Yamaha-YSTMS50-spk-sm(1) 维修电路原理图.pdf

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1、100675POWERED MULTIMEDIA SPEAKERSYST-MS50/YST-MS55DTO SERVICE PERSONNEL . 1FRONT AND REAR PANELS. 12SPECIFICATIONS. 34INTERNAL VIEW . 4DISASSEMBLY PROCEDURES . 5USB PORT OPERATION CHECK. 617ICONTENTSBLOCK DIAGRAM. 1819PRINTED CIRCUIT BOARD . 2022IC DATA . 23SCHEMATIC DIAGRAM . 2425PARTS LIST . 2637S

2、ERVICE MANUALIMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHAProducts, are already known and understood by the users, and have

3、therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this productmay result in personal injury, destruction of expensive components, and failure of theproduct to perform as specified. For these reasons, we advise all YAMAHA productowners that

4、 any service required should be performed by an authorized YAMAHARetailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual of firm does not constituteauthorization, certification or recognition of any applicable technical capabilities,or est

5、ablish 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,engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products.Modifications are, therefore, inevitabl

6、e and specifications are subject to change without notice or obligationto retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricityyour body may have accumulated by g

7、rounding yourself to the ground buss in the unit(heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work beforeyou apply power to the unit.RadioFans.CN 收音机爱 好者资料库1YST-MS50/YST-MS55DYST-MS50 YST-MS55DI TO SERVICE PERSONNEL1.

8、Critical Components information.Components having special characteristics are marked andmust be replaced with parts having specifications equal tothose originally installed.2. Leakage Current Measurement (For 120V Model only).When service has been completed, it is imperative that youverify that all

9、exposed conductive surfaces are properly insu-lated from supply circuits.GMeter impedance should be equivalent to 1500 ohm shunted by0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in both polarities.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the p

10、roduction of this product contains LEAD. In addition, other electrical/electronic and/or plastic (whereapplicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possiblyother entities) to cause cancer and/or birth defects or other reproductive

11、 harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASONWHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyesto solder/flux vapor!If you come in contact with solder or compone

12、nts located inside the enclosure of this product, wash your hands before handlingfood.WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLEI FRONT AND REAR PANELSCAUTIONF1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ONLY WITH SAME TYPE 1.25A, 250V FUSE.CAUTIONF1: REPLA

13、CE WITH SAME TYPE 1.25A, 250V FUSE.ATTENTIONF1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 1.25A, 250V FUSE.A VSatellite Speakers Front PanelSatellite Speakers Rear PanelYST-MS55DLchRchLchRchRadioFans.CN 收音机爱 好者资料库2YST-MS50/YST-MS55DYST-MS50 YST-MS55DSubwoofer Front PanelSubwoofer Rear PanelYST

14、-MS55DYST-MS55DYST-MS55DYST-MS55DR model onlyU and C modelsU and C models only R modelA modelB and G models3YST-MS50/YST-MS55DYST-MS50 YST-MS55DOperating SectionSatellite(Auto Power)SwitchMaster Volume controlSubwooferVolume controlDimensions (W x H x D)Satellite97x159x178mm(3-13/16x6-1/4x7-9/16)Sub

15、woofer350 x210 x321mm(13-25/32x8-1/4x12/5/8)WeightSatellite0.7kg (1Ibls. 9 oz.)x2Subwoofer8kg (17Ibls. 10oz.)FinishYST-MS50YST-MS50WComputer white colorYST-MS50BBlack colorYST-MS55DYST-MS55DWComputer white colorYST-MS55DBBlack colorAccessoriesYST-MS503.5mm stereo mini plug cable with black color(1.8

16、m) x1RCA pin plug cable (1.8m) x18 pin plug cable (1.8m) x18 pcs of nonskid pads x1setYST-MS55D3.5mm stereo mini plug cable with black color(1.8m) x1RCA pin plug color (1.8m) x1USB cable (2m) x18 pcs of nonskid pads x1setCD-ROM x1USB Operating Requirements YST-MS55D:Windows 98-installed PC equipped

