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Kenwood DMC-K3 Service Manual

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PORTABLE MD PLAYER
DMC-K3
SERVICE MANUAL
Dressing panel
(A21-3741-04)
Knob
(K29-7477-04)
Battery cover
(A09-1118-03)
System ........................... Mini disc digital audio system
Read method ................. Noncontact optical reading system (semicon-
ductor laser)
Sampling frequency ...... 44.1 kHz
Audio compression ....... ATRAC (Adaptive Transform Acoustic Coding)
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) × 1
DC 1.2V : Specially provided rechargeable battery (NB-150) × 1
(Charging time : About 3 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
(K29-7475-03)
O P E N
Knob
(K29-7476-03)

SPECIFICATIONS

Battery life (Fully charge, with "PS on" setting ON)
Dimensions (not including protruding parts)
Weight (Net) ............ 115g (0.25 lb)
© 1999-1/B51-5503-00 (K/K) 2837
Lid assy
(A53-2123-03)
Escutcheon
(B07-2443-01)
Knob
(K29-7478-04)
Metallic cabinet assy
(A01-3664-03)
Illustration is DMC-K3(S).
Specially provided rechargeable battery (NB-150) × 1 ......... Approx. 7 hours
Commercially sold AA alkaline battery (LR-6) × 1 ............... Approx. 8 hours
÷ 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.
W :99 mm (3-7/8")
H :17 mm (11/16")
D :75 mm (2-15/16")
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)
Miniature phone jack
(E11-0381-05)

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Summary of Contents for Kenwood DMC-K3

  • Page 1: Specifications

    DC 1.2V : Specially provided rechargeable battery (NB-150) × 1 (Charging time : About 3 hours) 1. KENWOOD follows a policy of continuous advancements in development. For reason specifications may be changed without notice. Notes Notes 2.

  • Page 2: Table Of Contents

    DMC-K3 CONTENTS / ACCESSORIES Contents SPECIFICATIONS .........Top cover PC BOARD ..............9 CONTENTS / ACCESSORIES ........2 SCHEMATIC DIAGRAM ..........11 CONTROLS ..............3 EXPLODED VIEW .............15 DISASSEMBLY FOR REPAIR........4 PARTS LIST...............17 CIRCUIT DESCRIPTION ..........5 Accessories Batteries : NB150 (1) AC adapter (1) *...

  • Page 3: Controls

    DMC-K3 CONTROLS Main Unit HOLD indicator Disc Holder Play indicator HOLD Battery indicator ¢ (Skip up) key 6 (Play/pause) key Track number indicator 4 (Skip down) key Hand strap attaching hole DC IN jack (Extemal power jack) PHONES jack O P E N...

  • Page 4: Disassembly For Repair

    DMC-K3 DISASSEMBLY FOR REPAIR How to Remove Case 1. Remove 7 screws(1). 2. Slide the case to the opposite side of the battery case(2). How to Check PCB 3. Rmove 7 screws(3x5,4x2) and unsolder the corner of pcb(5). 4. Connect the ground wire to the LCD mounting hardware and the frame of the unit(6).

  • Page 5: Circuit Description

    DMC-K3 CIRCUIT DESCRIPTION 1. Main microprocessor : uPD784036GC831 (X33 : IC5) 1-1 Microprocessor periphery block diagram(X33) RE/SERVO CXA2523AR DSP/ATRAC CXD2655BR SERIAL XLAT XRST FOK SQSY SENS BEEP MIXER BASS BOOST BassBoost XSTBY BEEP IC12 SEIN MUTE SW u-COM HEAD PHONES AMP...
  • Page 6 DMC-K3 CIRCUIT DESCRIPTION Description Pin No. Name Function SYSTEM POWER port DSP IC (CXD2655BR) H: ON RF/SERVO IC (CXA2523AR) L: OFF Motor Driver/HP amp VCC2 power supply CHG1 Rechargeable circuit control signal H: RECHARGEABLE (SET UP POWER SUPPLY) L: NORMAL...

