Yamaha-RXV-795-A-Schematic电路原理图.pdf

《Yamaha-RXV-795-A-Schematic电路原理图.pdf》由会员分享，可在线阅读，更多相关《Yamaha-RXV-795-A-Schematic电路原理图.pdf（9页珍藏版）》请在收音机爱好者资料库上搜索。

1、RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJKL 1 2 3 4 5 6 7 8 DSP * All voltage are measured with a 10M/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 sub

2、ject to change without notice. I SCHEMATIC DIAGRAM (DSP) E-65/J-55 Pointt (Pin13 of IC3) V : 2V/divH : 50 nsec/div DC range1 : 1 probe Point y (Pin13 of IC14) V : 2V/divH : 50 nsec/div DC range1 : 1 probe IC5 : M5M51288BKJ-20L RAM LINE INPUT BUFFER LINE ADDRESS DECODER I/O DATA CONTROL CIRCUIT DATA

3、I/O ADDRESS INPUT A0 A1 A2 A3 A4 A5 A6 A7 A8 S1 S2 A9 A10 A11 A12 A13 A14 A15 A16 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 18512MEMORY ARRAY 131072X8bit 512X2048 Vcc(5V) GND(0V) COLUMN I/O CIRCUIT COLUMN ADDRESS DECODER COLUMN INPUT BUFFER 16 256 2048 CHIP SELECT CIRCUIT WRITE ENABLE CONTROL INPUT OUTPUT ENA

4、BLE CONTROL INPUT W OE IC2 : HD74HC02FPEL Quad 2 Input NOR Other ICs G IC3: YM3436DK See page E-27/J-23 G IC4: YSS918-F See page E-28/J-24 G IC14: LC87F5164 See page E-31/J-27 IC1 : NJM2904M IC811, 13 : PC4570G2 Dual OP Amp IC7 : AK4320 1 bit D/A Converter IC6 : AK4526 A/D REAR L FRONT L DIGITAL IN

5、DIGITAL IN MAIN L MAIN L CENTER 0 4.9 0 0 4.9 4.9 0 0 4.9 0 4.9 4.9 0 4.9 4.9 4.9 4.9 4.9 4.9 6 3.3 2.4 3.1 2.4 2.4 2.6 0 2.4 0.9 4.7 0.1 0 3.1 0 0 0 0 0 0 0 0 04.8 4.9 0 00.5 00.20.2 0.50 4.9 4.9 0 0 2.4 2.4 4.9 2.3 0 4.9 0 0 0 4.9 0 2.4 2.4 2.4 4.9 0 4.9 0 0 0 0 4.9 0 2.3 0 4.8 4.9 4.8 2.4 0 0 4.8

6、 0 4.9 0 0 0 0 0 00 0 4.8 4.8 2.4 4.8 2.4 2.42.4 00 2.42.4 00 2.42.4 4.8 0 -10.9 4.7 0 4.7 0.2 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 0 -10.9 0 00.6 0 0 0.6 0 0 11.5 0 0 -11.5 0 0 0 11.5 0 0 0 11.5 0 0 0 -11.5 0 0 11.5 2.4 2.4 2.4 2.4 2.4 2.4 -11.5 -11.5 2.4

7、2.4 2.4 2.4 2.4 2.4 11.5 0 -11.5 0 0 02.4 02.4 2.52.4 2.4 2.4 02.4 2.42.4 2.42.4 02.4 02.4 00 0.5 4.7 0 3.1 2.4 2.4 0 2.4 2.4 0 2.4 2.4 2.4 2.4 2.4 2.4 2.4 0.1 0.1 0.1 0 4.8 4.80 0.9 0.9 0 0 0.1 0.1 0.1 0.1 4.8 2.4 4.9 0 4.9 4.9 2.4 4.9 2.4 0 2.4 2.4 0 0 3.1 0 0 0 2.4 0 3.1 1.5 0 3.1 0 2.4 4.8 4.7 2

