Kenwood KDC-4551UB/455UW Service Manual
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Kenwood KDC-4551UB/455UW Service Manual

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CD RECEIVER
KDC-4551UB/455UW
KDC-4651URY
KDC-U449/U5049
SERVICE MANUAL
Tuner setting adjustment after replacing E2PROM
After replacing E2PROM (IC771 on X34), tuner setting adjustment is needed.
The adjustment is that to perform the "TUNER Setting Adjustment Mode" (Page 5)
in the "Tuner Test Mode Specification" of "Production Test Mode".
KDC-4451UB : Panel assy (GE20277-001A)
KDC-4651URY : Panel assy (GE20280-015A)
KDC-U5049 : Panel assy (GE20277-010A)
Mounting sleeve assy
(GE34134-001A)
* Tap screw (2x8)
* Screw set
(N80-2008-43)
(N99-1757-15)
* Depends on the model. Refer to the parts list.
KDC-4551U
KDC-4651U
KDC-U5049
* Car cable
* Car cable
(E30-6937-05)
(QAM1341-001)
Hook
(GE40510-001A) x2
© 2010-12 PRINTED IN JA PAN
B53-0835-00 ( N ) 223
KDC-455UW : Panel assy (GE20277-002A)
KDC-U449 : Panel assy (GE20277-007A)
TDF SPARE-PANEL
MAIN UNIT NAME
TDF PARTS No.
KDC-4551UB
Y33-3382-71
KDC-455UW
Y33-3382-72
KDC-4651URY
Y33-3382-73
Y33-3380-21
KDC-U449
KDC-U5049
Y33-3383-01
* Carrying case
(W01-1710-05)
* Hard case assy
(A02-2757-13)
This product uses Lead Free solder.
RoHS
This product complies with the
KDC-455U
KDC-U449
TDF NAME
TDF-4551UB
TDF-455UW
TDF-4651URY
TDF-U449
TDF-U5049
* Remote control unit (RC-405)
(A70-2104-05)
Trim plate
(GE20274-001A)
directive for the European market.

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  • Page 1 CD RECEIVER KDC-4551UB/455UW KDC-4651URY KDC-U449/U5049 SERVICE MANUAL © 2010-12 PRINTED IN JA PAN B53-0835-00 ( N ) 223 Tuner setting adjustment after replacing E2PROM After replacing E2PROM (IC771 on X34), tuner setting adjustment is needed. The adjustment is that to perform the “TUNER Setting Adjustment Mode” (Page 5) in the “Tuner Test Mode Specification”...
  • Page 2 ELECTRIC UNIT (X34- ) IC301 D891 SW3.3V PHONE PHONE TUNER POWER ATOMIC BU3.3V IC161 Q970 ∗ J321 ∗ BU DET BU DET Q321,341 CN901 MUTE E-VOL Q971 DC-CN RCA-OUT MUTE SURGE- PHONE IC771 BU5V ∗ SP-OUT Q780 E2PROM BU DET BU3.3V MUTE IC901...

  • Page 3: Test Mode

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE 1. Panel SEARCH ACCENT RETURN 2. How to enter each Test Mode Test Mode name Operation Production Test Mode Press and hold [1] key and [3] key and reset. In the STANDBY source, while pressing and holding [2] key, press [6] key for 7 seconds.
  • Page 4 KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE ● Mode structure Some Test Modes change according to the current source. The following table shows the current source in Set and the related test mode status. KWD model source Test mode POWER OFF Standby STANDBY Test Mode...
  • Page 5 KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE Status Display content Details For models that TUNER adjustment is necessary but not done Adjustment not (adjustment value: 0x00 or 0xFF), the following TUNER Test 7 . 9 ∗ ∗ implemented Mode functions are valid (“∗ERR∗” display is continuing).

  • Page 6: Service Test Mode

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE 4. Operation of return to TUNER Test Mode Operation Display content Details RETURN Mode release Return to TUNER Test Mode. ● BAND switch list Type BAND1 BAND2 BAND3 BAND4 BAND5 BAND6 Details qFM1 wMW/LW q→w→q… qFM1...
  • Page 7 KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE ● Mode content Syscon shall display the following information after entering this mode. The operation shown below shall be workable. Display content Details The display is released when another operation is executed. ● Common operation mode for only STANDBY sources...

