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Kenwood RXD-M31 Service Manual

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MICRO HiFi COMPONENT SYSTEM
RXD-M31/LS-M31(S)
SERVICE MANUAL
(HM-331)**
**Refer to page 2 if you wnat to know system configuration.
Knob (SET/DEMO)
(K29-7630-08)
Knob (TAPE REC)
(K29-7627-08)
Knob (MENU)
(K29-7628-08)
Knob
(PANEL OPEN/CLOSE)
(K29-7637-08)
Knob
(TAPE/EQ/CD)
(K29-7634-08)
Knob
(TAPE/STOP)
(K29-7635-08)
Control panel *
(A21-)
Knob
(ON/STANDBY)
(K29-7636-08)
Head phone jack
(E11-0398-08)
086-5306051
4
TAPE rec
1
TAPE / preset
TUNER / band
menu
set / demo
open / close
panel
tape
CD
6
EQ.
2
2
direction
on/standby
STOP
TAPE
7
Auto Reverse
phones
© 1999-4/B51-5521-00 (K/K) 3590
CD
TAPE
4
O.T.E.
1
AUX
repeat
sound
VOLUME / multi control
0
push open
Top panel
(A21-3780-08)
Display lens *
(B12-)
Knob
(FF/TUNER/AUX)
(K29-7631-08)
Knob (O.T.E)
(K29-7632-08)
Knob (SOUND)
(K29-7633-08)
Knob (REPEAT)
(K29-7629-08)
LED lens (MIDDLE)
(B12-0376-08)
Knob (VOLUME)
(K29-7626-08)
Sensor lens
(B12-0375-08)
Cassette door cover
(SILVER)
(A02-2922-08)
Cassette door lens
(B10-3524-08)
Panel cover
(A21-3778-08)
Rubber foot
(J02-1456-08)

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  Summary of Contents for Kenwood RXD-M31

  • Page 1 MICRO HiFi COMPONENT SYSTEM RXD-M31/LS-M31(S) SERVICE MANUAL (HM-331)** © 1999-4/B51-5521-00 (K/K) 3590 **Refer to page 2 if you wnat to know system configuration. Top panel (A21-3780-08) Display lens * (B12-) Knob (FF/TUNER/AUX) (K29-7631-08) Knob (SET/DEMO) (K29-7630-08) TAPE Knob (O.T.E) Knob (TAPE REC) O.T.E.
  • Page 2: Table Of Contents

    RXD-M31 CONTENTS / ACCESSORIES / CAUTIONS Contents CONTENTS / ACCESSORIES / CAUTIONS....2 PC BOARD ..............9 EXTERNAL VIEW ............3 SCHEMATIC DIAGRAM ..........14 BLOCK DIAGRAM ............4 EXPLODED VIEW .............27 CIRCUIT DESCRIPTION ..........5 PARTS LIST...............29 ADJUSTMENT ............8 SPECIFICATIONS .............37 Accessories Please confirm that the following accessories are present.
  • Page 3: External View

    RXD-M31 EXTERNAL VIEW PVC cover (BLACK) ANTENNA (F07-1685-08) SPEAKERS Metal plate (6–16Ω) (LEFT SIDE) (J21-6762-08) Lock terminal board 300W (E70-0112-08) Speaker terminal – (E70-0113-08) – Phono jack (E63-1092-08) DIGITAL SUPER OPTICAL WOOFER PRE OUT Oscillating module Slide switch (OPTICAL) (S62-0090-08)
  • Page 4 FL FILAMENT FE-BIAS (RF-AMP) MECHA. CXD2587Q (DSP/DAC/CD-TEXT) AC5.6V IC203 FFDR FRDR TFDR BA5979S IC401 (4ch BTL-DRIVER) TRDR SFDR SRDR (MAIN u-COM) JK302 DIGITAL OUT DIGITAL OUT DISPLAY BOARD BOARD DRIVER IC801 Q1001- IC1001 J1001 1007 ROTARY REMOTE (A/D) ENCODER C0NTROL RXD-M31...
  • Page 5: Block Diagram

    1. Initialization 1-4 Mechanism initialization 3. Destination list of TUNER (DSW4=50pin, DSW3=49pin, DSW2=48pin) U-COM Discrimination 1-4-1 CD mechanism Desti- Receiving frequency Channel 1-1 Setting of initial conditions Desti- nation DSW2 Band range space • If a mechanism error occurs, “C” is indicated on the DSW4 DSW3 While pressing the [SET] key, plug the AC power cord...
  • Page 6 H : OPEN L : CLOSE AVSS – 44,45 NO USED PHOTO DECK ROTARY DETECT INPUT MODEL DESTINATION DISTINCTION (MODEL) H : RXD-M31 VREF – 5V REFERENCE VOLTAGE ( NO BACKUP) DOLBY NO USED AVCC – 5V POWER SUPPLY ( BACKUP) 48-50...
  • Page 7 5. Test mode (c) Mechanism half switches indication The mechanism half switches status are indicated "/ " or "TAPE" on the display as shown below. 5-1 Test mode of the receiver (1) Setting of the test mode. DOT (DISPLAY) 1st figure 2nd figure 3rd figure 4th figure...
  • Page 8: Adjustment

