Cambridge-L990CT-int-sch维修电路原理图.pdf

上传人：cc518

文档编号：100624

上传时间：2020-11-04

格式：PDF

页数：4

大小：513.22KB

《Cambridge-L990CT-int-sch维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Cambridge-L990CT-int-sch维修电路原理图.pdf（4页珍藏版）》请在收音机爱好者资料库上搜索。

1、12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. ? DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE L990_TOP.PRJ A & R Cambridge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9QR A90 Amplifier and PSU update - Top Sheet Circuit Diagram L990_TOP J Roscoe17

2、-Aug-2005 INITIALS Date Printed 14Sheetof Notes: Top+ Top- SK100A CAMCON_G Bot+ Bot- SK100B CAMCON_G Top+ Top- SK101A CAMCON_G Bot+ Bot- SK101B CAMCON_G D100 1N4003F D101 1N4003F EMC 1 N F SK104A PHONO4G N F SK104B PHONO4G 0V_SIG 0V_SIG 0V_SIG 1 2 3 SW100A 2PCO 4 5 6 SW100B 2PCO C100 1N0 SM 1 2 3 4

3、SK102 AMPCT4 STANDBY SPKR1 ON SPKR2 ON THERMPROT VIPROT DCPROT AC PRESENT L SIG R SIG SPKR1 ON SPKR2 ON THERMPROT VIPROT AC PRESENT DCPROT LS L LS R L SIG 0V_SIG 0V_LS_L 0V_HF_L +49V -49V+5V_D +49V -49V 0V_D 0V_PSU R SIG 0V_SIG 0V_LS_R 0V_HF_R +49V -49V 0V_TRIG LS L 0V_LS_L 0V_LS_R LS R +49V 0V_D VI

4、PROT_L DCPROT_L DCPROT_L VIPROT_R DCPROT_R DCPROT_R VIPROT_L VIPROT_R STANDBY +49V +5V_D 0V_D 0V_PSU 0V_LS_R 0V_HF_R 0V_LS_L0V_HF_L 0V_D 0V_TRIG 0V_SIG R103 470R 1W CF R104 470R 1W CF R105 33R 1W CF R106 33R 1W CF LHC 2 RHC 3 1 4 L 5 6 R 7 SK105 HPSKT LS L LS R 0V_LS_L REMOTE REMOTE FROM PREAMP INTE

5、GRATED / PRE-POWER MODE SELECT SWITCH TRIGGER TRIGGER TP102 TP101 TP100 TP103 TP104 TP105 TP106 TP107 TP108 TP109 TP110 TP117 TP111TP113TP115 TP112TP114TP116 0V_D+5V(D) VPOS VNEG 0V_PSU PWRON THPROT_uCVIPROT_L VIPROT_RVIPROT_uC AC_PRES0V_TRIG DCPROT_L DCPROT_R DCPROT_uC RC5 IN TRG IN L990_MICRO L990

6、_MICRO.SCH INPUT 0V_SIG VIPROT DCPROT OUTPUT0V_LS 0V_HF VPOS VNEG L990_PA_L L990_PA_L.SCH INPUT 0V_SIG VIPROT DCPROT OUTPUT0V_LS 0V_HF VPOS VNEG 0V_FB_R L990_PA_R L990_PA_R.SCH TR100 BD179 TR101 BD179 R101 100R SM R102 100R SM R107 220R SM R108 220R SM PCB PCB L990PB_1 TP118 TP119 TP120 TP121 1 2 3

7、4 5 6 7 8 9 10 11 12 13 14 SK103 FFC 14W 2.54MM VER EARTH LEAD 8M101 EL EARTH LEAD 1 2 PL100 1 2 PL101 R100 10R MF 05_E103JAR19/05/05A.0 SEE ECO 02_E313 FIT SK103 ON PCB TO LINE UP WITH SILK SCREEN ON SIDE OF C209 ON SIDE OF C210 ON SIDE OF RLY100 ON SIDE OF RLY101 15mm x 6mm x 3mm DAMPING PAD E802A

