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Kenwood HM-531MD Service Manual
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Kenwood HM-531MD Service Manual

Kenwood HM-531MD Service Manual

Kenwood micro hi-fi component system service manual
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MICRO HiFi COMPONENT SYSTEM
RXD-M51/M51MD
SERVICE MANUAL
(HM-531/581MD)
Dressing panel
(A21-3707-03)
Knob
(K29-7392-02)
on/standby
CD 6
4
1
Dressing panel
(A21-3721-03)
Auto Reverse
• Refer to DM-3090 service manual(B51-5396-00), if
require the following items in detail.
1) MD mechanism(MDM-98A) disassembly for repair
(page5,6)
2) Semiconductor description
IC1101:RF signal control(page9)
IC1201:ENDEC/ATRAC(page10,11)
IC1401:system microcomputer(page 12,13)
Panel (MD)
(A29-1022-04)
1BIT DUAL D/A CONVERTER
standby/timer
DISC LOADING MECHANISM
MD 6
MD rec
7
¢
TUNER
¡
band
TAPE/preset
micro hi-fi component system
Front glass
(B10-3419-14)
© 1998-9/B51-5477-00 (K/K) 2138
Front glass
(B10-3418-03)
sound
repeat
menu
set/demo
m
0
AUX
2 3
direction
0
push
TAPE
OPEN
TAPE rec
remote
phones
Caution : No connection of ground line if disassemble the
unit.
Please connect the ground line on rear panel,
PCBs, Chassis and some others.
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM
Panel
(A60-1496-11)
Knob
(K29-7393-03)
Knob
(K29-6358-14)
Indicator
(B12-0351-03)
Knob
(K29-7394-03)
Miniature phone jack
(E11-0344-05)
Illustration is RXD-M51MD.
* Refer to parts list on page 49.

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Summary of Contents for Kenwood HM-531MD

  • Page 1 (page5,6) PCBs, Chassis and some others. 2) Semiconductor description IC1101:RF signal control(page9) KENWOOD-Crop. certifies this equipment conforms to DHHS IC1201:ENDEC/ATRAC(page10,11) Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J. IC1401:system microcomputer(page 12,13) DANGER : Laser radiation when open and interlock defeated.

  • Page 2: System Configuration

    RXD-M51/M51MD CONTENTS / ACCESSORIES / CAUTION Contents CONTENTS / ACCESSORIES / CAUTION ....2 PC BOARD ..............13 EXTERNAL VIEW/DISASSEMBLY FOR REPAIR..3 SCHEMATIC DIAGRAM ..........23 BLOCK DIAGRAM ............4 EXPLODED VIEW .............45 CIRCUIT DESCRIPTION ..........5 PARTS LIST...............49 ADJUSTMENT ............11 SPECIFICATIONS .............59 WIRING DIAGRAM ............12 Accessories Please confirm that the following accessories are present.
  • Page 3 RXD-M51/M51MD EXTERNAL VIEW / DISASSEMBLY FOR REPAIR EXTERNAL VIEW Lock terminal board (E70-0052-05) Phono jack (E63-1024-05) Lock terminal board (E70-0053-05) Power cord bushing AC power cord * (E30-) (J42-0083-05) Illustration is RXD-M51MD. * Refer to parts list on page 49. DISASSEMBLY FOR REPAIR <...
  • Page 4 (X07) (X09) AUX IN 200mV/47k AUX IN A301 (W02-) TUNER PACK 425mV (X14) Q5-16 TUNER BASS +3dB PB AMP OUT 580mV DECK 200mV POWER HEADPHONES DOLBY B TREBLE EX. BASS BIAS TRAP Q3,4 LOUD L3,4 Q17-21 MUTE REC AMP PROTECTION CIRCUIT DECK +12V...

