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Kenwood 1050MD Service Manual
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Kenwood 1050MD Service Manual

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STEREO MINIDISC RECORDER
1050MD/DM-5090
DM-9090
SERVICE MANUAL
KENWOOD badge*
(B43-)
STEREO MINIDISC RECORDER DM -5090
DISC LOADING MECHANISM
POWER
TIMER
REC OFF PLAY
- ON – OFF
Knob*
(K27-)
Metallic cabinet*
(A01-)
Phono jack
(E63-0120-05)
In compliance with Federal Regulations, following are
reproductions of labels on, or inside the product relating to
laser product safety,
Front glass*
(B10-)
LEVEL
0
METER
TIME
TITLE
MODE
DISPLAY
INPUT
SEARCH
Panel*
(A29-)
Optic receiving module
(W02-1181-05)
LINE
DIGITAL
REC
PLAY
REC
PLAY
IN
OUT
IN
OUT
L
L
1 OPT.
2 COAX.
COAX.
OPT.
R
R
R
R
Phono jack*
Oscillating module
(E63-)
(W02-1114-05)
©
Panel*
(A60-)
AUTO/
EDIT /
8
MANU.
MONITOR
REPEAT
SPACE
DELETE
Phono jack*
(E11-)
SYSTEM
CONTROL
KENWOOD-Corp. certifies this equipment conforms to
DHHS Regulation No.21 CFR 1040.10, Chapter 1,
Subchapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM.
1997-11/B51-5387-00 (K/K) 3191
Knob*
Knob*
(K29-)
(K29-)
REC LEVEL
REC INPUT
7
3
MIN
MAX
REC MODE
/CHARA.
1
¡
PHONES LEVEL
JOG DIAL
SET
4
¢
MIN
MAX
PHONES
ENTER
D.R.I.V.E.
Dynamic Resolution Intensive Vector Enhancement
Phone jack (3P)
(E11-0190-05)
AC power cord*
(E30-)
Power cord bushing
(J42-0083-05)
Illustration is DM-5090.
*Refer to parts list on page 40.

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Summary of Contents for Kenwood 1050MD

  • Page 1 Illustration is DM-5090. *Refer to parts list on page 40. In compliance with Federal Regulations, following are KENWOOD-Corp. certifies this equipment conforms to reproductions of labels on, or inside the product relating to DHHS Regulation No.21 CFR 1040.10, Chapter 1, laser product safety, Subchapter J.

  • Page 2: Table Of Contents

    1050MD/DM-5090/DM-9090 CONTENTS/ACCESSORIES/CAUTIONS CONTENTS CONTENTS/ACCESSORIES/CAUTIONS....2 PC BOARD ............... 15 EXTERNAL VIEW ............3 SCHEMATIC DIAGRAM ........... 21 BLOCK DIAGRAM ............4 EXPLODED VIEW .............37 CIRCUIT DESCRIPTION ..........5 PARTS LIST...............40 WIRING DIAGRAM ............14 SPECIFICATIONS .............49 Accessories Audio cord (2) System control cord (1) Optical fiber cable(1)

  • Page 3: External View

    1050MD/DM-5090/DM-9090 EXTERNAL VIEW Knob Knob Knob KENWOOD badge Front glass Panel Assy (K27-2178-04) (K29-6700-03) (K29-6695-14) (B43-0302-04) (B10-2362-04) (A60-1258-02) REC LEVEL REC BALANCE STEREO MINIDISC RECORDER DM-9090 JOG DIAL ¢ REC MODE /CHARA. ENTER POWER - O N – OFF EDIT/...
  • Page 4 X25-5940-11: DM-5090(T,E) X25-5940-XX -02: DM-5090(J) -12: DM5090(K,M,T,E) MECHA: MDM-04 (X33-1100-00) X32-3470-00: DM-9090 ONLY SM5842 KAN05 IC7-14 IC181 24bit DIGITAL ANALOG ANALOG HEAD DRIVER RESOLUTION 20bit(24bit) D/A CONV. ANALOG D.P.A.C. DIGITAL FILTER RECORDING ANALOG HEAD IN/OUT DISC IC8 CS5335 256fS 20bit ANALOG TEMP.

