C.Audio-RA3000-pwr-sch维修电路原理图.pdf

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1、A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMAIN.S02Drawn By: ON AMPLIFIERS WITH FLAT PACK (J162 K1058) MOSFETS FIT A 10pF =250V WORKING ACROSS THE GATE, DRAIN OF EACH K1058 MOSFET QUIESCENT VOLTAGE ADJUSTMENT THIS IS MEASURED ACROSS THE GATE DRIVE AT POINTS

2、A B TO GIVE 300mV +/- 10mV DIAGRAM SHOWS RA1000 OUTPUT STAGE. RA2000 AND RA3000 OUTPUT STAGES DIFFER IN THE NUMBER OF OUTPUT DEVICES PER RAIL. THE RA2000 USES 4 DEVICES PER RAIL AND THE RA3000 USES 6 DEVICES PER RAIL. ADDITIONAL OUTPUT DEVICES ARE CONFIGURED SIMILARLY WITH 560R GATE RESISTORS AS SHO

3、WN. D29 IN4004 D28 IN4004 R58 1K R30 1K D20 IN4004 D19 IN4004 R143 22R R144 22R LABEL LABEL LABEL LABEL LABEL LABEL LABEL LABEL R11 1K C22 220PF C31 OPT C23 C25 100UF C24 C29 Z6 Z5 C28 100UF C30 100NF VR1 1K VR3 470R Q15 BF422 Q14 BF423 Q12 BF423 Q19 BF423 Q18 BF423 Q17 BF422 Q16 BF422 Q13 BF422 Q11

4、 BF422 Z4 6V2 Z3 6V2 D6 1N4148 D5 1N4148 D4 1N4148 D3 1N4148 D2 1N4148 D1 1N4148 R60 OPT R59 39K R57 82K R56100R R55 680R R53 2K7 R52 330R R51 100R R49 100R R48 100R R47 100R R46 100R R45 100R R44 100R Q6 BC184L Q5 BC184L Q4 BF422 Q3 BF422 Q2 BF422 Q10 BF423 Q9 BF423 Q8 BC214L Q7 BC214L Q1 BF423 R43

5、 330R R42 220R R41 220R R40 1K5 R39 5K6 R38 220K R36 1K R35 100R R34 39K R33 100R R32 220K R31 100R R29 82K R28 100R R27 680R R25 2K7 R24 150R R127 560R R128 560R R115 560R R116 560R C42 100NF/250V C41 100NF/250V R72 10R/2.5W R146 10R/2.5W R73 10R/2.5W CHOKE1 15 TURNS R37 OPT C21 OPT C20 C17 100UF C

6、33 C34 OPT R50 OPT R71 47R C18 B A 100NF 25V / 16V 100UF/ 16V 100UF/ 100V 100NF/ 250V 100NF/ LMB 62 3RAMAIN 2 CHANNEL 1 AMPLIFIER HT- LT-1 HT+ LT+1 GND O/P1 GND1 AMP1 GATE RESISTORSR127 - R132 GATE RESISTORSR115 - R120 RadioFans.CN 收音机爱好者资料库 A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 S

7、heet of File:D:PROTELRANEWRAMAIN.S03Drawn By: DIAGRAM SHOWS RA1000 OUTPUT STAGE. RA2000 AND RA3000 OUTPUT STAGES DIFFER IN THE NUMBER OF OUTPUT DEVICES PER RAIL. THE RA2000 USES 4 DEVICES PER RAIL AND THE RA3000 USES 6 DEVICES PER RAIL. ADDITIONAL OUTPUT DEVICES ARE CONFIGURED SIMILARLY WITH 560R GA

8、TE RESISTORS AS SHOWN. QUIESCENT VOLTAGE ADJUSTMENT THIS IS MEASURED ACROSS THE GATE DRIVE AT POINTS A B TO GIVE 300mV +/- 10mV ON AMPLIFIERS WITH FLAT PACK (J162 K1058) MOSFETS FIT A 10pF =250V WORKING ACROSS THE GATE, DRAIN OF EACH K1058 MOSFET R105 47R D31 IN4004 D32 IN4004 R78 1K R108 1K D22 IN4

