Kenwood KRC-31Y, Service Manual

Page 1: ...SCAN REP T CALL M RDM B S RDM MENU AUTO AME CLK KRC 4904 SRC OFF 45Wx4 AUD DISC KRC 36 37 37Y 391 394 394Y 466R Mounting hardware assy J21 9716 03 Plastic cabinet assy A02 1486 13 Screw set N99 1610 15 Lever D10 4589 04 x2 Antenna adaptor T90 0523 05 DC cord E30 4792 05 Depends on model Refer to the parts list Screw set N99 1719 05 WIDE BAND KRC 31Y 366L KRC 4904Y Panel assy KRC 391 A64 2538 02 KR...

Page 2: ...CONT MUSIC EQ MUTE MS CONT FWD REV PACK IN M STBY T MODE T END L CE 340mV SUB SUB Rch Lch PACK T END M STBY T MODE FWD REV AUDIO 8V MOTOR BU14V SW5V IN PLAY HEAD SW5V BU14V BU5V BU14V EN1 EN2 EN3 P CON ILLUM B U 5V AM B AUDIO FM B FM B AM B AUDIO 8V AUDIO 8V AUDIO 8V BU5V SW5V TAPE CD CH AM FM 1719mV 3424mV 550mV 1727mV TAPE CD CH AM FM 1786mV 3546mV 850mV 1345mV AM 160mV FM 213mV CD L R 1200mV BU...

Page 3: ...tage level becomes H Q151 Panel 5V SW Works when the base terminal voltage level becomes L Supplies VDD to panel Q201 Noise detection Detects noise Q221 224 Preout mute Mutes when the base terminal voltage level becomes H Q251 Power IC SVR SW Discharges the capacitor s voltage of SVR terminal after the base terminal voltage becomes H Q301 Local seek SW Changes to the local seeking after the base t...

Page 4: ... constant switch 32 LO DX O Local seeking switch H LO L DX 33 VSS1 GND 34 P MUTE O Power amplifier muting 35 SVR O SVR control 36 37 IC2 SCL O E volume communication clock 38 IC2 SDA I O E volume communication data 39 MUTE O Muting control 40 P STBY O Power amplifier standby Pin No Pin Name I O Function Operating Condition 41 P CON DET I P CON short circuited detection 42 CH CONT O Changer control...

Page 5: ...t good ANT input 7 seg model 1111 is good 0000 is not good AM Section While holding preset 1 key press and hold preset 6 key 990kHz TEST MODE ON for a few seconds 1 SD 0 mod AM Preset 1 key and ADJ OK is good 35dBµ 990kHz preset 6 key ADJ NG is not good ANT input 7 seg model 1111 is good 0000 is not good Cassette Deck Section TCC 153 Head azimuth screw Adjust so that output level in 1 AZIMUTH 10kH...

Page 6: ...C403 C201 C256 C253 C252 C251 C254 R221 R224 R223 L301 C1 L304 L303 L101 L306 L305 C509 C513 C507 C353 C505 C514 C518 C517 C351 C55 C306 C54 C50 C51 C52 C301 C53 C56 C101 C501 L1 R304 R305 R162 R102 R103 R10 R31 C531 C1 R14 1 18 1 25 2 24 9 10 6 7 5 1 13 11 3 8 12 4 2 1 2 12 13 1 24 7 1 B E 1 10 2 1 14 15 WH1 J2 CN2 CN1 P1 D251 D253 D252 D101 D40 D2 D551 D4 D3 D411 D410 D409 D401 D404 D403 D402 D1...

Page 7: ... C307 C308 C302 C303 C305 C225 C532 C352 R101 R32 R50 R51 R104 R108 R109 R110 R105 R106 R107 R11 R12 R22 R23 C208 C209 R263 R256 C205 C204 R3 C2 R353 CP315 CP102 CP10 4 CP101 R145 CP103 R144 C106 R146 R15 R16 R4 C260 C259 TH1 14 1 28 15 1 4 5 8 1 7 8 14 1 8 9 16 40 1 10 11 20 21 30 31 B E 2 1 4 3 6 10 1 5 80 1 20 21 40 41 60 61 IC2 Q251 Q223 Q501 Q224 IC10 IC6 Q222 Q221 Q552 Q40 Q301 Q101 Q20 Q10 ...