  • Page 5: Circuit Description

    1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 1. Mechanism microprocessor : uPD784215GF508 (X25- , IC31) 1-1 Pin description Name Description N.C. EXLAT Output port of latch signal to IC32 (TC74HC4094) EXCK Clock output port to IC32 (TC74HC4094) SRAM WR SRAM WR SRAM CS L; SRAM enable...
  • Page 6 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION Name Description RESET Microprocessor hard reset Remocon signal input terminal XINT Input port of interrupted status from CXD2652AR (IC2) Microprocessor chip enable H; Enable / L; disable SQSY Input port of sub code Q from CXD2652AR (IC2)
  • Page 7 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 1-2. Initialization 1-3. Switch control table POWER = ON (DM-9090,DM-5090) INI SW1 AVref(0.8~1.0AVref) Mecha. u-COM MODE REC INPUT = ANALOG 0.7AVref(0.6~0.8AVref) AUTO/MANUAL = AUTO 0.5AVref(0.4~0.8AVref) DMF-7002S (J type) 0.3AVref(0.2~0.4AVref) DM-9090 FADE = OFF 0.0AVref(0.0~0.2AVref) DM-5090 PLAY MODE...

  • Page 8: Circuit Description

    1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 2-2 Pin description (uPD784035GC) Name Description SCLK Text data read clock N.C. No used XMODE Text data decoder reset L: Power Down N.C. No used RESET Reset signal input Microprocessor power supply 9,10 X2,1 12.5MHz oscillator 12~20 N.C.
  • Page 9 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 3. Test mode of the unit 4. Mechanism test mode 3-1 Setting of the test mode 4-1 Setting the test mode While pressing the [STOP] key, plug the AC power cord Connect a plug of AC power cord to an outlet of AC, while into the AC wall outlet.
  • Page 10 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 2. Change the playback point. 2. The DELETE key can be pressed at any time to stop the (1) Press the ENTER key during continuous playback. The recording. display then changes as follows. 3. An erasure prevention control is not detected in the test mode.
  • Page 11 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 4-7 Precaution on use of test mode 5) Take care that VC and GND (ground) are not connected on the oscilloscope when two or more signals are moni- An erasure prevention control is not detected in the test tored on the oscilloscope.
  • Page 12 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION Don't output the laser power of 7.0mW more than 15sec. 6. Press the ENTER key to display "EFB=##XSAVE" momentarily. After that, "EF=$##MOR" is displayed. 7. Next turn the JOG DIAL to display "LDPWR CHECK". (Laser power READ power, focus servo ON, tracking 8.
  • Page 13 1050MD/DM-5090/DM-9090 CIRCUIT DESCRIPTION 2. The C1 error rate fluctuates. Therefore, perform the (Traverse waveform) adjustment according to the observed mean value. C1 error Specification : A = B 16. Press the ENTER key to display “EFB=##XSAVE” momentarily and save the adjustment result in non- volatile memory.
  • Page 14 COAX DM-9090 OPT. DM-5090 DM-9090 DIGITAL INPUT 1 DM-5090 POWER SUPPLY UNIT MD MECHA. COAX (X00-2840-01) (B/2) (D40-1533-X5) DM-9090 2 DM-5090 PRIMARY UNIT (X00- ) (A/2) COAX : AC100V 50/60Hz DIGITAL (GRY) : AC120V 60Hz OUTPUT : AC110-120V/220-240V~ 50/60Hz OPT. (T,E) : AC230V~ 50Hz SL16...

  • Page 15: Pc Board

    PC BOARD(Component side view) MD mechanism unit (X33-1100-00) Signal processing unit (X32-3470-00) Refer to the schematic diagram for the value of resistors and capacitors.

