 6Frequency Response .120Hz 20kHzREAR SPEAKER SECTION (NX-S77E)Type.Acoustic SuspensionDriver .8cm Cone, Magnetic Shielding TypeNominal Input Power. 30WImpedance . 6Frequency Response .140Hz 20kHzSUBWOOFER SECTION (NX-SW77)Type. Advan

16、ced YAMAHA Active Servo TechnologyDriver .16cm Cone, Magnetic Shielding TypeFrequency Response .30Hz 200HzGENERALPower SupplyB, G models .AC 230V 50HzPower Consumption . 120WStandby Power Consumption . about 1WMax. Dimensions (W x H x D)AV-S77C .600 x 110 x 220 mm(23-5/8 x 4-5/16 x 8-11/16)NX-SW77 .

17、176 x 405 x 433 mm(6-15/16 x 16 x 17-1/16)NX-S77E .100 x 140 x 112 mm(3-15/16 x 5-1/2 x 4-3/8)WeightAV-S77C .5.0kg (11 lbs.)NX-SW77 . 11.0kg (24 lbs. 4 oz.)NX-S77E . 0.8kg (1 lbs. 12 oz.)AccessoriesRemote Controller, Batteries (R6P) x 2, Audio Connection Cord (2pin, 3 m) x 1, System Connector Cable

18、(8 pin, 3m) x 1, SystemConnector Cable (13 pin, 3m) x 1, Speaker Cords (Rear: 15m,Front: 3m) x 1, Velcro Strips x 2 sets, Speaker Mounting brackets(Type A) x 2, Speaker Mounting brackets (Type B) x 2, Screw x 2,Wing Nuts x 2, Connection Guide* Specifications are subject to change without notice due

19、to productimprovements.B . British modelG . European modelManufactured under license from Dolby Laboratories.“Dolby”, “Pro Logic” and the double-D symbol are trademarks ofDolby Laboratories.“DTS” and“ DTS Digital Surround” are registered trademarks ofDigital Theater Systems, Inc.M AV-S77C Dimensions

20、20(13/16)600 (23-5/8)220 (8-11/16)200 (7-7/8)100(3-15/16)110(4-5/16)Unit: mm (inch)10(3/8)AV-S77AV-S774M NX-S77E DimensionsM NX-SW77 Dimensions100 (3-15/16)140 (5-1/2)112 (4-3/8)Unit: mm (inch)70 (2-3/4)Unit: mm (inch)435 (17-1/8)433 (17-1/16)176 (6-15/16)400 (15-3/4)405 (16)5(3/16)I INTERNAL VIEW (

21、AV-S77C)1 MAIN P.C.B.2 DSP P.C.B.3 OPERATION P.C.B.123AV-S77AV-S7744444DSP UnitCB2CN304CN305CB31BottomOPERATION P.C.B.2211111Grill Assy333Amplifier Unit5I DISASSEMBLY PROCEDURES(Remove parts in the order as numbered.)Disconnect the power cord from the AC outlet.AV-S77C Disassembly procedures1. Remov

22、al of Grille Assya. Insert a flat tip screwdriver or the like from the bottom ofthe Grille Assembly.b. Push up the Grille Assembly with the screwdrivergradually until it can be removed from the main unit.(Fig. 1).*The Grille Assembly is fixed securely at 8 dowels.When removing it, use care not to ca

23、use a scratchor any damage to the main unit. When reinstallingit, apply quick-drying type bond to the dowels ofthe Grille Assembly and fit it in place securely. (If itis only pushed in, it will come off easily.)c. Remove 8 screws (1). The OPERTION P.C.B. canthen be removed from the Grille Assembly.

24、(Fig. 1)2. Removal of Amplifier Unita. Remove 6 screws (2). (fig. 1)b. Remove 7 screws (3) and take out the Amplifier Unitand OPERATION P.C.B. in the arrow direction. (Fig. 2)c. Remove the connectors CN304 and CN305. (Fig. 3)3. Removal of DSP Unita. Remove the connectors CB2 and CB3. (Fig. 3)b. Remo

25、ve 8 screws (4). The DSP Unit can then beremoved. (Fig. 3)Fig. 1Fig. 2Fig. 3AV-S77AV-S775555Amplifier UnitTGrille Assy6NX-SW77 Disassembly procedures1. Removal of Grille Assya. Push up the Grille Assembly with a flat tip screwdriveror the like inserted from the bottom. (Fig. 4).b. Keep pushing up th

