Kenwood-KACX-520-Service-Manual 电路图 维修手册.pdf

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1、POWER AMPLIFIER KAC-PS520/X520 SERVICE MANUAL 2002-3 PRINTED IN KOREA B51-7934-00 (K) 3547 30 30 ONOFF INFRASONICFILTER LPF OFF HPF B.M.S. +12dB OFF REMOTE OPERATION MONO(L ch)STEREO GND LINE OUTEXT.AMP.CONT.LINE IN L R L R LEFT BRIDGED SPEAKER OUTPUTRIGHT POWER IN P.CONBATT.GND FUSE(30Ax2) RadioFan

2、s.CN 收音机爱 好者资料库 KAC-PS520/X520 2 MICROCOMPUTERS TERMINAL DESCRIPTION (X09-) IC11 : u-COM PORT No. PORT NAMEI/OFUNCTIONOPERATING CONDITION 1 +5V SW OControls small-amount current.L : SW 5V on. 2- - 3 FANOControls fan rotation. H : Fan on. 4- - 5 D VOLTAGE IDetects class-D over-voltage. L : Over-volta

3、ge detection. 6V DOWNI Detects momentary power down.H : Momentary power-down detection. 7 D CURRENT IDetects class-D over-current. L (Class-D power on) : Over-current detection. 8 AB VOLTAGE IDetects class-AB over-voltage. L : Over-voltage detection. 9 AB CURRENTIDetects class-AB over-current. H : O

4、ver-current detection. 10BLUEOControls BLUE of variable illumination. H : Illumination on. 11 GREENOControls GREEN of variable illumination. H : Illumination on. 12REDOControls RED of variable illumination. H : Illumination on. 13 TEST- - 14 RESET -Resets. L : Reset. 15 XIN- - 16XOUT- - 17 VSS- - 18

5、VAREF-A/D reference. - 19 ADIN 1IDetects temperature. H : Unusual temperature detection. 20ADIN 2IDetects temperature. H : Unusual temperature detection. 21 ADIN 3IDetects temperature. H : Unusual temperature detection. 22ADIN 4IDetects temperature. H : Unusual temperature detection. 23 - - 24BASS 1

6、2dBIStabilizes BMS +12dB. H : BMS +12dB stabilization. 25 BASS REMOIBeing remote-controlled from BMS head unit. H : remote control available. 26BASS OFFIReleases boost. H : Boost off. 27 D POWEROControls class-D amplifier. H : Class-D amplifier on. 28,29- - 30 POWEROControls power amplifier. H : SW

7、14.4V on. 31 COM HUIMeasures the head unit pulse. - 32 OFFSET CONOControls bass boost frequency offset. H : Offset on. 33 BASS CON AOControls bass boost frequency offset. - 34 BASS CON BOControls bass boost frequency offset. - 35,36 - - 37 STAND-BY ICancels stop mode by P.CON on. L : P.CON on or BAC

8、K-UP over-voltage detection. 38,39 - - 40 VDD-VDD. - 41 TACT SWISwitches color. H : SW on. 42 MUTE 2 OControls driver stages. L : Mute on. 43 MUTE 1 OControls amplifier input mute. L : Mute on. 44 - - RadioFans.CN 收音机爱 好者资料库 KAC-PS520/X520 3 ADJUSTMENT (KAC-PS520/X520) No.ITEM INPUT SETTINGS OUTPUT

9、SETTINGS RECEIVER SETTINGS ALIGNMENT POINTS ALIGN FOR FIG. Connect a cassette receiver or other receiver. 1 IDEL CURRENT - Connect a DC voltmeter between emitter terminals of Q35/Q36 (L/R) and J2 (SP.OUT, L+/R-). VOLUME : 0 VR1 (L ch) VR2 (R ch) (X09-) 2.5mV(a) RadioFans.CN 收音机爱 好者资料库 KAC-PS520/X520

10、 4 ADJUSTMENT (L) VR1 (R) VR2 J2 DC Voltmeter (a)2.5mV DC Voltmeter (a)2.5mV L Q35 Q36 R 5 ACEBD 2 1 3 5 7 4 6 Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD Component side view Foil side view CN1CN2CN3 S1 X08-4090-10 (J74-1362-11) X08-4090-10 (J74-1362-11) CN1 S1

