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See also:
Instruction Manual
CD RECEIVER
KDC-2023
KDC-2024SA/SG/SYA/SYG
KDC-2094YA/YG
KDC-222/S
KDC-3023
SERVICE MANUAL
CD mechanism operation description is not in this sarvice manual.
Please, refer to sarvice manual X92-4030-0x (B51-7867-00).
Panel assy
(A64-2867-02): KDC-222
(A64-2868-02): KDC-222S
KDC-222
COMPACT
DIGITAL AUDIO
LOUD
SCAN
RDM
OFF
Panel assy
(A64-2878-02): KDC-2024SA/SG/SYA/SYG
KDC-2024S
COMPACT
DIGITAL AUDIO
LOUD
SCAN
RDM
OFF
DC cord
(E30-4784-05)
Lever
(D10-4589-04)x2
Depends on model. Refer to the parts list
Escutcheon
(B07-3060-02): KDC-222
(B07-3022-02): KDC-222S
CRSC
REP
CLK
ADJ
AUTO
AME
AUD
Escutcheon
(B07-3001-02): KDC-2024SA/SG/SYA/SYG
MONO
REP
CLK
ADJ
AUTO
AME
AUD
DC cord(ISO)
(E30-4790-05)
Antenna adaptor
(T90-0523-05)
© 2002-11 PRINTED IN JAPAN
B53-0004-00 ( N ) 3379
CD mechanism extension cord : WO5-0618-00
Panel assy
(A64-2870-02): KDC-2023
(A64-2873-02): KDC-3023
KDC-XXXX
COMPACT
DIGITAL AUDIO
LOUD
SCAN
RDM
OFF
Panel assy
(A64-2884-02): KDC-2094YA/YG
KDC-2094
COMPACT
DIGITAL AUDIO
LOUD
SCAN
RDM
REP
OFF
Mounting hardware assy
(J21-9716-03)
Screw set
(N99-1719-05)
Escutcheon
(B07-3001-02): KDC-2023
(B07-3022-02): KDC-3023
CD MD-Changer Control
CRSC
REP
CLK
ADJ
AUTO
AME
M. RDM
AUD
Escutcheon
(B07-3001-02): KDC-2094YA/YG
WIDE BAND
MONO
CLK
ADJ
AUTO
AME
AUD
Plastic cabinet assy
(A02-1486-13)
Screw set
(N99-1610-15)
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Summary of Contents for Kenwood KDC-2023
- Page 1 CD mechanism operation description is not in this sarvice manual. CD mechanism extension cord : WO5-0618-00 Please, refer to sarvice manual X92-4030-0x (B51-7867-00). Panel assy Escutcheon Panel assy Escutcheon (A64-2870-02): KDC-2023 (B07-3001-02): KDC-2023 (A64-2867-02): KDC-222 (B07-3060-02): KDC-222 (A64-2873-02): KDC-3023 (B07-3022-02): KDC-3023 (A64-2868-02): KDC-222S...
- Page 2 FM(J,K) : 1800mV FM+B FM(E) : 1372mV IC10 Q502 Q223,224 AM(J,K) : 600mV CD : 3600mV AM(E) : 855mV CH : 3600mV FM AGC FM AGC OUT MUTE AM+B Q501 AM AGC POWER IC AM AGC OUT TUNER,MPX & MUTE E-VOL.
-
Page 3: Components Description
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023 COMPONENTS DESCRIPTION SWITCH UNIT (X16-1460-xx/2370-12) Ref.No. Application/Functions Operation/Condition/Compatibility LCD driver & key matrix Remote Sencer Key scan start When Q1 base goes Lo, key scan start. ELECTRIC UNIT (X25-9600-xx/9612-7x) Ref.No. Application/Functions Operation/Condition/Compatibility System control µ-com System µ-com Power amplifire E-Vol output encoder power amplification for speaker. -
Page 4: Microcomputer's Terminal Description
KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023 MICROCOMPUTER'S TERMINAL DESCRIPTION SYSTEM MICROCOMPUTER uPD780058GCxxx (X25 : IC1) Pin No. Name Description Processing Operation TDF DET Panel detection H:Panel detached L:Panel attached H:Eject is completed 8EJE SW Except 8cm CD model:always output L Not used (out put L) - Page 5 KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023 MICROCOMPUTER'S TERMINAL DESCRIPTION Pin No. Name Description Processing Operation B.U-DET Back up detection terminal H:power down L:B.U. on ACC-DET ACC detection terminal H:ACC OFF L:ACC ON Power supply IC SW1 control 0 BA4911 SW1 Power supply IC output...