  • Page 8: Dc Error Information Mode

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 TEST MODE Operation Display content Details Move CD time code error count information (count not up- between dated) mode display BAND CD time code error CD-DA error count numbers (Forward count information xx: numbers of errors and “--” when there is none...
  • Page 9 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (FOIL SIDE VIEW) CD PLAYER UNIT X32-6430-00 A/2 (LVB11003-001A) CN102 X32 B/2 REST MGND Refer to the schematic diagram for the values of resistors and capacitors.

  • Page 10: Electric Unit

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (FOIL SIDE VIEW) R305 ELECTRIC UNIT C901 R780 X34-691x-xx B309 C314 (GEB10301-201A) B310 D782 R781 C311 C312 IC301 ANTENNA PRE OUT B921 C368 J321 B920 R307 C351 B313 B919 C321 C309 C341 R351 R342 R332 R321...
  • Page 11 KDC-4551UB/455UW/4651URY KDC-U449/U5049 CN901 J120 C891 R894 R132 D704 C132 R882 B922 R122 C130 B907 C881 R131 B906 R121 B905 C910 C120 D123 C913 C131 C906 C914 X34-691x-xx R907 Ref. No. Address R424 C904 R983 C988 IC931 IC80 R883 C903 R442...

  • Page 12: Switch Unit

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X16-704x-xx (GEB10302-002A) X16-704x-xx (GEB10302-002A) R685 D667 D669 CN603 D668 D680 R686 D666 C684 C672 C671 R683 D683 D684 R687 D678 C683 D679 D677 R612 R611 C610...
  • Page 13 KDC-4551UB/455UW/4651URY KDC-U449/U5049 ELECTRIC UNIT (X34-69xx-xx) CD 3.3 IC530 DPU1 (X92-) VREF 3.3V OPTICAL PICKUP CTRL R501 CD 1.5 IC531 IC501 3.3V CTRL 1.6V 1.6V 1.6V 3.0V 1.6V 3.2V TRACKING TRK- COIL CD 1.5 IC532 TRK+ 2.2V FOCUS+ C511 C512 FOCUS...
  • Page 14 KDC-4551UB/455UW/4651URY KDC-U449/U5049 ANT. A9V-1 4.7uH 100u16 C723 CD 3.3V 0.047 EPROM IC771 4.7V VDD5V 3.3V 3.3V VOUT WPIN R779 3.2V R778 ∗ FM/AM 1.3V 2.2V TUNER CD 1.5V 5.6V 5.1V R530 3.2V 2.2V 1.5V 3.1V VOUT ∗ IC80 iPod CP ∗...
  • Page 15 KDC-4551UB/455UW/4651URY KDC-U449/U5049 R168 A9V-2 C172 3.3V USB5V 100u10 5.0V IC961 HI SIDE 3.2V DC-DC USB5V L983 D983 5.0V FL+B D982 TP21 L985 IC161 LINE MUTE L981 R493 C984 22uH 3.3V 5.1V IC981 3.3V 3.3V E-VOLUME R783 5.2V D981 L982 3.3V...
  • Page 16 0.5V Q952,981 : RT1N441C-X Q971 Q970 D971 VFDCLK Q970,971 : 2SC1623A/5-6/X VFDCE SYSDA SIGNAL LINE GND LINE USBGND B LINE SURGE C913 330u6.3 L101 USB5V USB5V L102 ∗ ∗ VDD5V R903 R902 FL+B FL+B PANDAT CNDET KDC-4551UB/455UW/4651URY/U449/U5049 (1/2) X34-691x-xx (4/4)
  • Page 17 11.5V (ACCENT) ACC3.3V S603 AUX G AUX R AUX L DIMMER J602 CN603 C682 27P C681 27P D686 D685 DIMMER LF601 KDC-4551UB/455UW/4651URY/U449/U5049 (2/2) (X16-704x-xx) D653,654,656-658, R653,654, UNIT DESTI- D652,655,659, R658, R673, CATEGORY MODEL NAME 660-663,671, D664 D670 D672,673,676,679 IC602 R648...
  • Page 18 KDC-4551UB/455UW/4651URY KDC-U449/U5049 EXPLODED VIEW (CD MECHANISM) Grease : W01-1737-08 : W01-1738-08 : W01-2007-08 DPU1 (X32-) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 19: Exploded View (Unit)

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 EXPLODED VIEW (UNIT) DME1 : GE40377-002A : N86-2604-48 : N86-2606-48 : N80-2006-48 : N80-2008-48 : GE40377-005A : N82-2606-48 : QYSDSG3006ZA : N86-2608-48 : N86-2610-48 (X34) (X34) F901 (X16-) (X34-) Depends on the models. Refer to the parts list.

