Kenwood-MA300-pwr-sm1 维修电路原理图.pdf
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1、STEREO POWER AMPLIFIERM-A100/A300SERVICE MANUAL 1997-6/B51-5321-00 (K/K) 3668POWER AMPLIFIERPOWER-ON OFFSPEAKERS(6-16)SPEAKERS(6-16)+-CONNECT WITH AVCONTROL CENTERFRONTCENTERRR+-CLLUNSWITCHEDSWFRONT SURROUND WOOFERSUBSURROUNDKnob(K27-2211-04)Escutcheon *(B07-)Indicator(B12-0308-04)Panel *(A60-)Foot
2、x2 *(J02-)Dressing panel *(A21-)Lock terminal board(E70-0046-05)Look terminal board(E70-0046-05)AC power cord *(E30-)Rectangular receptacle(E58-0018-05)Metallic cabinet(A01-3429-01)AC outlet *(E03-)Power cord bushing(J42-0083-05)How to power on unit only.Connect a lead wire between P3 (GRY) and fuse
3、 holder (CN3 of F2) or (CN10 of F3), then push power sw.Illustration is M-A300.* Refer to parts list on page 16.1p3p/19p22p 97.6.2 4:11 PM yW 1RadioFans.CN 收音机爱 好者资料库M-A100/A3002CONTENTS / ACCESSORIESContentsCONTENTS / ACCESSORIES .2DISASSEMBLY FOR REPAIR.3ADJUSTMENT.4PC BOARD .5SCHEMATIC DIAGRAM .9
4、EXPLODED VIEW .15PARTS LIST.16SPECIFICATIONS .21AccessoriesParallel cord .(1)(E30-2857-05)AC plug adaptor .(1)(E03-0115-05)Use to adapt the plug on the power cardto the shape of the wall outlet.(Accessory only for regions where use isnecessary.)1p3p/19p22p 97.6.2 4:11 PM yW 2RadioFans.CN 收音机爱 好者资料库M
5、-A100/A3003DISASSEMBLY FOR REPAIR.21 11 11 11 11 11 11 12 2x3x2x2x2x2x21 11 11 12 21. Remove the 17 screws (1), then remove main PCB.2. Stand the set with right side downward, then connect theGND of the PCB (X07) (A/4) and the rear panel and thechassis with 2 alligator clips2.1p3p/19p22p 97.6.2 4:11
6、 PM yW 3M-A100/A3004ADJUSTMENTNo.ITEMINPUTSETTINGSOUTPUTSETTINGTUNERSETTINGSALIGNMENTPOINTSALIGN FORFIG.q 1 r IDLE CURRENT|Connect a DCvoltmeter acrossCN11(L)CN12(R)CN15(CENTER)CN16(SURROUND)(X07-)Volume : 0VR1(L)VR2(R)VR5(CENTER)VR6(SURROUND)(X07-)(L, R)17.6mV(CENTER, SUR-ROUND)13.2mVq 1 r|Connect
7、a DCvoltmeter acrossCN11(L)CN12(R)CN13(CENTER)CN14(SW)CN15(SL)CN16(SR)(X07-)Volume : 0VR1(L)VR2(R)VR3(CENTER)VR4(SW)VR5(SL)VR6(SR)(X07-)(L, R)17.6mV(CENTER, SW, SL,SR) 13.2mV IDLE CURRENTAUDIO SECTION (M-A300)AUDIO SECTION (M-A100) Turn on the unit for 5minutes before adjustment.1p3p/19p22p 97.6.2 4
8、:11 PM yW 4ACEGIBDFHJ2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)561p3p/19p22p 97.6.2 4:20 PM y W 5KLNPRTMOQS2135746Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD(Component side view)781p3p/19p22p 97.
