JVC-AXM9000-int-sm 维修电路原理图.pdf

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1、SERVICE MANUALNo.20933Apr.2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.AX-M9000AX-M9000Area SuffixEContinental EuropeMONAURAL INTEGRATED AMPLIFIERContentsSafety precautions -1-2Disassembly method -1-3Adjustment method -1-10Description of major ICs -1-1121PHASESPEAKER1211802123DOWNUP456PRESENCEEXT

2、PROCESSORLINEMUTEGA N CONTROLATTSLEEPEACHMONAURAL INTEGRATED AMPLIFIERAX M9000STANDBY ONRadioFans.CN 收音机爱 好者资料库AX-M90001-21. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to th

3、e original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations

4、 of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safe

5、ty-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are

6、 identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended repla

7、cement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the preve

8、ntion of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage currnet check (Electrical shock hazard testing)After re-assembling the product,

9、 always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this c

10、heck.Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed

11、 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known goo

12、d earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and

13、 repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standar

14、ds are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.Good earth groundPlace this probe on each exposedmeta

15、l part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.In regard with component parts appearing on the silk

16、-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the ma

17、nufacturer. (Except the JC version)RadioFans.CN 收音机爱 好者资料库AX-M90001-3Remove the three screws A attaching the metal cover on the back of the body.Remove the four screws B attaching the metal cover on both sides of the body using a hexagon wrench. Draw the metal cover upward from the behind while pull

18、ing the both sides of the lower part of the metal cover outward. 1.2.3.Disassembly methodRemoving the metal cover (See Fig. 1)Prior to performing the following procedure, remove the metal cover.Remove the six screws C attaching the top plate using a hexagon wrench.Remove the six screws D and tow scr

19、ews D attaching the front panel assembly from the back of the body.Remove the four screws E attaching the front panel assembly from the upper part of the body.Remove the four screws F attaching the front panel assembly on both sides of the body.Disconnect the harness from the connectors CN601, CN602

20、, CN603, CN604 and CN605 of the system control board assembly. Remove the screw G attaching the earth wire.* The front panel assembly of this machine comprises the three sets - the front panel (left), front panel (right) and sub-panel (center). 1.2.3.4.5.6. Removing the front panel assembly (See Fig

21、. 2 to 5)Fig.2Fig.3B 2ACEDFig.4CN602CN603CN604CN601CN605 Metal coverFig.1 Top plateFront panel assemblyFront panel assemblySystem control board assembly Fig.5B 2F 2F 2GEarth wireDAX-M90001-4Removing the rear panel (See Fig.6 to 9)1.2.3.4.5.Prior to performing the following procedure, remove the meta

22、l cover and front panel assembly.Remove the four screws H attaching the rear panel on the back of the set.Remove the eight screws I attaching the rear panel on the upper part of the set.Remove the six screws J, two screws K, nine screws L and one screw M attaching the rear panel.Draw the rear panel

23、upward from the behind at the legs while pulling the rear panel outward. Remove the four screws N attaching the speaker output cord.* If necessary, remove the power plug, connector clamp, etc.Fig.6Fig.7Fig.8HFig.9IIJLJKJRear panel LMNNRear panel (Bottom)AX-M90001-51.2.Prior to performing the followi

24、ng procedure, remove the metal cover and front panel assembly.Remove the ten screws O attaching the control switch board assembly 1 & 2 on the back side of the front panel assembly (left & right sides).Remove the four screws P attaching the metal base on the backside of the sub-panel assembly (cente

25、r).Remove the four screws Q on the backside of the metal base. Then the display board assembly can be removed. 1.2.3.Removing the control switch board assembly 1 & 2 and display board assembly (See Fig.10 to 11)Prior to performing the following procedure, remove the metal cover and front panel assem

26、bly.Remove the four screws R attaching the system control board assembly.Disconnect the connectors CN611, CN612, CN613, CN614, CN615 and CN616. Removing the system control board assembly (See Fig. 12)Fig.12Fig.10POOQRRCN611CN614CN613CN616CN612CN615Front panel (right)Control switch board (1)Front pan

