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Kenwood KDC-8026 Service Manual

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CD RECEIVER
KDC-8026
KDC-MP825
KDC-MPV8025
KDC-W7027
SERVICE MANUAL
Panel assy
KDC-8026 (A64-3231-01)
Panel assy
KDC-MPV8025 (A64-3228-01)
* DC cord
(E30-6294-05)
(E30-6295-05)
*Remote controller assy
(A70-2040-05) : RC-505
* Depends on model. Refer to the parts list.
Escutcheon
* DC cord
(B07-3078-01)
(E30-4942-05)
*Size AA Battery
Lever
(Not Supplied)
(D10-4674-04) x 2
© 2004-02 PRINTED IN JAPAN
B53-0130-00 ( N ) 2704
CD mechanism extension cord (24PIN) : W05-0935-00
Panel assy
KDC-MP825 (A64-3229-01)
Panel assy
KDC-W7027 (A64-3223-01)
Mounting hardware assy
(J21-9823-03)
*Screw set
Screw
(N99-1723-05)
(N99-1734-05)
TDF PANEL INFORMATION
MODEL
PARTS NO.
KDC-8026
KDC-MP825
Y33-1790-61
KDC-MPV8025
KDC-W7027
* Antenna adaptor
(T90-0552-05)
Plastic cabinet assy
(A02-2731-13)
PANEL NAME
TDF-M7000

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Summary of Contents for Kenwood KDC-8026

  • Page 1 SERVICE MANUAL © 2004-02 PRINTED IN JAPAN B53-0130-00 ( N ) 2704 CD mechanism extension cord (24PIN) : W05-0935-00 Panel assy Panel assy KDC-MP825 (A64-3229-01) KDC-8026 (A64-3231-01) Panel assy Panel assy KDC-MPV8025 (A64-3228-01) KDC-W7027 (A64-3223-01) Mounting hardware assy Escutcheon * DC cord...

  • Page 2: Block Diagram

    KDC-8026/MP825 KDC-MPV8025/W7027 BLOCK DIAGRAM AUX IN (X34- ) Q207,208 IC13 PRE OUT TUNER PRE MUTE OP AMP (SUB WOOFER) AUDIO OUT Q203,204 Q303,304 IC12 E-VOL SYSTEM PRE OUT & AM+B PRE MUTE OP AMP E'S+ (REAR) Q205,206 IC11 PRE OUT...

  • Page 3: Components Description

    KDC-8026/MP825 KDC-MPV8025/W7027 COMPONENTS DESCRIPTION SUB CIRCUIT UNIT (X16-2080-10) Ref No. Application / Functions Operation / Condition / Compatibility E2PROM E2PROM for security DISPLAY UNIT (X16-2540-10) Ref No. Application / Functions Operation / Condition / Compatibility Driver LCD driver (Include KEY input function)
  • Page 4 KDC-8026/MP825 KDC-MPV8025/W7027 COMPONENTS DESCRIPTION Ref No. Application / Functions Operation / Condition / Compatibility BU2.5V AVR Selector IC Serial audio data selector 3.3V AVR (IC2 DAC part) Q1,4 Level shift FET Level shift (3.3V - 5.0V) Q3,5 Level shift TR Level shift (3.3V - 5.0V)
  • Page 5 KDC-8026/MP825 KDC-MPV8025/W7027 MICROCOMPUTER’S TERMINAL DESCRIPTION SYSTEM MICROPROCESSOR : UPD703030GC042 (X34-304 : IC1) Pin No. Pin Name Description / Processing Operation Fig. PLL DATA Data input/output terminal for Tuner front-end AM+B AM+B (AM operation : H) (FM+B) FM+B (FM operation : H, Last FM : H with RDS,RBDS model)