Page 8: ...2 2L Refer to the schematic diagram for the values of resistors and capacitors FOIL SIDE VIEW B E E B B E KI2 KI3 KI4 KI5 KS2 KS3 RES R16 R15 R18 R17 C5 R13 R14 R10 R9 R3 R4 R1 R2 R7 R8 R5 R6 C3 C1 C2 C4 R12 R11 R20 C6 C8 R23 R19 R22 C7 14 15 1 2 64 65 80 1 24 25 40 41 LGND REMO SW5V DATAL L CE PAN5V DGND KS4 WL B LRES KS5 KI1 L CLK DATAS Q3 Q2 Q1 D18 D17 D19 J1 IC1 X16 1532 7x J74 1303 02 X16 153...

Page 9: ...3 Q2 Q1 D18 D17 D19 J1 IC1 X16 1532 7x J74 1304 02 X16 1532 7x J74 1304 02 IC Q Address 1 4T 1 3T 2 3T 3 3T Refer to the schematic diagram for the values of resistors and capacitors AUD FM AM TI 56 RST CLK 6 5 4 3 2 1 2 3 4 1 VOL SRC ATT KI1 KS2 KS3 1 KI4 KS4 KS5 KS3 KI5 KI2 D14 IC2 D6 D5 D8 D7 D2 D1 D4 D3 D9 D12 D10 D11 D20 ED1 D22 D21 D13 X16 1532 7x J74 1304 02 X16 1532 7x J74 1304 02 IC Addres...

Page 10: ...0 C509 B U 42 44 16 63 18 17 5 4 3 2 1 SGND IN2 IN1 NC VCC 6 7 8 9 10 PGND OUT2 NC OUT1 NC 470 0 01 330K 5 1K 0 1u50 22u6 3 C514 150 R514 0 01 330K 5 1K R513 150 C513 22u6 3 C517 0 1u50 15K 1500P R533 470 C532 0 01 R534 100K 470 57 64 R415 100K C404 0 01 VDD GND 1 2 14 13 3 12 11 4 5 6 7 10 9 8 77 59 58 C533 C534 9 7 R551 10K STBY T END GND GND 4 6 7 5 2 3 1 M B R552 1K 20 19 R556 470 R554 470 1 2...

Page 11: ...253 FR RR RL FL 23 22 21 20 19 18 17 16 15 14 13 12 11 9 10 MS GV S MS GV R MA OUT MSI MS DET VCC MUSIC S R MSGV F R MTL MUTE 54 55 47u10 C501 0 01 C502 56 180K R502 0 22u50 C505 C506 4 7 R501 3 3K R20 R32 22K 10K R30 C30 0 01 1 2W 10K R11 1000P C14 R14 82K 56K R15 100K R16 30K R10 VDD 14 13 12 11 10 9 8 C40 0 01 RR FR RL FL 0 01 C508 24K R504 0 47u50 C507 1 6K R503 10u10 22 R537 37 38 5 7 6 2 2u5...

Page 12: ...100u10 C301 4 7uH L303 L304 4 7uH 12 R303 R304 4 7 C308 0 01 10 4 7uH L305 29 L306 4 7uH C306 10u16 0 01 C307 AM LO DX CP101 1K 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 30 31 32 33 34 35 36 37 38 39 40 XT1 XT2 IC X1 X2 VDD 1 VSS 0 KEY REQ PACK IN CH REQ C R CLK REMO RESET SUB SUB FWD REV EQ MUTE MS CONT MUSIC SW5V EN1 EN3 BEEP EN2 0 EN2 1 CH R...