11、 CN2CN3 VR1 VR2VR3 LPF BMSSENS VR4 BRF(X810D) HPF(X520) 161166 VR2 VR1 BMSSENS 16 VR3 LPF HPF(X520) BRF(X810D) VR4 1166 2 FHJLNGIKMO 1 3 5 7 4 6 D45 X09 B/2 J2 Q78Q76 Q79 Q77Q75 (J74-1351-11) X09-5430-10 A/2 S4 OFFREMOTE+12dB B.M.S. S2 OFF FILTER HPFLPF S1 D2 P2 P1 S3 ONOFF INFRASONIC FUSE (30Ax2) B

12、ATT.GND POWER IN P. CON LEFTRIGHT SPEAKER OUTPUT Q80 WH1 Q44 WH2 D54 D53 CN3 D57 D55 D67 D50 Q82 Q33 Q61 Q67 WH3 D4 D8 D6 D3 D7 D5 D1 D9 Q68 D60 D56 Q60 Q72 Q74 Q71 Q73 D59 D49 Q69 Q63 Q62 Q64 D47 Q65 Q66 Q45 D43 D66 Q53 Q81 D10 J1 Q32 Q10 D18 D16 D46 Q12 Q4 Q34 Q2 Q20 Q19 Q40 J3 D51 D52 Q6 Q14 Q18

13、D14 Q8 D40 Q30 Q26 D32 Q24 D38 Q28 Q22 D34 D26 D36 D20 D30 D22 Q16 D24 D27 D35 D39 D31 D33 D25 D37 Q31 Q29 Q23 Q27 Q25 Q21 D44 Q5 Q13 Q7 Q17 Q15 Q46 Q47 Q43 Q9 Q11 Q1 Q3 D19 D48 D65 D29 D23 D21 D17 D13 D15 D11D12 Q37 CN4 D28 Q38 CN2 CN1 Q48 Q49 Q85 D58 Q86 Q36 Q35Q39 W9 W8 W425 W143 W410 W131 W142 W

14、161 W162 W209 W371 W324 W237 W245 W389 W388 W298 W390 W391 W380 W379 W378 W377 W366 W360 W367 W361 W411 W420 W381 W165 W221 W172 W362 W382 W358 W339 W338 W349 W350 W342 W328 W329 W337 W336 W334 W335 W355 W313 W401 W416 W413 W421 W383 W394 W409 W417 W414 W400 W244 W402 W370 W368 W145 W104 W108 W123 W

15、150 W151 W152 W125 W133 W168 W147 W130 W134 W135 W395 W140 W406 W164 W107 W116 W139 W128 W136 W255 W141 W384 W119 W144 W146 W156 W314 W239 W121 W120 W105 W404 W347 W385 W393 W398 W403 W407 W397 W408 W386 W422 W190 W405 W387 W363 W415 W166 W248 W348 W243 W263 W374 W159 W247 W256 W250 W200 W175 W369 W

16、399 W373 W372 W312 W356 W364 W357 W359 W365 W376 W353 W158 W236 W345 W344 W392 W396 W154 W148 W122 W110 W167 W103 W101 W113 W129 W153 W112 W173 W163 W176 W177 W351 W174 W169 W170 W155 W181 W160 W352 W419 W212 W315 W260 W208 W296 W206 W238 W242 W259 W198 W179 W194 W185 W219 W323 W224 W301 W215 W210 W

17、192 W183 W207 W187 W235 W295 W226 W294 W325 W267 W271W270 W277 W240 W279 W293 W252 W203 W264 W289 W311 W178 W182 W191W204 W217 W232 W230 EBEBE E BEB B W213 W186 W184 W205 W241W231 W218 W223 W281 W234 W214 W211 W273 W286 W274 W309 W180 W262 W275 W288 W276 W327 W278 W251 W283 W284 W285 W201 W196 W304

18、W265 W249 W290 W202 W318 W424 W423 W310 W297 W269 W261 W268 W225 W303 W322 W341 W321 W319 W299 W320 W246 W330 W333 W326 W195 W189 W188 W199 W197 W412 W257 W229 W354 W308 W305 W307 W291 W300 W253 W282 W227 TH3 W340 L1 C112 C111 W1 W149 C116 C115 W3 W7 W5 W343 W375 W346 W26 L5 C137 R4 C136 C9 R19 C4 R