9、004 D21 IN4004 R142 22R R145 22R LABEL LABEL LABEL LABEL LABEL LABEL LABEL LABEL R88 1K C61 220PF C47 OPT C59 C56 100UF C60 C54 Z9 Z8 C55 100UF C50 100NF VR2 1K VR4 470R Q28 BF422 Q31 BF423 Q33 BF423 Q26 BF423 Q27 BF423 Q29 BF422 Q30 BF422 Q32 BF422 Q34 BF422 Z10 6V2 Z11 6V2 D14 1N4148 D13 1N4148 D1

10、6 1N4148 D15 1N4148 D18 1N4148 D17 1N4148 R76 OPT R77 39K R79 82K R80100R R81 680R R83 2K7 R84 330R R86 100R R87 100R R90 100R R91 100R R92 100R R93 100R R89 100R Q39 BC184L Q40 BC184L Q41 BF422 Q42 BF422 Q43 BF422 Q35 BF423 Q36 BF423 Q37 BC214L Q38 BC214L Q44 BF423 R106 330R R107 220R R94 220R R95

11、1K5 R96 5K6 R97 220K R98 1K R99 100R R100 39K R101 100R R102 220K R104 100R R109 82K R110 100R R111 680R R113 2K7 R114 150R R133 560R R134 560R R121 560R R122 560R C43 100NF/250V C44 100NF/250V R74 10R/2.5W R147 10R/2.5W R75 10R/2.5W CHOKE2 15 TURNS R103 OPT C62 OPT C63 C66 100UF/100V C65 100UF/100V

12、 C52 C51 OPT R85 OPT 100NF 25V / 16V 100UF/ 16V 100UF/ 100V 100NF/ 250V 100NF/ LMB 63 3RAMAIN 3 CHANNEL 2 AMPLIFIER HT- LT-2 HT+ LT+2 GND O/P2 GND2 AMP2 GATE RESISTORSR133 - R138 GATE RESISTORSR121 - R126 A B RadioFans.CN 收音机爱好者资料库 A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of Fi

13、le:D:PROTELRANEWRAMAIN.S01Drawn By: NOTE:- FOR AMPS WITH FLAT PACK MOSFETS MC33079 IC IS FITTED TO POSITION IC1 RA3000/1 R10, R23 6K8/1W RA2000/1 R10, R23 6K8/1W RA1000/1 R10, R23 4K7/1W LABEL LABEL LABEL LABEL LABEL LABEL LABEL VOL1 50K LIN VOL2 50K LIN 2 3 1 XLR4 2 3 1 XLR1 2 3 1 XLR3 2 3 1 XLR2 S

14、W2 3 2 1 411 IC1A MC33079 R11KR29K1 R31KR49K1 R5 10K R6 100K R7 1K R8 47K R9 100K R10 R1210K R13100K R1410K R151K R161K R179K1 R189K1 R19 10K R20 100K R211K R22 100K R23 5 6 7 IC1B MC33079 10 9 8 IC1C MC33079 C1 220PF C2 220PF C3 10PF C710PF C810PF C910PF C10 220PF C11 220PF C12 10PF C4 100UF/16V C6

15、 100UF/16V C13 100UF/16V C14 100UF/16V C15 100UF/16V Z1 18V Z2 18V C5 100UF/25V C16 100UF/25V JACK1 JACK2 RGND10R/2.5W SW1 COAX2SYMCOAX2SYM COAX2SYMCOAX2SYM COAX2SYMCOAX2SYM COAX1SYMCOAX1SYM LABEL LABEL COAX2SYM COAX2SYM COAX2SYM COAX2SYM 13 12 14 IC1D MC33079 SEE NOTE:- RA INPUT PCB AMP1 AMP2 HT- G

