Yamaha-KXE100-tape-sm 维修电路原理图.pdf

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1、COUNTERRESETMODEREC/PAUSEREC LEVELDIRECTIONMINMAXDOLBY NRNATURAL SOUND STEREO CASSETTE DECK KX-E100STANDBY/ONP.O.Box 1, Hamamatsu, JapanSERVICE MANUALSTEREO CASSETTE DECKKX-E100100687I CONTENTSTO SERVICE PERSONNEL . 1SPECIFICATIONS. 1DIMENSIONS . 2INTERNAL VIEW . 2REAR PANELS . 3DISASSEMBLY PROCEDUR

2、ES . 45ADJUSTMENT . 69DISPLAY DATA . 10IC DATA . 1112BLOCK DIAGRAM. 13PRINTED CIRCUIT BOARD . 1421SCHEMATIC DIAGRAM . 22PARTS LIST . 2331IMPORTANT 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.KX-E100RadioFans.CN 收音机爱 好者资料库KX-E100WALLOUTLETEQUIPMENTUNDER TESTAC LEAKAGETESTER OREQUIVALENTINSULATINGTABLE1I TO SERVICE PERSONNELCritical Components Information.Components having special characteristics are markedand must be replaced with parts having

9、 specificationsequal to those originally installed.WARNING: 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 Heal

10、th and Welfare Agency(and possibly other 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 REA-SON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When solderi

11、ng, 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 beforehandling food.I SPECIFICATIONSTypeAuto Reverse4-Track 2-Channel Playback/RecordingStereo Cassette DeckHeadsREC/PBHard

12、 permalloyEraseDouble Gap FerriteMotorsMainDC servo motorTray LoadingDC motorWow & FlutterW.PEAK (EIAJ)0.19 %W.RMS0.09 %Fast Winding Timeabout 100 seconds (C-60 tape)Frequency ResponseType I (Normal)30 15,000 Hz 3 dBType II (CrO2)30 16,000 Hz 3 dBType IV (Metal)30 18,000 Hz 3 dBS/N Ratio (S : 3rd ha

13、rmonic distortion 3 %, N : Weighted)NR off58 dBDolby B NR on66 dBDolby C NR on74 dBHarmonic Distortion1.0 %Channel SeparationMore than 40 dBCrosstalk (125 Hz)More than 55 dBInput Sensitivity/ImpedanceLine100 mV/30 kOutput LevelLine570 mV/3.0 kPower RequirementsU, C modelsAC120 V, 60 HzR modelAC110-1

14、20/220-240 V, 50/60 HzA modelAC240 V, 50 HzB, G modelsAC230 V, 50 HzPower Consumption12 W (Standby 3W)Dimensions (W x H x D)217 x 88 x 293 mm(8-9/16 x 3-7/16 x 11-9/16)Weight3.0 kg (6 lbs 10 oz.)AccessoriesInput & Output cords (RCA type) x 2, System cord x 1* Specifications are subject to change wit

15、hout notice.U . U.S.A. modelC . Canadian modelR . General modelA . Australian modelB . British modelG. European modelRadioFans.CN 收音机爱 好者资料库KX-E10012345217(8-9/16)80(3-1/8)8(5/16)88(3-7/16)275(10-13/16)7(1/4)11(7/16)Unit : mm (inch)293(11-9/16)2I INTERNAL VIEW1 MAIN P.C.B. (4)2 Cassette Mechanism Un

16、it3 MAIN P.C.B. (1)4 MAIN P.C.B. (2)5 MAIN P.C.B. (3)I DIMENSIONSKX-E1003I REAR PANELSM U, C modelsM R modelM A modelM B, G modelsKX-E10013435512Cassette Mechanism UnitHookFront PanelHookTop CoverCB201CB2094I DISASSEMBLY PROCEDURESRemove parts in disassembly order as numbered.1. Removal of Top Cover