8、P DP100 15X6X3_DAMPING_PAD 15mm x 6mm x 3mm DAMPING PAD E802AP DP101 15X6X3_DAMPING_PAD 15mm x 6mm x 3mm DAMPING PAD E802AP DP102 15X6X3_DAMPING_PAD 15mm x 6mm x 3mm DAMPING PAD E802AP DP103 15X6X3_DAMPING_PAD 0V_TRIG R109 0R0 SM RLY101A RLY G5PA-2 24V A209 RLY101B RLY G5PA-2 24V A209 RLY100B RLY G5

9、PA-2 24V A209 RLY100A RLY G5PA-2 24V A209 12 RLY100C RLY G5PA-2 24V A209 RLY101C RLY G5PA-2 24V A209 0V_FB_R RLY102A RLY DPDT 5V SM A216 RLY102B + - RLY102C RLY DPDT 5V SM A216 AC PRESENT Q100 BC849B R110 470R SM 0V_D +5V_D D102 BAS16W SM R111 470R 1W CF R112 470R 1W CF HEADPHONE SNAP OFF TO H/PHONE

10、 FIX100 FIXING HOLE 3.2 R113 100R 1W CF R114 470R SM 1 2 3 4 5 SK106 AMPCT5 1 2 3 4 5 SK107 AMPCT5 0V_D SP100STAR_8 Q101 BC849B BOARD R115 4K7 SM STANDBY This line is active High Relay RLY102 is on (allowing signal to headphones) only when ACpresent is low & notSTANDBY is high. notSTANDBY is the sam

11、e as PWRON notSTANDBY Replace obsolete relays + circuit improvementsWas L882AY issue 4.0 05_E165AJD15/08/051.0Fix Ground on trigger and add Diode to trigg out release issue 05_E165AJD15/08/051.1Fix Headphone mute circuit. RadioFans.CN 收音机爱好者资料库 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. ?

12、DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE L990_MICRO.SCH A & R Cambridge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9QR A90 Amplifier & PSU update - Microcontroller Interface Circuit Diagram L990_MISC J Roscoe17-Aug-2005 INITIALS Date Printed 24She

13、etof Notes: L N E NEL SK203 IEC3 NO RIVETS BC200 TOOLING4.1 1GREEN SK202 CAGECLAMP1 C205 3N3 MAINS C206 3N3 MAINS Far from PCB SK201B JACK3.5X2 GNDN SWN SIGN Near to PCB SK201A JACK3.5X2 SW200B VOL SEL SLIDE SW200A VOL SEL SLIDE C208 3N3 MAINS C207 3N3 MAINS Vin I GND G Vout O IC201 L4940V5 D203 1N4

14、003F D201 1N4003F D202 1N4003F D200 1N4003F C225 100N CD C226 100N CD + 1 2 - 4 3 BR200 BRGBU8D LIVENEUTRAL EARTH EMC Shield SH200 EMCMAINS NEUTRAL LIVE LIVE NEUTRAL 0V_D +5V(D) 0V_D 0V_PSU VPOS VNEG 0V_PSU +49V +5V_D 0V_D PWRON -49V +5V_D TH200 PTH90DEG +5V_D 0V_D THPROT_uC VIPROT_L VIPROT_R +5V_D

15、0V_D VIPROT_uC 0V_D 9VRMS +5V_D 0V_D 9VRMS +C229 22U EL AC_PRES + C227 3300u 25V +C228 1000u 10V 2 3 4 6 7 8 15 SK204 MOLEXPWR8 1 2 3 4 5 6 SK200 MOLEXPWR6 D206 BAS16W SM TR204 BC849B R211 10K SM R220 10R SM R200 1K0 SM TR202 FMMT597 D205 BAS16W SMC213 10N SM TR203 FMMT497 DZ207 15V 350MW SM +C223 1