  • 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 Receiving frequency Channel PORT 1-1 Setting of initial conditions Desti- Desti- DSW2 Band range space nation DSW4 DSW3 • If a mechanism error occurs, “C” is indicated on the While pressing the [SET] key, plug the AC power cord nation display.
  • Page 6 4-3 Pin description of main microprocessor: M30622MA-159FP Pin No. Name Description Pin No. Name Description SYSTEM IC(LC75396)/PLL IC(LC72131) CE MD CE MD CE CONTROL L : CE PLL DO PLL DATA INPUT ENC1 ROTARY ENCODER1 (VOL. INPUT A) TUNER SD DETECT INPUT H : NO TUNED L : TUNED ENC2...
  • Page 7 5. Composition (MD section) 5-2 Pin description of MD u-COM: uPD78058GC-B20 (X33 :IC1) Pin No Name Description 5-1 Microprocessor periphery block diagram PDOWN MDM-98A POWER DOWN DETECTOR X09, IC205 SEARCH CD SEARCH OUTPUT LOAD IN LOAD SWITCH INPUT • DISPLAY CONTROL Avss –...
  • Page 8 (4) Basic operation in test mode. 6-3 Test mode of MD player The muting during mode selection is not controlled in the test mode. 6-3-1 Inspection mode The test mode is cancelled when the AC power is turned OFF. Setting : While pressing the [MD REC] Key, plug the AC power cord into an AC power outlet. (5) The operation of the keys in the test mode.

  • Page 9: Adjustment

    • Test Mode Step No. Setting Method Remarks Display Step 5 Continuous playback (groove section) 1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.) • The adjustment value is output with the aid of system controller interface. Step 6 Press the MD STOP button.
  • Page 10 6-4 Test mode of CD player 7. MD mechanism error message 6-4-1 Main unit DISPLAY DESCRIPTION (1) Setting of the test mode BLANK DISC Non Recorded disc While pressing the [CD PLAY] key, plug the AC CAN'T COPY Inhibit to record by SCMS power cord into an AC outlet.

  • Page 11: Pc Board

    Adjustment of CD player INPUT OUTPUT CASSETTE TAPE ALIGNMENT INPUT OUTPUT PLAYER ALIGNMENT ITEM ALIGN FOR FIG. ITEM ALIGN FOR FIG. SETTING SETTING DECK SETTING POINTS SETTING SETTING SETTING POINT Unless otherwise specified, set the respective switches as follows: 0dBs = 0.775V TEST MODE : While pressing the [DISC 3 PLAY] key, plug the AC power cord into the AC outlet.
  • Page 12 USED (M)TYPE USED RXD-M51MD J201 (F09-0140- FM 75 E35-2015- 5 FM 300 CASSETTE CN206 MECHANISM (X07- ) (E/5) (D40-1601- AM ANT DISPLAY UNIT (X14-4870-00) (A/2) USED (T,E)TYPE J201 CN207 AM ANT WH202 L-ch CD MECHANISM USED (D40-1612- Lch 1 SPEAKERS RXD-SE5MD/ AUX IN (X07- ) (B/5)

  • Page 13: Schematic Diagram

    PC BOARD PARTS LOCATION MD MAIN PWD-A (TOP VIEW) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 14 PC BOARD PARTS LOCATION MD MAIN PWB-A (BOTTOM VIEW)
  • Page 15 PC BOARD (Component side view) MD SPINDLE MOTOR MD SLED MOTOR MD LOADING MOTOR M1951 M1952 M1953 TO MD MAIN PWB TO MD MAIN PWB TO MD MAIN PWB CN1603 CN1602 CN1604 MD PICK UP UNIT RECORD HEAD FLEXIBLE CABLE SW1953 TO MD MAIN PWB LEAD IN...
  • Page 16 PC BOARD(Component side view) MD UNIT X33-1172-71 : T1E1 Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 17 PC BOARD (Component side view) MAIN AMP UNIT X07-2992-71 A/5 : T1E1 2-72 : T2E2 0-21 : M1 SPEAKERS GND(12V) X07 B/5 GND(8V) R104 (WH2) F.OFF PROTECTION R114 R111 CN11 R112 R-ch R115 +5.6VAVR. L-ch MUTEDRIVE. RELAY DRIVE A CLASS -30VAVR X07 D/5 X07 E/5...
  • Page 18 PC BOARD (Component side view) AUDIO UNIT X09-6122-71 A/2: T1E1 2-72 : T2E2 0-21 : M1 X09 B/2 S201 W180 B TL-DRIVER W145 CN202 W128 R222 C256 R209 W116 W506 RF-AMP WH201 R285 A201 W624 WH201 IC202 W178 Q203 IC201 W100 D208 DIGITAL...
  • Page 19 PC BOARD (Component side view) DISPLAY UNIT X14-4870-00 A/2 SOUND REPEAT MODE /DEMO POWER /MULTI (TUNER) (TUNER/BAND) EJECT (Dolby) (T.E.) (AUX) STOP SKIP UP TUNER/BAND SKIP DOWN X14 B/2 TAPE PHONES TAPEREC Refer to the schematic diagram for the value of resistors and capacitors.

