Yamaha-MS400-spk-sm 维修电路原理图.pdf

MS4001SERVICE MANUALPA01155620001210-98000 1.415K-215 K Printed in Japan 2000.12HAMAMATSU, JAPANThis document is printed on chlorine free (ECF) paper with soy ink.POWERED SPEAKER CONTENTSSPECIFICATIONS. 3DIMENSIONS. 4BLOCK DIAGRAM. 4PANEL LAYOUT. 5CIRCUIT BOARD LAYOUT. 6WIRING. 7DISASSEMBLY PROCEDURE. 8IC BLOCK DIAGRAM. 10CIRCUIT BOARDS. 11INSPECTIONS. 16OVERALL CIRCUIT DIAGRAM. 19PARTS LISTMS400RadioFans.CN 收音机爱 好者资料库MS4002 2IMPORTANT NOTICEThis manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumedthat basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and under-stood 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 per-sonal injury, destruction of expensive components and failure of the product to perform as specified. Forthese reasons, we advise all Yamaha product owners that all service required should be performed by anauthorized Yamaha Retailer or the appointed service representative.IMPORTANT :This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship ofany form.The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, andservice departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitableand changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING :Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect tothis bus.)IMPORTANT :Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply powerto the unit.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production 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 harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSO EVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or exposeeyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handlingfood.WARNINGComponents having special characteristics are marked and must be replaced with parts having specification equal to thoseoriginally installed.2RadioFans.CN 收音机爱 好者资料库MS4003SPECIFICATIONSGeneral specificationsTypeAmp.unitHF:100W at 5kHz, THD=1%, RL=16 ohmsBi-Amp 2-way bass reflex powered speaker(Bi-amp lifier electronic crossover network)Speaker unitLF : 38 cm coneHF : 5 cm Titanium diaphragm compression driverFrequency Range . 50 Hz16 kHz (-10 dB)Maximum Output Level . 124.5 dB (1m on Axis)Directional angle . 90 (H)/40 (V)Dimension (W x H x D) . 449 x 683 x 379 mmWeight . 24.2 kgColor . Black (approx.Munsell value:5PB 2/1)Tripod diameter pole . 3536 mmAccessories . Power cord (AC inlet type, 2.5 m)Maximum Output PowerLF: 300W at 500Hz, THD=1%, RL=4 ohmsCross over frequency . 1.6 kHz (30dB/oct.)Input Sensitivity . LINE: +4dB*, MIC: -50dB*Input impedance . LINE: 30 kohms, MIC: 5 kohmsControlsLEVEL . LINE, MIC , MASTEREQ . LOW: 0 (Max.) -10 dB (Min.) at 55 HzHIGH: 3 dB (HF)Power switch . On/OffConnectors (all balanced):LINE in/out . XLR-3-31, XLR-3-32, phone(They are all connected in paralleland can be used as line outputs.)MIC in . XLR-3-31POWER indicator . Green LEDPower Requirement USA and Canada . 120 V, 60 HzEurope . 230 V, 50 HzOthers . 240 V, 50 HzPower Consumption . 