Kenwood KAC-7204 Power AMplifier 电路图.pdf

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1、SERVICE MANUAL This product uses Lead Free solder. This product complies with the RoHS directive for the European market. 2008-1 PRINTED IN JA PAN B53-0612-00 (N) 519 KAC-7204 POWER AMPLIFIER Stereo/Bridgeable Power Amplifier BASS BOOST LEVELdB LPF FREQUENCYHz HPF FREQUENCYHz INPUT SENSITIVITYV MINM

2、AX OFFLPF FILTER LINE INLINE OUT HPF SP LEVEL INPUT SIGNAL SENSING TURN-ON FUSE40AP .CON LEFTRIGHT BRIDGED POWER INSPEAKER OUTPUT Accessories (W01-1606-05) Screw & wrench key set (N99-1820-05) Connecting cord assy (E30-6145-05) 19cm Stereo/Bridgeable Power AmplifierM type E,K type Dressing Panel (A2

3、1-6640-01): (E,K type) (A21-6641-01): (M type) Fuse (40A) (F52-0016-05) RadioFans.CN 收音机爱 好者资料库 2 KAC-7204 BLOCK DIAGRAM COMPONENTS DESCRIPTION Bass Boost SP OUTPUT ISO-AMP ISO-AMP SENS. VOL LINE IN L R (0.25V) L R LINE OUT Bass Boost MUTEATT POWER AMP MUTEATT BATT. GND P-CON POWER ON/OFF LC FILTER

4、B 15V AVR DC/DC CON FAN AVR THERMAL DET OVERLOAD DET DC-OFFSET DET FAN L R (INV) L.P.F FREQ H.P.F H.P.F FREQ (50200Hz) FREQ LPF/OFF/HPF FREQ (40Hz) L+ L- R- R+ SIGNAL DETECTOR P-CON PRIORITY -0.83dB_ATT +6.85dB_AMP =6.0dB -0.5dB_ATT +16.4dB_AMP =15.9dB +15.8dB 40Hz=18dB 40A x1 -0.83dB_ATT +6.85dB_AM

5、P =6.0dB POWER AMP 40Hz=18dB (50200Hz) (50200Hz) IC2 IC1 IC7 IC12 IC7 IC8 IC8 IC10 IC11 Q281,283 Q282,284 Q241 Q242 Q201.229 Q202.226 Q215-218,610Q611,612TH601,602,605 Q1,2D5,6 Q50,D50,52Q605Q604 IC5 Q609, 699 AUDIO UNIT (X09-8760-10) Ref. No.Application / FunctionOperation / Condition / Compatibili

6、ty IC1,2Isolation circuit IC5DC/DC converter IC6Temperature ATT controlATT2=on by pin1=H, ATT1=on by pin7=H IC7HPF IC8 Buffer amplifi er, Rch inversion amplifi er IC10,11bass-boost IC12LPF Q1,16+15V power supply Q2,17-15V power supply Q38DC/DC switching FET Q914DC/DC switching FET drive Tr Q15Temper

7、ature ATT reference power supply Q50,51auto_pcon_offDisables operation of the auto_pcon circuit when the pcon_ is connected RadioFans.CN 收音机爱 好者资料库 3 KAC-7204 Ref. No.Application / FunctionOperation / Condition / Compatibility Q201204 Differential fi rst stage amplifi er Q205208 Differential second

8、stage amplifi er Q209,210Differential second stage current mirror Q211,213Temperature compensation Tr Q215218Current limiter Q220,222227,229 Power amplifi er fi nal Tr Q241,242mute_TrMute_on when is ON Q251258 Power amplifi er driver Q281,282ATT2_TrThe signal level becomes -3dB when is ON Q283,284AT

9、T1_TrThe signal level becomes -1.5dB when is ON Q602Mute controlON when is pcon_off Q603,698Power supply for the mute_Tr Q604SW14VPower supply for DC/DC_IC Q605Pcon controlON by pcon=H Q606Over voltage detectionTurn off Q605 when over voltage is detected Q609Power supply for FAN Q610Over current pro