16、ND HT+ GND1 GND2 LT+ LEDBR REDYELL RED SCR SCR RED BLUE RED BLUE SCR GREENGREEN RED BLUE SCR BLUE RED SCR RED BLUE SCR GROUND LINK SWITCH BRIDGE/STEREO MODE SWITCH INPUT STAGE CIRUITRY 3 16 LMB RAMAIN 1 A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMAIN.S04Draw

17、n By: VOLTAGE FUSE1 SOFTSTART 100V 2A T 22R/23W 110V 2A T 22R/23W 220V 1.6A F 47R/23W 240V 1.6A F 47R/23W TRANSFORMER SECONDARY VOLTAGES QUOTED VOLTAGES ARE OFF LOAD AC (RMS) RA1000 RA2000 RA3000 RED 47 58 68 ORANGE 47 58 68 YELLOW 0 0 0 GREEN 52 63 73 BLUE 52 63 73 RA3000 C69, C70, C71, C72, C75, C

18、76, C77, C78 4700UF/110V RA2000 C69, C70, C71, C72, C75, C76, C77, C78 4700UF/110V RA1000 C69, C70, C75, C76 4700UF/110V C71, C72, C77, C78 NOT FITTED 9 LABEL 2 LABEL 5 LABEL 4 LABEL SOFTSTARTFUSE 1 LABEL LABEL LABEL LABEL LABEL LABEL LABEL FUSE4 FUSE3 FUSE2 FUSE1 C74 C73 C68 C67 C80 2200UF/16V C79

19、2200UF/16V C76 C75 C78 C77 C72 C71 C70 C69 DBR2 KBPC3504 DBR1 KBPC3504 D23-D26 IN4004 RTHERM 220R/1W THERM1 D33-D36 IN4004 TX IEC S1 FUSE RELAY3 C81 47UF/35V C82 47UF/35V RA POWER SUPPLY 3 LMB CORRECT CONNECTION WIRING DETAILS FOR SEE TRANSFORMER CHASSIS CON 5:1 STAR GND RLY3 (A) RLY3 (B) BLUE YELLO

20、W BLACK BROWN ORANGE SWITCH MOUNTED MAINS FRONT PANEL 24V DC FAN LT+1 LT-1 HT+ LT+ LT+2 LT-2 HT- BLUE GREEN ORANGE YELLOW RED BROWN GREY GREEN/YELLOW REDRED BLACK E NL 0V 220V 240V MAINS INPUT VOLTAGE SELECTOR. CONNECT REQUIRED TRANSFORMER VOLTAGE TAP. UNUSED VOLTAGE TAP 55C NORMALLY OPEN THERMAL SW

21、ITCH RA TRANSFORMER (4 OFF) (4 OFF) 330NF/ 250V 250V 330NF/ 250V 330NF/ 250V 330NF/ AC:1 AC:2 CT AC:3 AC:4 46 RAMAIN 4 A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMAIN.S05Drawn By: R154 100K DMOD IN4148 R70 18V 5 LABEL 3LABEL4LABEL R139 18k/2W 1 2 3 4 5 CON 5

22、 LED3 LED2 LED1 1 2 3 4 5 6 6PIN 1 2 3 4 5 6 6PIN D27 IN4004 R61 4K7 R62 100K R63 47K R64 47K R65 47K R66 47K R67 47K R68 SEE NOTE R69 24K D7 IN4004 D8IN4004 D9IN4004 D101N4148 D11 1N4148 Q23 BF422 Q22 BF422 Q20 BF422 Q21 BF423 R149 100K C38 100UF/16V C39 100UF/16V C37 680NF RMOD1 100K Q25 BF422 Z7

23、9V1 C40 100uF Q24 BF423 RELAY1RELAY2 D12 IN4004 Q46 BF422 R151 10K R152 10K R141 18K/1W Q45 2SA958 R150 120R R148 39K Z12 5V6 C45C46 THERM2 1 1 1 1 R140 8K2 LABEL LABEL LABEL D30 IN4004 2 LABEL 8 LABEL LMB 65 TO AC:1 TO LT+2 1RAMAIN 5 RA PROTECTION TO DISPLAY TO AC:4 YELLOW GREEN RED 250V 100NF/ 250