  • Page 20: Parts List

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST ✽ New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No. Description Ref.

  • Page 21: Switch Unit (X16-704X-Xx)

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST SWITCH UNIT (X16-704x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R617,618 RK73GB2A000J CHIP R J 1/10W CC73GCH1H150J CHIP C 15PF R622 RK73GB2A000J CHIP R J 1/10W CC73GCH1H040C CHIP C 4.0PF...

  • Page 22: Electric Unit (X34-691X-Xx)

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST ELECTRIC UNIT (X34-691x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C533-535 CK73GB1C104K CHIP C 0.10UF C914 CK73GB1H472K CHIP C 4700PF C540 CK73GB1C104K CHIP C 0.10UF C931 CK73GB1C104K CHIP C 0.10UF...
  • Page 23 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST ELECTRIC UNIT (X34-691x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation RK73GB2A472J CHIP R 4.7K J 1/10W R504 RK73EB2E513J CHIP R J 1/4W RK73FB2B470J CHIP R J 1/8W R505 RK73GB2A223J...
  • Page 24 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST ELECTRIC UNIT (X34-691x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R725-728 RK73GB2A473J CHIP R J 1/10W R930 RK73FB2B000J CHIP R J 1/8W R730,731 RK73GB2A473J CHIP R J 1/10W R941...
  • Page 25 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST ELECTRIC UNIT (X34-691x-xx) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation Q321 IMX9 P TRANSISTOR 1B ✽ LV36819-502A CLAMPER Q341 IMX9 P TRANSISTOR E3M1C1 LV38954-501A R.ARM GUIDE Q540 2SA2188/F/-X SS TRANSISTOR 2A ✽...
  • Page 26 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PARTS LIST CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc.

  • Page 27: Specifications

    KDC-4551UB/455UW/4651URY KDC-U449/U5049 SPECIFICATIONS ■ Models for destination “M” and “C” USB interface USB standard ........USB1.1/2.0 (Full speed) FM tuner section Maximum supply current ..........500mA Frequency range File system ............. FAT16/32 200kHz space ........87.9MHz~107.9MHz MP3 decode ..Compliant with MPEG-1/2 Audio Layer-3 50kHz space ........
  • Page 28 MP3 decode ..Compliant with MPEG-1/2 Audio Layer-3 WMA decode .... Compliant with Windows Media Audio AAC decode ..........AAC-LC “.m4a” fi les KENWOOD follows a policy of continuous advancements in development. For this reason specifi cations may be changed without notice.
  • Page 29 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (FOIL SIDE VIEW) CD PLAYER UNIT X32-6430-00 A/2 (LVB11003-001A) CN102 X32 B/2 REST MGND...
  • Page 30 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (FOIL SIDE VIEW) R305 CN901 ELECTRIC UNIT C901 R780 X34-691x-xx J120 C314 B309 (GEB10301-201A) C891 B310 D782 R894 R132 R781 C311 C312 D704 ANTENNA PRE OUT IC301 C132 R882 B921 C368 J321 B920 R307 B922 B313...
  • Page 31 KDC-4551UB/455UW/4651URY KDC-U449/U5049 PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X16-704x-xx (GEB10302-002A) X16-704x-xx (GEB10302-002A) R685 D667 D669 CN603 D680 D668 R686 D666 C684 C672 C671 R683 D683 D684 R687 D678 C683 D679 D677 R612 R611 C610...
  • Page 32 VFDCE IC702 SYSDA SIGNAL LINE RESET GND LINE USBGND C559 B LINE C717 SURGE C913 4.7V C715 C933 330u6.3 L101 USB5V USB5V VDD5V L102 ∗ ∗ VREF R903 R902 FL+B FL+B D1.5V D3.3V PANDAT CNDET uCOM3.3V uCOM3.3V uCOM3.3V KDC-4551UB/455UW/4651URY/U449/U5049 (1/2)
  • Page 33 11.5V (ACCENT) ACC3.3V S603 AUX G AUX R AUX L DIMMER J602 CN603 C682 27P C681 27P D686 D685 DIMMER LF601 KDC-4551UB/455UW/4651URY/U449/U5049 (2/2) (X16-704x-xx) D653,654,656-658, R653,654, UNIT DESTI- D652,655,659, R658, R673, 660-663,671, D672,673,676,679 656,657, CATEGORY MODEL NAME D664 D670 IC602...

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