17、with USB port.:CD-ROM drive for device driver installation.:Intel Pentium processor at least 200 MHz or equivalent.:At least 10 MB of available hard disk capacity.* Specifications subject to change without votice.U . U. S. A. modelA .Australian modelC . Canadian modelB .British modelR . General mode

18、lG .European modelTypeActive Servo Technology (Advanced Y. S. T)Output PowerSatellite20W+20W (1kHz, 4 ohms at T.H.D.=10%)Subwoofer40W (100Hz, 5 ohms at T.H.D.=10%)Input Sencitivity200mV (1kHz, 4 ohms at 20W)Input Impedance25 kohmsFrequency Responce32 Hz to 20 kHzCrossover FrequencySatellite Tweeter1

19、2 kHzSubwooferfc=200HzHeadphone Output Level0.38V/30 ohms (at 200 mV Rated Input)Speaker UnitSatelliteTweeter: 19mm (3/4) balanced dome (JA0262),Magnetic shielding TypeMidrange: 8cm(3) cone (JA0865),Magnetic Shielding TypeSubwoofer: 16cm(6-1/2) cone (JA1673),Magnetic Shielding TypeInput SctionYST-MS

20、50Satellite3.5mm stereo minijack for audio-signal x2YST-MS55DSatellite3.5mm stareo mini jack for audio-signal x2(USB in use x1)SubwooferUSB digital x1Output SctionYST-MS50SubwooferRCA pin jack connected to L ch speaker8 pin jack connected to R ch speakerYST-MS55DSubwooferRCA pin jack connected to L

21、ch speaker8 pin jack connected to R ch speaker3.5mm stereo mini jack for audio-signal x1(USB in use)Power Consumption65WPower SupplyU, C modelsAC120V/60HzR modelsAC110/120/220/240V/50/60HzA modelsAC240V/50HzB, G modelsAC230V/50HzWindows 98, are trademarks of Micro Soft Corporation.4YST-MS50/YST-MS55

22、DYST-MS50 YST-MS55DDIMENSIONSM Satellite SpeakerM Subwoofer97 (3-13/16)178 (7-9/16)166(6-17/32)159 (6-1/4)210 (8-1/4)321 (12-5/8)350 (13-25/32)I INTERNAL VIEWSatellite SpeakersNotes:The Satellite Speakers are available by the speaker unit (Lch or Rch).Individual parts of the Satellite Speakers are n

23、ot available. (See page 31 and 33 of the PARTS LIST for YST-MS50,page 34 and 36 of the PARTS LIST for YST-MS55D.)213M L chM R chSatellite Speaker (L ch)1P. C. B. MAIN (8)Satellite Speaker (R ch)2P. C. B. MAIN (4)3P. C. B. MAIN (5)Subwoofer4890 AB5667YST-MS50YST-MS55DSubwoofer4P. C. B. MAIN (6)5P. C.

24、 B. MAIN (1)6P. C. B. MAIN (3)7P. C. B. MAIN (9)(YST-MS55D only)8SPEAKER UNIT(Subwoofer)9POWER TRANSFORMER0P. C. B. MAIN (7)AVOLTAGE SELECTOR (R only)BP. C. B. MAIN (2)Units : mm (inch)5YST-MS50/YST-MS55DYST-MS50 YST-MS55DI DISASSENBLY PROCEDURES(Remove parts in disassenbly order as numbered.)Disass

25、emble of the Subwoofer1. Removal of the Rear Panel Assy.a. Remove 8 screws ( 1 ) in Fig. 1, and remove the rearpanel assy.b. Disconnect one connector in Fig. 1.c. Disconnect the Speaker cord in Fig. 1.2. Removal of the Front Panel AssyThe front panel assy is fixed to the cabinet with dowels at 6loca

26、tions.*As a screwdriver (for slotted head screw) is used forremoval, use special care not to cause damage to theCabinet.a. Using the screwdriver insert in the gaps between the frontpanel assy and cabinet, push up the front panel assy.b. Remove the front panel assy while taking it out.(Front panel as