17、a. Remove 4 screws (1) and 4 screws (2) in Fig. 1.b. Lift the Top Cover at the rear and move it rear-wardslantingly.2. Removal of Front Panela. Disconnect 2 connectors (CB201 and CB209) in Fig. 2.b. Remove 2 screws (3) and 2 screws (4) in Fig. 1.c. Detach the 2 hooks in Fig. 1 and then pull out the

18、FrontPanel forward.3. Removal of Cassette Mechanism Unita. Remove 4 screws (5) in Fig. 1.b. Disconnect 3 connectors (CB1, CB2 and CB3) in Fig. 3.Fig. 2Fig. 1KX-E100899HookRelay P.C.B.HookPinch Roller (R)Pinch Roller (L)Head Assy666677CB3CB2CB1F/R BeltMain BeltMain MotorHook56. Removal of Pinch Rolle

19、rDetach the hook and then remove the Pinch Roller inFig. 4.7. Removal of Head Assya. Remove 1 screw (8) and then remove the RelayP.C.B. in Fig. 4.b. Remove 2 screws (9) and then remove the Head Assyin Fig. 4.*Perform the adjustment of azimuth after installing theHead Assy.Fig. 44. Removal of Cassett

20、e Mechanisma. Remove 4 screws (6) in Fig. 3.b. Detach the hook in Fig. 3 and then pull out the CassetteMechanism.5. Removal of Main MotorRemove 2 screws (7) in Fig. 3.Fig. 3KX-E10061. Before adjustmentG Since head magnetization, dust accumulations, etc. arelikely to introduce error in the various ch

21、aracteristics, itis very important that the heads are properlydemagnetized and cleaned.G Make adjustments of mechanical system, playbacksystem and recording system in that order.G Except for azimuth adjustment, adjust in the forwarddirection.2. Instruments requiredG Audio frequency oscillatorG ACVM

22、or dual channel (ACVM)G DCVMG Wow/flutter meterG OscilloscopeG Frequency counterG Torque meterTW-2111A (TX911580) .Take up/back tension (FWD)TW-2121A (TX911570) . Take up/back tension (RVS)CT-160L (TX911120) . FF/REW3. Test tape requiredG MTT-111N (TX911650). Normal speedG MTT-114N (TX911680). Azimu

23、thG MTT-212N (TX911660).Playback levelG MTT-256 (TX911300) . Playback frequencyresponse (Normal)G MTT-356 (TX911310) . Playback frequencyresponse (CrO2)G Reference tapeType I/Normal (LH) . TDK AC225 (VU167200)Type II/High (CrO2). TDK AC514 (VU167300)Type IV/METAL. TDK AC713 (VU167400)I ADJUSTMENTSTE

24、ST MODE (Operation and Display Check)Enter the TEST MODE by pressing the STANDBY/ON key while pressing the STOP key and FF key when the power is OFF.NO.KEYFUNCTIONACTION1PLAYPLAYPlayback mode without the cassette tape. In this mode, cleaningthe REC/PB head.2STOPSTOPStop the playback mode.3DIRECTIOND

25、IRECTIONChange the playback direction.4FFDIMMERDimmed display when pressing the FF key. (6 step)5REWPHOTO MODEPhotograph mode.6DOLBY NRAll display segments lit.7REC/PAUSEVersionDisplay the program version and date when pressing the REC/PAUSE key.8MODEDisplay grid and segments short/open check. (Fig.

26、 A is OK)9COUNTER RESETEXITTo escape the TEST MODE.10POWEREXITTo escape the TEST MODE and power off.Fig. ADISPLAY (Light the all segment)DISPLAY CHECK (Light a segment of each grid)KX-E100VR101VR103LLLRRRVR104VR203VR204VR201VR202MAIN (1)MAIN (2)TAPE SPEED ADJ.PLAYBACK LEVEL ADJ.RECORDING LEVEL & BIA

