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
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