CAudio-RA2000-pwr-sch维修电路原理图.pdf

《CAudio-RA2000-pwr-sch维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《CAudio-RA2000-pwr-sch维修电路原理图.pdf（9页珍藏版）》请在收音机爱好者资料库上搜索。

1、ABCDEFTitleNumberRevisionSizeA3Date: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 A B TO GI

2、VE 300mV +/- 10mVDIAGRAM 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. ADDITIONALOUTPUT DEVICES ARECONFIGURED SIMILARLY WITH 560R GATE RESISTORS AS SHOWN.D29IN4004

3、D28IN4004R581KR301KD20IN4004D19IN4004R14322RR14422RLABELLABELLABELLABELLABELLABELLABELLABELR111KC22220PFC31OPTC23C25100UFC24C29Z6Z5C28100UFC30100NFVR11KVR3470RQ15BF422Q14BF423Q12BF423Q19BF423Q18BF423Q17BF422Q16BF422Q13BF422Q11BF422Z46V2Z36V2D61N4148D51N4148D41N4148D31N4148D21N4148D11N4148R60OPTR5939

4、KR5782KR56100RR55680RR532K7R52330RR51100RR49100RR48100RR47100RR46100RR45100RR44100RQ6BC184LQ5BC184LQ4BF422Q3BF422Q2BF422Q10BF423Q9BF423Q8BC214LQ7BC214LQ1BF423R43330RR42220RR41220RR401K5R395K6R38220KR361KR35100RR3439KR33100RR32220KR31100RR2982KR28100RR27680RR252K7R24150RR127560RR128560RR115560RR11656

5、0RC42100NF/250VC41100NF/250VR7210R/2.5WR14610R/2.5WR7310R/2.5WCHOKE115 TURNSR37OPTC21OPTC20C17100UFC33C34OPTR50OPTR7147RC18BA100NF25V/16V100UF/16V100UF/100V100NF/250V100NF/LMB623RAMAIN 2CHANNEL 1 AMPLIFIERHT-LT-1HT+LT+1GNDO/P1GND1AMP1GATE RESISTORSR127 - R132GATE RESISTORSR115 - R120RadioFans.CN 收音机

6、爱 好者资料库ABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet 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. ADDITIONA

7、LOUTPUT DEVICES ARECONFIGURED SIMILARLY WITH 560R GATE 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 MOSFETR1

8、0547RD31IN4004D32IN4004R781KR1081KD22IN4004D21IN4004R14222RR14522RLABELLABELLABELLABELLABELLABELLABELLABELR881KC61220PFC47OPTC59C56100UFC60C54Z9Z8C55100UFC50100NFVR21KVR4470RQ28BF422Q31BF423Q33BF423Q26BF423Q27BF423Q29BF422Q30BF422Q32BF422Q34BF422Z106V2Z116V2D141N4148D131N4148D161N4148D151N4148D181N4

9、148D171N4148R76OPTR7739KR7982KR80100RR81680RR832K7R84330RR86100RR87100RR90100RR91100RR92100RR93100RR89100RQ39BC184LQ40BC184LQ41BF422Q42BF422Q43BF422Q35BF423Q36BF423Q37BC214LQ38BC214LQ44BF423R106330RR107220RR94220RR951K5R965K6R97220KR981KR99100RR10039KR101100RR102220KR104100RR10982KR110100RR111680RR1

10、132K7R114150RR133560RR134560RR121560RR122560RC43100NF/250VC44100NF/250VR7410R/2.5WR14710R/2.5WR7510R/2.5WCHOKE215 TURNSR103OPTC62OPTC63C66100UF/100VC65100UF/100VC52C51OPTR85OPT100NF25V/16V100UF/16V100UF/100V100NF/250V100NF/LMB633RAMAIN 3CHANNEL 2 AMPLIFIERHT-LT-2HT+LT+2GNDO/P2GND2AMP2GATE RESISTORSR

11、133 - R138GATE RESISTORSR121 - R126ABRadioFans.CN 收音机爱 好者资料库ABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMAIN.S01Drawn By: NOTE:- FOR AMPS WITH FLAT PACK MOSFETS MC33079 IC IS FITTED TO POSITION IC1RA3000/1 R10, R23 6K8/1WRA2000/1 R10, R23 6K8/1WRA1000/1 R10, R23 4K7/1

12、WLABELLABELLABELLABELLABELLABELLABELVOL150K LINVOL250K LIN231XLR4231XLR1231XLR3231XLR2SW2321411IC1AMC33079R11KR29K1R31KR49K1R510KR6100KR71KR847KR9100KR10R1210KR13100KR1410KR151KR161KR179K1R189K1R1910KR20100KR211KR22100KR23567IC1BMC330791098IC1CMC33079C1220PFC2220PFC310PFC710PFC810PFC910PFC10220PFC11