120 WAccessor ies . Bracketadapter BAD251 (forBWS251-400, BCS251, and BBS251)* 0 dB=0.775 VFor European ModelPurchaser/User Information specified in EN55103-1 andEN55103-2.Inrush Current: 25AConformed Environment: E1, E2, E3 and E4MS4004DIMENSIONSBLOCK DIAGRAMUnits: mm683379449203241M8Remove the cover when you use optional bracketsLOW CUTP.AMPP.AMPMic InputIC102VR101VR104VR105VR103IC104IC107IC108IC106IC105VR1022131315751513213IC101LineMicMasterLPFHPFFreq. response compensationLFHFSPEAKERSPEAKERLine Input/OutputLOWEQHIGHEQPhone JackHPFAMP 4/5AMP 5/5AMP 1/5CN102-6CN101-6CN102-4CN101-4CN201-6CN103-6CN201-4CN203-3(LF-),CN203-4(LF+)CN203-1(HF+),CN203-2(HF-)CN103-4MS4005132231132LOWHIGHLEVELLEVELLEVEL912345678TONE CONTROL123456789PANEL LAYOUTPOWER switchAC IN connectorLINE connectorsLINE LEVEL controlMIC connectorMIC controlMASTER LEVEL controlPOWER indicatorTONE CONTROL Rear PanelMS4006CIRCUIT BOARD LAYOUT1/55/54/52/53/5AMPAMPAMPAMPAMPMS4007WIRING1/5SpeakersWFTWCN203CN201CN202CN1035/5CN102CN1014/5TransformerCN2043/5CN205P.SWAC.IN2/5YEBLCN208CoilH onlyAMPAMPAMPAMPAMPMS4008DISASSEMBLY PROCEDUREFig.11.Amplifier assembly1-1.Remove the sixteen (16) screws marked 180A. Theamplifier assembly can then be removed. (Fig. 1)2.Cabinet assembly and buffle assembly2-1.Remove the nineteen (19) screws marked 170. Thebuffle assembly can then be removed from thecapinet assembly. (Fig. 1)3.Speakers (38cm, 25mm)3-1.Remove the buffle assembly from the cabinetassembly. (See Procedure 2.)3-2.To remove the 38cm speaker, remove the four (4)screws marked 180B and the front grille. (Fig. 1)3-3.Remove the eight (8) bolts marked 70. The 38cmspeaker can then be removed. (Fig. 1)3-4.To remove the 25mm speaker, remove the four (4)screws marked 120. Then remove the speaker withthe bracket. (Fig. 1)3-5.Remove the two (2) screws marked 100. The 25mmspeaker can then be removed from the bracket. (Fig. 1)70: Hexagonal Bolt 5.0 X 35 MFZN2BL (V6389200)120: Bind Head Tapping Screw-P 5.0 X 30 MFZN2BL (V6405200)170: Bind Head Tapping Screw-P 5.0 X 50 MFZN2BL (V6084800)180: Bind Head Screw-Giza 4 X 16 MFZN2BL (V6396400)170180B170180A180A7017038cm Speaker100RedBlackRedBlack25mm SpeakerRed markingYellowBlue120MS4009Fig.24.AMP Circuit Boards (1/5 to 5/5)4-1.Remove the amplifier assembly. (See Procedure 1.)4-2.Remove the screws and the knob from each circuitboard, which can then be removed. (Fig. 2)5.Power transformer5-1.Remove the amplifier assembly. (See Procedure 1.)5-2.Remove the four (4) screws marked 80B. The powertransformer can then be removed. (Fig. 2)80: Bonding Screw-B 4.0 X 12 MFZN2BL (V7242900)AMP1/590Bind Head Tapping Screw-B 3.0 X 12 MFZN2BL (VQ074600)10Circuit Board100Bind Head Screw SP 3.0 X 8 MFZN2Y (EG330290)4AMP2/580ABonding Screw-B 4.0 X 12 MFZN2BL (V7242900)2Circuit Board130Bind Head Screw 4.0 X 8 MFZN2BL (VP156800)1AMP3/5110ABonding Screw-B 3.0 X 8 MFZN2BL (VN413300)2Circuit BoardAMP4/5110BBonding Screw-B 3.0 X 8 MFZN2BL (VN413300)6Circuit BoardHexagonal Nut1AMP5/5150Knob MX-GREEN/D-GRAY (VU860200)2Circuit Board160Knob ORANGE/D-GRAY (VV625800)2170Knob RED/D-GRAY (VU860400)1200Button 3 X 25 MFZN2BL (V3289800)4PCB NameRef No.DescriptionQty80BHexagonal nut80A150160200170110B1001/590905/54/51202/53/5110A130AMPAMPAMPAMPAMPMS40010IC BLOCK DIAGRAMFig.3120: Bonding Screw-B 4.0 X 8 MFZN2BL (VR779900)6.Handle6-1.Remove the cabinet assembly. (See Procedure 2.)6-2.Remove the two (2) screws marked 70 and the two(2) nuts marked 80. The handle can then beremoved. (Fig.3)7.Heat sink7-1.Remove the amplifier assembly. (See Procedure 1.)7-2.Remove the AMP 1/5 circuit board. (See Step 4-2.)7-3.Remove the three (3) screws marked 120. The heatsink can then be removed. (Fig.2)8070NJM2068L-D (XM356A00) NJM4580L (XF195A00) Operational Amplifier(IC101,103,104,105,106,107,108)(IC102)1A2345678INV+INOUTAAA+VIN+INOUTBBB+B+11MS400CIRCUIT BOARDS AMP1/5 Circuit BoardComponent side3NA: V606200to AMP5/5-CN103to TransformerCN203:to SPEAKERNotes: VR201, VR202: Idling Adjustment VR.MS40012 AMP1/5 Circuit BoardPattern side13MS400Component side3NA: V606200to Coll(H model only)to Transformerto AMP2/5-W201A-W201Bto AMP3/5-CN205(Component side)AC INPSW AMP2/5 Circuit Board AMP3/5 Circuit BoardComponent sidePattern sidePattern sideMS40014 AMP4/5 Circuit BoardLINE PARALLELMICto AMP5/5-CN102+4dB+4dB-50dBPattern sideComponent side3NA: V60620015MS400Pattern side IN2/2 Circuit Boardto AMP1/5-CN201TONE CONTROLLOWLIVE LEVELMIC LEVELMASTER LEVELHIGHto AMP4/5-CN101Component side AMP5/5 Circuit Board3NA: V606200MS40016INSPECTIONS Amplifier unit1.Preparation1) Input terminalLINE INPUT (XLR)MIC INPUT (XLR)2) Output terminal: CN203 (VH4P)LF 1P(+) 2P(-), RL=4 ohms / Power capacity 500WHF 4P(+) 3P(-), RL=16 ohms / Power capacity 200Wor more3) LINE LEVEL: MAX (10)4) MIC LEVEL: MIN (0)6) TONE CONTROL HIGH: Center click position (0)7) TONE CONTROL LOW: MAX (0)8) The input signals should be in the form of sine wave.2.Inspection1) Power ON muting timeCheck that the muting function is cancelled and therelay turns on in 31 seconds after the power switchis turned on. Also, check that the power indicatorlights up.,2) Idling current adjustmentAdjust VR201 and VR202 so that the voltagebetween Pins 1 and 2 of CN206 and CN207becomes 10.2mV respectively.3) Midpoint potentialCheck the DC voltage of CN203 (VH4P) when nosignal is applied. It should be within 70mV both atLF (between Pins 1 and 2) and at HF (between Pins3 and 4).4) Gain / EfficiencyInput a 500Hz, -1dBu signal to the input terminalLine INPUT (XLR) and check that the output voltageat the output terminal LF is +281dBu. Also, checkthat the primary side power consumption at this timeis 18030W.5) Full harmonic distortionInput a 500Hz signal to the input terminal LINEINPUT (XLR) and check that the full harmonicdistortion when the output voltage at the outputterminal LF is 300W is THD+N=1% or less.Input a 5kHz signal to the input terminal LINE INPUT(XLR) and check that the full harmonic distortionwhen the output voltage at the output terminal HF is100W is THD+N=1% or less. This measurementshould be completed within 30 seconds.17MS4006) Output noise levelGround the input terminals LINE INPUT (XLR) andMIC INPUT (XLR) with a 600 ohm resistanceconnected to each terminal and measure the noiselevel at the output terminals LF and HF. Themeasured value should be as specified below. Usea DIN audio filter for the noise meter.LF -62dBuHF -65dBu7) Frequency response characteristicsInput -20dBu signals of 50Hz, 1kHz, 2kHz and 15kHzto the input terminal LINE INPUT (XLR). Using theoutput voltage measured at the output terminal LFwhen a 1kHz, -20dBu signal is input as standard(0dB), check that the output voltages measured atLF and HF are as specified below.8) Tone control high change characteristicsInput a 5kHz, -20dBu signal to the input terminalLINE INPUT (XLR), move the tone control high VRand check that the output voltage measured at theoutput terminal HF then is as follows, using theoutput voltage when the VR is at the center clickposition as standard (0dB).MAX(+3): +2.5dB 1dBMIN(-3):-3.5dB 1dB9) Tone control low change characteristicInput a 50kHz, -20dBu signal to the input terminalLINE INPUT (XLR), move the tone control low VRand check that the output voltage measured at theoutput terminal LF then is as follows, using the outputvoltage when the VR is at