    Adjustment of cassette deck Adjustment of tuner INPUT OUTPUT CASSETTE TAPE ALIGNMENT ITEM ALIGN FOR FIG. SETTING SETTING DECK SETTING POINTS INPUT OUTPUT TUNER ALIGNMENT ITEM ALIGN FOR FIG. SETTING SETTING SETTING POINT Unless otherwise specified, set the respective switches as follows: 0dBs = 0.775V Adjust VR1 and stop TAPE : NORMAL...
  • Page 9: Pc Board

    CASSETTE DECK UNIT PC BOARD (Component side view) KEY CONTROL UNIT Q1003 SW1007 SW1002 OP/CL EJECT D1033 J1013 D1032 J1001 Q1001 J1015 J1014 J1002 J1003 Q1002 D1031 V1001 SW1004 SW1003 CN1001 (TAPE EQ) (CD) C1003 D1035 J1018 D1034 Q1007 Q1006 Q1005 Q1004 J1016...
  • Page 10 PC BOARD(Component side view) MAIN UNIT SPEAKERS SUPER WOOFER PRE OUT POWER UNIT PHONES POWER UNIT R642A R641A MAIN UNIT Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 11 MAIN BOARD(1/2) JK301 R315A AUX IN PICKUP (KSS-213C) R316A FCS- TRK- TRACKING COIL TRK+ CN201 FOCUSING COIL FCS+ SLD+ 4.4V R256A 10 -VPD R201A 68K C237 10u16 R320A 2.2K R324A 470 SHORT R202A 68K SLD- C206A C208A C238 10u16 R319A R323A 470 LAND SLT-SW...
  • Page 12 Refer to the voltage during PLAY unless otherwise speci- fied; The value shown in ( ) is the voltage measured at the moment of STOP. DISPLAY BOARD -CN801 15 14 13 12 11 SW401 CN401 CN402 RXD-M31 (1/4) RXD-M31 Y39-3210-11...
  • Page 13 PACK 0.01 : AC240V~ 50Hz R766A -32.2V Q612 (T,E) : AC230V~ 50Hz D607 D609 SENSOR PLAY 13.4V R649 PHOTO Q711 SOL. C639 F604 3.3M R646 0.01 MOTOR DRIVER 500mA 250V 1/2W BOARD -CN901 PLAY Q709 RXD-M31 5.0V Y39-3210-11 RXD-M31 (2/4)
  • Page 14: Parts List

    The measure- ENC2 ment value may vary depending on the measuring instruments used or on the product. 5.0V CN1001 u.+5V u.GND 5.0V OP/CL LED4 RXD-M31 LED5 LED0 Q1004-1007 LED1 Y39-3210-11 DRIVER RXD-M31 (3/4)
  • Page 15 R859A AM19 R863A R818A 47K CN801 Q801 KEY3 15 R864A AM18 R819A 47K KEY2 14 MAIN AM17 BOARD KEY1 13 -CN402 FLCL 12 FLCE 11 FLRST 10 FLDI VREF C802A 0.047 u.GND FLAC RXD-M31 FLAC FLAC FLAC Y39-3210-11 RXD-M31 (4/4)
  • Page 17 CD DOOR WASHER : N15-1026-46 SW401 WASHER : N15-1030-46 ANTENNA JK101 DIGITAL OUT OPTICAL JK302 AUX INPUT JK301 AC110- AC220- 120V~ 240V~ SW603 open/close panel SW1007 SW1002 tape EQ. SW1004 SW1003 IC1001 direction VOLUME SW1001 SW1005 SW1006 V1001 RXD-M31 TAPE...
  • Page 18 Parts No. Ref. No Parts No. Description Description Parts nation marks nation marks ress ress Parts RXD-M31 F07-1685-08 PVC COVER (BLACK) F07-1687-08 CD COVER A60-1719-08 FRONT CABINET F07-1688-08 9829 CD COVER (BLACK) ABS A02-2921-08 TOP CABINET J19-6023-08 213CDM CD MAGNET COVER-TOP...
  • Page 19 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 20 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 21 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 22 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 23 New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 24: Cassette Deck Unit

    New Parts New Parts Parts without Parts No. are not supplied. Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No.
  • Page 25: Cassette Mechanism

    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. Add- Desti- Ref. No Parts No. Description ress Parts nation marks CASSETTE MECHANISM A10-3157-08 CHASSIS BASE D01-0119-08...
  • Page 26: Specifications

    Dimensions ..........W : 180 mm H : 257 mm D : 275 mm Weight (net) ............5.1 kg KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Notes Notes ÷ Sufficient performance may not be exhibited at extremely cold locations (where water freezes).
  • Page 27 Av. Moema, 170-17˚, Andar-Cobertura “B”, Ed. Maximum Service Center, 04077-020 Moema, São Paulo-SP-Brasil KENWOOD ELECTRONICS U.K. LIMITED KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB., United Kingdom KENWOOD ELECTRONICS BELGUM N.V. Meachelsesteenweg 418, B-1930 Zaventem, Belgium KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrücker Str.

This manual is also suitable for:

Ls-m31Ls-m31s