Kenwood KRC-708 Service Manual Download Page 8

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

PC BOARD

C15

R28

R26

C19

OPEN

R10

R24

R23

R29

R27

R15

R12

R14

R13

C10

C14

C13

C12

R31

C16

R19

R20

R17

R18

R21

R25

R22

R16

CP1

C17

R30

ILL+B

KI5

KS3

KS2

KS1

KI4

KS4

KI3

KS5

KI2

KI1

ILL G

RESET

LOCK SW

DIMMER

DGND

VDD

REMO

L DATAL

ATA

L CLK

L C

E B

100

B E

R25

C19

R19

R31

KI1

ILL G

C15

B
E

C16

R18

RESET

R26R28

C14

KI2

KS5

KI3

LOCK SW

R10

KS4

KI4

R21

KS1

C1
1

C10

R1
1

R12

DIMMER

R30

C17

100

C12

VDD

R13

R14

R27

B E

DGND

R15

KS2

REMO

R23

R29

R24

D
ATA

L DATAL

CP1

R16

R20

L CLK

L C

R22

ILL+B

KS3

R17

C13

KI5

IC1

CN1

IC2

S23

S22

S23

IC1

S22

IC2

CN1

S10

S12

S13

S21

S15

S16

S17

S14

S18

S19

S20

RESET

IC3

X13-9720-10 (J74-0984-12)

ED1

S12

S19

IC3

S14

S15

S20

RESET

S10

ED1

S13

S18

S21

S17

S16

X13-9720-10 (J74-0984-12)

120

139

EJECT

SRC

CLK

AUD

DISC

AUT

EJECT

139

AT
T

11
9

120

SRC

AUT

DISC

AUD

CLK

(Component side view)

(Foil side view)

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Summary of Contents for KRC-708

Page 1: ...9 05 KRC PS988R E30 4781 05 Plastic cabinet assy A02 1489 03 The CASSETTE MECHANISM OPERATION DESCRIPTION is the same model D40 1122 05 Please refer to the service manual for model D40 1122 05 B51 7452 00 KRC PS988R KRC X858 B S MTL DISP KRC 708 B S MTL DISP KRC 888 AUTO AME Panel assy A64 1861 02 Panel assy A64 1859 02 Front glass B10 3102 01 KRC 708 Escutcheon assy B07 2139 03 Front glass B10 31...

Page 2: ... A8V SW5V PLL DATA PLL CE FM SD FSD OUT REQUEST RDS OUT SW5V FM B AM B S METER FM SD NARROW IF MODE PLL CE NOISE CH MUTE BACK UP 6 13 8 SW5V S METER P MUTE EXT AMP CONT AC GND DIMMER PHONE ACC DET P CON BU DET BEEP SW5 P ON L CLK L DATAS L CE L DATAL LOCK SW DIMMER REMO BU5V 160mV 1200mV 388mV 2 ILL ON 213mV MS OUT MODE 1 MODE 3 TAPE IN MODE 2 DOLBY ON OFF DOLBY B C MTL ON OFF MS MODE R REEL F REE...

Page 3: ...e detection 28 P13 ANI3 SMETER I FM S meter detection 29 P14 ANI4 F_REEL I Cassette mechanism reel pulse input FWD 30 P15 ANI5 R_REEL I Cassette mechanism reel pulse input REV 31 P16 ANI6 N C I 32 P17 ANI7 N C I 33 AVss AVss A D GND terminal 34 P130 ANO0 EXT_AMP O External amp control L 40mS Bass boost OFF L 70mS Bass boost LOW L 100mS Bass boost Hi 35 P131 ANO1 IF_MODE I IF status detection for K...

Page 4: ...l 73 P60 A16 TYPE0 I Destination type terminal 0 74 P61 A17 TYPE1 I Destination type terminal 1 75 P62 A18 TYPE2 I Destination type terminal 2 76 P63 A19 ST_TYPE0 I IC2 Ver 3 destination type terminal 0 77 P64 RD ST_TYPE1 I IC2 Ver 3 destination type terminal 1 78 P65 WR N C O Not used 79 P66 WAIT N C O Not used 80 P67 ASTB N C O Not used 81 Vdd Vdd B U 5V 82 P100 TI5 TO5 SVR O SVR discharge contr...

Page 5: ...est mode 2 Press the SRC key to select ALL OFF 3 Press and hold the AUDIO key for 1 second to enter the menu mode 4 Press the FM AM key to select SECURITY 5 Press and hold the Track UP DOWN key for 2 seconds 6 Enter the security code by pressing the preset 1 2 3 and 4 keys Example To enter 3510 Press preset key 1 4 times Press preset key 2 6 times Press preset key 3 2 times Press preset key 4 1 ti...