27、el (left)Control switch board (2)Display boardSystem control board assemblyFig.11Sub-panelMetal baseMetal baseAX-M90001-61.2.3.4.5.6.7.8.Prior to performing the following procedure, remove the metal cover, system control assembly and rear cover. Remove the six through bolts S attaching the heat sink

28、 and the heat sink cover.Remove the eleven screws T attaching the power AMP sub-board assembly.Disconnect the harness, which is extending from power transformer, from the connectors TB401, TB402, TB403 and TB404.Disconnect the harness, which is extending from the power transformer for pre-AMP, from

29、the connectors CN401 and CN402.Disconnect the harness, which is extending from the fan, from the connector CN453.Disconnect the harness, which is extending from the signal processing board, from the connector CN301. After removing each screw U attaching the power AMP sub-board assembly (1) & (2), ta

30、ke off the power AMP sub-board assembly from the heat sink. Remove the seven screws V attaching transistor Q335Q340.Removing the power AMP board assembly / heat sink (See Fig. 13 to 15)Fig.14Fig.13TB401TB402CN402CN40111CN301CN453TB403TB404Power AMP sub-board assembly (1) (2)Heat sink coverPower AMP

31、boardSignal processing boardTUSFig.15VTransisitor Q335Q340.Power AMP boardHeat sinkAX-M90001-7Prior to performing the following procedure, remove the metal cover and the rear panel.Remove the current mode source selector board assembly and the rear terminal panel. Remove the five screws Y attaching

32、the signal processing board assembly.Remove the connectors CN251 and CN252. 1.2.3.Prior to performing the following procedure, remove the metal cover and the rear panel.Remove the six screws W attaching the RCA pins on the current mode source selector board assembly. Then, the current mode source se

33、lector board can be removed.Remove the four screws X attaching the cannon connector on the signal processing board.Then, the rear terminal panel can be removed. 1.2.3.Removing the current mode source selector board assembly and rear terminal panel (See Fig. 16)Removing the signal processing board as

34、sembly (See Fig. 17)Removing the power switch board assembly (See Fig. 18)Prior to performing the following procedure, remove the metal cover.Remove the four screws Z attaching the power switch board assembly.Remove the cable connecting to the transformer. 1.2.Fig.17Fig.18Fig.16WXCurrent mode source

35、 selector board assemblyRear terminal panelYYZSignal processing boardPower switch boardAX-M90001-81.Prior to performing the following procedure, remove the metal cover.Remove the two screws A attaching the power transformer for pre-AMP.1.Removing the core transformer for pre-AMP (See Fig. 19)Removin

36、g the transformer for power AMP (See Fig. 20)Prior to performing the following procedure, remove the metal cover and the front panel assembly.Remove the four screws B attaching the power transformer for power AMP. Fig.20Fig.19ABPower transformer for pre-AMPPower transformer for power AMPAX-M90001-9C

37、LAMPWR104WR103WR10213P12P8PCLAMPCLAMPCLAMPBlack wirePurple wireRed wireGray wireYellow, Brown wireCN insertionOrange, Blue wireCN insertionRed, Black wireCN insertionFig 1.Fig 2.Arrangement drawings for the clamp binding In order to secure the performance of the machine, refer to the following arran

38、gement drawings when the lines are clamped.White wire 2Red wire 2White RED wireBrown wireS CLAMPRed wire 2Black wireWhite wireRed wireS CLAMPS CLAMPS CLAMPAX-M90001-10100Hz More than 70dB1kHz More than 70dB10kHz More than 70dB100Hz More than 70dB1kHz More than 70dB10kHz More than 70dB Adjustment met

39、hod 2. Adjustments and confirmation RemarksFive minutes later after turning the power on DescriptionStandard outputTotal distortion factorOutput levelHum noiseFrequency characteristicsAC voltage of speaker terminalAdjustments of idling currencyConfirmation of idling currencyCrosstalk Adjusting metho

