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Kenwood KMD-44 Service Manual

Md receiver
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MD RECEIVER
KMD-44

SERVICE MANUAL

Front glass
(B10-4030-01)
MDLP
LOUD
Plastic cabinet assy
(A02-1486-13)
Lever
(D10-3031-04)x2
Escutcheon
(B07-2181-02)
MD RECEIVER
CD MD-CHANGER CONTROL
SCAN
ROM
REP
Mounting hardware assy
(J21-9491-13)
Screw set
(N99-1610-15)
© 2001-2 PRINTED IN JAPAN
B51-7737-00 ( N ) 1529
Panel assy
(A64-2261-02)
KMD-44
PWR
OFF
45Wx4
MENU
AUD
D.SCN
M.ROM
AUTO AME CLK
NAME.S
DC cord
(E30-4783-05)
Stay
Screw set
(J54-0606-04)
(N99-1632-05)
SRC
DISC
FM
AM
DISC

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Summary of Contents for Kenwood KMD-44

  • Page 1: Service Manual

    MD RECEIVER KMD-44 SERVICE MANUAL © 2001-2 PRINTED IN JAPAN B51-7737-00 ( N ) 1529 Front glass Escutcheon Panel assy (B10-4030-01) (B07-2181-02) (A64-2261-02) KMD-44 DISC MD RECEIVER CD MD-CHANGER CONTROL 45Wx4 MDLP MENU LOUD SCAN D.SCN M.ROM AUTO AME CLK NAME.S...

  • Page 2: Block Level Diagram

    KMD-44 BLOCK LEVEL DIAGRAM BLOCK DIAGRAM P-ANT BU 14V PRE OUT P-CON SP OUT TEL MUTE BACK UP POWER IC Q1,2 CD/MD CH AUDIO BU 5V Q17,18 PRE OUT REAR TEL MUTE Q25-28 ACC DET. P-ANT BU DET. FM +B...
  • Page 3 KMD-44 KMD-44 BLOCK DIAGRAM (MD) OPTICAL PICKUP BLOCK X33 UNIT KMS-242B CDX2667R DYNAMIC RAM LP2982-3.3 A3.3V DAVDD REG. ATRAC/ DIGITAL SHOCK ATRAC3 AUDIO RESISTANT MORF AUDIO +B SW+8V DECODER MEMORY RF AMP ACIRC NJM4565MD CONTROLLER CXA2523AR DECODER SW+5V RF AGC & EQ...

  • Page 4: Components Description

    KMD-44 COMPONENTS DESCRIPTION SWITCH UNIT (X13-9700-11) Ref. No. Component name Application/Function Operation/Condition/Compatibility LC75808W LCD driver with key-matrix RS-171 Remote control light sensor DTA114EK or UN2111 Key-matrix permission SW Ready on key-matrix, ON when the base goes "Lo". 2SD2114K Illumination SW(Red) ON when the base goes "Hi".
  • Page 5 KMD-44 COMPONENTS DESCRIPTION MD Unit (X33-3120-00) Ref. No. Application/Function Operation/Condition/Compatibility RF amplifier (Pit-groove switching, AGC, EQ Gain switching, I-V Amp, RF Matrix Amplifier for MD light amount signal output, Peak-hold output, Bottom-hold output, FE output, TE output, SE output, ADIP dual-value output, Vref output, APC PD amplifier,...

  • Page 6: Microcomputer's Terminal Description

    KMD-44 MICROCOMPUTER'S TERMINAL DESCRIPTION System µ-com: (X25 : IC1) Terminal Description Name Function Description of Processing TYPE 0 Destination type input terminal 0 Pull down to GND TYPE 1 Destination type input terminal 1 Pull down to GND N.C. Not used...
  • Page 7 KMD-44 MICROCOMPUTER'S TERMINAL DESCRIPTION Name Function Description of Processing N.C. Not used AVDD VDD connection terminal Connected to BU 5V lines VDD connection terminal AVREF 0 Connected to BU 5V lines (A/D converter reference voltage input) PHONE PHONE detection input Not used N.C.