8、.4 0.9 0.1 0 0.9 0.9 0 0 0.1 0 0 4.9 4.9 0 2.3 2.6 4.9 0 4.9 4.9 4.9 0 4.9 4.9 0 4.7 0 4.9 0 4.9 0 0 0 0 4.9 4.9 4.9 0 4.9 0 0 0 0 0 0 4.9 2.4 2.3 2.3 4.9 2.6 2.5 2.4 2.4 2.4 2.4 4.9 4.9 2.2 2.2 0 0 0 0 5 0 00 0 0 0 0 0 0 0 0 4.9 4.9 4.9 2.2 0.1 DSP + DIGITAL PRO-LOGIC DTS DECODER DIR RAM DAC P-E66/

9、J56 D-1 P-E66/J56 G-8 P-E69/J59 F-2 5 3 8 2 4 1 6 5 7 13 11 14 12 10 9 8 7 2 3 1 6 4 7 4 6 5 7 1 1 83 2 42 3 5 6 8 IC3 IC4 IC14 RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJK 1 2 3 4 5 6 7 8 I SCHEMATIC DIAGRAM (INPUT) E-66/J-56 * All voltage are measured with a 10M/DC electric volt meter. * Components

10、 having special characteristics are marked Zand must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is subject to change without notice. INPUT (This waveform is not available by pushing the power switch ON and OFF.) Disconnect the power cord fro

11、m the AC outlet. With the POWER ON, dis- connect the A/C power cord. Reconnect the A/C power cord and the above wave- forms will start. 0V Pointe (Pin3 of IC21) V : 2V/divH : 50 nsec/div DC range1 : 1 probe Pointr CH1 : Pin1 of IC21 CH2 : Pin29 of IC21 H : 0.5 sec/divDC range1 : 1 probe V : 2V/div (

12、CH1) V : 2V/div (CH2) FRONT L REAR R MAIN L MAIN L CENTER 43 4 00 0 0 4.9 11.3 -11.5 11.6 11.6 0 0 0 0 0 -11.5 11.6 11.6 0 0 0 0 0 -11.5 4.7 2.0 4.8 4.9 4.9 0 0 4.9 0 0 4.9 4.9 0 4.8 0 4.9 0 0 1.2 0 0.3 0 0.2 0.7 -11.4 0 0 11.2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11.6 0 0 0 0 0

13、 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 -22.2 0.1 0.1 0.1 0 0 0 0 0.3 0.3 0 21.8 0 00 0 0 0 00 0 21.8000 0 -22.2 00 0 0 0 -22.2 0 -11.5 0 -11.1 0 4.9 0 0 4.9 0 0.3 0 4.9 0 0 4.9 0 4.9 0.1 4.9 4.9 4.9 0 1.2 0.3 1.4 0 4.9 4.5 2.2 4.7 4.9 4.9 4.7 4.9 4.9 0 0 0 0 4.9 4.9 0 4.9 4.9

14、 0 4.9 4.9 4.9 0 0 0 0 0 4.9 4.9 0 0 4.9 4.9 4.5 4.9 4.7 4.9 11.6 11.6 0 0 0 0 0 PHONO MM EQ AMP INPUT SELECTOR TAPE MONITOR P-E69/J59 TO VIDEO(1) C-2 P-E67/J67 D-8 P-E65/J55 B-8 P-E68/J58 H-2 P-E71/J61 : NOT USED : USED CIRCUIT CHANGES BY MARKET. A-5 P-E69/J59 A-5 P-E69/J59 I-3 P-E65/J55 J-4 P-E72/

15、J62 (J,U,C,A,L,R,T models) P-E73 (B,G models) H-5 8 1 3 2 6 5 4 7 5 6 8 7 2 3 4 1 1 7 4 5 6 8 3 2 2 3 6 5 7 8 4 1 5 3 2 1 8 6 4 7 3 6 5 4 7 2 1 8 IC21 RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJKL 1 2 3 4 5 6 7 8 INPUT & VIDEO I SCHEMATIC DIAGRAM (INPUT & VIDEO) * All voltage are measured with a 10M/

16、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 subject to change without notice. E-67/J-57 IC17 : LC78211 Analog Function Switch IC11 : NJM2068MD IC12, 2

17、0 : PC4570G2 IC13, 15, 16 : M5220FP Dual OP Amp IC18 : LC78213 Analog Function Switch IC19 : LC78212 Analog Function Switch IC402404, 407, 408 : LA7956 Video Switch IC401 : TC4053BP Triple 2-Channel Analog Multiplexers/ Demultiplexers Other ICs G IC21: HD6433397A97F See page E-36/J-30 G IC406: LC747