  • Page 20: Parts List

    NOT USED RXD-M51(M,T,E) MD MECHANISM (D40-1602- 5) MDM-98A IC1101 IR3R55 MECHA. (SW PWB) IC1201 LR376484 CN1901 IC1202 IX2474AF CW1901 R1902 LEAD IN IC1300 74ACT02F 1.8K LEAD IN WRITE HINF IC1401 IX0253AW HINF +4.8V +4.8V IC1402 S29294A SW1951-A IC1601 BA5984FP LOADING LOADING IC1701 UDA1344...
  • Page 21 CN1401 C1400 C1401 0.022 0.022 +4.8V +4.8V CN1501 R1513 R OUT AA.GND R1512 +4.8V L OUT C1713 R1713 ANALOG R1612 +3.2V 0.01 100K 220K 4.8V R1536 AD.GND R1516 R IN 2.2K AA.GND +3.2V +3.2V R1515 L IN 2.2K R1701 3.2V 5.0V 5.0V Q1700...
  • Page 22 TUNER PACK (W02-2667-05) RXD-M51(T,E)/RXD-M51MD(T,E) TYPE DISTORTION 180K-1M (270K) RF AMP (ST) X09-A/2 FET1 0-470 -1/2 100P -A301 0-5P (1P) X09-A/2 -1/2 -A301 +12V VCC12V L-OUT R-OUT STEREO 6.8K-18K FM/AM/ 3.3K 0.022 (10K) SIGNAL SYSTEM FM DET 330-560P (430P) DECODER ANTI-BIRDIE RF AMP P-DET STEREO...
  • Page 23 X09-A/2 TUNER PACK -1/2 (W02-2666-05) RXD-M51(M) -A301 180K-1M (270K) DISTORTION RF AMP (ST) 0-470 100P FET1 0.01 ED-EMPH 0.01 X09-A/2 -1/2 -A301 +12V VCC12V L-OUT R-OUT STEREO 6.8K-18K FM/AM/ 6.8K 0.022 (10K) SYSTEM DECODER ANTI-BIRDIE 330-560P RF AMP (430P) P-DET STEREO BUFF MUTE...
  • Page 24 AUDIO UNIT TRAVERSE UNIT D40-1612-05 (X09-612X-XX) (A/2) (1/2) WH202 SPD+ SLT.SW 6 DISC MOTOR SPD- GND 5 SLD- 4 SLD+ R247 R248 R329 SLED MOTOR SLD+ 3 SLD- IC201 VR201 SPD- 1/4W R215 SPD+ RF AMP BIAS 4.7K SLT.SW SLT.SW CN202 R223 C295...
  • Page 25 CD +5V REG. Q201 R216 8.3V 1/4W 5.6V R328 R301 7.9V 1/4W 5.6V R258 R218 Q202 C224 C209 R226 R227 C218 220u16 1500P 3.3K 0.047 C289 100P 2.2V 2.5V IC203 (BOTTOM VIEW) ON: 0.7V 4.6V OFF: 0V 8.3V LINE MUTE SIGNAL DIGITAL DIGITAL...
  • Page 26 A201 DOUT DIGITAL OUT (OPTICAL) 2SA1286-T11 2SA1175 DTA124ESA DTC143TUA 2SB1370 X07-A/5 -CN11 2SA954 2SC2785 DTA143TSA RN1406 2SD2061 2SA992 DTC124ESA RN2404 WH203 2SC1845 DTC143TSA UN5116 R331 100 FAN HIGH/LOW 2SC2003 UN4112 UN5216 R332 100 FAN ON/OFF 2SC2878 UN4116 2SC3940A 2SA1048 RXD-M51MD (X09-6122-71) 2SD863 2SC1740S DESTINATION...
  • Page 27 AUDIO UNIT USED RXD-M51MD(T,E) (X09-612X-XX) (A/2) (2/2) MD UNIT (X33-117X-XX) R105 Lch 1 5.0V AUX IN 5.0V R106 Rch 2 PROTECTION(X33) 8.3V 5.8V 5.0V 0.01 22 1W MD-DVDD 5.8V CONTROLLER REG. D.GND 4.9V (CE) D-OUT(from CD) PLAY L CD-GND TEST PIN 3.8V PLAY R A.MUTE...
  • Page 28 50Hz EX BASS 100Hz 1KHz 10KHz 5.0V 4.9V 5.0V 4.8V 4.9V 4.8V 4.7u35 +12V 12.3V MAIN VR C123 (2/2) 5.1V 4.7u35 IC3(1/2) 4.7u35 C131 5.6V 5.6V 100P 5.6V 5.6V 5.6V R36 10K INPUT C125 C103 10u16 5.0V 10u16 5.0V C129 100P 5.1V C127...