10、tection Q611,612DC protection Q613,614Latch circuit for DC protectionHold the protection operation while the DC protection is being operational Q615,616Shock noise prevention circuit Q617,618Shock noise prevention circuit control NO.ITEMALIGNMENT POINTMETHODALIGN FORNOTE 1 IDLE CURRENT VR5 (Lch) VR6

11、 (Rch) Connect a DC voltmeter between check land. Lch: Q223_emitter W148 Rch: Q224_emitter W21 2.5mVafter 5minutes from power on ADJUSTMENT VR6 VR5 X09-876 Q227Q223 W148 R245 DC voltmeter Lch 2.5mV Q224 Q220 Rch Lch + - W21 R243 DC voltmeter Rch 2.5mV - + COMPONENTS DESCRIPTION RadioFans.CN 收音机爱 好者资

12、料库 4 KAC-7204 ABCDE 1 2 3 4 5 6 7 R608 C129 R5 R609 R35 R6 R610 R612 R615 R49 R626 R640 C14 C52 C600 C617 R9 R10 R15 R16 R18 R22 R24 R34 R58 R147 R606 R613 R614 TH605 C121 R11 R12 R13 R14 R17 R19 R20 R21 R23 R25 R26 R27 R53 R54 R55 R56 R57 R59 R60 R61 R289 R290 R603 R604 R605 R607 R611 R620 R621 R62

13、7 R650 R72 W305 W304 W306 W303 W307 W308 W302 W309 W311 W310W312 W313 R691 W292 W291 W294W293 W296 W300 W301 C621 W295 W297 W298 W288 R695 R694 R693 R692 R699 R62 B E B EB E B E B E BE B E BE B E BE B E B E BE B E 18 169 C7 C6 -15V +15V B E +B -B SP-GND SP-R BATT 4.5V SW14V -15V SP-R SP-L TH-GND SP-

14、L +B -B W331 W332 W428 W151 W154 W427 W136 W181 W152 W155 W157 W402 W426 W430 W141 W14 W5 L3 W404 W431 W403 W192 W164 W145 W191 W405 W401 W406 W407 W408 W409 W413 W410 W411 W412 W414 W415 W416 W417 W418 W419 W420 W421 W422 W423 W424 W15 W27 C699 W165 W425 W93 W429 W153 1234567 W174 W173 C10 C11 L1 L

15、2 C1 C16 C8 C9 C17 C19 C20 C50 C51 C601 C602 C603 C13 C15 C18 C24 R7 R8 R28 R29 R30 R155 R273 R245 R275 R616 W129 W147 W146 W119 W118 W4 W182 W W125 W123 W149 W194 W193 W186 W187 W188 W189 W190 W185 W184 W183 W180 W179 W178 W175 W148 W170 W167 W169 W168 W172 W171 W177 W176 W195 W139 W138 W135 W137 W

16、140 W144 W150 W128 W124 W122 W117 W166 W1 W131 W143 W156 W161 W160 W159 W158 W162 W163 W134 W133 W132 W120 W11 W12 W16 W1 EB E 21 EB SDG SDGSDGSDGSDGSDG EB EB Q698 Q15 Q9 Q12 D9 D600 D604 D609 Q10 Q11 Q51 Q602 Q605 Q606 D8 D10 D606D607 Q13 Q14 Q50 Q603 P1 D699 D5 Q223Q227 D6 Q604 D1 D2 J3 Q609 Q3 Q4

17、 Q5 Q6 Q7 Q8 D7 D50 D601 D602 D603 D605 D611 Q211 CN2 IC5 AUDIO UNIT X09-8760-10 (J76-0476-11) PC BOARD (FOIL SIDE VIEW) X09-8760-10 Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address IC15HIC85GQ22F

18、Q74BQ123CQ172FQ2034HQ2084HQ2152H IC25HIC106FQ35BQ83BQ133CQ505EQ2044HQ2093HQ2165I IC53CIC116FQ44BQ93CQ143CQ515EQ2054GQ2103HQ2173H IC64FIC126HQ54BQ103BQ153CQ2014HQ2063HQ2112DQ2182H IC75GQ12FQ64BQ113BQ162FQ2024HQ2074GQ2133IQ2205I 5 KAC-7204 Refer to the schematic diagram for the values of resistors and

