Kenwood KRC-709 Service Manual Download Page 13

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B E

W11

W12

R12

C12

R14

C14

C22

R11

C11

C17

C21

C13

C20

R10

C23 C24

R13

C26

C25

W14

C17

C24

R12

C26

R14

C12

C14

C22

W12

C23

R11

C13

R10

C21

C20

C25

C11

R13

W11

IC1

DOLBY R

DOLBY

DOLBY L

C15

VR1

VR2

C16

VR1

DOLBY

DOLBY R

VR2

C15

DOLBY L

CN3

CN2

CN4

X87-3022-71/3032-73 (J74-1148-12)

CN4

(J74-1148-12)

CN3

CN2

X87-3022-71/3032-73

Refer to the schematic diagram for the value of resistors and capacitors.

PC BOARD

Component side view

Foil side view

Summary of Contents for KRC-709

Page 1: ...40 1122 05 Please refer to the service manual for model D40 1122 05 B51 7452 00 DC cord E30 4942 05 Remote com assy A70 0886 15 Antenna adaptor T90 0523 05 Screw set N99 1704 05 Stay J54 0606 04 Torsion coil spring G01 2924 04 Lever D10 4562 04 x2 Mounting hardware assy J21 9716 03 Plastic cabinet assy A02 1497 03 DC cord KRC 709 E30 4940 05 KRC 889 E30 4939 05 Remote com assy A70 0883 05 Escutche...

Page 2: ...UX IN BACK UP SW5V B U 5V B U 5V B B CH FM 1800mV TAPE AM 3600mV 855mV 1372mV 600mV 3600mV 1800mV E TYPE K TYPE 1800mV 2250mV 1715mV 4500mV 1069mV AM CH TAPE FM E TYPE ILL TEL MUTE ACC ANT CON P CON BACK UP EXT AMP CONT F E FM B BUFFER NOISE BUFFER DECODER RDS IC11 Q73 IC2 E VOL MPX N C AM B CASSETTE MECH SYSTEM U COM IC1 CD CHANGER MD CHANGER KEY MATRIX RESET SW LCD DRIVER REMO G R SW RESET IC15 ...

Page 3: ...oes H supply SW Q43 Motor driver s voltage SW Base H cassette mecha s submotor Base L mask mecha s motor Q45 46 Panel 5V SW Q45 is turned ON when Q46 s base goes H Q71 Pre out mute driver ON when the base goes L Q72 E VOL Mute SW ON when the base goes H Q73 Noise buffer Q85 IFC out buffer Q86 88 AM B SW Q88 is turned ON when Q86 s base goes H Q87 89 FM B SW Q89 is turned ON when Q87 s base goes H ...

Page 4: ...ontrol DIMMER OFF H 18 TEST Test pin 19 P CON O Power control terminal Power ON H Power OFF L 20 ANT CON O Antenna control terminal TUNER TI ON H ON Open OFF L 21 MUTE O Muting terminal The time constant is 0 48 ms with all models 22 N C O No connection 23 ACC DET I Acc detection terminal Acc detected L Acc not detected H 24 DIMMER I Small detection terminal ON L OFF H 25 SW 5V O 5 V power supply ...

Page 5: ... terminal 57 TYPE1 I Destination type switching port 58 TYPE0 I Destination type switching port 59 N C O Outputs Low No connection 60 N C O Outputs Low No connection 61 ST TYPE1 I IC2 destination type terminal Default L 62 ST TYPE0 I IC2 destination type terminal Default L 63 SRM SW1 I Panel position detection switch 1 Normal H Reset L Panel detached L 64 PAN RESET O Reset output to Panel u COM Mo...

Page 6: ...chanism pack detection terminal Cassette pack detected L Cassette pack not detected H 86 DOLBY O Dolby ON OFF switching ON H OFF L 87 R CLK I RDS decoder CLK input terminal Model without RDS and RBDS Connected to GND 88 CH REQC I Request input from CH ON L 89 KEY REQ I Communication request from LCD driver 90 N C I No connection Connected to GND During TAPE PLAY L 91 EQ MUTE O EQ muting switching ...

Page 7: ...cycle restarts from here Each press of the Track Down key jumps to the previous track number to the track being played 7 Audio related specifications A short press of the Q key initiates the audio adjustment mode Pressing the key on the remote initiates the audio adjustment mode Continuous holding of a remote control key is inhibited Bass Middle and Treble are adjusted in 3 steps of Min Center Max...

