Kenwood R-K731-B Service Manual
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Kenwood R-K731-B Service Manual

Compact hi-fi component system
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COMPACT HI-FI COMPONENT SYSTEM
R-K731-B, R-K731-S
SERVICE MANUAL
Front view
USB CONNECTOR
(E58-0121-08)
POWER BUTTON
(K29-8851-08): 731-B
(K29-8850-08): 731-S
FOOT
(J02-1602-08)
Rear view
AC CONNECTOR
(E03-0532-08)
SPEAKER TERMINAL
(E70-1045-08)
COPYRIGHT © 2011 Kenwood Corporation of Japan, Limited
DANGER:
Please do not lock at the laser beam directly
during repair or operation check.
WINDOW DISPLAY
(B10-5689-08)
VOLUME KNOB
(K29-8849-08): 731-B
(K29-8848-08): 731-S
TUNER
(W02-4721-08)
RCA CONNECTOR
(E63-1467-08)
2
2012
KA019<Rev.001>
SERVICE MANUAL
©
2012-2 PRINTED IN JAPAN
B53-4104-00
Accessories
FRONT PANEL
(A60-2616-08): 731-B
(A60-2615-08): 731-S
SELECT BUTTON
(K29-8853-08): 731-B
(K29-8852-08): 731-S
DIGITAL CONNECTOR
(W02-4709-08)
RCA CONNECTOR
(E63-1466-08)
PC CONNECTOR
(E58-0122-08)
This product complies with the RoHS directive for the European market.
KA019<Rev.001>
LOOP ANTENNA (x 1)
(T90-0950-08)
FM ANTENNA (x 1)
(T90-0949-08)
REMOTE CONTROL UNIT (x1)
[RC-RP0706E]
(A70-1772-08)
POWER CORD (x1)
(E30-7418-08)
This product uses Lead Free solder.

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Summary of Contents for Kenwood R-K731-B

  • Page 1 RCA CONNECTOR PC CONNECTOR (E70-1045-08) (E63-1467-08) (E58-0122-08) COPYRIGHT © 2011 Kenwood Corporation of Japan, Limited DANGER: Please do not lock at the laser beam directly This product uses Lead Free solder. during repair or operation check. This product complies with the RoHS directive for the European market.

  • Page 2: Resetting The Microcomputer

    • Connecting the digital audio player using the dedicated cable PNC-150 allows you to operate the digital audio player using the main unit or the remote control. Compatible Kenwood digital audio players HDD audio player Memory audio player HD20GA7...
  • Page 4 R-K731 AMP (SIDE A) AMP (SIDE B) HS401 C496 R590 FB584 R587 C596 C594 C595 FB585 R588 R589 C593 C493 C494 C500 R479 C495 C499 C498 R478 C438 C434 FB407 R426 FB406 R427 C433 C427 C472 C423 R419 C424 C426 R418 R434 C420...
  • Page 5 R-K731 CD (SIDE A) L1621 C1516 C1513 CP1601 C1519 R1798 R1799 R1700 C1698 R1797 L1620 R1785 R1789 R1788 R1695 C1697 C1518 R1694 R1794 R1787 R1784 R1691 R1791 R1658 C1517 R1668 R1786 R1666 C1611 R1790 R1690 R1662 C1658 C1607 R1686 R1684 C1644 C1507 C1506...
  • Page 6 R-K731 DSP (SIDE A) DSP (SIDE B) CP203 CP204 R253 C256 R254 R310 R309 C334 Q335 C338 Q330 Q327 R331 C335 C316 FB301 FB331 Q334 FB326 FB325 R342 R364 R325 C325 C345 C332 R339 R322 FB330 Q336 R321 FB329 R302 R320 FB328 C308...
  • Page 7 R-K731 FRONT (SIDE A) FL801 LD801 CP802 RMC801 J814 LD802 C813 J818 J802 J803 ZD801 J810 J808 SW882 SW884 FRONT (SIDE B) R854 RMC801 IC801 R850 R849 R855 R848 R852 R856 R847 R844 R845 R846 CP802 R857 C817 C816 R868 C818 C804 R858...
  • Page 8 R-K731 POWER (SIDE A) POWER (SIDE B) R781 R782 C625 R608 C611 C601 C717 ZD602 ZD612 R619 C606 C605 R616 R617 C629 C630 C636 R610 CN653 C641 R633 R643 CN651 R641 L730 C737 C740 C749 C750 R792 D708 C763 C764 R795 C707 D711 R721...
  • Page 9 R-K731 JACK 1 (SIDE A) JACK 1 (SIDE B) RLY782 RLY781 FB661 R661 R667 R680 R666 C785 R670 C668 FB602 C786 FB601 C666 R669 R663 CN615 JACK 2 (SIDE A) JACK 2 (SIDE B) FB798 FB796 R683 FB789 C682 FB792 FB793 R682 R707...
  • Page 10 R-K731 AMP 1 CP401 SGND DGND IC491 HP_DET +5VD SVCC33 DGND R402 PWM_MCLK R453 AMP_DATA0 PWM_LRCK PWM_DOWN R454 PWM_BCK PWM_RST PWM_SDA PWM_SCL R413 PWM_DOWN SVCC33 R414 AMP_FAULT DGND DGND +5VD DGND DGND +5VD D_CTRL SP_RLY_CTL DGND R416 R434 FB402 IC402 AMP_DATA0 R418 FB403...
  • Page 11 R-K731 C453 C454 R404 C458 Q419 C457 R445 R444 L401 LCH_SPK+ Q420 C405 C403 R403 C408 IC401 R407 C410 D402 R410 D401 AMPGND1 R456 C469 C416 R455 C451 C419 C417 C420 L402 LCH_SPK- DGND CP431 To POWER CN651 CP421 FB408 To POWER R422 C424...
  • Page 12 R-K731 AMP 2 CN582 AUX_R AGND AUX_L AGND7 AGND6 FB584 AGND6 REC_L_O REC_L_OUT R587 AGND8 FB585 REC_R_O REC_R_OUT R588 CP581 AGND6 SW_OUT SW_OUT LCH_SPK+ LCH_SPK- AMPGND2 LCH_SPK+ RCH_SPK+ LCH_SPK- AMPGND2 RCH_SPK- RCH_SPK+ RCH_SPK- RLY_L RLY_L RLY_H RLY_H FB561 R570 C561 AGND7 C571 CP561...