  • Page 8: Test Mode

    KMD-44 ADJUSTMENT TEST MODE G Adjustment Procedure 1. To enter test mode (Note: During the adjustment procedure, be While holding the "FM" key and preset "6" key, sure to turn off the power supply to the set.) reset the unit. All indication segments are ON at 1.
  • Page 9 KMD-44 ADJUSTMENT G For Pre-Mastered Disk 13. The set will enter high-reflection pit beta Notes play mode and adjustments in items 1. After adjusting for a media, it must be 5,6,7, and 8 should be conducted. always confirmed. When another media is 14.
  • Page 10 PC BOARD (COMPONENT SIDE VIEW) X13-9700-11 (J74-0981-12) X25-8840-11 (J74-1155-12) X25-8840-11 4.332MHz R172 IC10 R175 R174 R170 R173 S-METER R150 R138 R139 R202 R145 IC2SCK IC2SDA TEST FL RL FR RR R190 R133 R134 R137 6 10 7 11 13 R135 R131 R128 X13-9700-11...
  • Page 11 PC BOARD (FOIL SIDE VIEW) X13-9700-11 (J74-0981-12) X25-8840-11 (J74-1155-12) X25-8840-11 4.332MHz R172 IC10 R175 Q7 Q8 R174 R170 R173 S-METER R138 R150 31 30 R139 R202 R145 IC2SCK IC2SDA TEST RR FR R190 R133 R134 R137 R135 R131 R128 X13-9700-11 Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 12 PC BOARD (COMPONENT SIDE VIEW) (FOIL SIDE VIEW) X33-3120-00 (J74-1202-02) X33-3120-00 (J74-1202-02) DET-SW LOE-SW CP10 LOS-SW LIM-SW LIM-SW LOS-SW CP10 LOE-SW DET-SW X33-3120-00 X33-3120-00 addres addres Refer to the schematic diagram for the values of resistors and capacitors.
  • Page 13 FRONT R VIOL VIOL BLV/WHT BLV/WHT P. CON/ANT. CON TEL MUTE P. CON/ANT. CON FUSE DC CORD DC CORD P-CON (E30-4783-05) (E30-4785-05) KMD-44 KMD-673R(M) (X25-8840-11) ACC DETECTION DETECTION 5.0V 5.0V L1 4.7uH 5.0V P-CON SW ∗ ∗ MUTE 5.0V DRIVER Q14,15 5.0V...
  • Page 14 (E63-0852-05) PRE OUT REAR MUTE REQ C DTA114EK 2SA1576A 2SD1760 2SB1548 2SB1277 REQ H DATA C AGND DTA124EK 2SB1295 DTC114YK 2SC2412K 7.4V 4.5V 7.3V 14.4V 7.3V 7.4V B.U. DATA H 7.3V 14.4V 7.3V DTC124EK 2SC4116 7.2V 7.3V DTC143TK 2SD1819A CH-CON DTC144EK 2SD2114K KRC103S...
  • Page 15 VLCD3 (X13-970X-XX) C3 0.22 VLCD2 R12, 3.6V MOEDL NAME UNIT No. 4.7K C4 0.22 VLCD1 5.4V 4.7K C5 0.22 LCD DRIVER KMD-44(K) 0-11 ∗ 7.3V VLCD0 ILL-GND WITH KEY-MATRIX 4.7K KMD-673R(M) 2-71 10.2V KMD-673R(E) VLCD LED +B 9.2V : LC75808W 4.9V...
  • Page 16 (X33-3120-00) MODEL NAME DESTINATION MODEL No. SIGNAL LINE DET-SW B LINE MDS-2500 X92-4250-00 0-00 +3.3V MDS-2501 X92-4250-01 3.3V 2.5V 2.5V MDS-2510 X92-4260-00 DET-SW 0-01 MDS-2511 X92-4260-01 LOS-SW 0.01 DO/FOK DAVSSR 1.3V 1.58V VREFR LOS-SW IC1 : CXA2523AR : 2SB1295 or 2SA1362(Y) 1.65V 3.3V AOUTR...
  • Page 17 KMD-44 EXPLODED VIEW (MECHANISM) φ 2x3.5 : N09-4349-05 M2x2(BLK) : N09-4236-05 M2x4 : N09-4319-05 M1.7x2.5 : N09-4269-05 M1.4x2 : N09-4233-05 WASHER φ 4 : N19-2021-04 WASHER φ 4 : N19-2127-14 M2x3.5 : N09-4126-05 X33-3120-00 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 18: Exploded View (Unit)

    KMD-44 EXPLODED VIEW (UNIT) ( X25) φ 3x5 N83-3005-46 φ 3x8 N80-3008-46 φ 2.6x6 N86-2606-46 (X25) φ 3x20 N89-3020-46 φ 2x6 N80-2006-46 φ 2x8 (BLK) N80-2008-45 M2.6x8 (BLK) N30-2608-45 M3x10 N35-3010-46 φ 3x6 N83-3006-46 M2x2 N38-2020-46 (X13) (X13) (X13-9700-11) (X13)

  • Page 19: Parts List

    KMD-44 PARTS LIST ∗ 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. Ref. No. Parts No. Description Ref. No. Parts No.
  • Page 20 KMD-44 PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-8840-11) Teile ohne Parts No. werden nicht geliefert. Ref. No. Parts No. Description Ref.
  • Page 21 KMD-44 PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-8840-11) Teile ohne Parts No. werden nicht geliefert. Ref. No. Parts No. Description Ref.
  • Page 22 KMD-44 PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. ELECTRIC UNIT (X25-8840-11) Teile ohne Parts No. werden nicht geliefert. Ref. No. Parts No. Description Ref.
  • Page 23 KMD-44 PARTS LIST ∗ New Parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. MD UNIT (X33-3120-00) Teile ohne Parts No. werden nicht geliefert. Dest Dest Ref. No. Parts No.

  • Page 24: Specifications

    Current Consumption......................10A Installtion Size (W)x(H)x(D) ........182x53x160 (mm) / 7-3/16x2-1/16x6-3/8 (in) Weight ........................1300g (2.9lbs) KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. US and foreign patents licensed from Dolby Laboratoris.

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Kmd-673r

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