40、d1) INPUT LINE1 - Output at the time of THD0.5% at f=1kHz1) INPUT LINE1 - Distortion factor at the time of 200W (40.0V) at 8 load1) Output level at the time when inputting 1kHz 200mV to LINE 11) Line 11) No signal, no load, Vol. 0.01) Prior to turning the power on, turn the R398 counterclockwise ful

41、ly2) After connecting the 3 pin and 4 pin of the CN303 to the electronic voltmeter, adjust the voltage to 2-3mV.3) After elapsing five minutes, adjust the voltage to 3.5+/-0.5mV. Since there is backlash, thoroughly adjust it.4) After elapsing two minutes, make sure that the voltage falls within 3.5-

42、7mV. In case where the voltage does not fall within the specified value, readjust it to the values specified in 3) above.1) No signal, no load, rated power Confirm under the room temperature of 20-251) INPUT LINE 1 - The output at the input terminal side shall be +20dBm as a standard.The CH to be me

43、asured shall be terminated at 10k Standard valueMore than 210W/8 (41.0V)192mV +/- 10mV Less than +/- 1mV 20Hz Less than 0.04%1kHz Less than 0.04%20kHz Less than 0.06%Line1 to Line2Line1 to Line5100Hz1kHz10kHzVol. 99. 5Vol. 99. 5Vol. 69. 5Vol. 44. 0Vol. 99. 545.6dB 1dB45.6dB 1dB33.4dB 1dB ATT ON31.0d

44、B 1dB5.8dB 1dB45.6dB 1dBLess than 10mVLess than 0.4mV 1) Line 1 2) Base humInput shortVolume min.1. List of measuring devices Measuring devices : Electronic voltmeter Oscilloscope Low-frequency transmitter (50Hz-20 kHz of transmitting frequency and output of 0 dBs at the 600 terminal) Distortion fac

45、tor tester (with a built-in band path filter) AX-M90001-11BU2114F-X (IC542,543,544) : LED controllerSINCKLATCHSOUTENRSTGNDGNDGNDVDD01020304050607081. Pin layout2. Pin function SymbolSIN CK LATCH SOUT EN RST GND GND GND 0807060504030201VDD123456789181716151413121110Pin No.123456789101112131415161718I

46、/OIIIOII-OOOOOOOO-Function Serial data input terminal Shift lock of the shift register When this terminal is set at L, the latch output will be secured, In addition, when the output of the shift register is changed during H, the latch output will be changed simultaneously.Output of the shift registe

47、r at the final stageEnable terminals of 01 to 08Reset of the shift register and latch GroundGroundGroundOutput of the shift register at the 8th stageOutput of the shift register at the 7th stageOutput of the shift register at the 6th stageOutput of the shift register at the 5th stageOutput of the sh

48、ift register at the 4th stageOutput of the shift register at the 3rd stageOutput of the shift register at the 2nd stageOutput of the shift register at the 1st stagePower supplyDescription of major ICsAX-M90001-12MN101CP10A(IC521) : System controller1161732334849641.Pin layout2. Pin functionPin No.12

49、345678910111213141516171819202122232425262728293031SymbolKY10 (DOWN)KY11 (LINE)KY12 (MUTE)TMP IN1TMP IN2VREF+VDDOSC2OSC1VSSXIXOMMODSADATOSADATISACLKSBDATOSBDATISBCLKSREQORSTVOLCSVOLCLKVOLDATOATTMUTE LEDM.WAKESREQIINHROT3ROT2I/OIIIIIOIIOIOIOOIIOIOOOOOIIIIIPin No.32333435363738394041424344454647484950

50、5152535455565758596061626364SymbolROT1CBAPOWERABSMONPROALLEACHPRESEN1PRESEN2SPKBSPKAFANHGM1GM2HPSLRSTFANLLDATOLCLKLACHB.CONRMKY1 (HPS)KY2 (EACH)KY3 (PRO)KY4 (PRE)KY5 (SP)KY6 (PHASE)VSSKY7 (POWER)KY8 (ATT)KY9 (UP)I/OIOOOOOOOOOOOOOOOOOOOOOOIIIIIIIIIPin functionKey input 10Key input 11Key input 12Tempe