  • Page 16: Schematic Diagram

    PC BOARD(Component side view) MD control circuit unit (X29-2580-00) Electric unit (X25-5940-12) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 17 PC BOARD(Component side view) Power supply unit (X00-2840-51) Display unit (X14-4380-00) Refer to the schematic diagram for the value of resistors and capacitors.
  • Page 18 A MECHA. (D40-1533-*5) (X33-1100-00) HEAD DRIVER (5V) < > (0V) < > DRAM CN104 HR901 OVER WRITE HEAD (0V) (0V) 0V (3.2V) <3.2> 3.3V < > < > CN103 3.3V 3.3V C184 +3.3V +3.3V +3.3V 22u8 3.3V C124 1.8V (2.5V) 0.3V (2.8V) <2.5V>...
  • Page 19 DADT X25- M+5V LRCK M+5V M+5V LOAD-IN LOAD-OUT STOP +3.3V 3.3V PLAYBACK RECORD < > MEASUREMENT IMPOSSIBLE H+5V H+5V PLAYBACK DOUT PLAYBACK(DIGITAL OUTPUT) RECORD RECORD(DIGITAL INPUT) C196 512FS GND LINE +B LINE HGND -B LINE 1050MD/DM-5090/DM-9090 (1/3) 1050MD/DM-5090/DM-9090 H+5V Y22-7000-00...
  • Page 20 ELECTRIC UNIT (X25-594X-XX) -33V DIGITAL PLAY 1.7V H GND IC38 BUFFER 512fs 3.4V 4.9V R319 D OUT 100K 3.3V H+5V 3.4V 1.1V MEMORY D IN 4.9V CHIP 1.6V 3.3V SELECT CONTROLLER LOAD-OUT 5.0V R389 IC34 LOAD-IN 2.4V M+5V 1.7V LRCK MECHA.
  • Page 21 -33V -33V 5.0V -33V 5.0V R320 100K SERI PARA CONVERTER IC32 IC33 5.0V 4.9V R378 100K R377 100K R376 100K 5.0V 5.0V MEMORY IC MEMORY IC R190 8BIT MEMORY LATCH 5.0V IC29 4.5V 5.0V D.R.I.V.E ON/OFF CONTROLLER 5.0V 5.0V 4.5V R361 5.2V 100K...

