Kenwood KDC-225/MR Service Manual
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Kenwood KDC-225/MR Service Manual

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CD RECEIVER
KDC-225/MR
QQ
3 7 63 1515 0
KDC-2025
SERVICE MANUAL
Panel assy
KDC-225 (A64-3172-02)
Panel assy
KDC-225MR (A64-3361-02)
TE
L 13942296513
Panel assy
KDC-2025 (A64-3305-02)
DC cord
(E30-6322-05)
(E30-6323-05)
www
Screw set
(N99-1719-05)
.
* Depends on model. Refer to the parts list.
AUD
OFF
AME
AUTO
AUD
OFF
AME
AUTO
AUD
OFF
AME
AUTO
* Escutcheon
Mounting hardware assy
(B07-3097-02)
(J21-9716-03)
(B07-3098-02)
x
ao
y
*
Not supplied
* Remote controller assy
(A70-2040-05) : RC-505
i
8
CD mechanism extension cord (24PIN) : W05-0934-00
Front glass
KDC-225 (B10-4465-01)
SCAN
RDM
REP
Front glass
KDC-225MR (B10-4559-01)
Q Q
3
6 7
1 3
SCAN
RDM
REP
Front glass
KDC-2025 (B10-4548-01)
SCAN
RDM
REP
Lever
(D10-4589-04) x 2
u163
.
TDF PANEL INFORMATION
MODEL
KDC-225
KDC-225MR
KDC-2025
2 9
9 4
2 8
© 2003-12 PRINTED IN JAPAN
B53-0112-00 ( N ) 764
+
C.S.
-
SCRL
M.RDM
CLK
ADJ
+
-
CRSC
1 5
0 5
8
2 9
9 4
M.RDM
DISP ADJ
+
-
CRSC
M.RDM
CLK
ADJ
Screw
(N84-4016-46)
m
co
PARTS NO.
PANEL NAME
Y33-1940-60
TDF-42D
Y33-1940-62
TDF-42DMR
Y33-1940-61
TDF-42DB
9 9
2 8
9 9
Plastic cabinet assy
(A02-1486-13)

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Summary of Contents for Kenwood KDC-225/MR

  • Page 1 CD RECEIVER KDC-225/MR 3 7 63 1515 0 KDC-2025 SERVICE MANUAL © 2003-12 PRINTED IN JAPAN B53-0112-00 ( N ) 764 CD mechanism extension cord (24PIN) : W05-0934-00 Panel assy Front glass KDC-225 (A64-3172-02) KDC-225 (B10-4465-01) C.S. SCRL M.RDM SCAN...
  • Page 2 3 7 6 3 1 5 1 5 0 L 1 3 9 4 2 2 9 6 5 1 3 u 1 6 3...

  • Page 3: Components Description

    KDC-225/225MR/2025 COMPONENTS DESCRIPTION 3 7 63 1515 0 SWITCH UNIT (X16-2640-11/12) Ref. No. Application / Function Operation / Condition / Compatibility LCD driver Drive for LCD unit Remote control IC Receiving for the remote control unit KEY scan detector key scan start at base gose “L”. ELECTRIC UNIT (X25-9980-11/12/21) Ref.

  • Page 4: Cd Player Unit (X32-5400-00)

    KDC-225/225MR/2025 COMPONENTS DESCRIPTION 3 7 63 1515 0 CD PLAYER UNIT (X32-5400-00) Ref. No. Application / Function Operation / Condition / Compatibility Generation of RF signal based on the signals from the APC circuit and pickup, and generation RF amplifier adapted for CD-RW of servo error (focusing error and tracking error) signals.

  • Page 5: Microcomputer's Terminal Description

    KDC-225/225MR/2025 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 SYSTEM MICROPROCESSOR : 784225GC233A (X25 : IC1) Pin No. Pin Name Description / Processing Operation TUN SMETER S meter detection input terminal RDS NOISE FM noise detection input terminal LINE MUTE Phone Muting signal input terminal (More than 2.5V : NAVI mute, Less than 1.0V : TEL mute) AVSS L RST...
  • Page 6 KDC-225/225MR/2025 MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Description / Processing Operation PS2 0 Power supply IC control terminal PS1 0 Power supply IC control terminal PS1 1 Power supply IC control terminal PS1 2 Power supply IC control terminal PON 5 SW5V/SW14V control output terminal...