9、6.2 4:23 PM y W 7XXXXXXXX()()()()()()()()()XXXXXXXDCBA1234567891012171615141311R104100C106220PC105100R103220PC104100R102220P100R101C108220P100R106C107100R105220P14GND(B)GND(+15V)13MUTE12SW POW. RET11SW POWER10DG9SRch8GND7SWch6SW OUT5GND4Rch3AG2AG1FRONT RELAY11POWERRETURN1258PROTECTION9CS RELAY10Cch6
10、GND7SLchAG3Lch4GND1AG2K2C103220PP10.01C770.01C450.01C78RETURNPOWERPROTECTIONMUTECS RELAYFRONT RELAYSWchDGSRchAGSLchGNDCchGNDRchGNDLch2.2KR1774.7u50C1+R1712.2K47R189R183R1C7680P2.7KR192.7KR13100K47K2KR25100u10C25+1R73C109100PR713KC3168P10KR43C3747P220R311/4W220R371/4WC85680P22 1/4WR55R6147C4347u100+2
11、20u100270R49C49+47KR671/4W1/4W1/4W33PC127R185R1792.2KR1732.2K680P100K47K2.7KR152.7KR21R271R75R3C9C27100u102KR51100PC1111/4W270+474.7u50C3+R191C12913KR947PC3968PC3347KR6933P1/4W10KR451/4WR392202201/4WR33680PC8722PC117R1872.2KR181R1752.2K22PC119R771R29R17C11R547K100K680P2.7K2.7K2KC29100u10R231/4WR53C1
12、13100P270+R7147KC5+4.7u50R1934713KR11C131C3568PR4710K33P1/4WC4147P1/4WR352201/4WR41220C89680PW83W81W82R654.7KR631001KR6447u16C48+47u25C47+12111098765432112111098123456789123456789101189101211PROTECTIONCS RELAYFRONT RELAYPOWER RETURNPOWERMUTE DRIVEGND+BGNDB(+15V)-BSLch NFCch NFLch NFSLch -Cch -Lch -S
13、Lch +Cch +Lch +SW POWER7R48C132R121/4W33P10K13K2.2KR182R188R1762.2K100u10R781C30C114R54270100P1/4W+R6100K47KC12680P2.7KR24R182.7KR302K+47C64.7u50R194C120R7247KC3668PC4247P22P8SW POW. RETR1846111210897R186 100K2.2KR180W5253412W27R1742.2KR1782.2K2.2KR172680P100K47K2.7KR142.7KR20R2622PC118R761C90R42R36
14、680P2201/4W2201/4WR28R16C10R447K680P2.7K2.7K2KC28100u10R221/4WR52C112100P270+R7047K654231MUTE DRIVE-BGND+B+B(+15V)GND(+15V)987SRch NFSRch -SRch +1/4WC4+4.7u50R1924713KR10C130C3468PR4610K33P1/4WC4047P1/4WR342201/4WR40220C88680P1R74R2C8C26100u102K220u100+47R62C46R50100PC1101/4W270+C4447u100+654321SWch
15、 -SWch NFSWch +Rch -Rch NFRch +474.7u50C2+R190C12813KR847PC3868PC3247KR6833P1/4W10KR44R561/4WR382202201/4WR32680PC8622 1/4W47u16C7547u25C74+1KR57100R584.7KR59+R210R20922K100KR207220R206C20322u25R204680 1WR20827K10K 1WR2114.7K1413M-A300M-A100GND(B)GND(+15V)MUTESW POW. RETSW POWERDGSRchGND(GUARD)SWchS
16、W OUTGND(GUARD)RchAGAG-CN3X07-A/42/22/2-CN2X07-A/42/2-CN4X07-A/42/2X07-A/4-CN1XTU.K.AUSTRALIANOR30ABB.YKPXU.S.A.COUNTRYDESTINATIONUNIT No.81W27,83W52,82,NOYESC109,110,113,114EUROPEEGENERAL MARKETMCANADAPCHINACX11-3770-71MALAYSIAINOYES1.5KX11-3773-00X11-3770-21X11-3742-91X11-3740-51X11-3742-71X11-374
17、0-10A , BC111,112NONOXAUSTRALIAX11-3770-72MALAYSIAGENERAL MARKETCOUNTRYX11-3773-01X11-3770-22X11-3742-92X11-3740-52MCHINAICPXU.K.YTNOYESX11-3742-72X11-3740-11UNIT No.EUROPECANADAU.S.A.EPKDESTINATIONABB.W27,81W52,82,83YESNO2K114C109-NOR30M-A100M-A300CYESYESNOA , BC15V15V15V15V-B+B15V15V+B-B+B+B-B+B-B
