Kenwood-KCAR-42-FM-Service-Manual 电路图 维修手册.pdf
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1、FM MODULATOR KCA-R42FM 2000-12 PRINTED IN JAPAN B51-7708-00(S) 1744 (K, M type) SERVICE MANUAL Antenna cord assy (E30-4310-08) CASE (A01-2695-08) Holder assy (B07-2138-08) Magic tape assy (W01-0763-08) Display unit assy (T95-0244-08) Remote controller assy (A70-0896-05) Battery Not supplied as servi
2、ce parts DC cord assy (E30-4733-08) RadioFans.CN 收音机爱 好者资料库 KCA-R42FM 2 BLOCK DIAGRAM ACC BATT GND DETECTION ACC (+5V) AVR LC72329 u-COM IC2 IC1 CN101 DRIVER RESET CN102 MODE 1,2 Q308 CD-CH 13P IC101 ISOLATION AMP.L.P.F. 2nd. IC102 EMPHASIS IC301 MODULATOR FM-St. Q306, STAGE RF Q304,305 LEVEL CONTRO
3、L AUDIO MUTE Q309 ALC DETECTION IC302 AMP Q101,201 DRIVER ALC CN103 IC4 AVR(+5.6V) RIPPLE FILTER 307 RL1 CN105 RADIO To CN104 ANT IN Q1,6 Q4,5 Q310 MODE 1,2 VDD HOLD CH-CONTROL P ON MIX MPX +V(AUDIO) +V(RF STAGE) PLL SIGNAL (L/R) 63 31 67 12-172661 29,30,60 74,77 PILOT KCA-R42FM RadioFans.CN 收音机爱 好者
4、资料库 KCA-R42FM 3 COMPONENT DESCRIPTION GDISPLAY UNIT IC1LC75852WLCD driver with key-matrix IC2PNA4602MRemote control light senser Q1DTC144EK LED on / off sw Q2DTB123YK Q3DTA144EKkey-matrix permition swready on key-matrix Q4DTC144EK IC2 on / off sw Q5DTA114EK Ref No.Component NameAppication / Function
5、Operation / Condition / Compatibility GRF MODULATOR UNIT IC1UPC7805AHFBU 5V AVR IC2LC72329-9274System MI-COM. IC4NJM78L05UA5V AVR IC101NJM2060MIsolation amp. IC102NJM4565MDLow pass filter IC301BA1405FFM ST modulator IC302NJM4565MD1/2 Vcc driver, ALC detection amp Q1DTC124EKACC detection Q22SA1782(T,
6、U) Q3DTC124EK Power sw Q4DTC143TKReset sw Q5DTC143TKCH-Reset sw Q6DTA124EKHold detection sw Q8DTC143TKRelay driver Q92SC4640(T,U)Ripple filter Q1012SK2158 ALC control sw Q2012SK2158 Q3032SA1162(GR)Pilot mix amp Q304 2SK2158Level control sw Level 1/2:L, Level 3/4:H Q305Level 2/4:L, Level 1/3:H Q3062S
7、K508LRF oscillator buffer Q3072SC2714(Y)RF amp. Q3082SK2158Mode (1/2) swMode1:H, Mode2:L Q3092SK2158Audio mutePower on:L, Power off:H Q3102SK2158Mode (1/2) swMode1:L, Mode2:H Ref No.Component NameAppication / FunctionOperation / Condition / Compatibility RadioFans.CN 收音机爱 好者资料库 KCA-R42FM 4 ADJUSTMEN
8、T G RF MODULATOR UNIT 1. DC balance adjustment (VR301) While observing the waveform with a oscilloscope at pin 13 of IC301, adjust VR301 to minimize the waveform level. 2. PLL control voltage adjustment (VC301) First set the transmission frequency to *87.9 MHz with the commander, then adjust VC301 s