  • Page 7: Test Mode

    KDC-225/225MR/2025 TEST MODE 3 7 63 1515 0 1. How to enter test mode 6. AUDIO function While holding the FM key and PRESET 6 keys, reset the • Audio-related specifications unit. • A short press of the Q key initiates the audio adjustment All display segments light up when the test mode is en- mode.
  • Page 8 KDC-225/225MR/2025 3 7 63 1515 0 PC BOARD (FOIL SIDE VIEW) ELECTRIC UNIT X25-9980-11/12/21 (J76-0016-02) W152 W173 W140 W241 W166 W174 D252 W203 D254 W227 L2/W239 W135 W228 W137 C251 C257 W229 C253 C255 C254 C252 C256 R273 R272 W156 W177 R256 D526...
  • Page 9 KDC-225/225MR/2025 3 7 63 1515 0 W241 10 9 W115 C351 Q352 Q351 W106 C303 C352 C251 W112 Q350 D310 R507 D308 D502 D311 R502 D309 R504 R506 D307 R505 R503 D503 D501 L 13942296513 C209 W103 W104 IC11 R101 R102 W105 X25-9980-11/12/21...

  • Page 10: Pc Board (Component Side View)

    KDC-225/225MR/2025 3 7 63 1515 0 PC BOARD (COMPONENT SIDE VIEW) CD PLAYER UNIT X32-5400-00 (J74-1486-12) L 13942296513 X32-5400-00 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors. u163...
  • Page 11 KDC-225/225MR/2025 3 7 63 1515 0 PC BOARD (FOIL SIDE VIEW) CD PLAYER UNIT X32-5400-00 (J74-1486-12) B/TE VDET TRCRS RFENV NRFDET D/ARF GCTL VREF2 D.OUT SPDL- SLED IN/EJECT /MUTER /MUTEL SLED OUT/LOAD /MSTOP /MRST R100 L 13942296513 MOTOR SPDL+ LO/EJ Lch A.+8V S7.5V A.GND...
  • Page 12 KDC-225/225MR/2025 PC BOARD 3 7 63 1515 0 (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) SWITCH UNIT SWITCH UNIT X16-2640-11/12 (J74-1561-02) X16-2640-11/12 (J74-1561-02) L 13942296513 L-RES L-DATAL L-CE L-CLK L-DATAS REMO SW5V X16-2640-11/12 X16-2640-11/12 R29/C12 Ref. No. Address Ref. No. Address R24 R25 R27 R28 u163...

  • Page 13: Electric Unit

    KDC-225/225MR/2025 ∗ 3 7 63 1515 0 ∗ ELECTRIC UNIT PRE OUT (X25-998x-xx) 3 4 5 TP532 TP529 ∗ W114 R502 R503 180K 180K TP531 TP528 R355 R356 ∗ W113 Q351 Q352 SELECTOR IC10 ∗ W111 8.1V YCOM TP530 TP527 4.0V XCOM 4.0V...
  • Page 14 KDC-225/225MR/2025 3 7 63 1515 0 DC IN ∗ LX-BUS SERVO SW14 ∗ C356 ACC DET D301 0.47 1.5K BU DET SERGE LINE MUTE 100K 5.0V 100u25 MUTE DRIVE 2.3V 4.9V R257 MECHA +B Q252 R252 4.3K R254 L 13942296513 12.8V 220u16 R273...
  • Page 15 KDC-225/225MR/2025 3 7 63 1515 0 FUSE FRONT L REAR L WHT/BLK GRN/BLK F1 10A GRY/BLK VIOL/BLK FRONT R REAR R VIOL TP10 TP21 ANT CONT ∗ TP22 BLU/WHT P. CON TEL MUTE PCON 14.1V ∗ DC CORD PANT (E30-6027) : RX-492WMP TP23 14.0V TP24...