19、207 W2 L3 R267 C91 R208 R268 C92 R241 TH1 R204 R205 R203 R214 R213 R209 R210 C113 C114 W6 C117 W4 C118 R201 R202 C107 R198 W109 C108 R200 R240 TH2 R145 R140 R144 C132 R225 R239 R206 R142R146 C10 R2 R1 R3 R6 C1 C3 C2 R40 C16 C93 C44 C119 C120 W126 R18 C37 C38 R70 C15 R227 R148 R147 R226 R224 R223 C13

20、0 L4 R230 R232 R242 C133 R243 R246 R245 R244 C134 R247 R228 R233 R237 R231 R229 R234 C131 W222 R236 W439 R235 R238 C129 C89 R163 R187 C42 R185 R159 C97 R160 R161 W331 C98 R184 R180 R179 R189 R273 R194 W118 L2 C105 C101R274 R190 C90 W10 S D GS D GS D GS D GS D GS D G C40 W292 R17 C39 R275 C60 C110 R2

21、0 R5 W111 R199 W115 C88 R84 C74 C144 W280 R92 C62 C135 R74 R76 R72 R90 C72 R162 R100 C94 C102 C66 R88 C70 R78 R80 C68 R86 C76C80 W332 R116 R138 C138 R134 R114 R108 R104 VR2 R102 R128 R126 C86 R136 R130 R120 R106 C82 R122 C84 R124 R132 R118 R110 R112 C64 R191 R96 R94 R264 R98 W102 C78 R82 R271 R133 R

22、135 R137 R129 R111R105 R109 R115 R113 R107 R141R143 R139 W272 C99 R276 R117 R101 R119 R103 R127 R123 R121 R125 C83 C81 C85 C73 R157 R156 R97 R263 R93 R95 R99 R85 R77 R79 R73 R75 R87 R83 R91 R151 R152 R153 R154 R155 C87 C63 C67 C75 C79 C77R158R81 R89 R71 C71 C69 C61 R69 X1 C148 VR1 C100 R164 R166 R16

23、5 R167 C139 R131 C65 R173 R33 R170 R169 R168 R149 R150 C96 R172 R171 R188 R34 C109 C103 R195 R197 R196 L6 C123 C122 C128 C127 C121 C124 C126 C125 R220 R219 R192 R193 R216 R215 R217 R265 W216 R212 R211 C26 C28 C25 C27 W117 W114 W124 W254 W127 R272 W440 W442 W443 W449 W447 W444 W452 W451 W445 W450 W44

24、6 W448W441 W458 W459 W453 W454 W455 W456 W460 W461 W438 W437 W436 W435 W434 W433 W429 W428 W427 W430 W426 W302 W432 W431 W287 W171 W157 W132 W220 W138 W462 C145 W418 W193 W316 W137 W106 C141 B B B E BE BE B BEBE BEBEBEBE EB E BE BE BE BE BE BE B B BE BE B E BE E BE E B EB E E E E EB B E E EB EB BE B

25、E BE B E E B B EB B BE BE EB EB BE BE BE BE BE EB B EB E 14 B E BE B BE E BE BEBE BE EB BE BE E BEE B B BE EB BE W25 R186 13 C143 C104 12 R175 C95 C106 34 144 11 R174 R222 54 W24 R221 18 169 33 12 2223 R218 R183 R176R182 R177 R178R181 C35 C55 R67 C53R65R63 1 C45 C51 R61 4 8 R47 C47 C33 R45 5 C49 R51

26、 R32 R30 R36 R28 R38 C52 R62 C48 R68 R49 C56 C54 R66 1 R64 4 8 C46 C34 R46 5 R48 R50 C36 C50 R52 W23 R312 C21 R27 R37 W22 R31 C22 R35 R25 9 5 16 8 4 1 W21 8 R255 1 C43 C41 R58 W18 C57 C58 R59 R262 W17 R56 R55 R57 C59 1 R60 R43 8 R258 W19W20 C140 R54 R53 R260 1 4 R256 4 8 5 5 R14 C12 R12 R41 C31 C23

27、R23 R21 1 1 18 61 14 6 4 R29 R44 R39 C24 58 R22 R24 C29 C30 C20 R16 R266 R26 W16 R42 C32 W15 C14 R253 R254 R250 R251 R252 R249 R248 R8 W13 R11 C18 R10 C6 R270 R13R15 W12 8 5 14 W14 C147 C8 C146 R9 C17 C19 1 C13C11 4 85 R269 C5C7 R7 W11 IC11 Q84 D64 Q83 D63 D61 IC12 IC10 D62 Q52 Q50Q51 IC6 Q41 IC7 Q4

