Kenwood KDC-W4044UA Service Manual
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Kenwood KDC-W4044UA Service Manual

Cd receiver
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CD RECEIVER
KDC-W4044UA/W4044UAY
KDC-W4044UG/W4044UGY
KDC-W413UA/W413UAY
KDC-W4544U/W4644UY
SERVICE MANUAL
Panel assy
KDC-W4044Uxx (A64-4672-02)
Panel assy
KDC-W4544U (A64-4671-02)
* Remote controller assy (RC-557)
(A70-2087-15)
Lever
(D10-7049-04) x2
Escutcheon
(B07-3271-01)
* Depends on the model. Refer to the parts list.
KDC-W4044U
KDC-W4544U
Battery
(Not supplied)
DC cord
(E30-6800-05)
Mounting hardware assy
(J22-0789-03)
© 2008-11 PRINTED IN JA PAN
B53-0688-00 ( N ) 181
Panel assy
KDC-W413Uxx (A64-4673-02)
Panel assy
KDC-W4644UY (A64-4687-02)
TDF SPARE-PANEL
MAIN UNIT NAME
TDF PARTS No.
KDC-W4044UA
Y33-3022-71
KDC-W4044UAY
Y33-3022-71
KDC-W4044UG
Y33-3022-72
KDC-W4044UGY
Y33-3022-72
KDC-W413UA
Y33-3022-73
KDC-W413UAY
Y33-3022-73
KDC-W4544U
Y33-3022-70
KDC-W4644UY
Y33-3022-70
Carrying case
(W01-1710-05)
This product uses Lead Free solder.
RoHS
This product complies with the
KDC-W413U
KDC-W4644U
TDF NAME
TDF-W4044UA
TDF-W4044UA
TDF-W4044UG
TDF-W4044UG
TDF-W413UA
TDF-W413UA
TDF-W4544U
TDF-W4544U
directive for the European market.

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Summary of Contents for Kenwood KDC-W4044UA

  • Page 1 CD RECEIVER KDC-W4044UA/W4044UAY KDC-W4044UG/W4044UGY KDC-W413UA/W413UAY KDC-W4544U/W4644UY SERVICE MANUAL © 2008-11 PRINTED IN JA PAN B53-0688-00 ( N ) 181 Panel assy Panel assy KDC-W4044Uxx (A64-4672-02) KDC-W413Uxx (A64-4673-02) KDC-W4044U KDC-W413U Panel assy Panel assy KDC-W4544U (A64-4671-02) KDC-W4644UY (A64-4687-02) KDC-W4544U KDC-W4644U TDF SPARE-PANEL MAIN UNIT NAME TDF PARTS No.

  • Page 2: Block Diagram

    KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY BLOCK DIAGRAM ELECTRIC UNIT (X34- ) W500 R118 ANT. PHONE PHONE DME1 AM+B Q101 LX-BUS FRONT-END ACC-DET ACC DET MECHA SERVO+B Q103 BU-DET BU DET POWER Q102 DC-CN SURGE PHONE P STBY Q701-704 SP-OUT E-VOL MUTE FRONT L/R...
  • Page 3 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY BLOCK DIAGRAM MOTHER CD PLAYER UNIT (X32-6250-00) BOARD DPU1 (X34- ) SIGNAL A/B/C/E/F SRAM STB SRAM STB BUCK BUCK RF AMP VREF SERVO PIO0 PIO0 PROCESSOR FO COIL MP3 DECODER FO OUT LEVEL SHIFT FO OUT MRST MRST...
  • Page 4 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY COMPONENTS DESCRIPTION ● ELECTRIC UNIT (X34-623x-xx) Ref. No. Application / Function Operation / Condition / Compatibility System μ-COM Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone. E-VOL Controls the source, volume, tone. Power Supply IC Outputs 5V×2, 8.1V×2, 10.2V, P-CON, P-ANT.
  • Page 5 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY COMPONENTS DESCRIPTION ● CD PLAYER UNIT (X32-6250-00) Ref. No. Application / Function Operation / Condition / Compatibility Driver for focusing & tracking coil, driver for sled & spindle motor, and operation for disc 4ch BTL Driver loading & ejection.
  • Page 6 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY MICROCOMPUTER’S TERMINAL DESCRIPTION ● SYSTEM μ-COM: IC1 on X34- (ELECTRIC UNIT) Truth Value Pin No. Pin Name Application Processing Operation Description Table LX DATA M I/O Data to slave unit LX CLK I/O LX-BUS clock 125kHz~65kHz Not used Output L fi...
  • Page 7 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY MICROCOMPUTER’S TERMINAL DESCRIPTION Truth Value Pin No. Pin Name Application Processing Operation Description Table L: Possible to rewrite fl ash ROM Flash ROM EPM input Connects to VSS (Never set it to output Hi) CD MOTOR I/O CD motor control...
  • Page 8 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY MICROCOMPUTER’S TERMINAL DESCRIPTION Truth Value Pin No. Pin Name Application Processing Operation Description Table MUTE I/O Mute L: Mute OFF, Hi-Z: Mute ON BU detected: L, No BU or momentary power-down: H BU DET Momentary power-down detection (Operates below 4ms after momentary power-down...