  • Page 16: Lcd Driver

    KDC-225/225MR/2025 3 7 63 1515 0 SWITCH UNIT (X16-264x-xx) ∗ TP14 REMOTE CONTROL L 13942296513 ESD-GND PANEL SW TP12 TP13 5.0V SW5V TP11 REMO TP10 L-DATAS L-CLK L-CE 5.0V C3 0.047 L-DATAL VDD1 3.3V C4 0.047 VDD2 1.6V L-RES LCD DRIVER TEST R1 56K RESET...
  • Page 17 KDC-225/225MR/2025 3 7 63 1515 0 2SB1565 LC75883E : B30-1633-05 RS-171 B30-1567-05 D3,4 B30-1564-05 ∗ DTA114EE D7-19,21-19 GND LINE Q2,3 2SC4617 D31-35 UDZS5.6B B LINE DA204U DTA114EE DTC143TUA 2SA1036K TP29 2SA1362 2SA1576A TP30 TP31 2SD1858 TP32 TP33 DOWN TP34 2SC4081 TP35 TP36 TP37...
  • Page 18 KDC-225/225MR/2025 3 7 63 1515 0 CD PLAYER UNIT (X32-5400-0x) RFENV D.GND C34 0.1 4.80V C32 0.1 BU+5V 470P 470P L.P.F. 3.10V 1.25V 2.40V 3.10V 3.10V 1.70V IREF R100 C100 8EJE(SW2) 3.10V 1000P PLLF2 12EJE/SDET(SW3) PLLF 3.84V 4.7K 4.80V 7.80V LOE/LIM(SW4) 0.87pp RFSW...
  • Page 19 KDC-225/225MR/2025 3 7 63 1515 0 CAUTION : For continued safety, replace safety critical components only with manufacturer’s recom- IOP+ IOP- mended parts (refer to parts list). Indicates safety critical compo- R7 3.6K nents. To reduce the risk of elec- tric shock, leakage-current or re- 3.3K sistance measurements shall be...
  • Page 20 KDC-225/225MR/2025 EXPLODED VIEW (CD MECHANISM) 3 7 63 1515 0 DPU1 L 13942296513 DFPC1 (X32) φ : N09-4460-05 M1.7x8.5 : N09-4472-05 M1.7x2.5 : N09-6004-05 u163 M2x2 : N09-6007-05 φ : N09-6051-05 2x6(BLK) : N19-2163-04 1.6 WASHER : N39-2020-46 M2x2 * CD MECHANISM OPERATION DESCRIPTION is not in this sevice manual. φ...

  • Page 21: Exploded View (Unit)

    KDC-225/225MR/2025 EXPLODED VIEW (UNIT) 3 7 63 1515 0 SIZE AA BATTERY DME1 M3x8 : N30-3008-46 φ2x6 : N80-2006-46 φ2x8 (BLK) : N80-2008-45 φ3x5 : N83-3005-46 φ3x10 : N80-3010-46 φ3x20 : N83-3020-46 φ2.6x6 : N86-2606-46 φ1.5 RING : N29-0205-04 L 13942296513 (X25-) (X16-) (X16-)

  • Page 22: Parts List

    KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 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.
  • Page 23 KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-9980-11/12/21) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref.
  • Page 24 KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-9980-11/12/21) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref.
  • Page 25 KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. CD PLAYER UNIT (X32-5400-00) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref.

  • Page 26: Mechanism Assy (X92-4660-00)

    KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. MECHANISM ASSY (X92-4660-00) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref.
  • Page 27 KDC-225/225MR/2025 PARTS LIST 3 7 63 1515 0 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. 5 = Value 101 = 100pF Multiplier...

  • Page 28: Specifications

    KENWOOD ELECTRONICS UK LIMITED P.O. Box 61318, Jebel Ali, Dubai, U.A.E. Kenwood House, Dwight Road, Watford, Herts, WD18 9EB, United Kingdom KENWOOD ELECTRONICS (THAILAND) CO., LTD. KENWOOD ELECTRONICS DEUTSCHLAND GMBH 2019 New Pechburi Road, Bangkapi, Huaykwang, Bangkok, 10320 Thailand Rembrücker-Str.

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Kdc-2025

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