19、 capacitors. JIHGF 1 2 3 4 5 6 7 W225 C36 C126 C129 C145 C148 R51 R241 R242 R1 R3 R215 R216 R217 R218 R661 C34 C120 C127 C146 C147 R52 R600 R636 R638 R2 R4 R629 R660 R664 R626 R640 C133 C134 C135 C139 C600 C609 C610 C614 C616 C620 R100 R115 R116 R118 R123 R124 R131 R133 R134 R135 R137 R140 R141 R143

20、 R146 R147 R150 R159 R163 R167 R227 R228 R633 R634 R646 R649 R659 R665 R666 R667 R668 TH601 TH602 C101 C102 C105 C106 C107 C108 C113 C114 C117 C118 C121 C124 C125 C128 C130 C131 C132 C137 C138 C141 C205 C206 C219 C220 C221 C222 C227 C228 C607 C613 C149 R50 R103 R104 R105 R106 R107 R108 R109 R168 R11

21、1 R112 R113 R114 R117 R119 R120 R121 R122 R125 R126 R127 R128 R129 R130 R132 R136 R138 R139 R142 R144 R145 R148 R149 R151 R152 R153 R154 R156 R157R158 R160 R161 R162 R165 R201 R205 R206 R207 R208 R209 R210 R223 R224 R225 R226 R229 R230 R231 R232 R237 R238 R239 R240 R249 R250 R251 R260 R263 R264 R265

22、 R266 R280 R281 R283 R285 R286 R287 R290 R422 R423 R71 R602 R617 R618 W321 R624 R625 R628 R630 R631 R632 R635 R639 R643 R647 R648 R651 R652 R653 R656 R658 R662 R663 R914 R915 R916 R72 W277 W255 R74 R73 W275 R696 W322 W200 W201 R169 W328 W270 W266 W202 W204 W211 W245 W223 W203 W205 W226 W218 W241 W25

23、2 W260 W250 W246 W234 W235 W227 W237 W228 W231 W269 W276 W272 W283 W287 W253 W323 W208 W207 W206 W216 W209 W214 W213 W212 W210 W219 W229 W217 W215 W273 W258 W254 W256 W267 W232 W233 W224 W221 W325 W236 W230 W238 W299 W244 W243 W249 W248 W239 W240 W242 W247 W280 W257 W265 W263 W268 W314 W259 W274 W28

24、1 W278 W261 W262 W324 W271 W279W284 W286 W288 W315 W317 W318 W220 W282 R698 C232 C230 C233 C231 C698 W326 W320 R171 R170 W327 R110 W285 C150 B EB E B E B EB E B E B E B E B E B E B E 41 58 58 41 58 14 58 14 58 14 14 58 14 58 14 58 EB SENS. HPF-FLPF-F MAX -15V +15V OUTIN E B R SP-L SP-R SP-R +B -B +B

25、 SP-R +15V -15V AGND FAN+B AMP-IN-L AMP-IN-R RL PIN-G LPF SENS BB H/OFF/L HPF L 10 9 2 1 LRR LED+B BB-G L-NF -B +B B E L+ L- W13 W136 W79 W97 W141 W142 W400 W55 W73 W59 W70 W431 C223 W63 W127 W196 R697 W69 W199 W95 W93 W330 C2 W21 C3 C611 C612 C615 C606 R202 C57 C58 C4 C5 C50 C51 C140 C203 C204 C207

26、 C208 C225 C226 C263 C264 C604 C605 C608 C618 C619 R622 W23 R203 R204 W25 C103 C104 C109 C110 C111 C112 C115 C116 C119 C122 C123 C136 C143 C201 C202 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 W30 W31 W33 W24 R101 R102 R277 R274 R278 R211 R212 R213 R214 R219 R220 R221 R222 R233 R234 R235 R236

27、R243 R246 R247 R248 R257 R258 R261 R262 R271 R272 R275 R276 R279 R282 W29 W32 W34 R619 W129 W198 7 6 9 8 W115 W26 W104 W121 W53 W125 W37 W123 W28 W38 W42 W114 W56 W58 W65 W67 W66 W72 W75 W62 W60 W90 W64 49 W88 W77 W91 W100 48 W87 W22 W20 W35 W36 W48 W47 W46 W45 W52 W51 W89 W74 W86 W41 W40 W43 W44 W1