28、2 IC9 IC8 IC4 IC5 STEREOMONO OPERATION LINE INLINE OUT EXT. AMP. CONT. IC3 Q70 IC2 D68 D69 IC1 Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD(Foil side view) 67 X09-5430-10 A/2 (J74-1351-11) REF.NO.IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 IC11 IC12 ADDRESS 2N3N3N4

29、N4N6N5N5N5N6J6I4H X09-5430-10 A/2 (J74-1351-11) REF.NO.Q1Q2Q3Q4Q5Q7Q8Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 Q25 Q26 Q27 Q28 Q29 Q30 Q31 Q32 Q33 Q34 Q35 Q36 Q37 Q38 Q39 Q40 Q41 ADDRESS 3M5M3L5L3L3L5L3L5L3L5L3L5L3K5K3L5L2L6L2M5M2L6L2M5M2M5M2L5L2K5K2M6L2L6M2M6M2K6K5N REF.NO.Q42

30、Q43 Q44 Q45 Q46 Q47 Q48 Q49 Q50 Q51 Q52 Q53 Q60 Q61 Q62 Q63 Q64 Q65 Q66 Q67 Q68 Q69 Q70 Q71 Q72 Q73 Q74 Q75 Q76 Q77 Q78 Q79 Q80 Q81 Q82 Q83 Q84 Q85 Q86 ADDRESS5N3K3K3M3K3K2K2K3L3L4L6I4G4G6H6G6H6H6H6G6G6G3M4H4G4H4G2G2H2G2I2H2I6J6J6J6J6K6J ABDFHJCEGI 2 1 3 5 7 4 6 Q1 Q2 Q4 Q12 Q14 Q18 Q22 Q24 Q23 Q15

31、Q3 Q21 Q13 Q11 Q17 Q7 Q5 Q8 Q6 S1 Q9 Q10 Q16 Q20 Q19 Q27 Q25 Q26 Q28 Q32 Q30 Q31 Q29 P2 D68 D69 Q37 Q33 Q38 Q36 Q40 Q34 Q39 Q35 D1 D5 D33 D37 D35 D23 D25 D13 D17D15 D21 D4 D8 D19 D20 D11D12 D27 D29 D31 D39 D40 D30 D28 D32 D38 D26 D24 D36 D22 D18D16 D14 (1/2) IC1(2/2) (1/2) IC2(2/2) IC3 IC3(2/2) IC5(

32、1/2) IC7(1/2) IC4(2/2) (1/2) IC6 WH3WH2 J1 D3 D7 IC1 IC2 D6 D2 ISOLATION AMPLIFIER WH1 (1/2) BASS BOOST BOOST BASS IC4 HPF LPF BASS BOOST HPF (1/2) MUTE INPUT AMPLIFIER DIFFERENTIAL CASCADE STAGE CURRENT CONSTANT CIRCUIT DIFFERENTIAL AMPLIFIER INPUT 2ND AMPLIFIER DIFFERENTIAL MUTE D34 CURRENT MIRROR

33、 TEMPERATURE COMPENSATOR OVER-CURRENT DETECTOR POWER AMPLIFIER DRIVER POWER STAGE DIFFERENTIAL AMPLIFIER INPUT STAGE CASCADE CIRCUIT CONSTANT CURRENT DIFFERENTIAL AMPLIFIER INPUT MIRROR CURRENT TEMPERATURE COMPENSATOR DETECTOR OVER-CURRENT POWER AMPLIFIER DRIVER STAGE POWER OVER-CURRENT DETECTOR OFF

34、SET D9 D10 BOOST BASS SWITCHING Q42 OFFSET FREQUENCY FREQUENCY Q41 IC1,2,4,5: NJM5532MD IC3,6,7: NJM4565M IC8: TC4052BF(N) IC10: PST9130NR IC11: TMP87C847U3JV4 IC12: UPC494GS Q1,2,21,22: 2SC1845(F,E) Q3-8,11,12,23,24,45 : 2SA992(F,E) Q9,10,43,65,73,74 : 2SA733(A)(Q,P) Q13,14,17,18: 2SC2631(R,S) Q15,