Page 13: ...5 S54 S53 S52 S51 S50 S49 S48 S47 GREEN RED KEY S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 KI1 KI2 KI3 KI4 KI5 VDD VDD1 VDD2 VSS TEST OSC L RES L DATA L L CE L CLK L DATA S KI1 KI2 KI4 KI3 C3 0 047 C1 C2 0 047 56K 0 01 R4 4 7 R3 4 7K R2 79 80 78 76 77 80 79 77 78 R5 1K R6 470 R7 470 R9 470 R8 470 1 4 OUT VCC 2 3 GND2 GND1 R10 1K 76 C5 KS5 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 KS4 KS3 K...

Page 14: ...4 TP13 TP12 TP11 TP16 TP17 TP18 TP19 KRC 466R M KRC 394Y E KRC 394 E KRC 37Y E KRC 36 E KRC 391 E KRC 366L M KRC 37 E KRC 31Y E KRC 4904Y E No 13 9 22 11 23 24 10 25 26 12 31 29 27 28 14 15 30 16 17 33 32 18 19 34 35 20 21 39 44 26 24 36 37 23 22 38 39 25 28 40 41 27 42 43 29 30 48 46 45 31 32 47 33 34 50 49 35 36 51 52 38 37 53 54 40 55 56 C2 C1 C3 CAUTION For continued safety replace safety crit...

Page 15: ...8 N09 4195 08 N09 4196 08 N09 4197 08 N09 4198 08 N09 4199 08 N09 4200 08 N19 2087 08 N19 2088 08 N19 2135 08 N19 2146 08 N19 2091 08 N19 2092 08 N29 0510 08 4 73 27 2 55 76 a CM1 63 79 52 79 6 52 74 74 45 16 16 13 13 17 45 67 8 40 41 77 9 68 1 37 19 10 107 38 94 95 80 15 18 53 83 62 23 22 59 35 46 42 69 36 7 47 48 103 105 100 102 3 HD1 33 75 32 34 26 24 CM2 70 25 71 44 39 57 14 43 G R R L M Q Q L...

Page 16: ...K φ3x5 φ3x8 φ3x16 φ3x8 WASHER N30 2604 46 N30 2608 46 N80 2006 46 N80 2008 45 N83 3005 46 N80 3008 46 N83 3016 46 N84 3008 46 N29 0205 04 D D D D N 220 223 236 221 CL1 235 237 X16 C C PA1 207 245 255 253 238 252 250 251 225 208 254 301 302 ED1 304 303 204 203 E E B A 264 263 266 DC1 248 201 222 x2 740 770 772 Depends on model Refer to the parts list Parts with the exploded numbers larger than 700 ...

Page 17: ... LEVER 221 3D D10 4447 03 LEVER 222 1C D10 4589 04 LEVER 223 3D D21 2329 04 SHAFT CME1 1C D40 1150 05 CASSETTE MECHANISM ASSY 225 3C E29 1880 02 CONDUCTIVE RUBBER DC1 1C E30 4792 05 DC CORD F1 2D F52 0006 05 FUSE MINI BLADE TYPE 235 3D G01 2525 04 TORSION COIL SPRING 236 3D G01 2987 04 TORSION COIL SPRING KRC 31Y 36 366L 37 Y 391 394 Y 466R 4904Y 237 3D G01 3096 04 EXTENSION SPRING 238 3C G01 3149...

Page 18: ...73GCH1H100D CHIP C 10PF D M2EE1 C401 402 C90 2608 05 ELECTRO 1 0UF 50WV C403 CE04CW1A101M ELECTRO 100UF 10WV C404 CK73GB1H103K CHIP C 0 010UF K C501 CE04CW1A470M ELECTRO 47UF 10WV C502 CK73GB1H103K CHIP C 0 010UF K C505 C90 2604 05 ELECTRO 0 22UF 50WV C506 CK73GB1H103K CHIP C 0 010UF K C507 C90 2606 05 ELECTRO 0 47UF 50WV C508 CK73GB1H103K CHIP C 0 010UF K C509 C90 2608 05 ELECTRO 1 0UF 50WV C511 ...