28、11 W110 W109 W108 W113 W112 W83 W82 W81 W80 W85 W84 39 38 W54 W135 W128 W124 W122 W99 W96 W94 W71 W92 W61 W68 W106 W117 W39 W50 W76 W101 W78 W105 W107 W116 W49 W130 W131 43 W134 W133 W132 W120 W14 W10 W197 VR1 VR2 VR3 VR4 BE BE L MAX EBEB EB 21 E B E B E B BE BE BE BE BE BE BE EB BE B E BE BE BE BE

29、BE B E BE BE BE BE BE B E B E BE EB EB BE BE D101 D102 D3 D4 D608 D609 D614 D104 Q241 Q242 Q281 Q282 Q283 Q284 D52 D229 D253 D254 D255 D295 D296 D617 Q614 Q615 Q616 Q617 Q618 D103 J1J2 Q699 Q1 Q220 Q224 Q251 Q253 Q256 Q258 Q2 Q222 Q225 Q226 Q229 Q252 Q254 Q255 Q257 Q610 Q609 D615 D624 Q611 Q612 Q613

30、 D152 D203 D204 D205 D206 D251 D261 D601 D612 D613 D616 Q16 Q17 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 Q209 Q210 Q213 Q215 Q216 Q217 Q218 D610 CN1 S6 D260 IC1 IC2 IC7 IC8 IC10 IC11 IC12 IC6 VR5 VR6 Ref. No. AddressRef. No. AddressRef. No. AddressRef. No. AddressRef. No. AddressRef. No. AddressRef.

31、No. AddressRef. No. Address Q2222IQ2272DQ2523HQ2572GQ2844GQ6066DQ6133GQ6184F Q2232EQ2292GQ2533GQ2584HQ6025DQ6093FQ6144FQ6985E Q2244IQ2414GQ2543HQ2814GQ6035DQ6103GQ6154G Q2252HQ2424GQ2552HQ2824GQ6045DQ6114FQ6164G Q2263IQ2513GQ2565HQ2834GQ6056DQ6124GQ6174F 6 KAC-7204 X09-8760-10 (1/3) ABCDE 1 2 3 4 5

32、6 7 -15.0V -13.9V 12.5V 15.0V 15.0V -15.0V (X09-8760-10) D295 D296 Q202 Q210 D261 Q204 Q213 Q282Q284 Q281Q283 Q242 Q241 Q201 Q207 Q206 D152 D251 Q205 Q208 D254 D253 Q203 Q209 Q211 D206D204 Q216 Q218 D205 D25 Q217 Q215 FAN CN2 CN1 INPUT SP J2 LINE ARAL IN RL OUT LINE D624 D52 D260 D102 D104D103 IC2 (

33、1/2) (2/2) IC2 J1 D101 IC1 (1/2) (2/2) IC1 D203 L Q50 D50 Q51 AUTO P CON ISO ATTMUTE FAN 100 C228 1 3 2 R265 TP3 R R280 11K 10K R285 R286 10K R915 R916 10K 10K R287 24K R914 10u50 47P C202 10K R266 10K 30K R204 22K R242 10K R218 R216 150 R240 150 R260 33 4.7K R220 6.2K R212 R210 100 R264 1K C208 C20

34、6 4700P C264 47u25 1.5K R222 6.2K C212 220P 220P 470 VR6 10P C210 R214 22K R290 100 R226 C218 22P C214 22P 1.3K C216 10u50 C227 47P TP4 TP1 R281 24K R283 R228 TP9 R206 C204 220P 22K R227 30K R205 22K 220P C203 R201 11K L R203 22K C201 10u50 100100 100u63 R208 1K 1K R224 R207 1K 1K R223 C226 470P 470

35、PC223 C225 C207 C205 4700P C263 47u25 R211 R209 100 R263 1K 220P C211 220P 1.5K R221 6.2K R219 6.2K R225 C213 22P C217 22P 1.3K C215 10u50 470 VR5 10P R213 22K C209 R289 100 C C2 R234 100 10 C222C220 10 R236 100 100 R2 R235 C221 C 10 C219 100P R105 10K 0.01 GND +B 1 2 +B2 GND1 RR+21 RR-43 RL- 65 87