16、0U EL +C222 10U EL R210 10K SM +49V 0V_TRIG 0V_TRIG 12 IC202A 74HC14D 34 IC202B 74HC14D 1011 IC202E 74HC14D 1213 IC202F 74HC14D C214 10N SM C215 10N SM R213 4K7 SM R214 4K7 SM TR205 BC856B R206 1K0 SM C218 10N SM C203 100N SM DCPROT_L DCPROT_R +5V_D 0V_D DCPROT_uC 0V_D 56 IC202C 74HC14D 89 IC202D 74

17、HC14D C216 10N SM C217 10N SM R215 4K7 SM R216 4K7 SM TR206 BC856B R207 1K0 SM C220 100N SM C204 100N SM 14 7 IC202G 74HC14D C201 100N SM C202 100N SM R205 1K0 SM R221 10R SM C224 100N CD R219 1K8 SM R212 4K7 SM TR201 FMMT497 TRIGGER OUTPUT APPROX 13.5VDC 60mA MAX CURRENT R201 1K0 SM R202 1K0 SM R20

18、3 1K0 SM R204 1K0 SM C219 10N SM C221 10N SM MAINS WIRING AND AUXILIARY SUPPLY POWER AMP SUPPLY MICROPROCESSOR SIGNALS INTERFACE HS HS200 TO220HS08REG 1 2 3 4 5 6 SK205 AMPCT6 RLY200A DPDT5V RLY200B DPDT5V RLY200C DPDT5V TR200 BD179 R217 10R SM R218 10K SM STANDBY RELAY CONTROL 0V_TRIG RC5 IN MODULA

19、TED RC5 REMOTE CONTROL INPUT TP206 TP200 TP207 TP203 TP201 TP202 TP210 TP204 TP205 TP208 TP209 TP211 TP212 +C209 10,000u 63V +C210 10,000u 63V CHASS SK101C CAMCON_G C235 1N0 SM C234 220N X2 CLASS F202 T750mA SM F200 T4A F201 T4A NF C211 100N PE C212 100N PE R227 1K0 SM DZ204 4V7 350MW SM TRG IN R226

20、 470R SM C200 100N SM C232 100N SM C230 100N SM C231 100N SM 115V 115V 6 4 2 1 0V 5 8 9V 0V 9V 3 7 0V 6VA TX200 TX 6VA 9311 C237 100N SM C238 100N SM C236 100N SM C233 100N SM L200 27mH C241 680P PP 3 2 1 IC200A LM393A SM R223 10K SM R229 100K SM R209 10K SM R224 1K8 SM R230 1K5 SM 5 6 7 IC200B LM39

21、3A SM 84 IC200C LM393A SM R225 1K8 SM C242 1N0 SM R208 10K SM C239 100N SM +5V_DCARRIER FILTER AND DEMODULATOR C240 10N SM +C243 10U EL R222 10K SM R228 0R0 SM R232 0R0 SM 05_E103JAR19/05/05A.0Replace obsolete relays + circuit improvementsWas L882AY issue 4.0 0V_TRIG Not Fitted D204 1N4003F 05_E165A

22、JD15/08/051.0Fix Ground on trigger and add Diode to trigg out release issue R231 1M5 VR37 RadioFans.CN 收音机爱好者资料库 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. ? DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE L990_PA_L.SCH A & R Cambridge Ltd. Pembroke Avenue Denny Industri

23、al Centre Waterbeach Cambridge CB5 9QR A90 Amplifier update - Power Output Stage Left Circuit Diagram L990_PA_L J Roscoe17-Aug-2005 INITIALS Date Printed 34Sheetof Notes: R324 1K0 SM TR300 FMMT597 TR301 FMMT597 R315 100R SM R316 100R SM R319 100R SM TR314 FMMT497 TR315 FMMT497 R317 100R SM R318 100R