27、sy can not to remove completely.)3. Removal of the Speakera. Set up the front panel assy in the direction of the arrow,in Fig. 2.b. Remove 4 screws ( 2 ) in Fig. 2, and remove thespeaker.Fig. 2Fig. 1DowelsFront Panel AssyCabinetConnectorGapsSpeaker CordRear Panel AssySpeakerFront Panel Assy12YST-MS5

28、5DI USB PORT OPERATION CHECKThe YST-MS55D have a USB port. This USB port operation is checked be necessary whether or not normal state.1. BEFORE CHECKING THE USB PORT OPERATION(1) Measuring Instruments Personal Computer (Windows 98) CD-ROM (Accessories) USB Cable (Accessories)(2) USB Operating requi

29、rements Windows 98 installed Personal Computer equipped with USB port. CD-ROM drive for device driver installation. Intel Pentium processor at least 200MHz or equivqlent. At least 10MB of abailable hard disk capacity.(3) Installing the YST-MS55D speaker device driversPlease follow these steps to ins

30、tall the Yamaha YST-MS55D speaker device drivers in your Windows 98 system using the included CD-ROM, and verify that Windows 98 recognizes the installed device drivers and that CD audio, sound generated while using software, and system sounds from the personal computer will be output via the USB po

31、rt.1) Start up Windows 98 on your computer. Insert the included YST-MS55D device driver CD-ROM into the CD-ROM drive2) Connect the YST-MS55D speakers using the specified cables and plug them in to the AC outlet. At this time, do not connect the subwoofer to the personal computer yet.3) Make sure tha

32、t the POWER switch on the rear panel of the subwoofer is turned on.4) Connect the subwoofer to the USB port on the personal computer using the USB cable.Notes: Before starting, check the above-mentioned “(2) USB Operating requirements” section to see if your PC supports YST-MS55D. Also, make sure th

33、at no other CD-ROM is loaded in the CD-ROM drive and that you quit all application programs.Have your Windows 98 CD-ROM ready when you install the Yamaha YST-MS55D speaker device drivers. You may need it in some cases.The installation procedure may differ from the following instructions depending on

34、 the system environment. Follow the instructions that appear in the dialog box. 6YST-MS50/YST-MS55D Message “Windows has found a new hardware and is locating the software for it.” appears, then:The following “Add New Hardware Wizard” appears to install the USB Composite Device. (See Fig. 1) 1. Click

35、 Next. The system displays the following panel: (See Fig. 2)The system displays the following panel: (See Fig. 3) 2. Click Next again to display the following panel. 3. Check “CD-ROM drive” and de-select other options, then click Next to proceed to the fol-lowing panel: Fig. 1Fig. 2Fig. 37YST-MS50/Y

36、ST-MS55DYST-MS55D4. Make sure that “The updated driver (Recom-mended)” lists “YAMAHA YST-MS55D USB Composite Device,” then click Next. The system displays the following panel: (See Fig. 5)The system displays the following panel: (See Fig. 4)Note: Depending on your system, a path other than “D:USB.IN

37、F” may appear.5. Click Next. The system starts installing the YAMAHA YST-MS55D USB Composite Device. Please wait awhile.The system displays the following panel: (See Fig. 6)6. Click “Finish” to complete the installation of the USB Composite Device. Fig. 4Fig. 5Fig. 68YST-MS50/YST-MS55DYST-MS55D The

38、system displays a panel to begin installing a Human Interface Device. (See Fig. 7)The system displays the following panel: (See Fig. 8) 7. Follow the screen instructions. Make sure that “The updated driver (Recommended)” panel lists “Human Interface Devices,” and click the Next button repeatedly as

39、in steps 25 until the following panel appears: 8. Click “Finish” to complete the installation of the Human Interface Device. The system displays a panel to begin installing a USB Audio Device. (See Fig. 9) 9. Follow the same screen instructions as steps 25. Make sure that “The updated driver (Recom-