36、RL+109 100K10u50 2.2K R121 C620 0.01 FR+ 2 R217 R241 10K 150 R215 R239 150 4.7K 33 R251 4.7K 100K 10u50 2.2K R120 FL- TP12 FR- TP14 R128C111 C112 10u50 R129 100K 4 8 TP11 FL+ TP13 10u50 C110 100K R127 10 C109R122 TP18 1000P C124 TP6 0.01 TP8 R102 1K C102 1000P TP7 C101 R101 1K R104 C104 10u50 10K R1

37、14 C106 15P TP17 R106 10K R103 10K C103 10u50 C114 15P R124 10K C134 100P 7 10 2 8 4 R110 10K 5 4 R112 2 3 1 R108 12K TP20 10K 1K R100 C140 1000P C132 100P R126 10K 6 TP22 8 0.01 0.01 C36 C34 C698 TP16 10K C105 15P R113 4.7K TP15 TP21 2 12K R107 R111 10K 3 TP19 1 R109 7 R125 10K 6 R123 10K C133 100P

38、 C113 15P C131 4 58 100 C2 R233 10u50 C120 C116 C611 3 R636 18K 10u50 1 2 R153 10u50 C135 20K C115 R152 20K TP29 TP51 C50 10K R691 10u50 2.2K R50 R58 10u50 C51 10K 0.047 C52 1 2 1 2 FAN+BFAN+B +1 +B +15V +15V 15V +15V + +B 100 R169 100 R168 100 R170 100 R171 C149 4700P4700P C150 15V1 R59 100K 4.7K R

39、61 10K R60 1K R62 TP78 TP79 TP10 TP5 TP2 + + + + + + + + + + + + + + + + + 1 1 2 2 22 2 3 3 3 3 3 4 7 KAC-7204 JIHGF X09-8760-10 (2/3) -13.6V -13.6V -47.3V 10.0V 15.0V +-B=47.3V(BATT=14.4V) 52.6V(BATT=16V) 15.0V -15.0V 15.0V 10.1V 13.4V -2.1V 1.7V 5.0V 4.3V14.2V ATT2=-1.5dB ATT1=-1.5dB 15.0V 2.8V 2.

40、8V 1.6V -15.0V 47.3V -47.3V 47.3V Q223 D206 Q220 D204 Q256 Q258 Q224 Q216 Q218 Q222 Q225 D205 D255 Q252 Q255 Q254 Q226 Q257 Q217 Q215 Q229 D615 Q615 Q617 Q616 Q618 POP Q2 D614 Q611 Q610 Q612 Q613 D613 Q614 HPF (2/2) (1/2) D203 Q251 Q253 Q227 HPF 12dB/OCT,F=VR CONT (50-200Hz) (2/2) IC7 IC8 INVERTER R

41、ch : PHASE (2/2) HPF/OFF /LPF D4 Q17 D3 Q16 Q1 D6 Q4 D5 Q3 IC11 B.B 0+18d (2/2) LPF 50-200Hz 24dB/OCT IC12 (1/2) IC7 S6 LPF (2/2) IC8 INPUT SENS. (1/2) IC12 IC10 D603 D699 Q602 D602 D604 D605 Q605 Q609 D608 D617D600 D601 D609 Q603 Q698 Q12 Q14 Q604 Q6Q8 Q11 Q10 D10 Q7Q5 Q9 IC6 (2/2) Q13 D612 D616 D7

42、 D9 (1/2) IC6 D610 Q15 NOISE MUTE THERMAL ATT DC/DC POWER AMP LATCH FAN+B P-CMUTE S 2.2 R51 R622 2.2K 100P 2.2C232 R243 2W C233 R234 100 100PR278 2.2 2.2 C222 1000P C220 1000P R230 5.1K R238 3.6K 100P 3.6K R232 5.1K R272 R262 470 R250 R246 0.1 2W R282 0.1 R248 470 0.1 2W R276 2.2 R258 0.1 2W R236 10