Page 8: ...r the security registration mode 3 Enter the code using the Preset 1 2 3 4 keys Example To enter 3510 Press the Preset 1 key 4 times Press the Preset 2 key 6 times Press the Preset 3 key twice Press the Preset 4 key once 4 Press and hold the DISP key for 3 seconds until APPROVED is displayed 5 Exit from the test mode See 2 How to exit from the test mode Note All Clear is not applicable to the secu...

Page 9: ... mode See 1 How to enter the test mode 2 TRANSMIT1 is displayed and the Mask key entry request mode is initiated The display at this time should show in place of 3 Press and hold the key on the Master key remote for more than 3 seconds 4 When TRANSMIT2 is displayed press and hold the key on the Master key remote for more than 3 seconds 5 When APPROVED is displayed the Mask key is cleared the demon...

Page 10: ... PLAY BACK LEVEL TCC 130 Connect a AC voltmeter to CN2 TAPE PLAY VR1 L VR2 R X87 387 5mV 6dBm Set the controls and switches as follows BALANCE center position BASS center position LOUD OFF DOLBY NR OFF FADER center position TREBLE center position tongue Turn 2 times End of Roller ass y FPC Assembly of FPC Flexible PC board onto Roller ass y Turn Roller ass y by 2 times Hook the end of Roller ass y...

Page 11: ...R98 R104 R301 R73 R71 R101 R165 R166 R72 R113 R117 R357 R102 R76 R77 R78 R111 R75 C38 R312 C89 R344 R302 R303 R339 R327 R103 R328 R308 R99 R309 R325 C95 C96 R321 C93 R116 R323 R326 R324 R322 R305 R304 R310 R193 C308 R347 C224 R338 R358 R359 C191 R330 R335 R172 C256 CP10 CP2 CP3 CP4 CP1 R333 R12 R14 R13 R11 C88 R169 C135 R162 C136 C137 R161 C157 C156 C138 R219 R220 R131 R192 C131 R340 R195 X1 R114 ...

Page 12: ...B C84 C85 B E C3 C87 B R107 C2 E C1 C94 R75 R78 R77 R76 R72 R73 C95 R111 R113 C93 W1 R71 8 16 E B 4 332MHz W104 10 W107 R195 R196 8 R192 9 C32 R348 X2 CP2 R115 B E R286 E C92 R116 R110 B E C90 B C253 L9 R114 R108 C252 B E R339 20MHz R324 R323 R328 R327 C256 R330 RESET R322 R325 R358 50 R326 CP3 51 C305 R321 R359 1 75 CP4 76 2 32KHz 26 X1 R357 25 R308 CP1 R311 C307 R367 100 CP9 R347 R344 1 CP8 R310...

Page 13: ...C25 C11 E B R13 R1 C1 W11 R2 C2 R3 C3 Q1 IC1 IC1 Q1 DOLBY R DOLBY DOLBY L R L C15 VR1 C6 W2 W5 W3 W4 W7 W9 W1 W8 W6 VR2 C16 C5 1 3 1 2 4 5 13 1 W5 13 C16 W2 C5 W4 W3 W6 W7 1 W8 VR1 C6 DOLBY W9 DOLBY R VR2 W1 1 2 4 5 C15 L DOLBY L R 1 3 CN3 CN2 CN4 S1 X87 3022 71 3032 73 J74 1148 12 CN4 J74 1148 12 S1 CN3 CN2 X87 3022 71 3032 73 U W Y V X 2 1 3 5 7 4 6 Refer to the schematic diagram for the value o...

Page 14: ... R13 5 4 3 2 1 5 4 3 2 1 20 16 17 18 19 14 15 C14 0 1 R7 20K C12 0 1 10K VR2 1K 0 01 C8 33u10 33u50 C16 C15 33u10 C3 470P 180 R6 R5 180 R3 24K C1 470P R1 24K 470P C2 24K R2 PNK BLK BLU BU 1 YEL EXT CONT ILLMI ORG WHT 3 2 4 BLK GND ANT CONT P CON BLU WHT RED ACC REAR L REAR R 6 5 VIOL GRN BLK VIOL BLK 7 8 GRN FRONT L GRY FRONT R WHT BLK GRY BLK WHT 5 7 1 3 8 RL 7 RL 3 5 1 RR FL FL FR FR RR 6 4 2 B ...