27、S ADJ.RECORDING LEVEL & BIAS ADJ.Azimuth adjustment screw. (REVERSE)Azimuth adjustment screw. (FORWARD)OKRec out L : ch 1Rec out R : ch 2DC input, X-Y (Resurge) modeNGFig. B0.2V0.2V7KX-E1008Item to beAdjustedCheck eachtorqueCheck FF, REWtake up timeAzimthTape SpeedWow/ FlutterTapeCT-160L (FF, REW)TW

28、-2111A (FWD)TW-2121A (RVS)AC-514 (C-60)MTT-114N10kHz, 10dBMTT-111N3kHz, 10dBMTT-111N3kHz, 10dBStep12345ModeFF REWPLAYFF REWPLAYPLAYPLAYRatingFF, REW torque : within 70 150g/cm.Take up torque : 30 70g/cm.Back tension : 1.5 6g/cm.80 to 120 seconds.Playback output of L and R ismaximum and phase differe

29、nce shouldbe minimum both directions. (Fig. B)2980 Hz 15 HzLess than 0.19% (WRMS)RemarksAfter the adjustmentmake sure to apply screwlock paint.Perform adjustment atthe center of the testtape, if possible.Confirm at center of thetest tape, if possible.InstrumentrequiredTorque meterACVMoscilloscopeFre

30、quencycounterWow/FluttermeterAdjustmentpartAzimuthadjustmentscrew.(Fig. B)VR101MECHANICAL ADJUSTMENTRating 5 dBV 0.3 dBVCheck that the 10kHz playback levelis within 0 3 dB of the 1kHzplayback level. (Fig. C)Item to beAdjustedPlaybacklevel(315Hz)Confirmationof playbackfrequencyresponseStep12Points of

31、measurementLINE OUTLINE OUTModePLAYPLAYInstrumentrequiredACVMACVMoscilloscopeTapeMTT-212N315Hz,250nwb/mTest tape for frequency check.3180s + 120s (LH) (MTT-256)3180s + 70s (CrO2) (MTT-356)AdjustmentpartsVR201 (L ch)VR202 (R ch)ELECTRICAL ADJUSTMENTG Use 560 mV (250 nwb/m) for 0 dB as the standard le

32、vel of the unit.0 dB = 250 nwb/m (315 Hz) = 7 dBV (Rec out level) 4dB 3.5dB1k 3dB 3dB3k10kHz3152505012.5kHzFig. CG PLAYBACK FREQUENCY RESPONSEKX-E100 4dB 4dB1k 3dB 3dB3k10kHz3152505012.5kHzFig. D9GTOTAL FREQUENCY RESPONSE ( 20 dBV)Dolby NR OFF / B on / C onType I (Normal) / Type II (High) / Type IV

33、(METAL)RatingAdjust for equal record andplayback levels.( 25 dBV 0.3 dBV)Adjust for equal record andplayback levels.( 25 dBV 0.5 dBV)Adjust for equal record andplayback levels. (Fig. D)Perform record bias adjustmentof High (CrO2) tape again, if therating was not satisfied.Confirm recorded level rati

34、ng asin step 1 when recorded levelrating is improper, go back tostep 1 and also carry outadjustments in step 2 again.Item to beAdjustedRecordinglevelRecordingbias(Totalfrequencyresponse)Confirmationof recordedlevelStep123Points ofmeasurementLINE OUTLINE OUTLINE OUTModeRECPLAYRECPLAYRECPLAYInstrument

35、requiredACVMAudiofrequencyoscillatorACVMAudiofrequencyoscillatorACVMAudiofrequencyoscillatorMeasurementconditionsInput 315 Hz Signal toLINE IN from AudioFrequency Oscillator.Adjust output level ofAudio FrequencyOscillator so that thevoltage of LINE OUTbecomes 25 dBV.Input 12.5 kHz Signal toLINE IN f

36、rom AudioFrequency Oscillator.Adjust output level ofAudio FrequencyOscillator so that thevoltage of LINE OUTbecomes 25 dBV.TapeAC-514High(CrO2)AC-514High(CrO2)AC-225Normal(LH)AC-514High(CrO2)AdjustmentpartsVR203 (L ch)VR204 (R ch)VR103 (L ch)VR104 (R ch)KX-E100PATTERN AREA1101831G VO301 : BJ707GNK (