18、81-9626 See page E-35/J-29 IC405 : PD4066BC Quad Analog Switch/Multiplexer 16 VDD LOGIC LEVEL CONVERTER 12OX 7 VEE 6INH OUT C IN 13IXOUT C IN 2OY OUT C IN 1IYOUT C IN 5OZ OUT C IN 3IZOUT C IN 4Z-COMMON 15 14X-COMMON Y-COMMON 9C 10B 11A 8 VSS REAR L CENTER 5.0 5.7 5.6 5.611.1 0 0 11.1 0 0 5.0 0 0.1 1

19、.1 1.8 0.7 0 0 8.8 8.8 9.3 9.3 9.8 0 0 9.8 0 0.5 0.5 1.1 2.72.72.7 3.4 0.1 0.3 11.1 1.5 2.1 2.5 2.5 0.5 0.5 0 5.0 0 4.4 4.9 1.9 1.1 4.3 4.3 5.0 1.1 000 2.5 0 11.1 3.8 3.8 3.8 5.3 3.8 3.8 3.8 5.3 0 11.5 11.3 11.1 0 11.5 11.3 0 0 11.1 11.3 3.8 3.8 11.1 3.8 0 3.8 11.5 11.3 5.6 2.4 05.0 5.0 5.0 0 5.0 0

20、2.0 5.0 1.1 0 1.1 2.5 0 0.1 2.4 2.4 4.9 4.9 0 5.0 11.1 3.8 0 3.8 11.5 11.3 5.7 11.1 3.8 0 3.8 11.5 11.3 5.7 1.11.5 2.2 1.0 0 0.5 0.5 5.0 5.0 0 0 0 11.1 5.6 5.6 11.1 11.5 0 5.0 11.1 5.7 0 11.1 5.6 0.7 0.7 0.7 0 23.8 23.8 0.7 0.7 1.3 AC12.6 SUB POWER SUPPLY S-VIDEO AMP & SELECTOR SUPERIMPOSE REGULATOR

21、 SYNC SIGNAL DETECTOR SPEAKER RELAY DRIVE P-E66/J56 D-8 P-E69/J59 I-2 P-E70/J60 I-6 TO MAIN (1) TO MAIN (5) P-E68/J58 A-1 P-E71/J61 TO MAIN (2) G-2 P-E70/J60 TO MAIN (1) I-5 CIRCUIT CHANGES BY MARKET. : NOT USED : USED IC406 RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJK 1 2 3 4 5 6 7 8 I SCHEMATIC DIA

22、GRAM (OPERATION) * All voltage are measured with a 10M/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 subject to change without notice. E-68/J-58 OPERATI

23、ON IC102 : LC75710NE FL Display Driver Other IC G IC102 : LC75712E See page E-35 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -29.6 0 0 2.3 2.4 4.7 4.9 0 4.9 0 0 4.9 4.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -28.0 -27.8 -27.8 -29.6 -22.5 -28.8 4.7 -28.1 4.7 -27.8 -28.1 4.74.7 -27.8 0 -23.6 -28.9 -28.9 -1

24、3.3 -13.3 0 5.65.68.84.9 4.9 5.6 0.6 0.6 0 4.4 4.9 -11.4 8.8 8.1 5.76.3 4.8 0 0 0 0 0 8.8 4.9 4.9 4.9 -22.3 -22.3 -23.6 -28.8 -28.1 -28.0 -28.0 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 -27.9 FULL MUTE DRIVE DISPLAY DRIVE SYSTEM CONTROL RESET CIRCUIT CHANGES BY MARKET.

25、P-E66/J56 H-8 P-E67/J57 I-6 P-E70/J60 I-4 : NOT USED RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJKL 1 2 3 4 5 6 7 8 * All voltage are measured with a 10M/DC electric volt meter. * Components having special characteristics are marked Zand must be replaced with parts having specifications equal to those

26、 originally installed. * Schematic diagram is subject to change without notice. E-69/J-59 I SCHEMATIC DIAGRAM (OPERATION) OPERATION IC202 : PC4570HA Dual OP-Amp IC251253, 257, 258 : PC4570G2 Dual OP-Amp IC201 : NJM2068LD Dual OP Amp IN1 2 +IN1 3 VCC 4 +IN2 5 IN2 6 OUT2 7 +VCC 8 OUT1 1 + + VO1 2 Vm1

