Kenwood DPX-8020MD Service Manual
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Kenwood DPX-8020MD Service Manual

Md/cd mp3/dsp receiver
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MD/CD MP3/DSP RECEIVER
DPX-8020MD
SERVICE MANUAL
S.A
COLOR
ESCUTCHEON ASSY
(B07-3046-04)
SCREW SET
(N99-1701-05)
NAME
CRSC
AUD/X'OVER
DISP
ATT
EQ
PANEL ASSY
(A64-2463-02)
2001-5 PRINTED IN JAPAN
C
B51-7775-00 (4) 510
MD EJECT
CD EJECT
DISC
COMPACT
DIGITAL AUDIO
TEXT
TUNE
SEEK
MDLP
ENTER
FUNCTION
DSP
FNC
REMOTE CONTROLLER ASSY
(A70-2006-05)
DC CORD
(E30-4975-05)
PWR OFF
KNOB VOL.
(K24-3735-03)
VOL
KNOB SEEK
(K24-3734-03)
ANGLE
CLOSE
FOLDER SEL
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Summary of Contents for Kenwood DPX-8020MD

  • Page 1 MD/CD MP3/DSP RECEIVER DPX-8020MD SERVICE MANUAL 2001-5 PRINTED IN JAPAN B51-7775-00 (4) 510 MD EJECT CD EJECT DISC PWR OFF COMPACT DIGITAL AUDIO TEXT KNOB VOL. (K24-3735-03) TUNE SEEK KNOB SEEK (K24-3734-03) MDLP ANGLE CLOSE ENTER FOLDER SEL FUNCTION NAME...
  • Page 2 DPX-8020MD MICROCOMPUTER'S TERMINAL DESCRIPTION (X14-) IC1 : System µ-com PIN No. Pin Name Description Processing Operation DSP DATAOUT DSP data output DSP CLK DSP clock output DSP SEL DSP selector DSP RST DSP reset L: Reset DATAH External CH data output...
  • Page 3 DPX-8020MD MICROCOMPUTER'S TERMINAL DESCRIPTION PIN No. Pin Name Description Processing Operation PM VR Panel mechanism control H: 5.1V L: 7.5V PMDET Panel mechanism detection L: ON H: OFF OPEN SW Panel open detection L: OPEN PON2 PON5 (2) CD MSTOP...
  • Page 4 DPX-8020MD MICROCOMPUTER'S TERMINAL DESCRIPTION (X25-) IC1 : Panel µ-com PIN No. Pin Name Description Processing Operation LCD2 DO External LCD driver data output LCD2 CL External LCD driver clock output Not used L: Fixed REMO Remote signal input Not used...
  • Page 5 DPX-8020MD MICROCOMPUTER'S TERMINAL DESCRIPTION PIN No. Pin Name Description Processing Operation Key return signal input 2 Key return signal input 3 Key return signal input 4 Not used L: Fixed Key scan output 0 Key scan output 1 Key scan output 2...
  • Page 6 DPX-8020MD MICROCOMPUTER'S TERMINAL DESCRIPTION PIN No. Pin Name Description Processing Operation  HLDA   For multiplex bus  For multiplex bus  M24B chip select L: SELECT  47-50 SCLT RF 1x/2x speed switch over L: 2x H: 1x ...