43、0 100 R202 10 R235 R274 R231 5.1K C221 1000P C231 100P R249 3.6K R229 C219 1000P R271 R261 470 5.1K R237 3.6K R247 R257 R277 R279 2.2 2.2 0.1 2W 0.1 2W 2W 0.1 R245 470 R155 0.1 2W C608 100u10 R668 R666 2 R663 10K 47 36K R660 R664 43K 47K R667 1 R665 36K 47 R662 10K R621 47K TP39 R661 TP46 R659 5.6K

44、TP45 C699 47K C616 0.1 1u50 R658 43K 10 C607 0.01 R617 R620 47K C606 100u10 12K R629 10K R630 47K TP40 C613 0.01 C609 0.01 R634 2.2K TP50 R633 6.2K C617 0.01 R632 12K TP49 R635 10K R631 12K TP44 C610 0.01 R149 C121 0.1 R119 9.1K TP32 100 C230 R233R273 2.2 R275 2.2 1 0.22C10810u50 85ISO-L 0.01 C120 8

45、.2K 0.1 R1304 6 7 10u50 2 C116 R116 47K TP31 56K9.1K C118 R118R132 GND R115 47K 13 C126 0.01 TP35 R134 C122 47K VR1 50K(C) 7 4 5 8 9 6 R131 56K R133 47K C147 0.01 4 TP75 C128 15P R138 62K 5 R136 4 2 3 5 4 R135 430 R137 430 1 7 10K 85 6 C148 0.01 10K 9 7 8 R141 R143 10K 56K R600 22K C611 C615 10u50 R

46、636 18K 10u50 C5 47u25 C612 10u50 R638 22K R72 2.2 C3 47u25 R2 R4 R74 100 C4 47u25 100 10K R602 R71 R639 C2 47u25 10K 2.2 R3 R73 R1 10 3300u63 R7 10 1/2W 3300u63 1000P 16K C7 R8 10 1/2W 33K R6 33K C9 R5 C6 C8 1000P 3900u16 C18 2200P R12 47 C11 3900u16 R30 10 1/2W C10 R11 47 16K L3 R142 C130 0.1 R140

47、 150K 6 5 R147 150K 6 5 TP47 10 0.033 R154R157 R153 R117 8.2K 10u50 ISO-R C117C107 0.10.22 TP30 C135 0.15 20K C115 R152 20K 10K 2 3 180K 1 10u50 2 3 1 C119 TP36 R158 7.5K C139 R156 TP29 10KC137 3 6 1 5 2 4 VR2 50K(C) 9 8 7 0.033 R160 7 9 8 6 3 2 6 5 6 0.15 R161 100K 9.1K 4 7 8 10u50 C143 VR3 10K(A)

48、R139 620 R145 2 3 1 47K R163 C145 0.01 C141 R162 7.5K 0.01 C146 R606R607 10 R692 33u35 C601 R693 10K C621 0.01 R603 R699 18K R608 18K R609 33K 100 R604 10K C602 10u50 10K4.7K C600 0.01 C604 10u50 C605 10u50 R640 R625 620 R619 4.7 1.5K R627 1K 680 22K R605 33K R694 R695 10K R626 R643R624 10u50 10u50

49、R21 10K R35 10K C15 47u25 C13 8.2K R18 4.7K R55 47 R57 47 R14 47 R10 R54 47 R9 4.7K R56 47 R13 47 TP71 TP66R16 1.5K TP70 R15 1.5K TP68 R646 3K 220K 7 6 5 TH601 TH602 TH605 C614 0.01 TP73 R648 4.7K 4.3K R696 200 R19 10K TP88 1000 10u C1 C14 R22 100K 0.1 R2 20K C1 R17 33K R34 150 R27 1K R23 10K 10u50 R20 330K R26 R25 6.8K TP83 10u50 C58 C57 R649 8 1 4 3 2 R647 220K R52 2.2 R652 4.3K 2.7K R651 4.7K C24 R656 3.9K R653 4.3K R618 4.3K R53 R650 100K 1K FAN+B FAN+B SW14.1V SW14.1V SW14.1V B14.4V B14.4V B14.4V +15V +B B +15V+15V +15V -15V +15V -15V +B +B +B +B 15V15V 15V 15