  • Page 9: Test Mode

    KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE ■ Example Description of display Description Disc EJECT times display. MAX 65535 (times) Disc EJECT times display While disc EJECT times is displayed, press and hold for 2 ■5 seconds or longer to clear disc EJECT times.
  • Page 10 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE ■ Special displays when all lights are on in STANDBY source Description of display Description Common All lights ON. All lights ON. Destination terminal “TYPE” indicates system μ-com (IC1) destination, and shows E : 1 condition indication real-time condition of the destination terminal.
  • Page 11 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE Description of display Description Turns off all the lights → Turns on odd and even terminals Fluorescent indicator short alternatively every 125ms (terminals that have a maximum check number of grids) → Turns on only the odd terminals → Turn on only the even terminals →...
  • Page 12 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE Description of display Description CD time CD time code error count data (count not updated) mode display. code error count data Number of CD-DA count errors display XX: Number of errors. “– –” is displayed in case there is no error.
  • Page 13 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE Description of display Description Seek Stop Level adjustment 0.00(V) ↔ 5.00 (V) Normal (Local OFF) (Manual) (UP) Seek Stop Level (DOWN) adjustment 0.00(V) ↔ 5.00 (V) Normal (Local ON) (Manual) The display in the left column is shown when the data has Adjustment ■...
  • Page 14 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE About audio adjustment items (include both Audio Function Mode and Audio Setup Mode) Procedure Item Procedure Description Fader [VOL] knob and [ ] key Adjust to 3 steps of R15 ↔ 0 ↔ F15. (Default value: 0)
  • Page 15 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE While “– – – –” is displayed, power can be ON for 30 minutes. This mode is cancelled by resetting. (The last screen will not be retained.) Data to be cleared is shown below. CD mechanism error log display...
  • Page 16 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TEST MODE • Method of clearing the security code Procedure Display Description Press [ ] key for 3 seconds or longer Carry out the procedure while “– – – –” is being displayed. E : – – –...
  • Page 17 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY ROM DATA TRANSFER PROCESSES ■ Operation procedure When replacing front-end (A1) of mother unit (X34-), or when adding or replacing ROM correction (program correction Operation procedure is different depending on the with ROM IC (IC10)), the following activities are required.
  • Page 18 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY ROM DATA TRANSFER PROCESSES Turn power on. Install new front-end (A1). Press and hold the [1] and [3] keys and press reset button. No ROM correction or other data status. (Enter the system in the test mode.) Press [B.BOOST] key. (ROM data System enters data transfer mode.)
  • Page 19 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY ROM DATA TRANSFER PROCESSES 4. In case of applying a new ROM correction when front- Turn power on. end (A1) is replaced (There is ROM correction data.) Press and hold the [1] and [3] keys, press reset button. (Enter 5.
  • Page 20 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY ROM DATA TRANSFER PROCESSES Press key. (Exit ROM data transfer mode.) Turn power on. Turn power off. Press and hold the [1] and [3] keys press reset button. (Enter the system in the test mode.) Remove front-end (A1).
  • Page 21 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X16-647x-xx (J76-0551-02) X16-647x-xx (J76-0551-02) VOUT SW+5V USB-D- REMO USB-GND USB-D+ USB+5V X16-647x-xx X16-647x-xx Ref. No. Address Ref. No. Address AUX-R R101 C101 AUX-L USB-D- USB-D- AUX-GND...
  • Page 22 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY PC BOARD (COMPONENT SIDE VIEW) ELECTRIC UNIT X34-623x-xx (J76-0550-12) 13 11 12 8 4 3 2 9 10 6 C807 R803 R802 R801 C603 R118 D106 D606 D109 R112 C706 D401 W500 W801 IC950 C705 R809 C401 L401...