Page 15: ...C 1 VREF IN 3 IN 2 10 9 OUT 1 VCC 2 1 2K R120 2 2 R121 2 2 R122 0 22 C99 0 22 C98 1W 1W 3 10 49 48 47 46 43 42 44 76 75 R190 120 41 9 9 6 11 4 7 3 10 5 8 12 1 2 13 180 R34 180 R33 180 R48 180 R47 C35 0 047 C36 0 047 C37 0 047 C38 0 047 C42 0 047 C41 0 047 C40 0 047 C39 0 047 3 2 1 CREF VREF 27 O FL NC 25 26 NC 28 4 CAS L CAS R O FR 24 CD L VDD 8 NC GND 21 CD R 5 7 6 CD GND O RL O RR 22 23 S MUTE M...

Page 16: ...7uH L7 4 7uH L6 4 5 10 13 47K R172 1 2 4 7K R220 R219 1K SW2 SUB 1 2 6 SW1 SRM DET GND SW3 4 3 5 SUB 7 2 2K R196 2 2K R195 2 2K R192 100K R191 3 67 10 78 66 63 4 7K R218 47K R217 53 41 25 74 93 21 23 16 19 11 49 15 12 9 31 3 C252 47u6 3 4 7uH L9 4 7K R315 22K R348 10K R357 C306 0 01 0 01 C173 R286 47K R288 52 REMO NC CP1 100K R367 2 2K 10 R306 2 2M R307 470 R344 1M R347 W101 W102 98 R361 1K R345 R...

Page 17: ... Q7 VOL 3 S18 S23 CLK S22 S17 S21 DTC143ZUA Q7 B30 1605 05 D5 22 B30 1564 05 D23 OPEN S31 GND LINE D1 A KRC 709 779R RY 889 2 2 IC1 IC2 X13 99XX XX ED1 COMMON ED1 SEGMENT 10K 10K 10K 10K 47K 47K LOUD ST ATT LOUD LOW IN Q CONTROL HIGH MID Q CONTROL LOW IN MID HIGH TI PTY P S MTL 6X9 6inch 5 4inch PTY DAB AUTO NEWS MTL ATT ST B P S NR 1 2 O E M TI 1 NEWS DAB AUTO NR B 6X9 6inch 5 4inch 2 O E M SP ch...

Page 18: ... 57 52 53 54 CM1 CM2 25 21 24 45 23 65 65 66 66 67 67 10 11 1 31 30 34 33 9 9 HD1 17 15 4 22 12 12 20 5 6 7 26 48 48 49 27 94 91 92 94 KRC 709 889 779R RY D N G H C C F B E E E B G 893 H N D 876 Ax2 Ax2 K J J 44 1 2 3 A B EXPLODED VIEW MECHANISM KRC 709 779R RY 889 24 ...

Page 19: ...FPC2 T U U U U P P P P P KRC 709 889 779R RY X14 644X XX X14 6452 73 P P P V V R R S S S P P WH1 L E K Q Q Q D L B B A A F J J B B Px2 D A G H B B B B C F 212 217 756 738 794 786 702 791 739 793 788 RM1 SIZE AAA BATTERY Not supplied DC1 260 254 255 218 280 734 227 225 226 228 229 204 251 262 243 203 258 206 210 224 216 230 231 223 242 PME1 248 208 245 257 232 Depends on the model Refer to the part...

Page 20: ... GLASS M2 219 3C B10 3242 01 FRONT GLASS E5E7 H54 2089 03 ITEM CARTON CASE E5 B46 0100 50 WARRANTY CARD KM2E5 B46 0606 04 ID CARD K 254 1C J19 5051 03 BRACKET J CAR L KM2 255 1C J19 5052 03 BRACKET J CAR R KM2 B46 0612 14 ID CARD CODE SECURL M2 257 2C J21 9651 13 MOUNTING HARDWARE ASSY B46 0632 04 ID CARD MASK KEY E5E7 258 2C J21 9699 04 MOUNTING HARDWARE B58 1309 04 CAUTION CARD MASK KEY E5E7 259...