9、o that the DC Voltage at the + pole of C317, measured using a multimeter or digital tester, is + 3V ( 0.1 V). 3. Modulation level adjustment (VR303) The method using a standard receiver or tuner. Adjust VR303 so that the output level from the standard receiver or tuner is as specified. 56 ABCEDFGIH
10、1 2 3 4 5 6 7 PC BOARD (Component Side View)PC BOARD (Foil Side View) D1 D4 D2 D5 D3 Q4 Q3 Q5 IC1 C2 R3 C5 C4 R17 R1 R2 R5 R4 R16 R6 116 32 3348 49 64 17 B E E B E B LED11 SW2 SW1SW5SW9SW7 SW4 POEWR RESET LED12LED13 LED14 LED10 LED9 LED8 LED7 LED6 LED5 LED4 LED3 LED2 LED1 LED15 LED16 SW8 SW6RDM SW3R
11、EP LED17 LED18 Q1 CN1 IC2 Q2 R12 C1 3 1 1 9 C3 R13 R9R10R11 R15 R14 R8R7 EB E B D1 D4 D2 D5 D3 Q4 Q3 Q5 IC1 C2 R3 C5 C4 R17R1 R2 R5 R4 R16 R6 116 32 3348 49 64 17 BE EB EB LED11 SW2 SW1SW5SW9SW7 SW4 POEWR RESET LED12LED13 LED14 LED10 LED9 LED8 LED7 LED6 LED5 LED4 LED3 LED2 LED1 LED15 LED16 SW8 SW6RD
12、M SW3REP LED17 LED18 Q1 CN1 IC2 Q2 R12 C1 3 1 1 9 C3 R13 R9R10R11 R15 R14 R8R7 EB EB Q4 Q5 Q1 Q3 IC101 IC301 IC2 IC302 Q303 IC102 Q101 Q309 D302 Q306 Q8 IC4 Q6 D101 D201 Q308 Q201 Q310 Q304 Q305 Q307 R316 C336 B E B E B E E B E B B E E B E B I O S G 1 80 65 64 24 25 4041 19 18 10 14 85 14 85 1 7 148
13、 C13 C15 C17 C16 C8 C14 R202 R207 R204 R205 R203 R102 R103 C103 R106 R108 R114 R214 C212 R215 R109 R112 C305 C302 C10 R18 C9 R31 R6 C310 C312 R308 R327 C332 R326 VD301 C319 C323 C327 C322 R332 C329 C331 L304 L302 L301 R335 C333 R34 C35 C334 C320 C304 R35 C108 C209 R210 C110R113 C109 R314 R328 R115 C
14、112 C203 R206 R213 R216 R209 R212 C208 R213 R318 C11 C12 R33 R320 R27 R28 R337 C318 R325 C338 C324 R330 C325 C328 R331 C330 L305 L303 R334 R323 C316 R333 R338 C 2 R329 R346 R317 R348 C306 R301 C308 R307 R306 R302 C210 R340 R339 R110 R111C207 C107 R343 C214 R105 R104 R107 R208 C113 R116 C114 G D S G
15、D S G D S G D S G D S G D S G D D S G + + + + + + + + + + + + + + + + + + + + + + + + + + R20 R22 ZD4 R17 R21 R15 R16 R19 ZD7 ZD6 ZD5 ZD2 ZD3 R26 R24 R25 J15 J13 J57 J10 R11 R13 R14 J4 J16 J19 J20 J22 J23 J11 J21 J54 J56 J1 J3 J8 J9 J24 J25 J26 J27 J36 J55 J6 WT W2 W1RD R12 R23 VR301 X301 BRK1 3 1 2
16、 5 6 4 7 8 1234 5678 9101112 13 CN101 CN102 C205 C204 C206 C106 C314 C111 C32 C211 X302 C31 C34 C105 C104 C301 J45 J28 J29 J30 J31 J37 J41 I G O J52 J53 J32 J33 J35 R8 ZD1 R319 R322 R9 C20 R7 C6 C3 C7 R1 C335 VR303 C317 C19 J50 J51 J44 J43 J42 J38 J39 J40 J49 J48 J47 J46 C315 C326 CN104 CN105 C30 RL