18、+B+B15V15V15V15V15V15V15V-B-B+B+B+B-B+B+B15V15V+B15V-B-B-B-B+B+B+B+B+B22.4V15.2V15.8V0V-11.4V-39.1V0V-39.1V0.6V40.5V41.1V-1.3V0V1.3V1.3V-1.3V0.6V0V-39.1V0V-39.1V-11.4V0V40.5V41.1V0.6V40.5V41.1V1.3V0V-39.1V-39.1V0V-11.4V0V-1.3V3.9V-11.4V3.9V0V-11.4V15.2V0V-39.1V39.1V0.6V0V1.3V-1.3V40.5V41.1V-11.4V0V1
19、5.2V-39.1V0V0.6V0V-1.3V41.1V40.5V39.1V1.3V-11.4V0V0.6V0V0V40.5V41.1V39.1V-39.1V1.3V-1.3V15.2V22.4V15.8VGND LINESIGNAL LINE+B+BD14CJ3D7Q1Q7Q121D1Q13Q19Q25PREMUTEFLchDRIVEQ123MUTECchD9Q27Q9Q3Q21Q15DRIVEPRED3Q125MUTESLchD11Q23Q17Q5Q11DRIVEPREQ29D5AD15Q31+15V AVRD16CN9CN6SURROUND chQ126MUTED12Q6Q12Q24Q1
20、8Q124MUTESWchBQ122D204MUTEFRchDRIVEPREQ30D6D10Q22Q16CN8Q4Q10DRIVEPREQ28D4D8CN7Q26Q8Q2Q20Q14DRIVEPRED2D17D18Q32+15V AVRD203Q203SR chMUTEDRIVERE4ABSWPRE OUTON/OFFSW PRE OUTE1E3E2WH1WH2WH2M-A100M-A300Q203Q121-126Q31,32Q25-30Q13-24Q1-12D204D203D15-18D1-12,14: 2SA1048(Y,GR) or 2SA1309A(Q,R) or: 2SC2878(B
21、): 2SC3940A(R,S) or 2SD863(E,F): 2SA1123(R,S): 2SC2631(R,S): 2SA992(F,E): RD8.2ES(B2) or HZS8.2N(B2) or: 1SS131 or HSS104AMTZJ8.2(B) or UZ-8.2BSB2SA933AS(Q,R) or 2SA1175(F,E)MTZJ3.9(B) or UZ-3.9BSB: RD3.9ES(B2) or HZS3.9N(B2) orMTZJ15(B) or UZ-15BSB: RD15ES(B2) or HZS15N(B2) orto C-V100/V150/TERMINA
22、LINPUTCchJ1V300/V350(X11- ) (C/4)(X11-37XX-XX) (A/4)(X11- ) (B/4)M-A100/A300(K) (1/2)+B LINE-B LINE A1234567BCDEFGIKMOHJLNY08-5610-10M-A100/A300CAUTION: For continued safety, replace safety critical com-ponents only with manufacturers recommended parts (referto parts list). indicates safety critical
23、 components. Forcontinued protection against risk of fire, replace only withsame type and rating fuse(s). To reduce the risk of electricshock, leakage-current or resistance measurements shallbe carried out (exposed parts are acceptably insulated fromthe supply circuit) before the appliance is return
24、ed to thecustomer.The DC voltage is an actual reading measured with a highimpedance type voltmeter with no signal input. The mea-surement value may vary depending on the measuringinstruments used or on the product.1p3p/19p22p 97.6.2 4:27 PM y W 9XXXXXXXXXXXXXXXXXFANXXXXXXXXXXXXXXXXXXXXXIC1BADC534125
25、213447 1/4WR10747 1/4WR101L1100R113VR12201/4WR1192.7K620R125C1010.01W201C211470R1311210KR14310KR137101/4W3.9R149C1070.047C113R1552WR1334701000.047C11547 1/4WR109220VR3R11547 1/4WR1031/4WR1571R1273451/4W2R13912620C1030.012W103.9R1512.7KR12142513L3C213C109W203R14510K10KR13547010047 1/4WR1110.047C11722
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