40、mended)” panel lists “YAMAHA YST-MS55D USB Audio” in step 4, and click the Next but-ton repeatedly until the following panel appears: Fig. 7Fig. 8Fig. 99YST-MS50/YST-MS55DYST-MS55D CONFIRM 1 YAMAHA YST-MS55D USB Audio Open the window by the order of My Computer, Control Panel,System, and click the D

41、evice Manager or System Properties.Click the View devices by type .Confirm the YAMAHA YST-MS55D USB Audio. (See Fig. 11)Confirmed.Fig. 11To next confirmation.(4) Confirming the OS (Operating System)Confirm that the installed the YST-MS55D speaker device driver.There are 3 items in the YST-MS55D spea

42、ker device drivers.Befor confirming, 1)Make sure that the POWER switch on the rear panel of the subwoofer is turned on. 2)Connect the subwoofer to the USB port on the personal computer using the USB cable.There are 4 items in the confirmation as shown below.The system displays the following panel: (

43、See Fig. 10)10.Click “Finish” to complete the installation of the USB Audio Device.Fig. 1010YST-MS50/YST-MS55DYST-MS55D CONFIRM 2 Human Interface Devices Confirm the Human Interface Devices. (See Fig. 12)Confirmed.Fig. 12To next confirmation.11YST-MS50/YST-MS55DYST-MS55D CONFIRM 3 YAMAHA YST-MS55D U

44、SB Composite Device Confirm the YAMAHA YST-MS55D USB Composite Device. (See Fig. 13)ConfirmedFig. 13To next confirmation. CONFIRM 4 YAMAHA YST-MS55D USB Audio (1) Click the Audio of Multimedia Properties.Confirm the Playback .Confirm the YAMAHA YST-MS55D USB Audio (1) . (See Fig. 14)Confirmed.Fig. 1

45、4Completed the confirmation of OS.12YST-MS50/YST-MS55DYST-MS55DCAUTION:If not installed the YST-MS55D speaker device drivers, repeat install from the CD-ROM.(See page 610)2. STARTING THE USB PORT OPERATION CHECKThe USB port operation check is using the USB Compliance check Test Tool Version 2.6. Ins

46、tall the this Test Tool.Running the Test Tool.PLUG IN DEVICE (S) TO TEST! display.Fig. 15Connect the USB cable to the USB port of the personal computer.Pulg in the USB cable from Personal to USB INPUT on the rear panelof the Subwoofer. (See Fig. 16)Plug in theUSB Cable from thePersonal Computer.Fig.

47、 16Start the USB port operation check.13YST-MS50/YST-MS55DYST-MS55DRear panel of the Subwoofer3. DETAIL OF USB PORT OPERATION CHECKThere are 5 items in the USB port operation check as shown below. CHECK 1 00Vid (0X0499) Pid (0X3001) USB Compliance Tool, Version 2.6 display.Confirm the 99 Vid (0X0499

48、) Pid (0X3001). (See Fig. 17)Confirmation of USB EEPROM (IC201) opration is completed.Click the Full Test (See Fig. 17) for next check.Confirmed.Click.Fig. 1714YST-MS50/YST-MS55DYST-MS55D CHECK 2All is checked (). USB Chapter 9 Test display.Confirm that all is checked (). (See Fig. 18)Click the Star

49、t Automated Testing (See Fig. 18) for next check.Fig. 18All is checked ().Click.15YST-MS50/YST-MS55DYST-MS55D CHECK 3 Error Count : 0 Full Test Results display.Confirm the Error Count : 0 . (See Fig. 19)Operation of between USB IC and USB port is normal state.Enter automated to next check.Fig. 19Con

50、firmed.16YST-MS50/YST-MS55DYST-MS55D CHECK 4 OK USB Compliance Tool display.Confirm the OK . (See Fig. 20)Enter automated to next check.Fig. 20 CHECK 5 OK DEVICE IS HID display.Confirm the OK . (See Fig. 21)Completed the USB port operation check.Fig. 21Confirmed.Confirmed.17YST-MS50/YST-MS55DYST-MS5