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POTABLE MD PLAYER
DMC-J3
SERVICE MANUAL
Knob*
(K29-)
Miniature phone jack
(E11-0381-05)
Knob
(K29-6828-03)
System ............................ Mini disc digital audio system
Read method .................. Noncontact optical reading system
(semiconductor laser)
Sampling frequency ...... 44.1 kHz
Audio compression ....... ATRAC (Adaptive Transform Acoustic Cording)
Number of channels...... 2 channels
Frequency response ...... 20 Hz to 20,000 Hz (± 3 dB)
Wow & flutter ................ Less than unmeasurable limit
(± 0.001 % W.PEAK)
Input/Output terminal .. Remote control/Phones jack
Rated power output ......
9 mW+9 mW
Power source
DC IN jack (4 – 5.1V)
: Specially provided AC adaptor
: Car battery adaptor (sold separately, DC-C70)
DC 1.5V : Commercially sold AA alkaline battery (LR-6) X 1
DC 1.2V : Specially provided rechargeable battery (NB-130) X 1
(Charging time : About 4 hours)
1. KENWOOD follows a policy of continuous advancements in development, For reason specifications may be changed without notice.
Notes
Notes
2. The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).
In compliance with Federal Regulations, following are reproduc-
tions of labels on, or inside the product relating to laser product
safety.
Knob*
Dressing panel*
(K29-)
(A21-)
TRACK NO.
7
4
Knob
(K29-6827-03)

SPECIFICATIONS

© 1998-3/B51-5411-00 (K/K) 3163
Dressing panel*
Front glass
Lid assy*
(A21-)
(B10-2407-04)
(A53-)
BATTERY
£
¢
Knob*
Battery cover*
(K29-)
(A09-)
OPEN
Battery life (Fully charge, with "auto PS" setting ON)
Specially provided rechargeable battery (NB-130) X 1
........
......
..........................
..........................
Commercially sold AA alkaline battery (LR-6) X 1
......
......
......
......................
• At 0.5mW+0.5mW output (32 Ω load ).
• Standard value during continuous use/charging in an temperature of
25˚C.
• Time of use may vary depending on battery maker, battery
type, use environment, and temperatute.
• Time will be shorter when "PS off" Mode is set.
Dimensions (not including protruding parts)
W :99 mm (3-7/8")
H :17 mm (11/16")
D :75 mm (2-15/16")
Weight (Net) ................ 115g (0.25 lb)
not including the accessory rechargeable batter
140g (0.31 lb)
including the accessory rechargeable battery
KENWOOD-Corp. certifies this equipment conforms to DHHS
Regulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.
DC jack
(E03-0357-05)
Blind plate
(F19-1086-04)
* Refer to parts list on page 17.
..........................
Approx. 5 hours
......................
......................
Approx. 6 hours

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   Summary of Contents for Kenwood DMC-J3

  • Page 1: Specifications

    140g (0.31 lb) (Charging time : About 4 hours) including the accessory rechargeable battery 1. KENWOOD follows a policy of continuous advancements in development, For reason specifications may be changed without notice. Notes Notes 2. The full performance may not be exhibited in an extremely cold location (under a water-freezing temperature).

  • Page 2

    DMC-J3 CONTENTS / ACCESSORIES Contents SPECIFICATIONS .........Top cover PC BOARD ..............11 CONTENTS / ACCESSORIES ........2 SCHEMATIC DIAGRAM ..........12 CONTROLS ..............3 EXPLODED VIEW .............15 CIRCUIT DESCRIPTION ..........4 PARTS LIST...............17 Accessories Batteries : NB130 (1) Carrying case (1) AC adapter (1) *...

  • Page 3: Names And Functions Of Parts

    DMC-J3 CONTROLS Names and functions of parts Main Unit HOLD knob HOLD indicator Play indicator HOLD Remaining battery life indicator Track mode indicator 9 (VOL. UP) key 3 (PLAY / PAUSE) key 7 (STOP/ OFF) key DC IN jack ( E x t e m a l p o w e r TRACK NO.

  • Page 4: Power Supply

    Control Mechanism SYSTEM Headphone AMP Mechanism Pickup CXD2655R, CXA2523AR P_HP_POWER P_XRST (D40-1576-01) P_LDON P_XLAT, P_SWDT, P_SRDT, P_SCLK (T25-0071-05) P_XINT, P_ADSY Motor drive P_SENS P_FOK P_CTL, P_PASS P_SYS_POWER, P_SP P_SPOUT (D / A output ) P_XSTBY P_SPIN (A / D input ) Power supply Display P_AD_BATT1...

  • Page 5

    DMC-J3 CIRCUIT DESCRIPTION 1-2 Pin description Pin No. Pin Name Description /XLAT Control latch to CXD2655R /XRST Reset to CXD2655R No use /LDON The laser of the pickup output on/off. L:output. BEEP Beep sound output. No use /RESET – Microprocessor reset.