27、3 +Vm1 4 VEE 5 +Vm2 6 Vm2 7 VO2 8 VCC 9 VCC 1 1 + + 2 IC254 : LB1641 Motor Driver IC255, 256 : TC9299P Electric Controlled Volume IC351 : TC74HCU04AP Hex Inverters IC352 : HD74HC00P Quadruple 2-input Positive NAND Gates IC353 : HD74HC153P Dual 4 to 1 Data Selectors REAR L MAIN DIGITAL IN CENTER 0.3

28、0 0 0 4.8 0 4.3 4.8 0 4.3 4.8 0 11.3 0 0 0 0 0 -11.3 11.3 0 0 0 11.3 0 0 0 -11.3 0 0 0 11.3 11.5 0 0 0 -11.4 0 0 0 11.5 0 0 0 0 0 0 -11.4 0 0 0 -11.3 0 0 0 -11.3 11.3 0 0 0 0 0 0 -11.3 0 0 0 0 4.8 00 4.34.8 0 0 00.3 4.8 4.8 0 4.8 4.8 0 4.3 00 0 4.8 3.1 2.5 4.8 4.8 4.8 0 0 0 0 0 0 4.9 4.3 4.3 4.8 0 4

29、.8 0 0 0 0 0 0 0 0 -11.3 0 0 0 0 0 0 0 11.3 0 0 0 0 0 0 0 11.3 0 0 11.3 0 0 0 0 11.3 0 0.1 2.0 0.1 0 4.8 0.5 0.7 1.20 4.5 4.5 10.4 10.4 0.7 0.5 SPEAKER SETTING CONTROL SPEAKER LEVEL CONTROL MOTOR DRIVE VOLUME AMP DIGITAL SELECTOR CIRCUIT CHANGES BY MARKET. P-E66/J56 E-1 P-E67/J57 to VIDEO (1) G-8 P-

30、E65/J55 B-1 P-E70/J60 A-5 P-E71/J61 A-4 P-E66/J56 G-1 P-E66/J56 C-8 : NOT USED 3 2 8 1 6 5 4 7 1 83 6 5 4 7 6 5 4 7 2 1 8 3 2 6 4 7 5 6 2 3 8 1 2 3 8 1 4 7 5 RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJK 1 2 3 4 5 6 7 8 * All voltage are measured with a 10M/DC electric volt meter. * Components having

31、special characteristics are marked Zand must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is subject to change without notice. E-70/J-60 I SCHEMATIC DIAGRAM (MAIN) Each voltage given here represents that in the top side of IMPEDANCE SELECTOR,

32、but the one in the parentheses ( ) is that in the bottom side. MAIN MAIN L CENTER -48.9 (-40.5) 48.8 (40.5) 0 1.2 0.7 0.6 0 0.7 24.1 0 -42.2 -29.6 -30.2 0 0 -48.1 0.6 -0.4 -1.0 0.9 0.4 0.9 48.8 (40.5) 0 0.4 48.8 (40.5) 0 -0.4 -48.9 (-40.5) -0.4 -1.0 -48.9 (-40.5) 0 48.6 48.8 (40.5) 0 0 48.6 -48.1 -4

33、8.6 -1.0 13.6 0 -48.8 0 0 -48.0 0.6 -0.4 -1.0 1.0 0.4 1.0 48.8 (40.5) 0 0.4 48.8 (40.5) -0.5 -1.0 -48.9 (-40.5) 0 -0.5 -48.9 (-40.5) 0 0 48.4 -48.0 -48.5 -1.0 -48.8 0 0 -11.4 0 0 -11.4 0 0 -11.4 0 0-11.4 0 -48.1 0.6 -0.4 -1.0 1.0 0.4 1.0 48.8 (40.5) 0 0.4 48.8 (40.5) -0.5 -1.0 -48.9 (-40.5) 0 -0.5 -

34、48.9 (-40.5) 0 0 48.5 -48.1 -48.6 -1.0 -48.8 0 0 0-11.4 SPEAKER RELAY DRIVE CENTER POWER AMP MAIN R POWER AMP MAIN L POWER AMP MUTING MUTING MUTING B POWER SUPPLY CIRCUIT CHANGES BY MARKET. P-E71/J61 G-5 P-E71/J61 G-5 P-E67/J57 TO VIDEO (2) I-5 P-E71/J61 G-5 P-E68/J58 B-1 P-E69/J59 E-5 P-E67/J57 H-7