  • Page 23 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY W103 R101 W104 R102 D106 D107 D108 R110 X34-623x-xx Ref. No. Address IC51 IC51 IC52 IC251 IC252 IC900 IC950 IC52 Q101 Q103 Q104 Q701 Q702 R268 R261 R262 R263 R208 Refer to the schematic diagram for the values of resistors...
  • Page 24 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY PC BOARD (FOIL SIDE VIEW) ELECTRIC UNIT X34-623x-xx (J76-0550-12) R812 C857 C860 C855 C853 R808 R152 R111 R151 R114 R117 R115 R116 R401 R904 R969 SEL1 IC53 C915 C921 SEL2 R943 ROM-DET-M R941 C909 R253 C918 BOOT MRST...
  • Page 25 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY C872 R604 R701 X34-623x-xx Ref. No. Address IC53 R401 C921 A-DATA R501 R503 A-CLK Q102 T MRST Q105 S-METER Q301 Q705 Q902 Q903 Q905 C310 C311 C516 R348 R349 C515 Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 26 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY PC BOARD (COMPONENT SIDE VIEW) X32 B/2 12EJE CD PLAYER UNIT X32-6250-00 A/2 (J76-0556-02) 3.3V IOP- AGND RFRP BU1.5 D1.5V DGND S.GND D3.3V S.7.5V MOTOR ZDET SLED IN/EJECT SLED OUT/LOAD X32-6250-00 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 27 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY PC BOARD (FOIL SIDE VIEW) X32 B/2 CD PLAYER UNIT X32-6250-00 A/2 (J76-0556-02) C101 X32-6250-00 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 28 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY FRONT REAR/SUB TP91 LX BUS ELECTRIC UNIT (X34-6xxx-xx) W608 C871 C872 680P 680P R970 R971 MUTE R709 R710 R703 R704 DRIVER Q903 Q703 Q704 Q701 Q702 3.3V R911 for IC R604 D605 Q705 Q902 D604 D601 Q701-704 PRE-OUT...
  • Page 29 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY -6xxx-xx) iPod AUTHENTICATION COPROCESSOR NOT USED BU3.3V-2 BU3.3V-2 BU3.3V-2 3.3V BU3.3V BU3.3V TP905 3.3V 3.3V TP906 3.3V AVR for IC900 C917 C916 R908 C906 C905 C901 0.01 NC20 0.01 0.01 R909 1K X900 3.3V NC19 IC950 NC18 NC17...
  • Page 30 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY DC IN TP316 R806 R802 C809 5.6K MUTE CONTROL Q105 R966 TP905 TP907 D110 TP906 TP904 R965 6.9V 6.8V IC951 MUTE 6.9V 6.8V 6.9V Q104 14V SW R810 R811 POWER IC MUTE R120 R1 CONTROL R809 100K W801 3.3V...
  • Page 31 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY : 30622MGPB72FP DC IN F1 10A : E-TDA7719 (F52-0023-05) : BD4914-V4 : E-TDA7851A : E-TDA7478AD : S-80836CNNB-J IC10 NOT UESD P ANT IC51 : LT3684EMSE 2SB1565 IC52 : BD6538G D103 D101 IC53 : R1114N331B-TR IC251 : 74AHCT08PW R102...
  • Page 32 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY SWITCH UNIT (X16-6xxx-xx) ANODE CONNECTION 2GA,2GB 1GA,1GB NAME TP36 col1 col1 col2 REMOTE CONTROL SENSOR SW5V PAN5V LED+B 11.3V 11.3V col2 ILL D GND PAN5V LED+B XBLK FL+B FL+B 5.0V VFD CE OSCI VFD DATAM 3.0V DVDDCAP 11.3V...
  • Page 33 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY SWITCH UNIT (X16-6xxx-xx) DESTI- UNIT R31, R34, MODEL NAME D1-7,9 D8,11-14 D15-17 NATION U333 X16-6470-01 B30-1782-05 B30-1781-05 KDC-MP242U X16-6472-71 B30-1779-05 B30-1779-05 KDC-MP342U X16-6470-10 B30-1779-05 B30-1781-05 TP25 KDC-MP443U X16-6472-71 B30-1779-05 B30-1779-05 2009 KDC-MP5043U X16-6470-21 B30-1781-05 B30-1781-05 KDC-MP543U X16-6470-21 B30-1781-05...
  • Page 34 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY CD PLAYER UNIT (X32-6250-00) (A/2) MECHA. (X92-) SLED OUT /LOAD TP28 4ch BTL DRIVER 1.7V TP345 7.5V D1.5V POWVCC1 R58 100 TP26 LOADING & POWGND1 SLED IN SLED /EJECT TP346 MOTOR SLIN VO1- R59 200K SPDL+ VO1+ LDIN...
  • Page 35 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY TP44 FCS- TP47 TRK- D3.3V TP46 TRK+ D1.5V TP45 FCS+ TP111 RFRP TP84 DPU1 TP49 1.5V (X92- ) TP39 TP43 PD OPTICAL 2.2M TP42 C+D PICKUP R6 1K DVSS3R TP72 F 0.2V 1.6V TP41 A AVSS3 1.7V TP40 B DVDD3R 3.3V...
  • Page 36 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY EXPLODED VIEW (CD MECHANISM) : N09-6108-15 : N09-6426-15+ : N09-6735-05 : N09-6737-15 : N09-6738-15 : N19-2335-14 : N35-2003-48 : N39-1720-48 (X32) DPU1 (X32) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 37 KDC-W4044UA/W4044UAY/W4044UG/W4044UGY KDC-W413UA/W413UAY/W4544U/W4644UY EXPLODED VIEW (UNIT) Batteries for RC1 : N24-3015-48 : N35-2610-48 DME1 : N80-2006-48 : N80-2008-43 : N86-2604-43 : N86-2606-48 : N82-2606-48 : N83-3005-48 : N83-3016-48 : N86-2606-48 : N89-3010-48 (X34-) W500 (X34) (X34) (X16-) (X34-) Depends on the models. Refer to the parts list.