24、 SM R320 100R SM R322 22R SM C317 470N PE 0V_SIG 0V_SIG INPUT 0V_SIG R350 5R6 2W CF C319 100N PE 0V_HF0V_LS C313 100N SM R341 390R SM R342 390R SM R343 100R SM R344 100R SM R345 220R SM R346 220R SM R334 10K SM R336 10K SM D301 BAS16W SM D302 BAS16W SM TR312 FMMT497 TR304 FMMT597 TR313 FMMT497 TR302

25、 FMMT597 DZ305 4V7 350MW SM 0V_HF VIPROT C320 100U NP TR305 FMMT597 DZ306 4V7 350MW SM 0V_HF DCPROT OUTPUT 0V_LS 0V_HF VPOS VNEG 0V_HF 0V_HF DZ300 15V 350MW SM DZ301 15V 350MW SM C309 100N SM C310 100N SM C314 100N SM 0V_SIG 0V_SIG D304 1N4003F D303 1N4003F R302 10K SM R327 22K SM RV300 100R PSET C3

26、12 10N SM 1 2 PL300 BIAS R325 1K0 SM R326 1K0 SM ADJ BIAS D300 BAS16W SM R300 10K SM R309 10K SM R305 10K SM R306 10K SM +C305 10U EL MEASURE TR318 SAP15N TR319 SAP15P R301 10K SM C315 100N SM R347 100R SM R349 100R SM R348 100R SM R340 100K SM DZ302 4V7 350MW SM DZ303 4V7 350MW SM 3 2 1 84 IC300A T

27、L072CD 5 6 7 IC300B TL072CD R328 4K7 SM 0V_HF 0V_SIG TR311 FMMT497 TR303 FMMT597 TR310 FMMT497 TR307 FMMT597 C307 100P SM C308 100P SM INPUT FILTERV TO I AMP DC SERVO PNP CURRENT MIRROR NPN CURRENT MIRROR PRE DRIVER PRE DRIVER OUTPUT STAGE OUTPUT STAGE V-I PROTECTION V-I PROTECTION VI PROTECT SIGNAL

28、 TO MICRO DC OFFSET DETECTION DC OFFSET SIGNAL TO MICRO ZOBEL NETWORK TR316 FMMT497 TR308 FMMT597 TR317 FMMT497 R311 10K SM R312 10K SM R313 10K SM R303 10K SM R304 10K SM R307 10K SM R310 4K7 SM R329 4K7 SM + C300 100U EL + C301 100U EL R338 150R SM R339 150R SM R308 22K SM R314 10K SM TR309 FMMT49

29、7 TR306 FMMT597 R323 33R SM R321 33R SM TP302 TP303 TP304 TP307 TP308 TP305 TP306 R337 22R SM R331 820R SM R332 820RSM R330 1M0 SM R333 3K3 SM R335 3K3 SM L300 2U2H LAC SMALL R351 5R6 2W CF +C318 10U EL TR321 FMMT597 TR320 FMMT497 +C302 100U EL 100V +C306 100U EL 100V R352 470R 2W MF 5% R353 470R 2W

30、 MF 5% BOOTSTRAP BOOTSTRAP (SET TO 16mV) +C303 100U EL +C304 100U EL TR322 FMMT497 R354 1K0 SM R355 6K2 SM C311 100N PE C316 470P FKP2 100V C321 100N SM R357 0R0 SM 0V_SIG R356 220K SM 0V_SIG D305 22V 350MW SM D306 22V 350MW SM R358 1K0 SM R359 1K0 SM R360 820R SM R361 820R SM 05_E103JAR19/05/05A.0R

31、eplace obsolete relays + circuit improvementsWas L882AY issue 4.0 05_E165AJD15/08/051.0Fix Ground on trigger and add Diode to trigg out release issue 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. ? DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE L990_PA_R.SCH A & R Cambridge

32、 Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9QR A90 Amplifier update - Power Output Stage Right Circuit Diagram L990_PA_R J Roscoe17-Aug-2005 INITIALS Date Printed 44Sheetof Notes: R424 1K0 SM TR400 FMMT597 TR401 FMMT597 R415 100R SM R416 100R SM R419 100R SM TR414 FMMT497

