Kenwood DMCK 3 Service Manual

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DMC7K3(K) COVER1,1P( 99.10.2711:43 AM «Ks/2

PORTABLE MD PLAYER

DMC-K3

SERVICE MANUA

L

KENWOOD

© 1999-1/351-5503-00 (K/K) 2837

Lid assy
%, (ASS-212303)
® Escutcheon

Dressing panel
(A21 -3741 -o4)

Om

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GQO/WNEN

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BF

Kn
(K29-7476-03)

Knob

Knob
(K29-7475-03)

ob

(807-2443-01)

M-O

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DC jack
(E03-0357-05)

Miniature phone jack
(E11-0381-05)

@ MG (0)
(9

Knob

(K29-7477-O4)

(K29-7478-04)

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Battery cover MW]
(A09-1118-03)%

Mini disc digital audio system

. Noncontact optical reading system (semicon-
ductor laser)

44.1 kHZ

ATRAC (Adaptive Transform Acoustic Coding)

Sampling frequency .
Audio comprssion

Number of channels. 2 channels

Frequency rsponse. 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

Ratedpowe'omput. .9mW+9mW

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»150) x 1
(Charging time : About 3 hours)

m

Metallic cabinet assy
(A01 -3684-03)

Illustration is DMC-K3(S).

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SPECIFICATIONS

Battery life (Fully charge, with "PS on setting ON)

Specially provided rechargeable battery (NB-150)>< 1.
Commercially sold AA alkaline battery (LR-6)>< l
3 At 0.5mW+0.5mW output (32 52 load ).

0 Standard value during continuous use/charging in an temperature of

. Approx 7 hours
. Approx 8 hours

ZSBC.

0 Time of use may vary depending on battery maker, battery type, use

environment, and temperatute.

I Time will be shorter when PS oft 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")

Wa'ght (Net) ............ 115g (0.25 lb)

not including the accessory rechargeable batter
1409 (0.31 lb)
including the accessory rechargeable battery

1. KENWOOD follows a policy of continuous advancemenls in development. For reason specifications may be changed without notice.
t3 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.

KENWOOD-Corp. certifies this equipment conforms to DHHS
Regulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radlalion when open and Interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.

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DMC-K3

we

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
( N
AC adapter (1) Batteries : NB150 (1) Carrying case (1) Stereo headphone (1)
(W09-) (W09-1267-05) (W01 ~0938-05) (W01-0963-05)
Remotcon (1) Stereo headphone (1) *
(A70-1258-05) (W01-)
Refer to parts list on page 17.
k 1
Caution manning
, Symptom Cause Remedy
Bewale Of condensatlon Unit fails to oThe disc holder is not securely 0 Close disc holdersecurely.
mm on closed.
oThe battery is depleted. 0 Charge the battew.
When water vapor comes into contact with the surface of cold materir oHOLD status is engaged. o Deactivate HOLD status.
al, water drops are produced. There is no oThe volume is at minimum olncrease the volume.
If condensation occurs, correct operation may not be possible. or the sound. level.
.1 ma not function correctl oThe remote control or head- olnsert plug securely.
unI y _ y. _ _ phones are disconnected.
This is not a malfunction. however, and the unit should be dried. Theunitdos OIDLD status is engaged. oDeacbvate HOLD status.
(To do this, turn the POWER swttch ON and leave the unit as it is for not respond oThe battery is depleted. oCharge the battew.
several hours.) to keyopera- oThe remote control or head- olnsert plug securely.
tion. phone plug is not securely in-
_ _ serted.
Be especially careful in the followmg condittons: oThe disc holderis not securely 0 Close disc holdersecurely.
' When the unit is brought from a cold place to warm place. and there is CIOSEd-
a large temperature difference. Sormdsldps. oThe disc is scratched or dam- 0 Replace the M D.
. aged or the recording is not
- When a heater starts operating.
_ _ _ good.
- When the unit IS brought trom an alr'COIICIIIlOned place to a place 01 oThe unit is in a place where oMove the unit to a place
high temperature with high humidity. there is excessive vibration. where there is little vibra-
- When there is a large difference between the internaI temperature ol _ . tion orset to: P5 WI-
lhe unit and the ambient temperature, or in conditions where condenr flags 'Zfigygaggzggiéwwemal re- .Iajlftztngitseprfilfillafignge-
53110 occurs eaSIIY- oThe unit has become hot be- oWait until the unit has
cause of exposure to direct cooledtonomialtempera-
sunlight etc. ture.
oYou are using another AC oUse the accessory AC
adaptor than the accessory adaptor.
adaptor.
_ . oThe AC adaptors has become 0 Connect the AC adaptor
Miguemt disconnected. securely.
This system uses a microcomputer so it may malfunction due to external I I .
noise or interference. In such a case, unplug the power cord and remove the "gddsiay 9 _
batteries, then pIug the power cord again and insert the batteries again. M55599 Manrng Adm"
"noDlSC" oThere is no M D in the unit. 0 Insert a M D into the unit.
"BLANK " oNothing is recorded on this oReplace the disc with a
MD. prerecorded M D when
playing it back.
"ERROR u oThe *UTOC contents are oReplace the MD.
faulty.
oThe disc is scratched or dam- 0 Replace the M D.
aged, so playback is not pos-
sibIe.

*UTOC: A recordable MD has an area for recording so-called UTOC
(Users Table of Contents) data. The UTOC contains number
of tracks, playing time, written data, and other rewritable
information.

#

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DMC-K3

CIRCUIT DESCRIPTION

2) Frequency Response
TON[ 3]: 4OHZ 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,OdB,L,Emphasis off
6) Channel Separation
TON[ 10]: 1kHz sinewave,OdB,R,Emphasis off
7) Deemphasis
TON[ 13]: 16kHz sinewave,-9.04dB,L&R,Emphasis
on

2-2-1 Procedures

1) Connect #23(PJESTO) of I05 to 2.8V(VDD) and
#24(PfiTEST1) of that to GND. Next Connect AC
adapter to the unit.(the unit will be in CPLAY mode
after TOC reads)

Remocon [TEST 4]
Unit [04]

2) The unit will be in CPLAY after TOC reading.
Remocon [TOC OK]

Unit [04]

3) Choose and playback TNO-OZ on the disc by
PLAY/PAUSE key
Remocon [02] playback TNO
Unit [04]

4) Choose and playback every TNO in the above table
by PLAY/PAUSE key. TNO will be chosen TNO 02 if
repressing the PLAY/PAUSE key after STOP key
pressed.

Remocon [O3] playback TNO
Unit [04]

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