  • Page 13: Audio Select

    R-K731 AUDIO SELECT AUX_R_IN AUX_R AUX_L IC481 C481 _OUT C482 R483 C483 R484 C484 C485 C486 _OUT R485 C487 R487 R486 C488 DAUDIO_L R488 C489 C490 R490 R489 R491 C495 RLY_L C501 C500 Q418 R479 SP_RLY_CTL C496 C497 C493 C491 RLY_GND C494 C492...
  • Page 14 R-K731 D1602 L1607 R1627 IC1602 IC1605 C1663 RA1603 RA1602 C1659 L1619 RA1601 C1662 RA1604 C1660 C1630 C1661 C1615 R1631 R1633 C1610 C1637 C1626 C1616 R1734 C1657 R1728 IC1611 C1671 C1601 IC1606 R1624 R1675 C1655 R1682 R1673 R1745 R1604 R1730 R1613 C1602 C1605 R1634...
  • Page 15 R-K731 C1629 C1628 C1636 X1601 R1669 R1640 R1693 C1647 C1645 R1632 CP1602 R1642 R1712 R1713 R1715 R1711 R1714 R1709 R1681 R1689 R1710 C1653 Q1602 C1638 C1640 C1656 IC1601 C1679 R1619 C1624 C1625 C1648 R1653 R1655 C1652 C1642 C1651 C1641 R1636 R1645 R1644 R1650...
  • Page 16 R-K731 DSP 1 HP_PWR AGND IC271 C272 R271 C271 4052_R_IN C274 +5VA HP_R_OUT C280 AGND C276 C282 R315 4052_L_IN SDATA1 R272 DGND R316 DAC_BCK_HP R317 DAC_LRCK_HP R318 ADC_MCLK DAC_MCLK_HP ADC_LRCK ADC_BCK ADC_DOUT FB249 R231 DAC_MCLK_REC FB252 DAC_MCLK_SW C231 FB251 DAC_MCLK_HP C232 DGND FB250...
  • Page 17 R-K731 Head Phone HP_PWR R301 AGND R302 C346 C302 C303 R303 HP_MUTE +5VA R365 Q334 HP_R_OUT C304 R334 R367 R304 R305 R339 C305 C306 R369 AGND R307 IC301 R306 R337 R338 R308 R315 C307 R309 R316 Q333 R317 IC303 IC302 AGND R318 R319...
  • Page 18 R-K731 DSP 2 FB201 CP201 C201 MA_CD_RX C202 MA_CD_TX DGND C203 FB202 MA_CD_RST R261 CD_SPDIF 3V3D Q201 C261 AMP_RLY_CTL R201 C262 PWR_RLY_CTL C208 C228 MA_PWRSNS C209 AMP_CTL1 C210 AMP_CTL2 C229 DGND R228 +5VD DGND FB213 3V3S DSP_MCLK R215 FB203 SGND R203 MA_PLL_CTRL1 DGND...
  • Page 19 R-K731 B201 C201 C202 C203 Q201 CP203 SGND DGND MA_HP_SELECT_IN FB204 R216 SDATA3 DGND FB205 R217 SDATA2 AMP_MCLK IC201 FB206 R218 SDATA1 SDATA0 R219 FB208 To AMP 1 SDATA0 AMP_LRCK FB209 R211 CP401 AMP_BCK AMP_BCK R212 DAC_BCK_HP MA_SYSRST R213 FB215 DAC_BCK_SW MA_I2C_SDA R214...