  • Page 6: Microcomputer's Terminal Description

    KDC-8026/MP825 KDC-MPV8025/W7027 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Description / Processing Operation LX CON External slave unit (ON : H, OFF : L) LX RST Reset output to external slave unit (Normal : L, After system reset : H 400ms or more and then L) CD MECHA+B CD4.7V output terminal (CD : H, Except CD source : L)
  • Page 7 KDC-8026/MP825 KDC-MPV8025/W7027 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Description / Processing Operation NOISE FM noise detection terminal IFC OUT Front end IFC OUT input terminal (Receiving station : 2.5V or more) POWER DET Audio power IC DC offset detection...
  • Page 8 KDC-8026/MP825 KDC-MPV8025/W7027 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Description / Processing Operation 0bit muting detect (Lch) L : MUTE OFF, H : MUTE ON 0bit muting detect (Rch) L : MUTE OFF, H : MUTE ON 14,15 20CS Chip select signal output terminal (for decoder)
  • Page 9 KDC-8026/MP825 KDC-MPV8025/W7027 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Description / Processing Operation ESRST Reset signal output terminal (for ES3890) L : RESET, H : NORMAL VMUTE Video mute control terminal H : MUTE ON, L : MUTE OFF NC (OPEN)

  • Page 10: Test Mode

    KDC-8026/MP825 KDC-MPV8025/W7027 TEST MODE How to enter the test mode Test mode specifications of the CD receiver While pressing and holding the Preset 1 and Preset 3 keys, • Forced ejection is inhibited in the reset start operation. When reset the unit.
  • Page 11 KDC-8026/MP825 KDC-MPV8025/W7027 TEST MODE Menu-related specifications AM key Display panel E2PROM condition. • A short press of the Q key initiates the menu mode. (Display) P–ROM OK (Registered code) • Pressing the DNPP key on the remote initiates the Menu P–ROM NG (Code is write in error)
  • Page 12 KDC-8026/MP825 KDC-MPV8025/W7027 TEST MODE Security information 3. How to inscription the panel security code 1. Forced Power ON mode (All models) 1. Enter the test mode. 2. Pressing the AM key on all lighting, check the “P-ROM WAIT” Even when the security (Cord) is approved, resetting the display.
  • Page 13 KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) DISPLAY UNIT DISPLAY UNIT X16-2540-10 (J74-1588-02) X16-2540-10 (J74-1588-02) ILLGND R51 R52 E2PCLK E2PDATA PANDET DATAS DATAL DGND REMO X16-2540-10 Ref. No. Address X16-2540-10 Ref. No. Address C13 C29 Refer to the schematic diagram for the values of resistors and capacitors.

  • Page 14: Pc Board (Component Side View)

    KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (COMPONENT SIDE VIEW) ELECTRIC UNIT X34-304x-xx (J74-1474-22) C100 C256 R127 C128 C126 R105 C250 R300 C109 C132 R140 TEST R268 R141 R202 R102 R103 C200 R234 R235 R236 R262 R237 R217 R216 C110 IC15 DATA C112...
  • Page 15 KDC-8026/MP825 KDC-MPV8025/W7027 SWITCH UNIT X16-2560-11 (J74-1590-02) C258 C257 R307 R303 R302 C255 R403 Q102 C410 Q104 R407 R406 C411 R405 R404 X34-304x-xx Ref. No. Address Ref. No. Address Q102 Q104 X16-2560-11 Ref. No. Address Refer to the schematic diagram for the...
  • Page 16 KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (FOIL SIDE VIEW) ELECTRIC UNIT X34-304x-xx (J74-1474-22) C101 C251 R317 Q103 R316 R314 R313 R315 C408 R301 AGND IC12 R267 R278 R274 R277 IF+B C204 R247 R232 R233 R227 R226 R225 C259 C260 R222 DATA R221...
  • Page 17 KDC-8026/MP825 KDC-MPV8025/W7027 SWITCH UNIT X16-2560-11 (J74-1590-02) R146 SW14V R144 C103 R100 R101 C106 R108 R133 C130 R142 C135 ILL-GND ILL+B X34-304x-xx Ref. No. Address Ref. No. Address R111 C114 SW5V IC12 R109 R110 IC13 D-GND IC14 PAN5V -GND Q103...
  • Page 18 KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (COMPONENT SIDE VIEW) CD PLAYER UNIT X32-5540-00 (J74-1552-12) RFOK CP12 CP13 CP15 MIACK X32-5540-00 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 19 KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (FOIL SIDE VIEW) CD PLAYER UNIT X32-5540-00 (J74-1552-12) Vref FLAG HOLD MIRR LOCK TRK IN TRK OUT FCS DOWN FCS UP C22 C23 D3.3V DAVdd3.3V SDIO BCKIA 12EJE A.+8V LRCKIA /EJECT SLED IN SLED OUT A.GND...
  • Page 20 KDC-8026/MP825 KDC-MPV8025/W7027 PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) DISPLAY UNIT DISPLAY UNIT X16-2550-10 A/3 (J74-1589-02) X16-2550-10 A/3 (J74-1589-02) X16 C/3 X16 C/3 CP53 ILL-GND X16 B/3 X16 B/3 VLCD1 D-GND CP55 CP56 L-CE L-DATAS VOL-B VOL-A X16-2550-10 Ref. No.
  • Page 21 KDC-8026/MP825 KDC-MPV8025/W7027 to CD MECHANISM ELECTRIC UNIT (X34-304x-xx) EXTERNAL DISPLAY & ∗ ∗ STEERING REMOTE CORD R323 ∗ 2.2K TP15 R310 470 R321 R322 ∗ TP16 2.2K 2.2K R309 470 O-CLK O-DATA ∗ TP17 R311 470 ∗ TP18 R308 1K...
  • Page 22 KDC-8026/MP825 KDC-MPV8025/W7027 (X34-304x-xx) C23, D54, R225-227, R252, MODEL UNIT C100 C252 R146 R203 R204 R205 R206 R281 NAME 308-311 253,257 KDC-MPV8025 0-10 X86-3730-11 2200u50 C94-0052-05 KDC-W7027 2-71 YES X86-3732-70 3900u50 C94-5540-05 KDC-MP825 0-11 X86-3730-11 2200u50 C94-0052-05 KDC-7027/Y 2-72 YES YES...
  • Page 23 KDC-8026/MP825 KDC-MPV8025/W7027 : UPD703030GC042 Q1,8,9,13 : 2SA2057 Q23,26 : DTC114YUA or : 1N5393G-M5 : MA4056-M D63-65 : DA204U : TDA7411 Q2,10,14,32-34 : 2SC4081 UN5214 : RB160L-40 : MA4047-M : IMSA-68 : M5237ML Q3,27 : 2SA1576A Q24,25 : 2SB1240 : MA4056(N)-M...