  • Page 38: Parts List

    PUSH KNOB (AM) RK73FB2B471J CHIP R J 1/8W E2E6 K24-4958-03 PUSH KNOB (DISP) RK73EB2E102J CHIP R 1.0K J 1/4W E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...
  • Page 39 CK73GB1C104K CHIP C 0.10UF CK73GB1E223K CHIP C 0.022UF K RK74GB1J103J CHIP-COM 10K J 1/16W CK73GB1H152K CHIP C 1500PF E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...
  • Page 40 R120 RK73GB2A104J CHIP R 100K J 1/10W C921 CC73GCH1H221J CHIP C 220PF R152 RK73GB2A000J CHIP R J 1/10W E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...
  • Page 41 RK73GB2A153J CHIP R J 1/10W R509 RK73GB2A512J CHIP R 5.1K J 1/10W R931 RK73GB2A100J CHIP R J 1/10W E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...
  • Page 42 DIGITAL TRANSISTOR G01-4686-14 EXTENSION SPRING KRC403-P DIGITAL TRANSISTOR G01-4688-14 EXTENSION SPRING KRA303-P DIGITAL TRANSISTOR G01-4692-24 TORSION COIL SPRING E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...
  • Page 43 PAN HEAD MACHINE SCREW S68-0921-05 PUSH SWITCH X94-2090-00 SPINDLE MOTOR ASSY X94-2100-00 FEED MOTOR ASSY (LOAD/SLED) DPU1 X93-2260-01 OPTICAL PICKUP ASSY E: KDC-W4544U E1: KDC-W4044UA E2: KDC-W4044UG E3: KDC-W413UA Indicates safety critical com po nents. E4: KDC-W4644UY E5: KDC-W4044UAY E6: KDC-W4044UGY E7: KDC-W413AY...

  • Page 44: Specifications

    Installation Size (W x H x D) .....182 x 53 x 155mm WMA decode .... Compliant with Windows Media Audio Weight ................1.3kg 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. DANGER: Please do not look at the laser beam directly during re pair or operation check.

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