26、e Grille Assembly gradually until itcan be removed.*The Grille Assembly is fixed securely at 6 dowels.When removing it, use care not to cause a scratchor any damage to the main unit. When reinstallingit, apply quick-drying type bond to the dowels ofthe Grille Assembly and fit it in place securely. (

27、If itis only pushed in, it will come off easily.)2. Removal of Amplifier UnitRemove 12 screws (5) and then remove the AmplifierUnit. (Fig. 5)I P.C.B. OPERATION CHECKa. Remove the Amplifier Unit, referring to Disassemblyprocedures described above.b. Remove each P.C.B as required.c. Connect all the co

28、nnectors between P.C.B.s asconnected originally.d. Using 2 DIN cables, connect the AV-S77C and the NX-SW77.e. Connect the power cord of the NX-SW77 to the ACpower outlet and turn on the power.DIN Cable (Black)AV-S77CNX-SW77DIN Cable (White)Fig. 4Fig. 5AV-S77AV-S777I TEST PROGRAM MODE1. Procedure for

29、 starting Test ProgramWith the power plug disconnected from the outlet, reconnect it to the outlet while pressing the VOLUME key and the DSPkey simultaneously, and the Test Program will be activated.When the Test Program is activated, “01 DEST-Ex” is displayed.2. Procedure for selecting and executin

30、g Test ProgramUsing the VOLUME + (UP) key and the Volume - (DOWN) key, select the Test Program and then press the INPUT keyto execute it.3. Procedure for canceling Test ProgramThere are two methods for cancellation.a. Turn off the power by pressing the POWER key of the main unit or the remote contro

31、ller.b. Select the Test Program “01 DEST-Ex” and press the INPUT key for execution. (The normal mode will be restored.)4. Details of the Test Program functionDisplay01 DEST-B,G1FunctionDestination display/ test program endDestination displayJ:Ja.J (Japanese)B,G1.B, G models03 FL+CLEARFL display segm

32、ents all light up / BACKUP RAM CLEAR1st time: FL display segments all light up and standby LED lights up.2nd time: RAM CLEAR is executed (RAM CLEAR OK on display)* State before shipped out of the factory preset.04 FL CHECKFL display light-up check1st time: FL display segments all light up and standb

33、y LED lights up.2nd time: Even number segments and digits light up.3rd time: Odd number segments and digits light up.1st time2nd time3rd time02 Fact.TestFactory test modeThis test mode is used for factory inspection before shipping and is not usuallyused.If the test program has been executed, it is

34、not possible to shift to another testprogram.In such case, cancel the test program.AV-S77AV-S778Display05 DSP DiagFunctionThe DSP DIAG (self-diagnosis) mode is activated. (Refer to next page for the details.)06 Ver-1.02Microprocessor version / date displayExample of microprocessor display05 Ver-1.02

35、Example of microprocessor date display05 01.06.07What is displayed varies depending on the microprocessor software.07 SUM39baCheck sum calculation display / re-calculation09 PrCan-OFFAll protection cancellation function ON/OFF *110 Pr! PSProtection operation history display / clearP: Power circuit v

36、oltageS: NX-SW77 side: Normalx: Abnormal11 RemoCorrRROM collection (EEPROM) remote control data reception / data writeThis test mode is not usually used.12 COR-ClearROM collection (EEPROM) data clear / clear startDisplay is provided only when there is data in the ROM collection area of EEPROM1st tim

37、e: Data clear confirmation (Clear-ON? displayed)2nd time: Data clear execution (Clear:OK! displayed)After “Clear-ON?Clear-ON?Clear-ON?Clear-ON?Clear-ON?” is displayed, do not use INPUT key for execution(because the program contents will be erased).Using VOLUME + (UP) key and VOLUME - (DOWN) key, sel

38、ect another testprogram.*The IC for ROM collection has a role to help the microprocessor be upgraded. Ifthe written data is cleared, the old version will be restored.08 ROM CheckDont use this mode (item). (Its correct operation is not available.)*1CAUTION:Using this product with the protection funct

39、ion cancelled may cause damage to itself. Use special care for this point whenusing this mode.AV-S77AV-S779Display13 Cors- St.FunctionROM collection (EEPROM) check sum calculation/calculation startThis message is displayed only when data exists in the ROM correction area ofEEPROM.Example of display1

40、3 Cors-288b*The ROM collection (EEPROM) is utilized to cope with the data area for backupand microprocessor bugs partially. The backup memory for the sound field or thelike will be retained semi-permanently even when the plug is disconnected. Nodata is written in the parts mounted on the product as