  • Page 29 POWER AMPLIFIER UNIT (X07-299X-XX) (A/5) +26.3V Q5-8 47 1/4W 27.2V DIFFERENTIAL 1.1V Q17,18 AMPLIFIER 26.7V CURRENT PROTECTION 2.2K 2.2u50 1/4W DETECTOR 220P HEADPHONE 2.2K -0.6V 3.9K Q13-16 (X14- ) (B/2) RXD-M51 (X07-299X-XX) MUTING POWER DESTINATION C15, C19, C21, C81, CN4, UNIT No.
  • Page 30 DISPLAY UNIT (X14-4870-00) (A/2) REPEAT A.P.S. NEWS RANDOM SLEEP O.T.T. PROG. TP TA PTY NR T.E. TRACK NO. TOTAL AUTO TUNED STEREO CLOCK TAPE O.T.E. (G1-G11) (G13,G14) MHz BEST HITS G1-G11 TITLE SEARCH BEST HITS MD EDIT EX.BASS LOUD O.T.E. CLOCK (REPEAT) REPEAT...
  • Page 31 RXD-M51/M51MD EXPLODED VIEW (CD MECHANISM) WASHER : N19-1435-05 ø 2x3 : N30-2003-46 ø 2.6x6 : N32-0260-46 ø 2x5 : N86-2005-46 KCTB3H Parts with the exploded numbers larger than 700 are not supplied.
  • Page 32 RXD-M51/M51MD EXPLODED VIEW (MD MECHANISM) BKx2 BKx2 CW1903 SW1956 PWB-B SW1953 1952 SW1954 SW1955 CW1901 BCx2 PWB-A BLx4 BCx2 M1.7x9.5 : N39-1795-45 M1.7x7.5 : N09-3426-08 M1.7x2 : N39-1720-45 M1.7x2.2 : N09-3115-08 M1.7x3 : N39-1730-45 M1.7x2.5 : N09-3347-08 M1.7x8.9 : N09-3352-08 M1.7x5 : N39-1750-45 1.5W3.2-.5C...
  • Page 34 ø3x6(BLK) : N09-0395-05 M3x8 : N09-1648-05 ø3x10 : N09-3474-05 ø2.6x8 : N82-2608-46 ø4x6 : N86-4006-46 ø3x6 : N89-3006-46 ø3x12 : N09-0333-05 M3x10 : N09-2961-05 ø3x8 : N89-3008-46 (16P) ø3x8(BLK) : N89-3008-45 ø3x18 : N89-3018-46 ø3x12(BLK) : N89-3012-45 ANTENNA J201 INPUT X33-1170-01 X09-6120-00 sound...
  • Page 35 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 36 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 37 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 38 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 39 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 40 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 41 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 42 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 43 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 44 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 45: Specifications

    Dimensions ............W : 200 mm H : 245 mm D : 300 mm Weight (net) ..............5.9 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 46 P.O BOX 55-2791, Piso 6 plaza Chase, Cl. 47 y Aquilino de la Guardia Panama, Republic de Panama KENWOOD ELECTRONICS BRASIL LTDA. Av Indianópolis, 628, 04062-001 Planalto Paullsta 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:

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