  • Page 20 R-K731 DSP 3 U_A_DP 3V3D R385 R383 Q371 R386 AUD_DET R387 Q372 To AMP 2 CP461 DGND 3V3D OPT1_SPDIF DGND R371 OPT2_SPDIF DGND AUD_DET PC_5V DGND U_A_DN U_A_DP U_A_SPDIF DGND 3V3D IC371 CP371 C371 3V3D ZD371 U_A_DP U_A_DN PC_5V DGND...
  • Page 21 R-K731 PC IN R372 FB371 IC372 R378 R379 C372 X371 C375 R380 C377 C376 C379 C378...
  • Page 22 R-K731 FRONT ZD801 C815 CN801 DGND_FL2 FL_RMCN C801 C814 R859 R868 R854 RMC801 R852 CP802 R855 FL_FLCE FL_CLK R856 FL_DATA FL_FLRST R857 ADKEY2_KEY ADKEY1_KEY R858 FL_ENCOD_B FL_ENCOD_A R864 R867 DGND_FL1 R863 LD801 Q802 Q801 CN803 LD802 SW882 J808 J816 R882 J802 J809 J817...
  • Page 23 R-K731 FL801 C818 FL_GR1 FL_SG35 R853 FL_SG34 FL_SG33 FL_SG32 FL_SG31 IC801 FL_SG30 FL_SG29 FL_SG28 FL_SG27 FL_SG26 FL_SG25 FL_SG24 FL_SG23 FL_SG22 FL_SG21...
  • Page 24 R-K731 POWER Q601 R622 CN651 CN601 To AMP 1 CP431 AMPGND1 +25.8V1 CP601 CN652 To AMP 1 CP411 AMPGND2 +25.8V2 L601 CN653 R609 ZD601 To AMP 1 CP421 C612 12V_ARLY R611 C610 ZD611 CP723 R612 Q604 R617 R619 Q605 IPOD_VCC R620 C615 CP772...
  • Page 25 R-K731 CP716 C601 BD601 F710 JACK701 AMP1+37.8V C604 F710 (SS-5) C717 C602 C605 EUROPE : RLY715 R608 T2AL/250V ZD601 ZD603 ZD602 C606 JAPAN : D715 T4AL/250V ZD611 ZD612 ZD613 R616 BD602 C611 Q715 C616 R621 RLY601 Q606 CP721 D625 AMP_RLY_CTL F701 F702 F703...
  • Page 26 R-K731 JACK FB661 JK781 R661 SF661 FB662 C663 R662 IC661 C664 R663 FB663 SF662 AGND2 IC661 C667 FB664 C670 R667 CN615 FB665 To AMP 1 R666 AGND2 CP415 FB666 C671 C672 R668 JK782 FB784 R677 FB786 R678 JK783 FB787 R679 FB788 R680 CP781...
  • Page 27 R-K731 TUNER To AMP 2 CN582 TN791 CP793 CP782 R648 R649 R650 R651 R652 R653 R654 R655 C798 C799 R656 R657 R658 R659 R660 CP792 To DSP 2 CP381 To FRONT CN803 CP881 SW881 SW883 To POWER CP723 CN723 SW887 SW885 C767 SW888...

  • Page 29: General Assembly

    R-K731 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  B10-5689-08 WINDOW DISPLAY K29-8849-08 KNOB ASSY K29-8848-08 KNOB ASSY A60-2616-08 PANEL FRONT A60-2615-08 PANEL FRONT B43-0347-08 BADGE G11-3059-08 SHEET DOOR B19-1712-08 LENS BLUE LED K29-8853-08 BUTTON SELECT K29-8852-08 BUTTON SELECT...