41、single units.I DSP DIAG MODE (Self-diagnosis)1. Procedure for starting DSP DIAGReferring to TEST PROGRAM MODE in the previous section, select/execute “05 DSP Diag”.When “05 DSP Diag” is executed, the current input name is displayed followed by “Push DSP Key”. (The DSPindicator keeps blinking.)When t

42、he DSP key is pressed next, Analog Thr. of the main menu is displayed followed by A.T.M. Bypass ofthe sub-menu.2. Procedure for selecting Main menu and Sub-menuTo change the main menu item, keep pressing the DSP key and to change the sub-menu item, press the DSP keyintermittently.No.Main menu(Displa

43、y)1Analog throughAnalog Thr.2DSP throughDsp Through3AC-3/dts throughAC-3/dts Thr.4Pro logicPro Logic5Speakers setSpeakers Set6Effect offEffect Off7Manual testManual TestSub-menu(Display)MAIN BYPASSA.T.M.BypassDSP 0dBA.T. DSP 0dBYSS908-SRAMDspT.908SRAMYS908DspT.YSS908DSP FULL BITDspT.FullBit*1 Analo2

44、/0CENTER LARGEProL.CenterLEFFECT OFFProL.Eff.OffMAIN : SMALL 0dBSp.MainS 0dBMAIN : LARGE 0dBSp.MainL 0dBLFE/BASS : MAINCENTER : NONESp.Lfe:M C:NLFE/BASS : MAINSp.LfeBass:MLFE/BASS : SWFRSp.Lfe:SwfrCENTER : NONESp.Cent:NoneCENTER : SMALLREAR : SMALLSp.Ce:S Re:SEFFECT OFFEffect OffALLM.Test AllMAIN LM

45、.Test LeftCENTERM.TestCenterMAIN RM.Test RightREAR RM.Test RearRREAR LM.Test RearLLFEM.Test LfeAV-S77AV-S77103. Procedure for canceling DIAGTurn off the power by pressing the POWER key of the main unit or the remote controller.*1FL display of AC-3/dts ThroughA combination of the sampling frequency a

46、nd the number of channels is displayed.Example: AC-332k2/0AC3/dtsSampling frequencyNumber of channels (Front/Rear)AC3Analog Analo1+1 1+1dts32kHz 32k1/0 1/044.1kHz 44.1k2/0 2/048kHz 48k3/0 3/02/1 2/13/1 3/12/2 2/23/2 5.1ch 3/27.1 (DTS) 7.1AV-S77AV-S7711DIR2CODEC.DACS4227YM3436CODEC.ADAC3D2av(YSS918)C

47、S4227DECODER256K SRAMDSPANALOG INL/RL/RL/RL/RDIGITAL INREAR LREAR RCENTERSUB WOOFERMAIN RMAIN LDIR2CODEC.DACS4227YM3436CODEC.ADAC3Dav(YSS918)CS4227DECODER256K SRAMDSPANALOG INL/RL/RREAR LREAR RCENTERSUB WOOFERL/RL/RDIGITAL INMAIN RMAIN LDetails of DIAG menu1. Analog ThroughThe input is fixed to use

48、the analog (A/D) and has 2 sub-menu items.DSP 0dBThe main L/R, C/SW, RL/RR signals pass through the DSP section.MAIN BYPSSThe main L/R signal is output through the analog bypass without passing the DSPsection.The main L/R signal passing through the DSP is output through C/SW and RL/RR. The shaded sq

49、uare means that the element included in it does not operate.AUX IN: 20dBV, Both chVOLUME:MAXCN301 (Page 31, G3)MAIN L (1kHz): 20dBVMAIN R (1kHz): 20dBVSUBWOOFER (30Hz) : 34dBVREAR L (1kHz): 26dBVREAR R (1kHz): 26dBVCENTER (1kHz): 45dBVAUX IN: 20dBV, Both chVOLUME:MAXCN301 (Page 31, G3)MAIN L (1kHz):

50、 20dBVMAIN R (1kHz): 20dBVSUBWOOFER (30Hz) : 34dBVREAR L (1kHz): 26dBVREAR R (1kHz): 26dBVCENTER (1kHz): 45dBV The shaded square means that the element included in it does not operate.AV-S77AV-S7712DIR2CODEC.DACS4227YM3436CODEC.ADAC3D2av(YSS918)CS4227DECODER256K SRAMDSPANALOG INL/RL/RL/RL/RDIGITAL I