Page 6: ... key 4 Press and hold the FM or AM key for more than 2 sec onds so that TRANSMIT1 is displayed 5 Point the MASK key cancel remote control toward the light sensor and press for more than 3 seconds until the level indicator indicates the full condition 6 When TRANSMIT2 is displayed press and hold the MASK key again for more than 3 seconds If TRANS MIT1 is displayed now go back to step 2 and restart ...

Page 7: ...ey press and hold preset 6 key for a few seconds ADJ OK is displayed if the adjustment is OK and ADJ NG is displayed if it is not good CASSETTE DECK SECTION 1 AZIMUTH TCC 153 10kHz Connect a AC voltmeter to SP OUT TAPE PLAY Head Azimuth Screw Adjust the azimuth for each Lch Rch or FWD RVS becomes maximum 2 PLAY BACK LEVEL TCC 130 Connect a AC voltmeter to CN2 TAPE PLAY VR1 L VR2 R X87 387 5mV 6dBm...

Page 8: ...0 C17 100 C12 VDD 1 R13 R14 R27 B E DGND R15 76 75 KS2 26 25 REMO R23 R8 R29 R24 R6 50 51 E B E B 15 1 2 14 L DATAS L DATAL CP1 R16 R20 L CLK L CE R22 ILL B KS3 R17 C13 KI5 IC1 CN1 Q3 Q8 Q2 Q1 Q5 Q4 Q7 Q6 D1 IC2 S23 S22 Q2 Q6 Q7 Q5 S23 Q1 IC1 S22 D1 Q8 IC2 Q4 Q3 CN1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S21 S15 S16 S17 S14 S18 S19 S20 RESET IC3 D6 D5 S1 D3 D2 D4 X13 9720 10 J74 0984 12 ED1 S12 S...

Page 9: ...44 D37 D36 8V 5V L6 L5 L8 R110 R118 R108 VR1 R152 R149 R151 R174 R5 R6 R9 R10 R145 R148 R142 R141 C12 C11 C15 C16 R196 R195 R197 R103 R97 R98 R60 R131 R109 W32 R106 R112 R32 R33 R30 R31 R36 R37 R34 R35 R29 R27 R28 R23 R24 R38 R52 R55 R51 R58 R59 R56 R57 R43 R44 R41 R42 R45 R46 C162 R293 C257 R291 R294 C89 C122 R307 R342 C124 W8 W7 R102 R101 R1 R2 R117 R111 R3 C7 C8 R78 R73 R76 R75 R324 R257 R332 R...

Page 10: ...3 IC12 D71 IC5 J2 Q3 Q4 CN6 WH1 F E CN8 CN2 CN3 D6 IC4 D18 D12 J1 IC13 D55 Q60 D7 Q59 Q57 D51 D50 IC14 Q25 Q55 Q56 D31 D37 D36 D40 Q28 IC10 Q31 X14 618X XX A 2 J74 0986 22 IC2 CN1 IC1 D78 Q41 Q20 D13 D15 D39 Q26 D17 D11 8V Q27 D32 5V Q22 J3 D22 D53 Q44 Q38 Q42 D44 D33 CN4 Q40 IC11 Q91 CN9 X14 B 2 Q92 Q93 23 C25 R57 R59 R35 R36 R5 R37 4 L REAR R L R FRONT 1 C44 C43 R34 C48 B E R44 R46 R42 R45 R41 R...

Page 11: ...21 22 NC NC NC AM IF 24 23 SDA SCL 25 NC 6 23 1u50 C143 AGND 25 CL1 4 CREF 24 CL2 5 0 27 7 22 C11 HP FL1 0 27 CR2 21 HP FL2 0 27 8 AUX2 OUTR 29 CDL OUT NC NC NC CDL NC 27 VDD 26 OUT RR 28 CDR OUT CD GND CDR 31 30 OUT RF OUT LR 32 NC OUT LF 0 27 C13 C14 19 HP FR2 20 C12 HP FLOUT 9 18 HP RL1 0 27 C15 HP FROUT 0 27 C17 0 27 C18 16 C16 17 HP RR1 0 27 HP RL2 HP RLOUT OUT REF HP RR2 15 HP RROUT 34 35 C2...

Page 12: ...22K R166 1K 4 0 01 C153 N C N C 7 5 FM B AM B 6 0 01 C151 L2 3 AM ANT IN 2 RF GND FM ANT IN L3 D61 2 1 L1 52mH NO ICL7660SIBA NO UPD784218GC105 IC1 NO TC7662BEOA A1 X86 3222 70 YES NO NO YES NO NO NO YES YES NO NO YES NO NO YES YES YES NO NO NO NO NO YES NO NO YES NO YES NO NO YES YES YES YES NO NO YES YES NO NO IC6 0 21 0 12 0 11 0 22 2 73 2 72 2 71 2 70 X86 3100 10 UPD784217GC103 NO NO MODEL NAM...