- Page 6 KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023 MICROCOMPUTER'S TERMINAL DESCRIPTION MECHANISM MICROCOMPUTER MN6627771KP (X32 : IC2) Pin No. Name Description Processing Operation Traverse driver output (PWM output) Spindle motor drive output (PWM output) Spindle motor ON output L:ON H:OFF (default ) multi-purpose PWM output...
- Page 7 KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, 222/S,3023 MICROCOMPUTER'S TERMINAL DESCRIPTION Pin No. Name Description Processing Operation Main clock output terminal DVSS2 Ground lines for digital circuit XSUB1 When external DAC,external clock input terminal XSUB2 TEST1 Test port 1 Normal operation is H fixed...
- Page 8 CD PLAYER UNIT (X32-5380-00) D.GND C34 0.1 4.80V C32 0.1 BU+5V DTC114YUA 4.80V 2.40V DTC143TUA R100 C100 8EJE(SW2) 2200P 2200P 1000P UN5111 12EJE/SDET(SW3) 2SA1036K 4.7K 4.80V LOE/LIM(SW4) 2SA1362 PCK/NTLOCK/FCLK/STLD 2200P 2200P 2SA1576A EFM/NFLOCK/CLDCK/STCK SENSE/RESY/FLAG/STOUT CLVS/VDET/CRC DEMPH/TRCRSO/TEXTCRC 6800P 6800P 4.80V DVDD3 3.0pp CD SIGNAL PROCESS BULT-IN MI-COM...
- Page 9 RFENV IOP+ IOP- R7 3.6K 3.3K C45 0.1 C44 1000P 1.25V 2.40V C43 2200P 1.70V IREF PLLF2 0.047 0.95pp PLLF R39 100K 2.50V 0.91pp 0.87pp RFSW 1000P 4.7K 2.45V DSLF AVSS2 4.80V DVSS1 DVDD1 VDET 0-4.8V 220K 0.015 2.50V B/TE DSLB L PROCESSOR 4.80V...
- Page 10 J4 TOP VIEW ∗ DATA H CHCON D GND REAR REQ C DATA C A GND MUTE REQ H ∗ ∗ (X25-9600-xx/9612-7x) C227 C228 680P 680P D GND R227 R228 Q223 Q224 ∗ MUTE ∗ ∗ MUTE DRIVER D411 ∗ ∗...
- Page 11 E2P-ROM IC12 ∗ 3.3K Q251 5.0V 1/2W SURGE W158 DETECTOR ∗ D252 R258 MUTE 0.01 A. C. C 0.01 DETECTOR ∗ 5.0V B. U. ∗ DETECTOR MUTE LOGIC ∗ 100K 100K POWER AMPLIFIRE W532 L101 4.7uH CF54 ∗ 450kHz C592 0.01 ∗...
- Page 12 C256 C521 C522 C523 C524 NAME DRIVER KDC-222 (K) 5.0V 00-12 1500P 100u50 27P 100P KDC-222S (K) 5.0V KDC-2023 (M) AUDIO+B 00-22 1500P 33u50 27P 100P KDC-3023 (M) M STOP KDC-2024SA (E) R259 22K M RST KDC-2024SG (E) P-MUTE 12-75...
- Page 13 SWITCH UNIT (X16-1460-xx/2370-12) (B38-1080/1081/1126-05) : KDC-4023/202MR/2024SA/2024SG/2024SYA/2024SYG/2094YA/2094YG/2022/2022V/2023/3023/RX-491CD/RY-391CD (B38-107 TP35 REMOTE ESD-GND SENSOR TP34 PANEL- ∗ TP24 KEY DETECT R13 47 SW5V TP9 TP8 TP33 ∗ R12 1K REMO TP27 TP11 R2 470 L-DATAS X14- TP28 R4 470 L-CLK TP29 R3 470 L-CE TP30 R5 1K...
- Page 14 X16-1460-15 B30-1642-05 B30-1633-05 (RED) (BLUE) KDC-2024SA (E) B30-1567-05 B30-1567-05 KDC-2024SYA (E) X16-1460-16 B30-1633-05 (RED) (RED) TP14 KDC-2094YA (E) B30-1533-05 B30-1533-05 KDC-2023 (M) X16-1460-20 B30-1633-05 (GREEN) (GREEN) B30-1567-05 B30-1567-05 KDC-3023 (M) X16-1460-21 B30-1641-05 (RED) (RED) B30-1567-05 B30-1564-05 KDC-2022 (K) X16-2370-10 B30-1633-05...