  • Page 7: Test Mode

    DMC-K3 CIRCUIT DESCRIPTION | | ,“ “ ) 2-1-2 Automatic FE Balance and FOCUS Bias 1-3 Voltage matrix key (u-COM pin Adjustment SET 6KEY PIN 56 KEY0 1) The FE balance setting value of the default starts a Port voltage [V] servo by the value which is memorized in E2PROM.
  • Page 8 DMC-K3 CIRCUIT DESCRIPTION 2) Frequency Response TON[ 3]: 40Hz sinewave,0dB,L&R,Emphasis off 3) Modulation Noise TON[ 6]: 20kHz sinewave,0dB,L&R,Emphasis off 4) Noise Ratio TON[ 7]: 40Hz Infinity Zero,- dB,L&R,Emphasis off 5) Channel Separation TON[ 8]: 1kHz sinewave,0dB,L,Emphasis off 6) Channel Separation...

  • Page 9: Pc Board

    PC BOARD(Component side view) PC BOARD(Foil side view) X33-1180-00 X33-1180-00 DC IN PHONES (J70-1290-02) (J70-1290-02) PHONES DC IN R108 R108 STOP STOP VOLUME C108 PLAY VOLUME VOLUME C108 PLAY VOLUME R104 C104 R104 C105 C101 C104 C105 R105 C101 R105 C119 C119 TEST1...
  • Page 10 (X33-1180-00) DMC-K3(S) DESTINATION UNIT No. COUNTRY ABB. JAPAN X33-1180-00 YES NO EUROPE X33-1182-71 NO YES U.K. +2.8V DMC-K3(L) DESTINATION 2.6V UNIT No. +2.5V 2.8V COUNTRY ABB. LID SW JAPAN X33-1180-00 YES NO 22u4 WAKE UP DMC-K3(BL) DESTINATION UNIT No. COUNTRY ABB.
  • Page 11 2.2V 2.7K 3.9K DC-DC DC-DC the product. CONVERTER CONVERTER (STEP DOWN) (1.2V) (STEP UP) 0.8V (0V) (BOTTOM VIEW) ON/OFF 2.8V 1.0V ON/OFF (1.3V) 6.7V (0.9V) 8.2K 2.0V (0.4V) DMC-K3 ( ) : BATTERY USE Y22-8020-00 DMC-K3(S)/(L)/(BL)
  • Page 12 DMC-K3 EXPLODED VIEW (MECHANISM) A ø1.7x3 : N09-3279-05 B ø1.7x1.8(BLK) : N09-3104-05 C ø1.4x3 (BLK) : N09-3488-05 D ø1.4x3 (BLK) : N19-3369-05 E WASHER : N19-1416-04 DMC-K3 MECHA Parts with exploded view numbers larger than 700 are not supplied.
  • Page 13 DMC-K3 EXPLODED VIEW (UNIT) (K type) (NB-150) DC IN PHONES OPEN HOLD VOLUME VOLUME A M1.4x2 : N09-3486-05 B M1.4x1.5 : N09-3487-05 C ø1.6x3(BLK) : N78-1730-45 D WASHER : N19-1416-04 DMC-K3 Parts with exploded view numbers larger than 700 are not supplied.
  • Page 14 Ref. No Parts No. Description Ref. No ress marks Parts nation marks Parts nation ress W09-1251-05 AC ADAPTER DMC-K3 W09-1267-05 BATTERY (NI-MH)NB-150 W01-0963-05 STEREO HEADPHONE(OPEN) A01-3662-03 METALLIC CABINET ASSY A01-3664-03 METALLIC CABINET ASSY E1T1 CONTROL (X33-1180-00) A01-3670-03 METALLIC CABINET ASSY...
  • Page 15 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 16 Les articles non mentionnes dans le Parts No. ne sont pas fournis. country. Numerals do the model. Teile ohne Parts No. werden nicht geliefert. Example: T1 shows DMC-K3 for U.K. market. "T" does all models for U.K. Add- Desti- Ref. No Parts No.

  • Page 17: Schematic Diagram

    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.