Page 13: ... IC2 COM2 64 65 IC2 SEG35 35 139 138 137 136 135 134 IC1 SEG1 IC1 SEG2 IC1 SEG3 IC1 SEG4 IC1 SEG5 2 1 5 3 4 133 132 131 130 129 IC1 SEG6 IC1 SEG7 IC1 SEG8 IC1 SEG9 IC1 SEG10 IC1 SEG11 8 9 6 7 10 11 25 23 24 21 22 20 19 18 17 16 15 13 14 11 12 10 9 7 8 6 5 4 3 1 2 50 48 49 47 46 45 44 43 42 40 41 38 39 36 37 34 35 29 32 33 30 31 27 28 26 51 53 52 55 54 56 57 58 59 60 76 77 78 79 81 80 82 98 99 100 ...

Page 14: ...SEG3 SEG1 SEG2 SEG4 SEG5 SEG6 SEG10 SEG12 SEG14 SEG13 SEG11 SEG8 SEG9 SEG41 SEG23 SEG19 SEG17 SEG18 SEG20 SEG16 SEG22 SEG21 SEG27 SEG25 SEG26 SEG28 SEG24 SEG30 SEG29 SEG49 SEG45 SEG43 SEG44 SEG42 SEG46 SEG47 SEG48 SEG50 SEG60 SEG58 SEG56 SEG57 SEG59 SEG54 SEG53 SEG52 SEG55 SEG51 3 2 1 11 6 5 4 8 7 10 9 17 16 15 14 13 12 18 28 20 19 21 27 26 25 24 23 22 137 138 139 134 135 136 131 132 133 129 130 1...

Page 15: ...1 17 15 4 22 12 12 20 5 6 7 26 48 48 49 27 893 94 90 94 92 75 D N G H C C F B E E E B G H N D Ax2 Ax2 K J J 1 2 3 A B KRC 708 888 X858 PS988R 24 EXPLODED VIEW MECHANISM www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 ...

Page 16: ...0 20 F F Fx2 X87 301X XX 807 805 792 752 792 811 810 808 790 762 761 717 797 X14 X14 X13 978 X92 X13 978 X13 978 X13 978 X13 972 X13 972 X13 972 X13 972 X13 972 X13 978 X13 978 J 2 744 243 243 243 243 713 253 250 250 223 224 269 258 214 242 242 DC1 RC1 262 254 225 283 226 268 RC2 261 284 218 219 Size AAA battary Not supplied 200 216 202 239 236 248 300 259 249 259 232 234 235 206 208 233 231 251 2...

Page 17: ...2146 03 ESCUTCHEON ASSY K H21 1123 04 PROTECTION SHEET 219 1C B07 2183 02 ESCUTCHEON J CAR H25 0329 04 PROTECTION BAG 280X450 220 3C B10 3099 01 FRONT GLASS K H25 0337 04 PROTECTION BAG 180X300 220 3C B10 3100 01 FRONT GLASS K1 H25 1108 04 PROTECTION BAG 100X300 220 3C B10 3101 01 FRONT GLASS M1 H54 1674 03 ITEM CARTON CASE K 220 3C B10 3102 01 FRONT GLASS M2 H54 1675 03 ITEM CARTON CASE K1 B46 01...

Page 18: ...2 FPC2 2C J84 0106 02 FLEXIBLE PRINTED WIRING BOARD C13 17 CK73FB1H103K CHIP C 0 010UF K M1 C19 CK73EB1C105K CHIP C 1 0UF K U 2C N38 2025 46 PAN HEAD MACHIN SCREW 296 2C E29 1596 04 CONDUCTIVE RUBBER CN1 E59 0833 05 RECTANGULAR PLUG C1 2 C92 0685 05 ELECTROLYTIC CAPACITOR C3 C92 0092 05 CHIP C 47UF 6 3WV CP1 R90 1016 05 MULTI COMP 470 X4 C4 CK73FB1H103K CHIP C 0 010UF K R1 RK73FB2A433J CHIP R 43KJ...

Page 19: ...K73FB1H103K CHIP C 0 010UF K KM1 CN2 E40 5029 05 FLAT CABLE CONNECTOR C125 C90 2597 05 ELECTRO 10UF 16WV KM1 CN3 E40 9666 05 PIN ASSY C126 CK73EB1C225K CHIP C 2 2UF K KM1 CN4 E40 9665 05 PIN ASSY C131 CK73FB1H103K CHIP C 0 010UF K CN6 E40 3239 05 PIN ASSY M1 C132 CE04CW1A101M ELECTRO 100UF 10WV KK1M2 CN8 E40 9080 05 PIN ASSY KM1 C132 CE04CW1A470M ELECTRO 47UF 10WV M1 CN9 E40 9099 05 SOCKET FOR PIN...