33、 TR415 FMMT497 R417 100R SM R418 100R SM R420 100R SM R422 22R SM R430 1M0 SM R431 820R SM R432 820R SM C417 470N PE 0V_SIG 0V_SIG INPUT 0V_SIG R450 5R6 2W CF C419 100N PE 0V_HF0V_LS C413 100N SM R441 390R SM R442 390R SM R443 100R SM R444 100R SM R445 220R SM R446 220R SM R434 10K SM R436 10K SM D4

34、01 BAS16W SM D402 BAS16W SM TR412 FMMT497 TR404 FMMT597 TR413 FMMT497 TR402 FMMT597 DZ405 4V7 350MW SM 0V_HF VIPROT C420 100U NP TR405 FMMT597 DZ406 4V7 350MW SM 0V_HF DCPROT OUTPUT 0V_LS 0V_HF VPOS VNEG 0V_HF 0V_HF DZ400 15V 350MW SM DZ401 15V 350MW SM C409 100N SM C410 100N SM C414 100N SM 0V_SIG

35、0V_SIG D404 1N4003F D403 1N4003F R402 10K SM R427 22K SM RV400 100R PSET C412 10N SM 1 2 PL400 BIAS R425 1K0 SM R426 1K0 SM ADJ BIAS D400 BAS16W SM R400 10K SM R409 10K SM R405 10K SM R406 10K SM +C405 10U EL MEASURE TR418 SAP15N TR419 SAP15P R401 10K SM C415 100N SM R447 100R SM R449 100R SM R448 1

36、00R SM R440 100K SM DZ402 4V7 350MW SM DZ403 4V7 350MW SM 3 2 1 84 IC400A TL072CD 5 6 7 IC400B TL072CD R428 4K7 SM 0V_HF 0V_SIG TR411 FMMT497 TR403 FMMT597 TR410 FMMT497 TR407 FMMT597 C407 100P SM C408 100P SM INPUT FILTERV TO I AMP DC SERVO PNP CURRENT MIRROR NPN CURRENT MIRROR PRE DRIVER PRE DRIVE

37、R OUTPUT STAGE OUTPUT STAGE V-I PROTECTION V-I PROTECTION VI PROTECT SIGNAL TO MICRO DC OFFSET DETECTION DC OFFSET SIGNAL TO MICRO ZOBEL NETWORK TR416 FMMT497 TR408 FMMT597 TR417 FMMT497 R411 10K SM R412 10K SM R413 10K SM R403 10K SM R404 10K SM R407 10K SM R410 4K7 SM R429 4K7 SM + C400 100U EL +

38、C401 100U EL R438 150R SM R439 150R SM R408 22K SM R414 10K SM TR409 FMMT497 TR406 FMMT597 R423 33R SM R421 33R SM (SET TO 16 mV) TP402 TP403 TP404 TP405 TP406 TP407 TP408 R437 22R SM R433 3K3 SM R435 3K3 SM R451 5R6 2W CF +C418 10U EL TR421 FMMT597 TR420 FMMT497 +C402 100U EL 100V +C406 100U EL 100

39、V R452 470R 2W MF 5% R453 470R 2W MF 5% BOOTSTRAP BOOTSTRAP +C403 100U EL +C404 100U EL L400 2U2H LAC SMALL TR422 FMMT497 R454 1K0 SM R455 6K2 SM C411 100N PE C416 470P FKP2 100V C421 100N SM R457 0R0 SM 0V_SIG R456 220K SM 0V_SIG D405 22V 350MW SM D406 22V 350MW SM R458 1K0 SM R459 1K0 SM R460 820R SM R461 820R SM 05_E103JAR19/05/05A.0Replace obsolete relays + circuit improvementsWas L882AY issue 4.0 05_E165AJD15/08/051.0Fix Ground on trigger and add Diode to trigg out release issue