  • Page 24 ∗ TP102 R146 1K EXT CONT TP103 P-CON TP104 R147 10K PHONE TP105 TP106 DC CORD DC CORD R148 10K ILLUM (E30-6294-05) : KDC-8026 (E30-6295-05) : KDC-MPV8025 6.8V TP107 KDC-MP825 6.8V 6.8V 6.8V 0.22u50 B.U. 6.8V TP115 0.22u50 WHT/BLK GRN/BLK 6.8V...
  • Page 25 KDC-8026/MP825 KDC-MPV8025/W7027 DISPLAY UNIT (X16-2540-10) N.C. REMO R67 2.7K R68 2.7K GREEN 5.0V VLCD 8.5V VLCD TP41 2.2K VLCD0 6.7V C4 0.1 VLCD1 5.0V VLCD2 3.3V REMOTE VLCD3 1.7V CONTROL VLCD4 SENSOR TEST R24 47K 3.9K 100K TP20 5.0V PAN-5V N.C.
  • Page 26 KDC-8026/MP825 KDC-MPV8025/W7027 LCD DRIVER & KEY INPUT LCD DRIVER SWITCH UNIT (X16-2080-10) GND LINE MODEL NAME UNIT No. B LINE KDC-7027/Y PAN-DET KDC-8026 X16-2540-10 KDW-MP825 LC75808W KDC-W7027 LC75878W PNA4S22M Q1,6 DTA114EE : UMX2N Q5,11 2SC4617 MA3062-M 5.0V D2-5 DA204U B30-2233-05...
  • Page 27 2SC4617 2SD2114K 2SB1188 2SC4081 UMX2N DTA114EUA DTA124EUA DTC124EUA DTC144EUA KDC-8026/MP825/W7027 (2/3) DAN202U CAUTION : For continued safety, replace safety critical components only with manufacturer’s recommended parts (refer to parts list). 40-10 DAP202U Indicates safety critical components. To reduce the DA204U...
  • Page 28 KDC-8026/MP825 KDC-MPV8025/W7027 (X16- ) (B/3) DISPLAY UNIT (X16-2550-10) (A/3) TP43 CP50 470 0.01 TP44 0.01 TP45 TP46 0.01 N.C. CP51 TP47 R63 270 REMO R67 2.7K (X16- ) (C/3) R68 2.7K GREEN TP49 CP52 470 0.01 5.0V VLCD 7.4V TP50 TP41 2.2K...
  • Page 29 KDC-8026/MP825 KDC-MPV8025/W7027 LCD DRIVER & KEY INPUT LCD DRIVER SWITCH UNIT (X16-2080-10) PAN-DET GND LINE B LINE LC75808W Q1,6 DTA114EUA or LC75878W UN5111 PNA4S22M Q2,11-16 : UMX2N M62333FP Q5,62-64 2SC4617 5.0V MA3062-M D2-5 DA204U EEP ROM B30-2233-05 MA3091-M D50-53 B30-1599-05...
  • Page 30 KDC-8026/MP825 KDC-MPV8025/W7027 MA142WA UN5212 RD6.8M TC74HC02AF TC7SH08FU M5237ML LB1930M TDA7479D KDC-MPV8025 (2/3) CAUTION : For continued safety, replace safety critical components only with manufacturer’s recommended parts (refer to parts list). Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance mea-...
  • Page 31 KI4 7 NC 11 X16-254- X16-255- VOL-B VOL-A D GND PAN-5V ILL +B ILL +B ILL-GND ESD GND OPEN VOLUME KDC-8026/MP825/MPV8025/W7027 (3/3) (X16-256x-xx) UNIT C1-5, D11-15, : DTA114YUA R1,2 R3,4 MODEL NAME D1-10 R6-10 7-12 17-22 Q2-4 : 2SD2114K KDC-X979/X879...
  • Page 32 KDC-8026/MP825 KDC-MPV8025/W7027 CD PLAYER UNIT (X32-5500-00/01,5540-00/01) LEVEL SHIFT (DA) 0V (3.3V 5.0V) IOP1 IOP2 R34 4.7K (MP3) 0/3.3V C28 10 LEVEL SHIFT (3.3V 5.0V) 16.000MHz R35 100K 3.3V 0.2V 100K RESET 3.3V 3.8/0V 3.3V AVDD1 DGND1 2.4/0V 1000P 3.3V RFOK RFOK 3.3V...
  • Page 33 KDC-8026/MP825 KDC-MPV8025/W7027 Q9,10 Vref DPU1(X92- ) 1.7Vp-p 270K OPTICAL 6800P PICKUP 0.3Vp-p 1.65V 1.65V RF2- 1.65V 1.0Vp-p FCS+ 1.0Vp-p TRK+ 3.9K TRK- 1.7Vp-p FCS- 3300P ADVDD 3.3V 1.65V 0.01 3.0/0.3V 0.01 ADGND 91CW12AFG-4VF6 3.3/0V UPD63712GC TEST0 RF AMP/SERVO TC94A20F-010 TEST1...

