Yamaha-KXE300-tape-sch 维修电路原理图.pdf

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Yamaha-KXE300-tape-sch 维修电路原理图.pdf

ABCDEFGH123456IJKLMN78910KX-E30021ISCHEMATIC DIAGRAM* All voltage are measured with a 10M/V DC electric volt meter.* Components having special characteristics are marked Zand must bereplaced with parts having specifications equal to those originally installed.* Schematic diagram is subject to change without notice.BCEBCEPIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.2SD23942SB12372SD1858DTC114ESDTC144ES2SC1740S2SD1915F2SA933SDTC143XS2SB1237PC1330HAAll diodesAnodeCathode19BA613819LB1641CXA1560SNJM7812FAAN78N05M38B57M6-135FP110ECBNJM2043L-D18OUTCOMINECB11122CXA1597P1242540416465801816IC103 : NJM7812FAIC104 : NJM78N05Voltage RegulatorIC101 : LB1641Motor DriverIC102 : BA61381/2 Power Compressor Amp.IC201 : uPC1330HA2 ch Head SelectorIC202 : NJM2043L-DOP Amp.IC203 : CXA1560SDolby B-C NRIC204 : CXA1597PRecording EqualizerINPUTOUTPUTCOMMON23P15IN 11GND4VZ6IN 2OUT 18VCC 210OUT 29P2INPUT LOGICPRE DRIVER7VCC 1943218756VregCOMPCOMPAMPAMPOUTOUTMUTVccDET1DET2GNDIN2OUT1OUT2MUTIN1INVERTERCOMPARATOR1SWR 12GND3SWP 14CONT5GND6VCC9SWR 28GND7SWP 2IN12+IN13VCC4+IN25IN26OUT27+VCC8OUT11+22212019181716151413121234567891011IREFMOAMOASSKSSKHLSHLSHDETLDETLDETHDETLLSLLSREC AMPREC AMPModeControlVccVEEVCTPBIN1LINEIN1MPXIN1MPXOUT1LINEOUT1TCH1TCL1RECOUT1MODEVCCIREFPBIN2LINEIN2MPXIN2MPXOUT2LINEOUT2TCH2TCL2RECOUT2NRSWVEECONTROLVGBIASREC EQ1REC EQ2Gp CALREC MUTEREC CALREC IN2IREFBOOST2VCCREC OUT2SPEEDTAPE EQDGNDREC IN1GNDBOOST1VEEREC OUT116115214313412511610798The voltages are measured using normal tape in the PLAY mode (no-signal condition).Only the voltage in ( ) are in the REC mode.0(0)02.62.14.74.74.8-0.1-0.14.7(4.7)4.2(4.2)4.2(4.2)0(0)-0.10004.800004.600000(4.7)4.80000004.72.22.02.02.00-16.3-16.3-16.3-16.3-19.3-19.3-19.3-19.3-19.3-19.3-19.3000000004.704.6(4.7)1.7(1.6)04.74.84.800-22.24.5-19.3-19.3-19.3-19.3-19.3-19.3-19.30(0)0(0)4.6(4.7)0(0)0(0)0(0)0(0)0(0)0(0)0(0)0(0)0(0)4.2(4.2)()()12.0(12.0)12.0(12.0)12.0(12.0)12.1(12.1)12.1(12.1)11.3(11.3)0(0)0(0)0(0)0(4.7)0(0)8.6(4.9)0(0)0(0)0(0)4.4(5.1)4.4(5.1)4.4(5.1)0(0)0(0)0(0)0(0)4.2(4.2)4.2(4.2)4.4(5.1)4.4(5.1)4.5(5.1)8.6(9.9)6.0 (6.0)1.2 (1.2)6.0 (6.0)6.0 (6.0)6.0 (6.0)6.0(6.0)6.0(6.0)6.0(5.9)0.3 (0.3)6.0 (6.0)6.1(6.0)0 (0)()6.0 (5.9)6.0(6.0)6.0(6.0)6.0 (6.0)0(10.1)12.1(12.1)6.0(5.9)()0.3 (0.4)0(10.1)0(10.1)4.8(0)0(0)0(0)0(0)0(0)0(2.4)0(0)6.0(6.0)6.0(6.0)6.0(6.0)0(0)6.0(6.0)3.5 (3.5)0(4.7)2.3(2.3)6.0(6.0)1.2(1.2)6.0(6.0)12.1(12.1)6.0(6.0)2.3(2.3)0(0)0(0)0(0)0(0)4.6(4.6)4.8(0)0(4.7)4.8 (4.8)4.7(4.7)4.3(4.3)4.8(4.8)4.7(4.7)5.5(5.5)5.5(5.5)0(6.0)0(0)0(7.8)0(7.8)0(0.1)0(0.1)0(0.1)0 (0.1)4.7(4.7)0(0)0(0)0(0)0(0)0(0)0(0)0(0)0(4.6)0(0)9.9(0)0 (3.9)0(3.9)0(3.3)0(8.5)0(8.5)19.4(19.1)()()2.0(2.0)0(0)0(0)0.5(0.5)0.7(0.7)0.4(0.6)0(0)0(0)0(0)12.1(12.1)0.7 (0.7)0.5 (0.5)2.0(2.0)()()11.4(11.3)4.2(4.2)3.7(3.7)0(0)0(0)0(0)0(0)-0.1(0)0(0)0(0)0(0)0(0)7.0(7.1)12.6(12.6)12.6(12.6)12.1(12.1)12.1(12.1)19.4(19.2)19.4(19.2)19.4(19.1)19.4(19.1)19.4(19.1)19.4(19.1)1.6(1.6)AC3.2AC24.7AC16.919.4(19.1)5.5(5.5)0.6(0.6)19.2(19.0)4.2(4.2)3.5(3.5)-15.7-16.8(-16.8)-22.2(-22.2)-22.8(-22.8)0(0)0(0)0(0)0(0)0(0)0.5(0)0.5(0)-28.7(-28.5)-28.8(-28.6)-15.7-16.3-16.3-16.3- 16.3TAPE SPEED ADJ.PLAYBACK LEVEL ADJ. (R ch)PLAYBACK (L ch)PLAYBACK LEVEL ADJ. (L ch)RECORDING LEVEL ADJ. (L ch)RECORDING LEVEL ADJ. (R ch)RECORDING BIAS ADJ. (L ch)RECORDING BIAS ADJ. (R ch)RECORDING (R ch)M8M7M9D7D2D8wqweREC/PB CONTROLPB AMP.DOLBY B-C NRREC AMP.BIAS OSCBIAS ON/OFFMETER DRIVERPOWER SUPPLYLOADING CONTROLOPERATION SWFL DISPLAYSYSTEM CONTROL123456789101112131. R REC2. METAL3. F REC4. CASS IN5. CrO26. +SOL7. SENSOR OUT8. +5V SENSOR9. PLAY SW10. +MTR11. COM12. MTR SPEED B13. MTR SPEED AMAIN PCB+BAMABUCHIMTRMECHA CHASSISPH TYPE (JST)SOL123451. LOAD OUT (+)2. LOAD IN (+)3. LOAD OUT4. COM5. LOAD INLOADING PCBPH TYPE (JST)MTR+1. LchR / P HDPH CONNECTOR+LRE HD+2. Lch 3. Rch 4. Rch +5. E6. E+CASSETTE MECHANISMCB2CB1CB3LOADING PCBMAIN PCBCB2CB3CB1M38B57M6-143FP 電圧、内部抵抗10M電圧計測定。 Z印部品、安全性確保部品示。部品交換必要場合、記載部品使用。本回路図、標準回路図。改良予告変更。Point q (Both end of C105) REC modeV : 20V/divH : 5 sec/divDC range1 : 1 probe0VPoint w CH1 : Pin 10 of IC205 CH2 : OUT of IC103V : 2V/div (CH1)V : 5V/div (CH2)H : 0.5 sec/divDC range1 : 1 probeCH 1CH 2*AC POWER ON*AC POWER OFFPoint e (Pin 15 of C205) REC modeV : 2V/divH : 0.1 sec/divDC range1 : 1 probe0VRadioFans.CN 收音机爱好者资料库

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