17、1 1 2 1 2 L1 C24 C33 CN1 P2 R2 ACC GND BATT C1 C321 VC301 W6 W9 W4 W5 W2 W8 W2 W1 B E B E D16 Q9 Q2 D5 IC1 D14 D2 D1 D13 D12 D8 D15 D9 DISP INPUT CD-CH INPUT TO RADIO ANT IN Q4 Q5 Q1 Q3 IC101 IC301 IC2 IC302 Q303 IC102 Q101 Q309 D302 Q306 Q8 IC4 Q6 D101 D201 Q308 Q201 Q310Q304 Q305 Q307 B E B E B E
18、B E B E B E E B E B I O G S G S 1 80 65 64 24 25 4041 1 9 18 10 14 85 14 85 17 148 C13 C15 C17 C16 C8 C14 R202 R207 R204 R205 R203 R102 R103 C103 R106 R108 R114 R214 C212 R215 R109 R112 C305 C302 C10 R18 C9 R31 R6 C310 C312 R308 R327 C332 R326 VD301 C319 C323 C327 C322 R332 C329 C331 L304 L302 L301
19、R335 C333 R34 C35 C334 C320 R316 C336 C304 R35 C108 C209 R210 C110 R113 C109 R314 R328 R115 C112 C203 R206 R213 R216 R209 R212 C208 R213 R318 C11 C12 R33 R320 R27 R28 R337 C318 R325 C338 C324 R330 C325 C328 R331 C330 L305 L303 R334 R323 C316 R333 R338 C2 R329 R346 R317 R348 C306 R301 C308 R307 R306
20、R302 C210 R340 R339 R110 R111 C207 C107 R343 C214 R105 R104 R107 R208 C113 R116 C114 G D D S G D G S G S G S D D D S G D D S G + + + + + + + + + + + + + + + + + + + + + + + + + + R14 R22 ZD4 R17 R21 R20 R15 R16 R19 ZD7 ZD6 ZD5 ZD2 ZD3 R26 R24 R25 J15 J13 J57 J10 R11 R13 J4 J16 J19 J20 J22 J23 J11 J2
21、1 J54 J56 J1 J3 J8 J9 J24 J25 J26 J55 J6 WT W2 W1RD R12 R23 BRK1 5 2 1 3 8 7 4 6 1234 56 78 9101112 13 CN101 CN102 C205 C204 C206 C106 C314 C111 C32 C211 X302 C34 C105 C104 C301 J45 J27 J28 J29 J30 J31 J36 J37 J41 O G I J52 J53 J32 J33 J35 R8 ZD1 R319 VR301 X301 R322 R9 C20 R7 C6 C3 C7 R1 C335 VR303
22、 C31 C317 C19 J50 J51 J44 J43 J42 J38 J39 J40 J49 J48 J47 J46 C315 C326 CN104 CN105 C30 RL1 1 2 1 2 L1 C24 C33 CN1 P2 R2 ACC GND BATT C1 C321 VC301 W6 W9 W4 W5 W2 W8 W2 W1 E B E B D16 Q9 Q2 D5 IC1 D14 D2 D1 D13 D12 D8 D15 D9 DISP INPUT CD-CH INPUT TO RADIO ANT IN RF MODULATORRF MODULATOR DISPLAY UNI
23、TDISPLAY UNIT RF MODULATOR .ON . f eR sserddA CIQ 1C4 2C3 4C5 101B2 201B2 103B3 203B4 1C5 2C4 3C4 4D3 5D3 6D3 8C5 9C5 102B3 303B3 403B4 503B4 603B5 703B5 803B3 903C4 013B4 RF MODULATOR .ON . f eR sserddA CIQ 1F4 2F3 4F5 101G2 201G2 103G3 203G4 1E3 2F5 3E3 4F3 5F3 6F3 8F5 9F5 102G3 303G3 403G4 503G4
24、603G5 703G5 803G3 903G4 013G4 DISPLAY UNIT .ON . f eR sserddA CIQ 1C6 2B6 1B7 2B7 3B7 4B6 5B6 DISPLAY UNIT .ON . f eR sserddA CIQ 1F6 2G6 1G7 2G7 3G7 4G6 5G6 IHGEFDCAB 1 2 3 4 5 6 7KCA-R42FM 1/2 CN103 IC101 (1/4) IC101 (3/4) IC101 (4/4) IC101 (2/4) D101D201 Q308 Q101 Q201 Q303 Q310Q304Q305Q309 ZD2 Z
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