35、16: 2SA1123(Q,R) Q19,20: 2SC4137(V,W) Q25-28: 2SC2235 Q29-32: 2SA965 Q33,36-38: 2SC3856LB Q34,35,39,40: 2SA1492LB Q41: DTA124EK Q42: DTC124EK Q44: DTA124ES Q46-49,61,64,66-69,71,72 : 2SC945(A)(Q,P) Q50-52,70,83: 2SC2412K Q53,62,63,85: 2SC3940A(R,S) Q60,86: 2SA1534A(R,S) Q75-80: IRFI1010N Q81: 2SD237

36、5 Q82: 2SB1548(P) Q84: 2SA1037K D1-8,11,12,17-40,44, 51-54,66: 1SS133 D9,10: RD8.2JS(B) D13-16,43: RD5.1JS(B) D45: B30-1582-05 D46: 6A20-M D47,65: RD6.2JS(B) D48: RD9.1JS(B) D49: RD15JS(B) D50: RD7.5JS(B) D55: FML22S D56: FML22R D57-60,67: FR103S D61,62: HZM20N(B) D63,64: HZM16N(B2) D68,69: MA3068WA

37、 B LINE B LINE GND LINE SIGNAL LINE 123 IDLE ADJ. ADJ. IDLE S1 CN3 CN2 CN1 INPUT SENS BASS BOOST LPF HPF 3 2 1 TC4W66FIC9: 5 5 A A C16 1K R1 0.01 C147 470P C1 1K 15P 0.01 C146 1K R2 10K R3 10K R9 10u16 C72 10u16 C3 + 130 R5 10u16 C4 + 10u16 C15 + 11K R21 4.7K 3.3u50 C25 2.2u50 C27 910K R35 220K R37

38、220 R23 0.1 C43 0.1 C33 8.2K R45 0.1 C47 47u25 C39 10u16 C37 + + 0.1 C45 9.1K R47 47u25 C44 + 56K R50 4.7 R135 4.7 R131 2W 0.1 R143 2W 0.1 R139 220 R129 1K R117 10 R111 1K R121 470P C83 470P C85 1K R123 2W 0.1 R141 2W 0.1 R145 1/2W 1K R119 220P C81 100 R105 220 VR1 1000P C77 100 R275 12K R89 6.8K R9

39、3 6.8K R95 1.8K R101 C73 22P 13K R91 510 R103 12P C79 1K R87 100P C137 47u25 C69 4700P C67 100 R79 47K R81 330P C75 1u50 C65 2.4K R83 10u16 C71 150 R263 150 R97 330P C141 0.1 C18 0.1 C20 15P C12 10K R10 15P C10 10K R12 10u16 C16 + 10K R15 0.1 C17 0.1 C57 12K R55 150K R56 120K R57 6.8K R58 22K R52 0.

40、22 C36 8.2K R46 47u25 C40 10u16 C38 9.1K R48 + + 0.1 0.1 C34 0.1 C46 15K R44 910K R38 2.2u50 C28 3.3u50 C26 220 R24 11K R22 0.1 C29 0.1 C30 1K R270 8.2K R69 47u25 C61 + 1K R71 1K R85 1K R77 150 R99 470u50 + C94 150 R100 10 1/2W R163 1K R86 1K R72 47K R82 100 R80 4700P C68 100P C138 R88 13K R92 22P C

41、74 10 R115 220P C87 100 R107 4.7 R133 4.7 R137 1/2W 1.8K R127 100 R108 220P C88 470P C86 1K R124 1.8K R128 1K R120 10 R114 10 R116 4.7 R134 4.7 R138 2W 0.1 R142 2W 0.1 R146 2W 0.1 R140 2W 0.1 R144 1.8K R126 1K R122 470P C84 47u25 C70 + 510 R104 12P C80 330P C76 100 R276 1000P C78 12K R90 6.8K R94 6.

42、8K R96 1.8K R102 220 VR2 47u25 C62 8.2K R70 1u50 C66 + 2.4K R84 150 R264 150 R98 220P C82 100 R106 10 R110 R112 10 4.7 R132 220 R130 1K R118 4.7 R136 2.2u50 C100 47K 4.7K R18 22u16 C136 10 R109 5 6 8 4 73 2 1 2 3 8 4 15 6 7 2 3 1 6 5 7 6 5 8 4 7 7 6 5 4 8 1 3 2 5 6 8 4 7 4 8 5 6 7 NC FIL. G 65 HP L