13、220PFC1210PFC4100UF/16VC6100UF/16VC13100UF/16VC14100UF/16VC15100UF/16VZ118VZ218VC5100UF/25VC16100UF/25VJACK1JACK2RGND10R/2.5WSW1COAX2SYMCOAX2SYMCOAX2SYMCOAX2SYMCOAX2SYMCOAX2SYMCOAX1SYMCOAX1SYMLABELLABELCOAX2SYMCOAX2SYMCOAX2SYMCOAX2SYM131214IC1DMC33079SEE NOTE:-RA INPUT PCBAMP1AMP2HT-GNDHT+GND1GND2LT

14、+LEDBRREDYELLREDSCRSCRREDBLUEREDBLUESCRGREENGREENREDBLUESCRBLUEREDSCRREDBLUESCRGROUND LINKSWITCHBRIDGE/STEREOMODE SWITCHINPUT STAGE CIRUITRY316LMBRAMAIN 1ABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMAIN.S04Drawn By:VOLTAGE FUSE1 SOFTSTART 100V 2A T 22R/23W110V 2A T 22

15、R/23W220V 1.6A F 47R/23W240V 1.6A F 47R/23WTRANSFORMER SECONDARY VOLTAGESQUOTED VOLTAGES ARE OFF LOAD AC (RMS) RA1000 RA2000 RA3000RED 47 58 68ORANGE 47 58 68YELLOW 0 0 0GREEN 52 63 73BLUE 52 63 73RA3000 C69, C70, C71, C72, C75, C76, C77, C78 4700UF/110VRA2000 C69, C70, C71, C72, C75, C76, C77, C78

16、4700UF/110VRA1000 C69, C70, C75, C76 4700UF/110V C71, C72, C77, C78 NOT FITTED9LABEL2LABEL5LABEL4LABELSOFTSTARTFUSE 1LABELLABELLABELLABELLABELLABELLABELFUSE4FUSE3FUSE2FUSE1C74C73C68C67C802200UF/16VC792200UF/16VC76C75C78C77C72C71C70C69DBR2KBPC3504DBR1KBPC3504D23-D26IN4004RTHERM220R/1WTHERM1D33-D36IN4

17、004TXIECS1FUSERELAY3C8147UF/35VC8247UF/35VRA POWER SUPPLY3LMBCORRECT CONNECTIONWIRING DETAILS FORSEE TRANSFORMERCHASSISCON 5:1STAR GNDRLY3 (A)RLY3 (B)BLUEYELLOWBLACKBROWNORANGESWITCHMOUNTED MAINSFRONT PANEL24V DCFANLT+1LT-1HT+LT+LT+2LT-2HT-BLUEGREENORANGEYELLOWREDBROWNGREYGREEN/YELLOWREDREDBLACKENL0

18、V220V240VMAINS INPUT VOLTAGESELECTOR. CONNECTREQUIRED TRANSFORMERVOLTAGE TAP.UNUSED VOLTAGE TAP55C NORMALLY OPENTHERMAL SWITCHRA TRANSFORMER(4 OFF)(4 OFF)330NF/250V250V330NF/250V330NF/250V330NF/AC:1AC:2CTAC:3AC:446RAMAIN 4ABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRAMA

19、IN.S05Drawn By:R154100KDMODIN4148R7018V5LABEL3LABEL4LABELR13918k/2W12345CON 5LED3LED2LED11234566PIN1234566PIND27IN4004R614K7R62100KR6347KR6447KR6547KR6647KR6747KR68SEE NOTER6924KD7IN4004D8IN4004D9IN4004D101N4148D111N4148Q23BF422Q22BF422Q20BF422Q21BF423R149100KC38100UF/16VC39100UF/16VC37680NFRMOD1100

20、KQ25BF422Z79V1C40100uFQ24BF423RELAY1RELAY2D12IN4004Q46BF422R15110KR15210KR14118K/1WQ452SA958R150120RR14839KZ125V6C45C46THERM21111R1408K2LABELLABELLABELD30IN40042LABEL8LABELLMB65TO AC:1TO LT+21RAMAIN 5RA PROTECTIONTO DISPLAYTO AC:4YELLOWGREENRED250V100NF/250V100NF/INTERCONNECTFLEXISTRIPLT +VE CH2GNDL

21、T +VE CH1SWITCHCLOSED THERMAL90C NORMALLYBLUEBLUE6 WAYFLEXISTRIPINTERCONNECTLEDBRO/P1O/P2YELLOWGREYGREENGREENCH2CH1STATUS LED PCBPOWERBRIDGEPROTECTRLY3 (A)RLY3 (B) NOTE: RA1000/1 RA2000/1 RA3000/1 R68= 330R/5W 1K/5W 1K/5WABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet of File:D:PROTELRANEWNEWDI