37、V358690)G PIN CONNECTIONG GRID ASSIGNMENTG ANODE CONNECTIONPin No.12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31F1 F1 NP P1 P2 P3 P4 P5 P6 P7 NX NX NX NX NX NX NX 1G 2G 3G 4G 5G 6G 7G 8G 9G10G 11GNP F2 F2ConnectionNote : 1) F1, F2 . Filament 2) NP . No pin 3) NX . No exte

38、nded pin 4) 1G 11G . Grid1G2G3G4G5G6G7G8G9G10G11GP1aaaaS1S1S1S1P2bbbbB1B1B1B1P3ccccB2B2B2B2P4ddddB3B3B3B3P5eeeeB4B4B4B4P6ffffB5B5B5B5P7ggggB6B6B6B6E-10/J-8I DISPLAY DATAKX-E100A-D Convert(10 bit x 12 ch)Serial I/OSerial I/O 2 (Clock synchronization/UART)Serial I/O 1 (Clock synchronization)(256 byte

39、automatic transmission)Buzzer outputWatch dog timerPort P0 (8)8ROMRAMInterrupt controllerLCD display40 Control terminals(36 register port)PWM1 (8 bit)PWM0 (14 bit)TimerSystem clockTimer X (16 bit)Timer 1 (8 bit)Timer 2 (8 bit)Timer 3 (8 bit)Timer 4 (8 bit)Timer 5 (8 bit)Timer 6 (8 bit)XIN - XOUT(Mai

40、n clock)XCIN - XCOUT(Sub clock)Internal peripheral functionI/O PortCPU coreMemoryPort P5 (8)8Port P6 (6)6Port P7 (8)8Port P8 (8)8Port P9 (2)2Port P1 (8)8Port P2 (8)8Port P3 (8)8Port P4 (8)7164P20/Buz02/FLD063P21/FLD162P22/FLD261P23/FLD360P24/FLD459P25/FLD558P26/FLD657P27/FLD756P00/FLD855P01/FLD954P0

41、2/FLD1053P03/FLD1152P04/FLD1251P05/FLD1350P06/FLD1449P07/FLD1548P10/FLD1647P11/FLD1746P12/FLD1845P13/FLD1944P14/FLD2043P15/FLD2142P16/FLD2241P17/FLD2340P30/FLD2439P31/FLD2538P32/FLD2637P33/FLD2736P34/FLD2835P35/FLD2934P36/FLD3033P37/FLD3132P80/FLD3231P81/FLD3330P82/FLD3429P83/FLD3528VEE27P84/FLD3626

42、P85/RTP0/FLD3725P86/RTP1/FLD38P57/SRDV2/SCLK22P56/SCLK21P55/TxDP54/RxDP53/SCLK12P52/SCLK11P51/SOUT1P50/SIN1AVSSVREFP65/SSTB1/AN11P64/INT4/SBUSY1/AN10P63/AN0P62/SRDY1/AN8P77/AN7P76/AN665666768697071727374757677787980P75/AN5P74/AN4P73/AN3P72/AN2P71/AN1P70/AN0P61/CNTR0/CNTR2P60/CNTR1P47/INT2RESETP91/XC

43、OUTP90/XCINVSSXINXOUTVCCP46/TSOUTP45/T1OUTP44/PWM1P43/BUZ01P42/INT3P41/INT1P40/INT0P87/PWM0/FLD39123456789101112131415161718192021222324E-11/J-9I IC DATAIC205 : M38B57M6-135FP (XW379A00)KX-E100E-12/J-10Pin No.PORTI/OINOUTRESISTOR1P75/AN5IMecha SW1AD(PLAY, Half)PU2P74/AN4ILoading SWAD(IN,OUT)PU3P73/A