24、V 100NF/ INTERCONNECT FLEXISTRIP LT +VE CH2 GND LT +VE CH1 SWITCH CLOSED THERMAL 90C NORMALLY BLUEBLUE 6 WAY FLEXISTRIP INTERCONNECT LEDBR O/P1 O/P2 YELLOWGREYGREENGREEN CH2CH1 STATUS LED PCB POWER BRIDGE PROTECT RLY3 (A) RLY3 (B) NOTE: RA1000/1 RA2000/1 RA3000/1 R68= 330R/5W 1K/5W 1K/5W A B C D E F

25、 Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of File:D:PROTELRANEWNEWDISP.S01 Drawn By: RA4001 R1, R26 2K2/4W R7, R16 5K1 R27, R30 100K Z3, Z4 10V RA3001 R1, R26 3K3/4W R7, R16 6K8 R27, R30 (NOT FITTED) Z3, Z4 6V2 RA2001 R1, R26 3K3/4W R7, R16 8K2 R27, R30 (NOT FITTED) Z3, Z4 6V2 RA1001 R1, R2

26、6 2K2/4W R7, R16 13K R27, R30 (NOT FITTED Z3, Z4 7V5 R25 100K R24 100K R23 4K7/1W R19 56K R18 56K R17 1K R16 R14 510K R13 10K R12 100K R11 10K R26 C6 100NF D4 1N4148 Z2 18V/1.3W LED2 LED3 LED4 LED5 LED6 LED7 LED1 Q8 BF423 Q7 BF423 C8 470PF D6 1N4148 Z4 Q4 BF423 Q3 BF422 C5 1uF C4 100NF D3 1N4148 D1

27、1N4148 C1 100NF C2 1uF Q1 BF422 Q2 BF423 Z3 D5 1N4148 C7 470PF Q5 BF423 Q6 BF423 LED8 LED14 LED13 LED12 LED11 LED10 LED9 Z1 18V/1.3W D2 1N4148 C3 100NF R1 R2 10K R3 100K R4 10K R5 510K R7 R8 1K R9 56K R10 56K R20 4K7/1W R21 100K R22 100K 1 2 3 4 5 C10 47UF/35V C9 47UF/35V Z9 9v1 Z10 6v8 Z11 4v7 Z12

28、2V7 SIG 7 8 1 2 3 4 6 9 5 IC2 LB1443N SIG 7 8 1 2 3 4 6 9 5 IC3 LB1443N Z5 9v1 Z6 8 Z7 4v7 Z8 2V7 Z13 11V Z14 11V Q9 BC214L Q10 BC214L R31 47R R28 47K R29 47K R32 47R Q11 BC214L Q12 BC214L R27 R30 * * * * * * ONLY FIT ON RA4001 ON RA4001 ONLY FIT TO CON: 5 LMB 66 3RA DISPLAY RA DISPLAY CARD SIGNAL P

29、RESENT -40dB -20dB -12dB -7dB -4dB 0dB CLIP GREEN RED RED GREEN CLIP 0dB -4dB -7dB -12dB -20dB -40dB SIGNAL PRESENT LT +VE CH1 CH1 O/P GND CH2 O/P LT +VE CH2 YELLOW YELLOW A B C D E F Title NumberRevisionSize A3 Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRADISP.S06Drawn By: RA3000 R1, R26 3K3/4W R7,

30、 R16 6K8 Z3, Z4 6V2 RA2000 R1, R26 3K3/4W R7, R16 8K2 Z3, Z4 6V2 RA1000 R1, R26 2K2/4W R7, R16 13K C9 47UF/35V C10 47UF/35V 1 2 3 4 5 R22 100K R21 100K R20 4K7/1W R10 56K R9 56K R8 1K R7 R6 1K R5 510K R4 10K R3 100K R2 10K SIG 7 1 P0 6 P1 5 P2 4 P3 3 P4 2 8 IC3 U257 R1 C3 100NF D2 1N4148 Z1 20V/1.3W