Page 19: ... R204 RK73GB2A102J CHIP R 1 0K J 1 10W E2E3E4 R204 RK73GB2A102J CHIP R 1 0K J 1 10W E5 R204 RK73GB2A102J CHIP R 1 0K J 1 10W M2EE1 R205 RK73GB2A472J CHIP R 4 7K J 1 10W E2E3E4 R205 RK73GB2A472J CHIP R 4 7K J 1 10W E5 R205 RK73GB2A472J CHIP R 4 7K J 1 10W M2EE1 R223 224 RD14BB2C271J RD 270 J 1 6W R227 228 RK73GB2A303J CHIP R 30K J 1 10W R231 232 RD14BB2C101J RD 100 J 1 6W R251 254 RK73GB2A472J CHIP...

Page 20: ...E3E4 Q201 2SC4081 TRANSISTOR E5 Q201 2SC4081 TRANSISTOR M2EE1 Q201 2SD1819A TRANSISTOR E2E3E4 Q201 2SD1819A TRANSISTOR E5 Q201 2SD1819A TRANSISTOR M2EE1 Q223 224 DTC143TUA DIGITAL TRANSISTOR Q223 224 UN5216 DIGITAL TRANSISTOR Q251 DTC114YUA DIGITAL TRANSISTOR Q251 UN5214 DIGITAL TRANSISTOR Q301 DTC124EUA DIGITAL TRANSISTOR E2E3E4 Q301 DTC124EUA DIGITAL TRANSISTOR E5E6 Q301 DTC124EUA DIGITAL TRANSI...

Page 21: ...08 GEAR ASSY 22 2B D10 4115 08 SLIDER 23 3B D10 4116 18 SLIDER 24 1B J21 7780 08 MOUNTING HARDWARE 25 1B D10 4117 18 ARM 26 1B D10 4118 08 SLIDER 27 1A A52 0716 08 HOLDER 32 1B J90 0767 08 GUID 33 1B J19 4737 08 BRACKET 34 1B D12 0622 08 CAM 35 2B D13 1327 08 GEAR 36 2B D13 1328 08 GEAR 37 3A D13 1329 08 GEAR 38 3A D10 4119 08 ARM 39 1B D13 1330 08 GEAR 40 2A D13 1331 08 GEAR 41 2A D13 1332 08 GEA...

Page 22: ...as fournis Teile ohne Parts No werden nicht geliefert Ref No A d d N e w Parts No Description Desti nation Ref No A d d N e w Parts No Description Desti nation E KRC 394 E4 KRC 394Y M2 KRC 466R E1 KRC 37 E5 KRC 37Y M3 KRC 366L E2 KRC 36 E6 KRC 31Y E3 KRC 391 E7 KRC 4904Y PARTS LIST CM1 1A T42 0759 18 MOTOR ASSY MAIN CM2 1B T42 1005 08 MOTOR ASSY SUB CASSETTE MECHANISM ASSY D40 1150 05 ...

Page 23: ... C 0 80 150 220 330 470 750 Tolerance More than 10pF Code C D G J K M X Z P No code 0 25 0 5 2 5 10 20 40 80 100 More than 10µF 10 50 20 20 0 Less than 4 7µF 10 75 Voltage rating 2nd word A B C D E F G H J K V 1st word 0 1 0 1 25 1 6 2 0 2 5 3 15 4 0 5 0 6 3 8 0 1 10 12 5 16 20 25 31 5 40 50 63 80 35 2 100 125 160 200 250 315 400 500 630 800 3 1000 1250 1600 2000 2500 2150 4000 5000 6300 8000 CHIP...

Page 24: ...14 4V Current Consumption 10A 10A 10A Installation size WxHxD 182x53x152 mm 182x53x152 mm 182x53x152 mm Weight 1400g 1400g 1400g KRC 31Y 36 366L 37 Y 391 394 Y 466R 4904Y KENWOOD CORPORATION 2967 3 Ishikawa machi Hachioji shi Tokyo 192 8525 Japan KENWOOD SERVICE CORPORATION P O BOX 22745 2201 East Dominguez Street Long Beach CA90801 5745 U S A KENWOOD ELECTRONICS CANADA INC 6070 Kestrel Road Missi...