44、N3IMeter LAD(-30 +6)4P72/AN2IMeter RAD(-30 +6)5P71/AN1IOperation 2AD(FF,REW,REC,COU,EJ)PU6P70/AN0IOperation 1AD(ST,PL,DIR,DOL,MOD)PU7P61/CN0,2ODOLBY-BB : H8P60/CN1ODOLBY-OFFOFF : HPU9P47/INT2IAC Pulse10RESETIResetReset : LPU11P91/XCOOMETALMETAL : H12P90/XCIOHIGHHIGH : H13VSSGND14XIN4MHz15XOUT4MHz16V

45、CCVu17-22P41-P46I(Pull down)PD23P40/INT0IPower SWON : LPU24P87/PWMOREC MUTEON : L (PWMControl)25-27P84-P86I(Pull down)PD28VEE-22V29P83/FL35IPower ONON : H30P82/FL34OFL-DIG11ON : HPD31P81/FL33OFL-DIG10ON : HPD32P80/FL32OFL-DIG9ON : HPD33P37/FL31OFL-DIG8ON : H34P36/FL30OFL-DIG7ON : H35P35/FL29OFL-DIG6

46、ON : H36P34/FL28OFL-DIG5ON : H37P33/FL27OFL-DIG4ON : HPin No.PORTI/OINOUTRESISTOR38P32/FL26OFL-DIG3ON : H39P31/FL25OFL-DIG2ON : H40P30/FL24OFL-DIG1ON : H41-48P10-P17O(Open)49P07/FL15I(Open)50P06/FL14OFL-SEG7ON : H51P05/FL13OFL-SEG6ON : H52P04/FL12OFL-SEG5ON : H53P03/FL11OFL-SEG4ON : H54P02/FL10OFL-S

47、EG3ON : H55P01/FL9OFL-SEG2ON : H56P00/FL8OFL-SEG1ON : H57-64P20-P27I(Pull down)PD65P57/SC22ISYS-IN66P56/SC21OSYS-OUT67P55/TDIReel pulse68P54/RDOSolenoidON : HPD69P53/SC12OMain motorON : HPD70P52/SC11OLoadingIN : HPD71P51/SO1OLoading+OUT : HPD72P50/SI1ON/H/MNOR:L,HIGH:M,MET:H73AVSSGND74VREF+5V75P65/A

48、N11OBIASON : LPU76P64/AN10OREC/PBPB : LPD77P63/AN9I(Pull down)PD78P62/AN8OLINE MUTEON : LPD79P77/AN7IMecha SW3AD(Error erase F,Error erase R)PU80P76/AN6IMecha SW2AD(70,METAL)PUAD INPUT PORTPINNAMEVOLTAGE AREASTANDARD VOLTAGEMODE6AN0 (ope 1)4.58 5.005.00OFF3.75 4.584.172.92 3.753.34MODE2.10 2.922.51D

49、OLBY1.25 2.101.67DIREC.0.41 1.250.83PLAY0.00 0.410.00STOP5AN1 (ope 2)4.58 5.005.00OFF3.75 4.584.172.92 3.753.34EJECT2.10 2.922.51COUN.1.25 2.101.67REC0.41 1.250.83REW0.00 0.410.00FFKX-E100T401POWER ON(Q115, 116)FILAMENTPOWER ONTAPE SELECTOR(Q108,109)POWER ONPOWERSUPPLYIC103IC104Q117Q120-22VVU5+12VVA

50、FL DISPLAYMMMAIN MOTORSOLENOIDLOADING MOTORCASSETTEMECHALOADINGUNITDOLBY B/C NR(IC203)OPERATIONSWITCH(SW301311)COMIC205LOADINGCONTROL(IC101)MECHA CONTROL(VR101, Q101,104)MECHA SENSORSYSTEMCONNECTOR(JK101)REEL PULSERESETA/DAC PULSEMETER LEVELTAPE SELECTORDOLBY CONT3456MAB9S078BIAS ON/OFFREC MUTENLINE