the MAX position asstandard (0dB).the MAX position as standard (0dB)MIN(-10): -9dB 1dB10) MIC inputInput a 500Hz, -55dBu signal to the input terminalMIC INPUT (XLR), set the MIC level to MAX (10)and check that the output voltage measured then is28 1dBu.11) Protection circuitApply DC+5V (power supply output resistance = 10kohm) between Pins 1 and 2 of the connector CN208and check that the relay turns off within 1 second.Also, check that it returns automatically within 10seconds when the input signal is shut off.Frequency (Hz)LFHF50+8.52.0dB-1k0dB-16.52.0dB2k-92.0dB-4.52.0dB15k-+6.52.0dBMS40018 Finished product inspection1.Preparation1) input terminal: LINE INPUT (XLR)2) OUTPUT:LFHF3) LINE LEVEL: MAX(10)4) MIC LEVEL: MIN(0)5) MASTER LEVEL: MAX(10)6) TONE CONTROL HIGH: Center click position (0)7) TONE CONTROL LOW: MAX(0)2.Inspection1) Input a 20Hz to 20kHz, 0.08V(-19.72dBu) sine wavesignal to the input terminal LINE INPUT (XLR) andcheck that none of the contact of the voice coil, airleakage and abnormal noise such as vibration noiseoccurs.Next, input music signals to the input terminal LINEINPUT (XLR), move each VR knob and check thatthe sound volume and tone quality change smoothlywithout producing noise.2) Phase of speaker outputCheck that the output at LF is in positive phase withrespect to the input signal and the output at HF is innegative phase with respect to the input signal. 6543HFGEDCBAAHGFEDCB1219338CA2-88180151/5Note : See parts list for details of circuit board component parts.3/5: Mylar Capacitor: Ceramic Capacitor2/5DESTINATIONMS400 OVERALL CIRCUIT DIAGRAM 1/2 (AMP 1/5, 2/5, 3/5)MS400MS400MS400to AMP 5/5-CN103SpeakerREGULATORN.CN.CN.CAC INNJM7815FA (XD853A00)REGULATOR231NJM7915FA (XD854A00)1: OUTPUT2: COMMON3: INPUT22: GND1: INPUT3: OUTPUT13REGULATOR -15V: Mica Capacitor: Metal Film Resistor: Flame ProofC. ResisterAMPAMPAMP 65431220HABGFCDEAHGBCFED4/55/5MIC(-50dB)(JACK)LINEPARALLEL(+4dB)(+4dB)MS400 OVERALL CIRCUIT DIAGRAM 2/2 (AMP 4/5, 5/5)MS400MS400MS40038CA2-8818015-CN201to AMP 1/5OP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPOP AMPAMPAMPPARTS LIST CONTENTSOVERALL ASSEMBLY. 2AMPLIFIRE ASSEMBLY. 4ELECTRICAL PARTS. 6 WARNINGComponents having special characteristics are marked and must be replaced with parts havingspecification equal to those originally installed.Notes : DESTINATION ABBREVIATIONSThe numbers “QTY” show quantities for each unit.The parts with “-” in “PART NO.” are not available as spare parts.This mark “ ” in the REMARKS column means these parts are interchangeable.The second letter of the shaded () part number is O, not zero.The second letter of the shaded () part number is I, not one.M:South African modelO:Chinese modelQ:South-east Asia modelT :Taiwan modelU :U.S.A. modelV :General export model (110V)W:General export model (220)N,X: General export modelY :Export modelA :Australian modelB :British modelC :Canadian modelD :German modelE :European modelF :French modelH :North European modelI :Indonesian modelJ :Japanese modelPOWERED SPEAKERMS400MS4002OVERALL ASSEMBLY2501701803015010C70C20C101301002020c20b20a120905080C90230240706040180220260190200C100220d220c220a220bC60C80C30C40AMPLIFIREASSEMBLY(See page 4)MS4003: New PartsREF NO.PART NO.DESCRIPTIONREMARKSQTYRANKRANK: Japan only*OVERALL ASSEMBLYOverall Assembly JJ(V640020)Overall Assembly UU(V640030)Overall Assembly HH(V640040)Overall Assembly AA(V640050)10Cabinet Assembly J(V640490)20Buffle Assembl