Page 21: ...UF K C94 C90 2608 05 ELECTRO 1 0UF 50WV 288 3C E29 1596 04 CONDUCTIVE RUBBER C95 CK73GB1H103K CHIP C 0 010UF K E5E7 J1 E59 0835 05 RECTANGULAR PLUG C96 CK73GB1H103K CHIP C 0 010UF K CP1 R90 1016 05 MULTI COMP 470 X4 C98 99 CK73FB1C224K CHIP C 0 22UF K CP2 3 R90 0724 05 MULTI COMP 1K X4 C108 CK73GB1H222K CHIP C 2200PF K R1 RK73GB1J433J CHIP R 43K J 1 16W C109 CK73GB1C104K CHIP C 0 10UF K R2 5 RK73G...

Page 22: ...ALL FIXED INDUCTOR 4 7UH K R115 RK73FB2A122J CHIP R 1 2K J 1 10W R116 RK73GB1J104J CHIP R 100K J 1 16W L8 9 L40 4795 91 SMALL FIXED INDUCTOR 4 7UH J R117 RK73EB2B102J CHIP R 1 0K J 1 8W M2E5E7 L10 L92 0075 05 CHIP FERRITE R118 RD14DB2H102J SMALL RD 1 0K J 1 2W L12 L33 1170 05 CHOKE COIL ASSY R119 RK73FB2A103J CHIP R 10K J 1 10W X1 L78 0821 05 RESONATOR X2 L77 2738 05 CRYSTAL RESONATOR R120 RK73FB2...

Page 23: ...16W KM2 IC2 TDA7407D ANALOGUE IC R338 RK73GB1J102J CHIP R 1 0K J 1 16W IC3 M5237ML IC VOLTAGE REGULATOR R339 RK73GB1J103J CHIP R 10K J 1 16W IC4 TA8263BH ANALOGUE IC R340 RK73GB1J222J CHIP R 2 2K J 1 16W E5E7 IC10 TC74HC02AF IC R341 RK73GB1J104J CHIP R 100K J 1 16W KM2 IC11 TDA7479D ANALOGUE IC E5E7 R344 RK73GB1J471J CHIP R 470 J 1 16W IC13 BA6238A ANALOGUE IC R345 RK73GB1J104J CHIP R 100K J 1 16W...

Page 24: ...LAMPER C15 16 CE04NW1A330M ELECTRO 33UF 10WV C17 CK73GB1A474K CHIP C 0 47UF K 48 3B D01 0613 08 FLYWHEEL ASSY C20 CK73GB1H472K CHIP C 4700PF K 49 3B D16 0616 08 BELT C23 CK73GB1A474K CHIP C 0 47UF K 52 1B D10 4385 08 ARM CASSETTE LIFTER B 53 1B J19 4953 08 CASSETTE HOLDER C24 CK73GB1E333K CHIP C 0 033UF K 54 1A G11 1861 08 CUSHION C24 CK73GB1H333K CHIP C 0 033UF K 56 1B D10 4386 08 ARM ASSY CN2 E4...

Page 25: ...Installation Size W 182 mm H 53 mm D 155 mm Weight 1 7kg KRC 709 779R RY 889 31 SPECIFICATIONS KRC 709 Frequency Range 87 9MHz 107 9MHz Frequency step 200kHz Channel Space Selection 50k 200kHz Usable Sensitivity 9 3dBf S N 30dB 0 8µV 75Ω FM Quieting Sensitivity 15 2dBf S N 50dB 1 6µV 75Ω Frequency Response 30Hz 15kHz 3 0dB S N 70dB MONO Selectivity 80dB 400kHz Stereo Separation 40dB 1kHz Frequency...

Page 26: ...roplaza 223 Hing Fong Road Kwai Fong N T Hong Kong KENWOOD ELECTRONICS GULF FZE P O Box 61318 Jebel Ali Dubai U A E KENWOOD ELECTRONICS THAILAND CO LTD 2019 New Pechburi Road Bangkapi Huaykwang Bangkok 10320 Thailand KENWOOD ELECTRONICS SINGAPORE PTE LTD 1 Genting Lane 07 00 Kenwood Building Singapore 349544 KENWOOD ELECTRONICS MALAYSIA SDN BHD 4 01 Level 4 Wisma Academy Lot 4A Jalan 19 1 46300 Pe...

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