  • Page 22: Parts List

    CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to The DC voltage is an actual reading measured with a high impedance type voltmeter. The parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type measurement value may vary depending on the measuring instruments used or on the CN10 and rating fuse(s).
  • Page 23 MUTE ON:2.1V : UDZ6.2B OFF:-7.7V -12V -12V : UDZ18B : UDZ15B : DAP202U DM-9090 DM-5090 +12V X00-B/2 X00-A/2 DIGITAL RECORD LINE (DIGITAL INPUT) DIGITAL PLAYBACK LINE (DIGITAL OUTPUT) DIGITAL LINE GND LINE +B LINE 1050MD/DM-5090/DM-9090 (2/3) -B LINE 1050MD/DM-5090/DM-9090 Y22-7000-00...
  • Page 24 PROCESSOR UNIT (X32-3470-00): DM-9090 ONLY CAUTION: For continued safety, replace safety critical compo- nents only with manufacturer's recommended parts (refer to 2.5V parts list). indicates safety critical components. For continued IC7,9,11,13 D-LATCH 10.9V protection against risk of fire, replace only with same type and R177 +11V 3.3K...
  • Page 25 DISPLAY UNIT (X14-4380-00) (B/5): DM-9090 ONLY OVER (-dB) REPEAT FADE ANALOG DIGITAL TITLE MONO 32kHz SEARCH OVER (-dB) MONITOR SINGLE COPY 44.1kHz MANUAL TOTAL 48kHz A.PAUSE REMAIN (1G-12G) 1.8K U+5V -15.7V (X14- ) (C/5) (X14- ) (A/5) -15.3V AM16 AM33 AM15 AM34 AM14...
  • Page 26 AC19V EUROPE 2-71 L07-2270-05 MUTE CN12 U.K. AUDIO MAIN POWER AC19V AUDIO L-VAL AC10V SYSTEM R43 1K L-FIX AC5.9V 2.7K 1050MD/DM-5090/DM-9090 (3/3) AC10V SYSTEM (X00-285X-XX) 10.9V 22u16 +12V AC30V (B/2) PHONES X25- (2/2) SHIELD BUFFER LEVEL -CN1 -VFL -11.6V (RED)
  • Page 27 1050MD/DM-5090/DM-9090 EXPLODED VIEW (MECHANISM) : N39-1745-46 ø2.6x10 : N09-2817-05 M1.7x4.5 : N82-2004-46 M1.7x2 : N09-3104-05 ø2x4 : N89-2008-46 M1.7x3 : N09-3279-05 ø2x8 : N89-2606-45 ø2x6 : N09-4145-05 ø2.6x6(BLK) ADx2 (B/2) AFx2 X29-2580-00 (A/2) X33-1100-00 Slit When assembling a mechanism, adjust "slit A and slit B "...
  • Page 28 AC110- AC220- 120V~ 240V~ SYSTEM CONTROL OPTICAL REC IN (B/2) MAIN POWER DIGITAL X33-1100- LINE PLAY OUT (A/2) ø 3x8 : N09-3324-05 X25-5940-02 ø 3x10 : N89-3010-41 (B/2) ø 3x8 FLAT : N09-1445-05 ø 2.6x8 : N82-2608-46 ø 3x8(BLK) : N89-3008-45 ø...
  • Page 29 PLAY SYSTEM CYBER CONTROL TITLER LINE COAX. OPT. COAX. OPT. X25-5640-00 N0 9 - 14 4 5 - 05 N0 9 - 28 1 7 - 05 N0 9 - 33 2 4 - 05 ø2 . 6x8 N8 2 - 26 0 8 - 46 M4x16 N8 4 - 40 1 6 - 46 ø3 x 6(BL K )
  • Page 30 Parts No. Description Ref. No Parts No. Description ress Parts nation marks marks ress Parts nation 1050MD/DM-5090 T2: GOLD H50-2429-04 ITEM CARTON CASE H50-2556-04 ITEM CARTON CASE A01-3342-11 METALLIC CABINET H50-2557-04 ITEM CARTON CASE A01-3369-01 METALLIC CABINET KMTE A09-0362-08 BATTERY COVER...
  • Page 31 LINE FILTER RD7.5JS(B) ZENER DIODE D3 -5 HSS104 DIODE S40-1153-05 PUSH SWITCH D3 -5 1SS133 DIODE FIP12XM1GA INDICATOR TUBE Power supply unit (X00-2850-21: 1050MD/DM-5090) LC75710NE MOS-IC C1 -3 C91-1488-05 6800PF 250VAC NJM4580D IC(OP AMP X2) Q1 -5 2SC2458(Y,GR) TRANSISTOR E40-4245-05...
  • Page 32 ELECTRO 47UF 16WV L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii) T : Europe...
  • Page 33 RK73FB2A221J CHIP R 1/10W L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii) T : Europe...
  • Page 34 RK73FB2A473J CHIP R 1/10W L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii) T : Europe...
  • Page 35 ZENER DIODE UN5219 DIGITAL TRANSISTOR L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii)
  • Page 36 C143-146 CQ93FMG1H391K MYLAR 390PF L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii) T : Europe...
  • Page 37 R92-0670-05 CHIP R 0 OHM L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii)
  • Page 38 (MAIN) G13-0560-08 CUSHION L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD L : Scandinavia K : USA P : Canada R : Mexico 1 : 1050MD Y : PX(Far East, Hawaii) T : Europe...

  • Page 39: Specifications

    1050MD/DM-5090/DM-9090 SPECIFICATIONS 1050MD / DM-5090 [Format] System ....................Minidisc digital audio system Laser ....................Semiconductor laser Recording method ................Field modulation overwrite method Audio compression ................ATRAC (Adaptive TRansform Acoustic Coding) Playing rotation ................Approx. 400 rpm ~ 900 rpm (CLV) [D/A conversion] D/A conversion ................1 Bit+ D.R.I.V.E. conversion Oversampling..................8 fs (352.8 kHz)
  • Page 40 14-6,Dogenzaka 1-chome, Shibuya-ku, Tokyo, 150 Japan under differing local conditions. This manual is based on Europe (E) standard, KENWOOD SERVICE CORPORATION and provides information on regional circuit modification through use of alter- P.O BOX 22745, 2201 East Dominguez St., Long Beach, CA 90801-5745, U.S.A.

This manual is also suitable for:

Dm-5090Dm-9090