  • Page 30: Electrical Parts List

    R-K731 Electrical parts list CD board  Symbol No. Part No. Part Name Description Local Block No. [0][1] C1632 CK73GB1H104K C CAPACITOR 0.1uF 50V  Symbol No. Part No. Part Name Description Local C1633 CK73GB1A684K C CAPACITOR 0.68uF 10V C1634 CK73GB1H104K C CAPACITOR 0.1uF 50V...
  • Page 31 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R1620 RK73GB2A101J MG RESISTOR 100Ω 1/16W R1622 RK73GB2A102J MG RESISTOR 1kΩ 1/16W R1696 RK73GB2A472J MG RESISTOR 4.7kΩ 1/16W R1623 RK73GB2A101J MG RESISTOR 100Ω...

  • Page 32: Front Board

    R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local L1602 L92-0890-08 COIL R855 RK73GB2A101J MG RESISTOR 100Ω 1/16W L1604 RK73GB2A000J MG RESISTOR 0Ω 1/16W R856 RK73GB2A101J MG RESISTOR 100Ω 1/16W L1607 L92-0906-08 COIL...
  • Page 33 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C492 CK73GB1H104K C CAPACITOR 0.1uF 50V C421 CK73GB1H104K C CAPACITOR 0.1uF 50V C422 CK73GB1H104K C CAPACITOR 0.1uF 50V C493 CK73GB1H104K C CAPACITOR 0.1uF 50V C423 CK73GB1H104K...

  • Page 34: Display Board

    R-K731 Display board  Symbol No. Part No. Part Name Description Local Block No. [0][4] R477 RK73GB2A474J MG RESISTOR 470kΩ 1/16W R478 RK73GB2A300J MG RESISTOR 30Ω 1/16W  Symbol No. Part No. Part Name Description Local R479 RK73GB2A300J MG RESISTOR 30Ω...
  • Page 35 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C109 CK73GB1H104K C CAPACITOR 0.1uF 50V C247 CK73GB1H104K C CAPACITOR 0.1uF 50V C110 CE32BJ1H3R3M C CAPACITOR 3.3uF 50V C248 CC73GCH1H220J C CAPACITOR 22pF 50V C251 C90-5906-08...
  • Page 36 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C347 C90-5954-08 C CAPACITOR 1uF 50V R137 RK73GB2A101J MG RESISTOR 100Ω 1/16W C351 C90-5901-08 C CAPACITOR 10uF 16V R138 RK73GB2A101J MG RESISTOR 100Ω...
  • Page 37 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R315 R92-4844-08 MG RESISTOR 300Ω 1/16W R215 RK73GB2A000J MG RESISTOR 0Ω 1/16W R216 RK73GB2A560J MG RESISTOR 56Ω 1/16W R316 RK73GB2A271J MG RESISTOR 270Ω...

  • Page 38: Power Board

    R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R393 RK73GB2A103J MG RESISTOR 10kΩ 1/16W FB331 L92-0889-08 COIL R394 RK73GB2A104J MG RESISTOR 100kΩ 1/16W FB351 L92-0889-08 COIL FB352 L92-0889-08 COIL CP202 E41-4135-08 CONNECTOR...
  • Page 39 R-K731  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local  D723 1SR154-400 DIODE  D724 1SR154-400 DIODE C751 C90-6140-08 C CAPACITOR 3300uF 16V D725 1SR154-400 DIODE C752 C90-6138-08 C CAPACITOR 2200uF 10V C753 C90-6143-08...

  • Page 40: Speaker Board

    R-K731 Speaker board  Symbol No. Part No. Part Name Description Local Block No. [0][8] L730 L90-0552-08 COIL  T701 L07-3422-08 POWER TRANS  Symbol No. Part No. Part Name Description Local  BD601 GBJ1006 DIODE  BD602 GBJ1006 DIODE IC661 AZ4580M-TRE1 ...

  • Page 41: Usb Board

    R-K731 USB board Key board Block No. [0][9] Block No. [1][0]  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local IC681 AZ4580M-TRE1 C881 CK73GB1H103K C CAPACITOR 0.01uF 50V IC691 LM39102D-ADJ C882 CK73GB1H103K C CAPACITOR 0.01uF 50V...

  • Page 42: Specifications

    SUB WOOFER PRE OUT ........2 V / 1 kΩ Notes: LINE (AUX) ............. 2 V / 1 kΩ • Kenwood follows a policy of continuous advancements in- development. For this reason specifications may be [Digital unit] changed without notice.

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