31、 LED9 LED10 LED11 LED12 LED13 LED14 LED8 Q6 BF423 Q5 BF423 C7 470PF D5 1N4148 Z3 Q2 BF423 Q1 BF422 C2 470NF C1 100NF D1 1N4148 D3 1N4148 C4 100NF C5 470NF Q3 BF422 Q4 BF423 Z4 D6 1N4148C8 470PF Q7 BF423 Q8 BF423 LED1 LED7 LED6 LED5 LED4 LED3 LED2 Z2 20V/1.3W D4 1N4148 C6 100NF R26 SIG 7 1 P0 6 P1 5

32、P2 4 P3 3 P4 2 8 IC2 U257 R11 10K R12 100K R13 10K R14 510K R15 1K R16 R17 1K R18 56K R19 56K R23 4K7/1W R24 100K R25 100K YELLOWYELLOW LT +VE CH2 CH2 O/P GND CH1 O/P LT +VE CH1 SIGNAL PRESENT -40dB -20dB -12dB -7dB -4dB 0dB CLIP GREEN RED RED GREEN CLIP 0dB -4dB -7dB -12dB -20dB -40dB SIGNAL PRESEN

33、T RA DISPLAY CARD RA DISPLAY3 66 LMB TO CON: 5 1234 Title NumberRevisionSize A4 Date:22-Jul-1999Sheet of File:D:PROTELRANEWREENTRY.S01Drawn By: CON CONCON CON CON CON D17 10v D16 10v TR2 BC214L TR1 BC184L D4 IN4148 D3 IN4148 D2 IN4004 D1 In4004 C1 6n8 C3 6n8 R87 1k R8 5k6 R7 1k R6 82k R5 8k2 R4 1k R

34、3 5k6 R2 82k R1 8k2 PCB1042/P1 ION PCBRE-ENTRANT PROTECT 1 1 L BASHAM Protection System The protection system is based around Q20-Q25. Under normal conditions Q20 Q23 will be off. At turn-on C40 will charge through R65 towards the +LT supply rail. The voltage is fed to the base of Q25 via D11. When

35、the voltage across C40 reaches approximately 10V Q25 will turn on and thus turn on Q24. Resistor/diode network R67 & D38 connected between Q24 collector and Q25 base provides positive feedback in order to make the turn-on/turn-off of Q24 more defined. The collector of Q24 is connected via R68 R150 &

36、 Q45 to the coils of relays RLY1-3. Transistors Q20 and Q21 are connected in such a way that a voltage of -650mV applied to the emitter of Q20 will turn on Q20 and hence Q21. This will rapidly discharge C40 and hence turn off Q25 and Q24 thus opening the output relays. Similarly Q23 is connected suc

37、h that a base voltage of +650mV will turn it, and hence Q22, on with the same resultant opening of the output relays. The output of each channel is fed via resistors R63 and R64 into C38-C39 and then via D9 and D10 to Q23 base and Q20 emitter respectively. The combination of C38-C39 with R63 and R64

38、 forms a low-pass filter, and so at signal frequencies C38-C39 will have no voltage across it. In the event of a DC offset appearing at the output, however, C38-C39 will charge to a DC voltage, turning on Q23 & Q22 or Q20 & Q21 depending upon the polarity, and hence opening the output relays. The Ne

39、twork consisting of R62, R61 and C37 provide the rapid turn-off feature of the protection system. R61 is connected through the 90 degree thermal switch to D37 and D7, which are connected to the secondaries of the mains transformer. The union of D37 and D7 will, therefore, show a full-wave rectified

40、version of the secondary voltage. This is averaged by C37 to a negative DC voltage, reverse biasing D8 and, therefore, having no effect on the protection system. Should one of the thermal switches open, or the power be turned off, C37 will be rapidly charged towards the +LT rail via R61, forward biasing D8, turning Q23 on and opening the output relays. If there is no rapid turn off, suspect R62 (100k) this may be open circuit. It is worth noting that failure of this resistor will render the thermal shutdown useless.