Yamaha-KXE-300-Schematic电路原理图.pdf

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1、ABCDEFGH 1 2 3 4 5 6 IJKLMN 7 8 9 10 KX-E300 21 ISCHEMATIC DIAGRAM * All voltage are measured with a 10M/V DC electric volt meter. * Components having special characteristics are marked Zand must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is

2、 subject to change without notice. BCE B C E PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS. 2SD23942SB1237 2SD1858 DTC114ES DTC144ES 2SC1740S 2SD1915F 2SA933S DTC143XS 2SB1237PC1330HAAll diodes Anode Cathode 1 9 BA6138 1 9 LB1641CXA1560SNJM7812FA AN78N05 M38B57M6-135FP 1 10 E C B NJM2043L-D

3、1 8 OUT COM IN EC B 1 11 22 CXA1597P 124 25 40 4164 65 80 1 8 16 IC103 : NJM7812FA IC104 : NJM78N05 Voltage Regulator IC101 : LB1641 Motor Driver IC102 : BA6138 1/2 Power Compressor Amp. IC201 : uPC1330HA 2 ch Head Selector IC202 : NJM2043L-D OP Amp. IC203 : CXA1560S Dolby B-C NR IC204 : CXA1597P Re

4、cording Equalizer INPUT OUTPUT COMMON 23 P1 5 IN 1 1 GND 4VZ 6IN 2 OUT 1 8 VCC 2 10 OUT 2 9 P2 INPUT LOGIC PRE DRIVER 7 VCC 1 9 4 321875 6 Vreg COMPCOMP AMPAMPOUTOUT MUT Vcc DET1DET2GND IN2 OUT1OUT2MUT IN1 INVERTER COMPARATOR 1 SWR 1 2 GND 3 SWP 1 4 CONT 5 GND 6 VCC 9 SWR 2 8 GND 7 SWP 2 IN1 2 +IN1

5、3 VCC 4 +IN2 5 IN2 6 OUT2 7 +VCC 8 OUT1 1 + + 2221201918171615141312 1234567891011 IREF MOA MOA SSK SSK HLS HLS HDETLDET LDETHDET LLS LLS REC AMP REC AMP Mode Control Vcc VEE VCT PBIN1 LINEIN1 MPXIN1 MPXOUT1 LINEOUT1 TCH1 TCL1 RECOUT1 MODE VCC IREF PBIN2 LINEIN2 MPXIN2 MPXOUT2 LINEOUT2 TCH2 TCL2 REC

6、OUT2 NRSW VEE CONTROL VG BIAS REC EQ1 REC EQ2 Gp CAL REC MUTE REC CAL REC IN2 IREF BOOST2 VCC REC OUT2 SPEED TAPE EQ DGND REC IN1 GND BOOST1 VEE REC OUT1 16 1 15 2 14 3 13 4 12 5 11 6 10 7 9 8 The voltages are measured using normal tape in the PLAY mode (no-signal condition). Only the voltage in ( )

7、 are in the REC mode. 0(0) 02.6 2.1 4.74.7 4.8 -0.1 -0.1 4.7 (4.7) 4.2(4.2) 4.2(4.2) 0(0) -0.1 0 0 0 4.8 0 0 0 0 4.6 0 00 0 0(4.7) 4.8 0 0 0 0 0 0 4.7 2.2 2.0 2.0 2.0 0 -16.3 -16.3 -16.3 -16.3 -19.3 -19.3 -19.3 -19.3 -19.3 -19.3 -19.3 0 0 0 0 0 0 0 0 4.7 0 4.6(4.7) 1.7(1.6) 0 4.7 4.8 4.8 0 0 -22.2 4

8、.5 -19.3 -19.3 -19.3 -19.3 -19.3 -19.3 -19.3 0(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

9、.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

10、.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

11、) 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、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) AC3.2 AC24.7 AC16.9 19.4 (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

13、) -28.8 (-28.6) -15.7 -16.3 -16.3 -16.3 - 16.3 TAPE 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) M 8 M 7 M 9 D 7 D 2 D 8 w q w e REC/PB C

14、ONTROL PB AMP. DOLBY B-C NR REC AMP. BIAS OSC BIAS ON/OFF METER DRIVER POWER SUPPLY LOADING CONTROL OPERATION SW FL DISPLAY SYSTEM CONTROL 1 2 3 4 5 6 7 8 9 10 11 12 13 1. R REC 2. METAL 3. F REC 4. CASS IN 5. CrO2 6. +SOL 7. SENSOR OUT 8. +5V SENSOR 9. PLAY SW 10. +MTR 11. COM 12. MTR SPEED B 13. M

15、TR SPEED A MAIN PCB + B A MABUCHI MTR MECHA CHASSISPH TYPE (JST) SOL 1 2 3 4 5 1. LOAD OUT (+) 2. LOAD IN (+) 3. LOAD OUT 4. COM 5. LOAD IN LOADING PCB PH TYPE (JST) MTR + 1. Lch R / P HD PH CONNECTOR + + L R E HD + 2. Lch 3. Rch 4. Rch + 5. E 6. E+ CASSETTE MECHANISM CB2 CB1 CB3 LOADING PCB MAIN PC

16、B CB2 CB3 CB1 M38B57M6-143FP 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 mode V : 20V/divH : 5 sec/div DC range1 : 1 probe 0V Point w CH1 : Pin 10 of IC205 CH2 : OUT of IC103 V : 2V/div (CH1)V : 5V/div (CH2) H : 0.5 sec/divDC range1 : 1 probe CH 1 CH 2 * AC POWER ON * AC POWER OFF Point e (Pin 15 of C205) REC mode V : 2V/divH : 0.1 sec/div DC range1 : 1 probe 0V RadioFans.CN 收音机爱 好者资料库