Page 20: ... J 1 8W R152 153 RK73FB2A913J CHIP R 91K J 1 10W KM1 R73 RK73EB2B362J CHIP R 3 6K J 1 8W R161 162 RK73FB2A472J CHIP R 4 7K J 1 10W R74 76 RK73EB2B102J CHIP R 1 0K J 1 8W R165 166 RK73EB2B102J CHIP R 1 0K J 1 8W R77 RK73EB2B101J CHIP R 100 J 1 8W R167 168 RK73FB2A223J CHIP R 22K J 1 10W R78 RK73EB2B470J CHIP R 47 J 1 8W R173 RK73FB2A105J CHIP R 1 0M J 1 10W M1 R79 83 RK73FB2A104J CHIP R 100K J 1 10...

Page 21: ...HIP R 4 7K J 1 10W M1 D38 M1F60 DIODE KK1M2 R294 RK73FB2A223J CHIP R 22K J 1 10W KK1M2 D39 40 1SR139 400 DIODE KK1M2 R294 RK73FB2A273J CHIP R 27K J 1 10W M1 D40 1SR139 400 DIODE M1 R295 296 RK73FB2A102J CHIP R 1 0K J 1 10W R297 RK73FB2A472J CHIP R 4 7K J 1 10W M1 D41 DAN202K DIODE D41 MA152WK DIODE R301 RK73FB2A470J CHIP R 47 J 1 10W D42 MA3220 H ZENER DIODE R302 RK73FB2A105J CHIP R 1 0M J 1 10W D...

Page 22: ...ISTOR Q58 59 2SA1037K TRANSISTOR KM1 Q19 DTA124EK DIGITAL TRANSISTOR Q60 61 2SC2412K TRANSISTOR KM1 Q19 KRA103S TRANSISTOR Q60 61 2SD601A TRANSISTOR KM1 Q19 UN2112 DIGITAL TRANSISTOR Q62 2SA1037K TRANSISTOR KM1 Q20 2SB1565F E F TRANSISTOR Q71 DTA124EK DIGITAL TRANSISTOR Q21 2SC2412K TRANSISTOR Q71 KRA103S TRANSISTOR Q21 2SD601A TRANSISTOR Q71 UN2112 DIGITAL TRANSISTOR Q22 2SB1565F E F TRANSISTOR Q...

Page 23: ...86 08 ARM ASSY R9 RK73GB1J302J CHIP R 3 0K J 1 16W M1 57 1B G01 2962 08 TENSION COIL SPRING R9 RK73GB1J362J CHIP R 3 6K J 1 16W KK1M2 58 1B D10 4387 08 SLIDER R10 RK73GB1J303J CHIP R 30K J 1 16W M1 R10 RK73GB1J333J CHIP R 33K J 1 16W KK1M2 65 2A B09 0522 08 REEL CAP R11 12 RK73FB2A102J CHIP R 1 0K J 1 10W KK1M2 66 2A G01 2963 08 COMPRESSION SPRING 67 2A D03 0314 08 REEL GEAR ASSY R11 12 RK73FB2A24...

Page 24: ...µV S N 20dB Tape Speed 4 76cm sec Wow Flutter 0 08 WRMS FREQ Response Hz 3 0dB 30 18kHz 70µs CASSETTE Separation 43dB 1kHz S N dB Dolby NR off 57dB Dolby BNR on 65dB Dolby CNR on 73dB Preout Level mV Load Unbalanced 4500mV 10kΩ CD CD CH Balanced Preout Impedance Ω 80Ω Maximum Power 45Wx4 AMPLIFIER Full Bandwidth Power 22Wx4 at less than 1 THD TONE Bass 100Hz 10dB Treble 10kHz 10dB Operating Voltag...

Page 25: ...4 Wisma Academy Lot 4A Jalan 19 1 46300 Petaling Jaya Selangor Darul Ehsan Malaysia KRC X858 KRC 708 KRC 888 Frequency Range 87 9MHz 107 9MHz 87 9MHz 107 9MHz 87 5MHz 108 0MHz Frequency Step 200kHz 200kHz 50kHz Channel Space Selection 50k 200kHz 50k 200kHz 50k 200kHz Usable Sensitivity 9 3dBf 9 3dBf 9 3dBf S N 30dB 0 8µV 75Ω 0 8µV 75Ω 0 8µV 75Ω FM Quieting Sensitivity 15 2dBf 15 2dBf 15 2dBf S N 5...

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