35、 : NOT USED RX-V795a/RDS/HTR-5170/DSP-R795a ABCDEFGHIJKL 1 2 3 4 5 6 7 8 MAIN * All voltage are measured with a 10M/DC electric volt meter. * Components having special characteristics are marked Zand must be replaced with parts having specifications equal to those originally installed. * Schematic d

36、iagram is subject to change without notice. E-71/J-61 I SCHEMATIC DIAGRAM (MAIN) Each voltage given here represents that in the top side of IMPEDANCE SELECTOR, but the one in the parentheses ( ) is that in the bottom side. REAR L REAR L MAIN CENTER -32.6 31.8 -19.9 19.0 010.5 0 0 -48.4 0.6 0.4 -1.0

37、0.9 0.4 0.9 48.8 (40.5) 0 0.4 48.8 (40.5) -0.5 -1.0 -48.9 (-40.5) 0 0 0 -0.5 -48.9 (-40.5) 0 0 48.4 -48.4 -48.9 -1.0 -49.1 0 0 -11.4 0 -48.4 0.6 -48.4 -1.0 -48.8 -0.4 -1.0 -48.9 (-40.5) 0.4 0.9 48.8 (40.5) 0 0 0 48.4 0.4 48.8 (40.5) 31.924.0 24.6 -24.9 -16.5 -8.2 0 0 5.00.5 0 12.119.0 0 12.019.0 0 -

38、11.7-19.9 16.4 8.2 0 24.4 24.4 0 0 24.0 0 0 24.0 24.0 0 0 0 -0.4 -48.9 (-40.5) -1.0 0.9 -0.4 -49.1 0 0 0 -11.4 -11.4 0 0 AC75.8 AC51.6 AC62.6 AC31.6 AC9.7 AC6.5 REAR L POWER AMP REAR R POWER AMP REGULATOR MUTING MUTING MUTING CIRCUIT CHANGES BY MARKET. P-E71/J61 G-6 P-E71/J61 G-7 P-E70/J60 I-4 P-E66

39、/J56 H-1 P-E69/J59 E-6 P-E70/J60 I-4 P-E67/J57 H-5 P-E70/J60 I-7 : NOT USED RX-V795a/HTR-5170/DSP-R795a ABCDEFGHIJK 1 2 3 4 5 6 7 8 I SCHEMATIC DIAGRAM (TUNER) E-72/J-62 Each voltage given here represents that in the FM (98. 1MHz, STEREO) reception mode but the one in the parentheses ( ) is that in

40、the AM (1080kHz, MANL) reception mode. * All voltage are measured with a 10M/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 subject to change without not

41、ice. TUNER GPK1 : ENV-172C8G1R (V2909100) U, C, R, T modelsGPK1 : ENV-172A4G1 (V2716700) A, L modelsGPK1 : ENV-142C2G1R (V2909000) J model IC1 : LA1266 AM/FM IF IC2 : LC72131 PLL Controller IC3 : LA3401 MPX V : 2V/divH : 0.1sec/div 2VSAMPLE 0.1us Point1 (Pin22 of IC2) DC range1 : 1 probe 0V FM FM AM

42、 AM 10.4 (0) 10.5 (11.5) 0.1 (10.6) 5.1 (5.0) (4.4) (0) 5.1 (5.2) 7.7 (7.6) 2.4(1.1) 2.4 (1.1) 2.4 (1.1) 0 (0) 11.0 (11.1) 11.0 (11.1) 11.0 (11.1) 0 (0) 3.9(3.7) 2.3 (2.2) 0 (2.1) 3.0 (2.8) 3.4(2.1) 3.9(3.5) 3.9(3.5) (1.9) (3.5) 5.011.4 (11.5) 5.7 (5.7) 5.7 (5.7) 0 (0) 2.4 (0) 4.9(5.0) 0(2.5) (0)2.4

43、 4.9 (5.0) (1.0) 1.0 (1.0) 1.0 (5.0)4.5 (0)0 (0)0 0.1 10.6 (0)0 (0)0 (0.2)11.4 (0)0 (0)0 (0)0 (0)0 (2.5) (2.5)2.4 0 (11.5) (11.5)11.4 11.4 (0.2) (1.5) 3.9 0 (10.5) 1.5 2.4(1.1) (2.8)0 (2.2) 2.6 (2.0) 1.5 1.5 11.0 2.4 (11.1) 3.0 (2.8) (2.1) 3.1(3.1) 3.1(3.1) 3.1(3.1) 3.1(3.1) 3.0(3.0) 3.1(3.1) 3.1(3.