22、SP.S01 Drawn By:RA4001 R1, R26 2K2/4W R7, R16 5K1 R27, R30 100K Z3, Z4 10VRA3001 R1, R26 3K3/4W R7, R16 6K8 R27, R30 (NOT FITTED) Z3, Z4 6V2RA2001 R1, R26 3K3/4W R7, R16 8K2 R27, R30 (NOT FITTED) Z3, Z4 6V2RA1001 R1, R26 2K2/4W R7, R16 13K R27, R30 (NOT FITTED Z3, Z4 7V5R25100KR24100KR234K7/1WR1956K

23、R1856KR171KR16R14510KR1310KR12100KR1110KR26C6100NFD41N4148Z218V/1.3WLED2LED3LED4LED5LED6LED7LED1Q8BF423Q7BF423C8470PFD61N4148Z4Q4BF423Q3BF422C51uFC4100NFD31N4148D11N4148C1100NFC21uFQ1BF422Q2BF423Z3D51N4148C7470PFQ5BF423Q6BF423LED8LED14LED13LED12LED11LED10LED9Z118V/1.3WD21N4148C3100NFR1R210KR3100KR41

24、0KR5510KR7R81KR956KR1056KR204K7/1WR21100KR22100K12345C1047UF/35VC947UF/35VZ99v1Z106v8Z114v7Z122V7SIG781234695IC2LB1443NSIG781234695IC3LB1443NZ59v1Z68Z74v7Z82V7Z1311VZ1411VQ9BC214LQ10BC214LR3147RR2847KR2947KR3247RQ11BC214LQ12BC214LR27R30*ONLY FITON RA4001ON RA4001ONLY FITTO CON: 5LMB663RA DISPLAYRA D

25、ISPLAY CARDSIGNAL PRESENT-40dB-20dB-12dB-7dB-4dB0dBCLIPGREENREDREDGREENCLIP0dB-4dB-7dB-12dB-20dB-40dBSIGNAL PRESENTLT +VE CH1CH1 O/PGNDCH2 O/PLT +VE CH2YELLOWYELLOWABCDEFTitleNumberRevisionSizeA3Date:1-Jul-1999 Sheet of File:D:PROTELRANEWRADISP.S06Drawn By:RA3000 R1, R26 3K3/4W R7, R16 6K8 Z3, Z4 6V

26、2RA2000 R1, R26 3K3/4W R7, R16 8K2 Z3, Z4 6V2RA1000 R1, R26 2K2/4W R7, R16 13KC947UF/35VC1047UF/35V12345R22100KR21100KR204K7/1WR1056KR956KR81KR7R61KR5510KR410KR3100KR210KSIG71P06P15P24P33P428IC3U257R1C3100NFD21N4148Z120V/1.3WLED9LED10LED11LED12LED13LED14LED8Q6BF423Q5BF423C7470PFD51N4148Z3Q2BF423Q1BF

27、422C2470NFC1100NFD11N4148D31N4148C4100NFC5470NFQ3BF422Q4BF423Z4D61N4148C8470PFQ7BF423Q8BF423LED1LED7LED6LED5LED4LED3LED2Z220V/1.3WD41N4148C6100NFR26SIG71P06P15P24P33P428IC2U257R1110KR12100KR1310KR14510KR151KR16R171KR1856KR1956KR234K7/1WR24100KR25100KYELLOWYELLOWLT +VE CH2CH2 O/PGNDCH1 O/PLT +VE CH1S

28、IGNAL PRESENT-40dB-20dB-12dB-7dB-4dB0dBCLIPGREENREDREDGREENCLIP0dB-4dB-7dB-12dB-20dB-40dBSIGNAL PRESENTRA DISPLAY CARDRA DISPLAY366LMBTO CON: 51234TitleNumberRevisionSizeA4Date:22-Jul-1999Sheet of File:D:PROTELRANEWREENTRY.S01Drawn By:CONCONCONCONCONCOND1710vD1610vTR2BC214LTR1BC184LD4IN4148D3IN4148D

29、2IN4004D1In4004C16n8C36n8R871kR85k6R71kR682kR58k2R41kR35k6R282kR18k2PCB1042/P1ION PCBRE-ENTRANT PROTECT1 1L BASHAMProtection 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 volt

30、age is fed to the base of Q25 via D11. When 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

31、collector of Q24 is connected via R68 R150 & 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 o

32、utput relays. Similarly Q23 is connected such 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.

33、 The combination of C38-C39 with R63 and R64 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,

34、 and hence opening the output relays. The Network 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

35、will, therefore, show a full-wave rectified 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.