  • Page 6

    DMC-J3 CIRCUIT DESCRIPTION Pin No. Pin Name Description SPOUT D/A spindle drive voltage output. AVREF2 – Reference voltage for D/A. AVREF3 – GND for D/A. NO JTYPE Destination selector. L:Japan. VORG. No use /XINT Interrupt from XINT port of CXD2655R. L:interrupt.

  • Page 7

    DMC-J3 CIRCUIT DESCRIPTION 2. DSP, ACIRC / ATRAC Recoder : CXD2655R (X33 : IC7) Pin description Pin No. Pin Name Description MNT0 Monitor signal interface. MNT1-3 Monitor output port. SWDT Data input port of microprocessor serial interface. SCLK Shift clock input port of microprocessor serial interface.

  • Page 8

    DMC-J3 CIRCUIT DESCRIPTION Pin No. Pin Name Description PEAK Laser peak hold signal input port. BOTM Laser bottom hold signal input port. ABCD Laser input port. Focus error signal input port. AUX1 Auxiliary port 1 Center voltage input port. ADIO Monitor port of A/D converter input signal.

  • Page 9

    DMC-J3 CIRCUIT DESCRIPTION 3. TEST MODE 3. TEST MODE * Test mode I is required when disassemble or replace the Low reflection Pit/Low reflection groove)which store a laser pickup and MD mechanism. balance setting value E2PROM. At the time of auto-...

  • Page 10

    DMC-J3 CIRCUIT DESCRIPTION 3. TEST MODE 3. TEST MODE 2) To change setting value is available +2 or -2 steps by 7) Average data of VC/FE Offset VOL UP/DOWN key. Disc stops to turn after memoriz- [127F7F] mid 2 figures: VC offset...

  • Page 11

    BOARD(Component side view) X13-115X-XX (J70-1142-32) PHONES X27-1690-00 (J70-1175-02) E35-2150-03 (J80-0014-11) STOP S.DOWN V.DOWN V.UP S.UP PLAY Refer to the schematic diagram for the value of resistors and capacitors.

  • Page 12

    MECHA. ASS’Y MDP-01(2) : (X92-2130-10) (X33-115X-XX) PICKUP BLOCK LDGND ILCC 100P 1.3V FCS- TRACKING COIL 1.3V USER USER AGC, RF AMP TRK+ OP AMP COMP 1.4V TRK- PEAK, FOCUS COIL 1.3V BOTTOM DETECTOR FCS+ 3T DETECTOR 1.4V 1.2V 1.3V 1.3V ABCD 0.7V 1.3V...

  • Page 13

    2.8V the product. Refer to the voltage during RECORDABLE MD IC1 : BU9729K PLAY unless otherwise specified; The value shown in ( ) is 1.8V DMC-J3 EEPROM DC-DC the voltage measured at the moment of STOP. The voltage 100Kx2 CONVERTER 7.5K...

  • Page 14

    DMC-J3 EXPLODED VIEW (MECHANISM) A ø1.7x3 : N09-3279-05 B ø1.4x1.8(BLK) : N09-3337-05 C ø1.4x3 : N09-3369-05 D M1.2x2 : N39-1220-46 E ø1.8 WASHER : N19-1416-04 MDP-01(2) Parts with exploded view numbers larger than 700 are not supplied.

  • Page 15

    DMC-J3 EXPLODED VIEW (UNIT) : N09-3409-05 : N09-3379-05 B M1.4x2.2 : N09-3430-05 C M1.4x1.5 : N19-1416-04 HEADPHONE HOLD X27-1690-00 DC-IN X33-1150-00 Parts with exploded view numbers larger than 700 are not supplied.

  • Page 16

    Description Ref. No Parts No. Description ress Parts nation marks ress Parts nation marks G02-1646-13 FLAT SPRING DMC-J3 H21-0347-04 PROTECTION SHEET A01-3568-13 METALLIC CABINET ASSY H25-0336-04 PROTECTION BAG A01-3570-13 METALLIC CABINET ASSY E1T1 H25-1588-04 PROTECTION BAG A01-3572-13 METALLIC CABINET ASSY...

  • Page 17

    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 18

    DTC114TUA DIGITAL TRANSISTOR DTC124EUA DIGITAL TRANSISTOR DMC-J3(BL) – – – – – – – DMC-J3(S) : Silver, DMC-J3(BL) : Blue DTA114TUA DIGITAL TRANSISTOR DTC124EUA DIGITAL TRANSISTOR MECHANISM(X92-2130-10) A10-3401-13 CHASSIS ASSY D10-3769-04 D10-3648-04 ARM ASSY L : Scandinavia K : U.S.A.

  • Page 19

    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.

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