  • Page 34: Exploded View (Mechanism)

    KDC-8026/MP825 KDC-MPV8025/W7027 EXPLODED VIEW (MECHANISM) DPU1 DFPC1 (X32) φ : N09-6192-05 M1.7x8.5 : N09-6191-05 M1.7x2.5 : N09-6004-05 M2x2 : N09-6193-05 φ : N09-6194-05 2x6(BLK) : N19-2163-04 1.6 WASHER : N39-2020-46 M2x2 * CD MECHANISM OPERATION DESCRIPTION is not in this sevice manual.

  • Page 35: Exploded View (Unit)

    KDC-8026/MP825 KDC-MPV8025/W7027 EXPLODED VIEW (UNIT) M2x1.9 N09-4448-05 FLAT WASHER N19-2176-04 N09-6073-05 RETAINIING RING N24-3015-60 M2x2 N09-6087-15 M2x2.5 N38-2025-46 M2.6x5(BLK) N38-2650-45 N09-6088-05 M2x3(BLK) N09-6089-15 M3x5 N67-3005-46 φ2x5 φ3x5 N09-6093-05 N83-3005-46 φ2x5(BLK) φ3x8 N09-6094-05 N83-3008-46 φ2x4(BLK) M2x3(BLK) N09-6096-05 N86-2004-45 φ3x8 M2x2 N09-6097-05 N80-3008-46 φ2x5(BLK)

  • Page 36: Parts List

    E30-6312-05 CORD WITH PINPLUG (2PRE+1AUX) K3M1E2 E30-6314-05 CORD WITH PINPLUG (2PRE) N99-1723-05 SCREW SET K3K4M1 E30-6216-05 CORD WITH DIN CONNECTOR K3K4M1 N99-1734-05 SCREW SET K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 37 K4M1E2 B11-1405-04 REFLECTION SHEET CK73FB1A225K CHIP C 2.2UF K4M1E2 B11-1408-04 OPTICAL DIFFUSER B19-2204-02 LIGHTING BOARD CC73GCH1H681J CHIP C 680PF K4M1E2 B30-2233-05 LED (HR 1608) K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 38 J 1/10W K3 CK73GB1H103K CHIP C 0.010UF K R56,57 RK73GB2A151J CHIP R J 1/10W K3 C7-9 CK73GB0J105K CHIP C 1.0UF RK73GB2A221J CHIP R J 1/10W K3 K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 39 CHIP-COM 100K J 1/16W RK73GB2A133J CHIP R J 1/10W RK73GB2A241J CHIP R J 1/10W RK74GB1J102J CHIP-COM 1.0K J 1/16W RK73GB2A104J CHIP R 100K J 1/10W K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 40 CHIP C 0.010UF K C102 C90-5619-05 ELECTRO 220UF 16WV E40-9368-05 FLAT CABLE CONNECTOR (28PIN) C103 CK73GB1H103K CHIP C 0.010UF K E41-0399-05 FLAT CABLE CONNECTOR (15PIN) K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 41 CHIP R 4.7K J 1/8W R268 RK73GB2A333J CHIP R J 1/10W R132 RK73FB2B561J CHIP R J 1/8W M1E2 R269 RK73GB2A472J CHIP R 4.7K J 1/10W K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 42 TRANSISTOR RD6.8MW ZENER DIODE K3M1E2 Q51,52 DTA124EUA DIGITAL TRANSISTOR Q51,52 UN5112 DIGITAL TRANSISTOR D29-31 1SS133 DIODE DTC143TUA DIGITAL TRANSISTOR D33-40 DIODE UN5216 DIGITAL TRANSISTOR K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.
  • Page 43 EXTENSION SPRING G01-3093-04 TORSION COIL SPRING G01-3094-04 EXTENSION SPRING G01-3091-04 EXTENSION SPRING G01-3092-04 EXTENSION SPRING G01-3090-04 EXTENSION SPRING G02-1413-04 FLAT SPRING G02-1414-04 FLAT SPRING K3 : KDC-MPV8025 K4 : KDC-MP825 E2 : KDC-W7027 M1 : KDC-8026 Indicates safety critical components.

  • Page 44: Specifications

    KENWOOD ELECTRONICS GULF FZE 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 956 Udom Vidhya Building (Olympia) Rama IV Road, Silom, Bangrak, Bangkok 10500 Thailand Rembrücker-Str.

This manual is also suitable for:

Kdc-mpv8025Kdc-mp825Kdc-w7027

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