43、FIL. G HP R HP R 2431654321 TACT SW5V LP 3 LP 3 LP 2 LP 1 R269 C5 R7 3.6K C7 22P C9 15P R11 10K R13 10K C13 15P C11 15P 0.1 C19 C2 470P R4 10K C93 1000P 1K C8 22P R8 3.6K R6 130 C6 15P R14 10K C14 15P R265 10K R16 22K R266 IC1,2 12 IS GND B.B. L 5 SENS 3 B.B. R 4 SENS L 6 SENS R C23 0.47 + C24 0.47

44、15K R43 R41 5.6K C31 100P 0.22 C35 R39 C58 0.1 R59 4.7K10K R60 C32 100P R42 5.6K C59 0.047 R40 C48 R17 8 4 22K R54 C41 0.1 R49 56K 1K R78 1K Q13,14,17,18 Q21,23 Q25,27,29,31 R113 10 R125 1.8K Q33,35,37,39 Q19 Q20 Q22,24 Q26,28,30,32 Q34,36,38,40 Q45 3.9K 6 5 1 2 3.9K 3 R75 13KR76 13K C64 220PC63 220

45、P R74 5.1KR73 5.1K Q4 Q3 13 I/O2 O/I2 CONT1 VDD B A X3 X0 XCOM X1 X2 VDD C21 5 R32 2K R28 470 R20 1.2K R26 4.3K R30 15 0.1 C22 0.1 Y0 1 Y3 YCOM Y2 4 3 2 VSS VEE INH Y1 8 7 6 CONT2 3 O/I1 I/O1 2 1 VSS 4 R312 100K R19 1.2K R25 470 R29 4.3K R27 2K 15 16 12 13 14 R31 15 9R34 1K 10 11 R33 1K 33 34 6 7 8

46、5 13 2 3 6 5 C90 0.047R148 10R147 10C89 0.047 R150 47KR149 47K 1 + R164 32 Q43 Q45 Q47 SW5V B +B + + + + +B +B +B BB B +B +B B B +B B + B +B B +B B B +B B +B +B +B +B B B +B +B +B B +B +B B +B +B B B +B +B +B +B +B +B VR1 VR2 VR3 VR4 3 1 2 4 6 5 2 1 5 3 4 5 6 6 2 3 4 1 R36 220K GND SW 22K 22K 22K 22

47、K -15.4V 15.4V 15.4V 15.4V-15.4V 15.4V -15.4V15.4V -15.4V -15.4V 15.4V -15.4V -8.2V -8.2V 5V 0V -8.2V 8.2V 8.2V 8.2V IC8 IC9 (X09-5430-10) (A/2)(X08-4090-10) PREAMPLIFIER UNITAUDIO UNIT TKMOQSLNPR KAC-PS520/X520 Q60 Q62 Q63 Q65 Q50 Q51 Q52 Q70 Q45 Q53 Q80Q78Q76 Q79Q77Q75 Q43 Q47 S3 Q46 Q49 Q48 Q69 Q

48、68 Q67 Q64 Q61 Q72 Q71 Q73 Q74 Q66 D56 P1 D45 D55 Q44 S2 S4 D67 D54 D48 D47 D66 D57 D59 D58 D60 D53 D44 D43 D49 D50 D46 D65 D52 IC6(2/2) IC7(2/2) IC5(2/2) INFRASONIC FILTER INVERTER INPUT SIDE VOLTAGE-DOWN MOMENTARY DETECTOR SWITCHING POWER STAGE SWITCHING DRIVER SWITCHING REGULATOR CN3 J2 CN4 15 (F

49、AN) SP OUT FAN SWITCHING INPUT SIDE VOLTAGE-DOWN OVER- DETECTOR SWITCHING 5V 5V AVR 14.4V SWITCHING P. CON DETECTOR J3 AMP CON D51 COMMUNICATION DETECTOR u-COM SWITCHING LED SP. DC DETECTOR OFFSET MUTE MUTE RESET IC Q84 Q86 Q82 D64 D63 Q85 AVR D62 D61 Q81 Q83 CN2 CN1 (F07-1751-05) L6 X1 4.19MHz 22K R53 22K R51 22K R255 10u16 C60 22K R262 10K R260 10K R256 47P C140 13K R68 13K R67 200K R65 200K R66 0.22 C54 0.22 C52 4.7K R62 2.2 C50 4.7K R61 2.2 C49 0.22 C51 0.22 C53 R63 13K 2.2 C55 5.1K R258 1/2W 10 R179 1/2W 10 R267 0.047 C91 0.047 C92 10 1/2W R268 10 1/2W R180 33 R