44、1) 3.0(3.0) 3.1(3.1) 0 (6.9) 11.1 (11.2) 3.4 (3.6) 2.8(7.0) 2.8(5.2) 2.8(5.2) 2.8 (9.1) 2.8 (2.8) 0(0) 4.9 (0) 4.9(5.0) 0(0) 02.8 (9.1) 0 (0) 2.8 (9.1) 4.9 (4.9) 0(0) 0 (0) 4.4 (5.2) 1 2.5 MONAURAL DISTORTION ADJ. SIGNAL METER ADJ. DISCRIMINATOR BALANCE ADJ. SEPARATION ADJ. (9.4) 9.3 0(0) AM SENSITI

45、VITY 87.5MHz 98.0MHz 108.0MHz 1.9V 4.5V 7.8V 531KHz 1080KHz 1611KHz 1.3V 5.0V 7.3V AM FM VT (EX only) FM (J only) AM 7.3V 5.0V 1.3V 1611KHz 1080KHz 531KHz 8.1V 4.1V 1.6V 90.0MHz 83.0MHz 76.0MHz REGULATOR PLL MPXAM/FM IF CIRCUIT CHANGES BY MARKET. bottom view TO INPUT (1) E-8 P-E66/J56 : NOT USED : U

46、SED RX-V795aRDS ABCDEFGHIJKL 1 2 3 4 5 6 7 8 TUNER E-73 I SCHEMATIC DIAGRAM (TUNER) Each voltage given here represents that in the FM (98. 1MHz, STEREO) reception mode but the one in the parentheses ( ) is that in the AM (1080kHz, MANL) reception mode. IC4 : LC72720N RDS Decoder & Controller GPK1 :

47、ENV-172A4G1 (V2716700) * All voltage are measured with a 10M/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 subject to change without notice. IC1 : LA126

48、6 AM/FM IF IC2 : LC72131 PLL Controller IC3 : LA3401 MPX SAMPLE 50us2V2V V : 2V/divH : 50nsec/div Point1 (Pin22 of IC2) DC range1 : 1 probe 0V SAMPLE 0.1us2V V : 2V/divH : 0.1sec/div Point2 (Pin12 of IC4) DC range1 : 1 probe 0V AM FM AM FM (0)0 1.5 (2.0) 1.5 2.7(2.3) 0(2.9) (1.1) 2.4 1.5(1.9) (10.6)

49、 0 (3.5) 3.9 (3.5) 3.9 (2.2) 3.1 11.2 SIGNAL METER ADJ. (6.9) 0 3.1(3.1) 5.1(5.1) 3.1(3.1) 3.1(3.1) 5.1 (5.1) 3.1(3.1) 3.2(3.2) 3.1(3.1) 3.1(3.1) 0 0.5 (4.5) (0) (0) 4.9 (0)0 (2.8)2.8 (9.2)2.8 (5.5)2.8 (5.5)2.8 (7.3)2.8 (2.0)(11.3) 3.4 (1.5) (9.2) 2.8 (0) 0 (2.1) 2.5 (2.8) 3.1 (11.2) 11.0 2.6 3.1 (2.8) (2.2) (2.3)2.3 (3.7)3.8 (9.2) 2.8 (0) 0 (11.2) (0)0 (11.2)11.0 (11.2)11.1 (11.2) 2.4 11.1 (0)0 2.4 (1.1) (1.1) 2.4 (1.1) 2.4 (2.4)2.5(2.5) (0)0 (0)0 (0)0 (0)0 (0)0 (0.2)11.5 (0)0 (10.6)0.1 (0)0 4.1(5.1) (1.0)1.1 (1.0)1.1 (4.9) 4.9 2.4(0) (2.4) 0 (4.5) 0.5 (2.4) 0 (0)