  • Page 7: Panel Mechanism Description

    DPX-8020MD PANEL MECHANISM DESCRIPTION A. Panel Opening B. Closing Behavior 1. When Open button (switch) is pressed, the motor (605) 1. The motor rotates in reverse direction. rotates. 2. The arm assembly (604) goes up. When the lever (A) goes 2.
  • Page 8 DPX-8020MD PANEL MECHANISM DESCRIPTION D. Assembly (Close Position) 1. Align the arm assembly with the pin of the planetary gear (603). 2. Assembly these to the sub-chassis (606) along with the rail (612). 3. Align lever (614) hole and the hold of the chassis (601).
  • Page 9 PC BOARD (Component side view) PC BOARD (Foil side view) SYNTHESIZER UNIT (X14-6700-21) SYNTHESIZER UNIT (X14-6700-21) X14-6700-21 A/2 (J74-1209-02) X14-6700-21 A/2 (J741209-12) C328 C228 C326 C226 R328 R228 R325 R225 R327 R227 R324 R224 C702 NF/R NF/L C802 R201 R801 MAIN R302 C701...
  • Page 10 PC BOARD (Component side view) PC BOARD (Foil side view) SWITCH UNIT (X25-8960-00) SWITCH UNIT (X25-8960-00) X25-8960-00 A/2 (J74-1212-12) X25-8960-00 (J74-1212-12) (X25-8960-00) Ref. No. Address X25 B/2 X25 B/2 (X25-8960-00) Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors. Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 11 PC BOARD (Component side view) PC BOARD (Foil side view) CD UNIT (X32-5320-00) CD UNIT (X32-5320-00) X32-5320-00 (J74-1276-02) X32-5320-00 (J741276-02) R105 C101 R200 R107 R108 R109 R110 C100 R102 3,3V SGND R100 S7.5V MOTOR AGND CP10 R101 R13 SPL- SLED+ MSTOP MRST LOAD...
  • Page 12 PC BOARD PC BOARD SUB-CIRCUIT UNIT (X16-1240-00) MD UNIT (X33-3130-01) (Component side view) X33-3130-01 (J74-1203-02) (Component side view) (Foil side view) (X33-3130-01) Ref. No. Address X16-1240-00 (J74-1213-02) X16-1240-00 (J74-1213-02) CP10 LOS-SW LIM-SW DET-SW SIDE A X33-3130-01 (J74-1203-02) (Foil side view) (X33-3130-01) TRK- Ref.
  • Page 13 DETECT 2.2K R715 R717 8.0V 1 16 BATT TUN8V Q702 R713 C704 DC CORD 0.022 PGND (E30-4975-05) 14.4V DPX-8020MD Q705 Q706,707 R719 REAR Lch P-ANT SW D712 14.4V Q701 P CON +14V SERGE BU5V SGND DETECT SW +14V REAR Rch...
  • Page 14 D403 Q604 L508 +3.3V +3.3V +3.3V PON2 R652 100K LOGIC IC R514 Q720 R651 470 C619 0.01 IC16 (BOTTOM VIEW) R650 100K R649 470 C621 0.01 0/5.0V 3.3V 0/5.0V 0/5.0V 3.3V CP72 DBQN0 0/5.0V 0/5.0V 2.2K CP71 3.3V VDD2 2.2K 0/5.0V 5.0V R648 100K...
  • Page 15 Indicates safety critical components. To reduce the risk of electric shock, LED CD leakage-current or resistance measurements shall be carried out (exposed CD DET BU5V BU5V BU5V parts are acceptably insulated from the supply circuit) before the appliance +11V +11V +11V is returned to the customer. DPX-8020MD DPX-8020MD (1/2)
  • Page 16 CP11 EJECT EJECT 0.01 0.01 DPX-8020MD (2/2) CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended •DC voltages are as measured with a high impedance voltmeter. DPX-8020MD parts (refer to parts list). Indicates safety critical components. To reduce the risk of electric shock, leakage-...
  • Page 17 CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended •DC voltages are as measured with a high impedance voltmeter. DPX-8020MD parts (refer to parts list). Indicates safety critical components. To reduce the risk of electric shock, leakage- Values may vary slightly due to variations between individual instruments or/and units.
  • Page 18 R48 18K VIN2 VIN2- MDS-2600 DPX-8020MD CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended •DC voltages are as measured with a high impedance voltmeter. parts (refer to parts list). Indicates safety critical components. To reduce the risk of electric shock, leakage-...
  • Page 19 DPX-8020MD EXPLODED VIEW (UNIT) (X25-) (A/2) (X25-) (B/2) M1.4 : N09-4465-05 M1.4 (BLK) : N09-4466-05 M2x3 : N09-4467-05 φ2x5 : N80-2005-46 φ2x10 : N80-2010-46 Parts with exploded view numbers larger than 700 are not supplied.
  • Page 20 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description tina- Ref.
  • Page 21 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohane Parts No. werden nicht geliefert. (X14-6700-21) Des- Des- Ref. No. Parts No. Description Ref.
  • Page 22 DPX-8020MD PARTS LIST ∗ New Parts ∗ Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X14-6700-21) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No.
  • Page 23 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X14-6700-21) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 24 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X14-6700-21) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 25 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X14-6700-21) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 26 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X25-8960-00) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 27 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X32-5320-00) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 28 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X32-5320-00) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 29 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X33-3130-01) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 30 DPX-8020MD PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X92-4420-00) Teile ohane Parts No. werden nicht geliefert. Des- Des- Ref. No. Parts No. Description Ref.
  • Page 31 DPX-8020MD PARTS LIST CAPACITORS •Capacitor value Color* CC45 010= 1pF 0 =22pF 100= 10pF 1 = Type ...ceramic, electrolytic, etc. 4 = Voltage rating Multiplier 101= 100pF 2 = Shape ...round, square, etc. 5 = Value 2nd number 102= 1000pF=0.001µF 3 = Temp.

  • Page 32: Specifications

    DPX-8020MD SPECIFICATIONS Frequency Range (Frequency Step) ........... 87.5MHz ∼ 108.0MHz (50kHz) Usable Sensitivity S/N: 30dB ................ 9.3dBf (0.8µV/75Ω) Quieting Sensitivity S/N: 50dB ..............15.2dBf (1.6µV/75Ω) Frequency Response (±3.0dB) ................30Hz ∼ 15kHz S/N (dB) ........................70dB (MONO) Selectivity ......................≥80dB (±400kHz) Stereo Separation .....................