Kenwood DMCJ 3 Service Manual

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DMCeJ3(K)1Pi98.4.2519:57 y [w 2 if

DMC-J3 KENWOOD

SERVICE MANUAL

©1998-3/851-5411-00 (K/K) 3163

Knob
(K29-)

Knob Dressing panel Frontglass Lid assy Dressing panel DCjack
(K29-) (Azi-i (810-2407-04) (A53-) (A21-) (EO3-0357-05)
I:
f

o
E

\"y
.0 one
W

\ /

l
l

KEN ' OOD -
x\ Miniature phone jack Knob Knob Battery cover @
(E11-0381-05) (K29-6827-03) (K29-l (A09-l
Knob !_-LI\(I m Blind plate
(K294582803) l e \V WD'ogW/O I V U VJ (F19-1086-04)

* Refer to parts list on page 17.

SPECIFICATIONS

System ....... Mini disc digital audio system Battery life (Fully charge, with "auto PS"setting ON)
Read method . Noncontact optical reading system Specially provided rechargeable battery (NBrtBO)Xl
(semiconductor laser) - -- Approx- 5 hours

Sampling frequency 44.1 kHz Commercially sold AA alkaline battery (LRrslxt
Audio compression. ATFlACIAdaptive Transform Acoustic Cording) "
Number ot channels ...... 2 channels

Approx. 6 hours

I At 0.5mW+O.5mW output (329 load).
Frequency response 20 Hz to 20,000 Hz (1 3 dB) I Standard value during continuous use/charging in an temperature of
Wow & tlutter Less than immeasurable limit 25 C'
(10001 % W.PEAK) I Time of use may vary depending on battery maker, battery
type. use environmentand temperatute.
I Time Will be shorter when "PSoft" Mode is set.

Dimensions (not including protruding parts)

w :99 mm (377/8")

H :i7 mm (it/16")

Input/Output terminal .. Flemote control/Phones jack
Rated power output 9 mW+9 mW
Power source

DO IN lack (475w)

:Speciallyprovided AC adaptor D :75 mm (2*15/16)
: Car battery adaptor (sold separately. DCVC7O) Weight (Net) IIIIIIIIIIIIIIII 1159 (0.25 lb)
DC 1.5V : Commercially sold AA alkaline battery (LFlrslxt not including the accessory rechargeablebatter
DC 1.2V :Speciallyprovided rechargeable battery (NB7130)X l 1409 (031 lb)
(Chargingtime : 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.
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- KENWOOD-Corp certifies this equipment conforms to DHHS
tions of labels on, or inside the product relating to laser product Regulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.
safety.

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

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DMCPJ3lK)lP(98t4t2519:57 y [W 3

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CONTENTS / ACCESSORIES

Contents

SPECIFICATIONS ............... Top cover PC BOARD ....................
CONTENTS / ACCESSORIES . 2 SCHEMATIC DIAGRAM
CONTROLS. 3 EXPLODED VIEW

CIRCUIT DESCRIPTION.

Accessories

4 PARTS LIST

f

AC adapter (1) *
(wos-l

AC plug adapter (1)
(E03-0115-05)

Remocon (1 )
(A70-1186-05)

Batteries : NB130 (1)
(wos-1237-05)

Stereo headphone (1)

(W01-)

* Refer to parts list on page 17.

Carrying case (1)
(W01 -0938-05)

\ )
Caution Troubleshooting
. Symptom Cause Remedy
Beware Of car'densaflon Unit tails to .Thedischolderlsnotsecurelyclosed. colosedlscholdersecurely.
_ _ _ "" °- .The oaitery rsdepleted. rehargethe hattery,

When water vapor comes into Contact With the surface 01 cold materls . HOLD status 5 engaged . Deactlvale HOLD status

al, W316i drops 36 Pmduced- There is rm .Thevolurrle is at mllllmllm level. rlricrease the volume.

If condensatlorl occurs, correct operation may not be posslble, or the sound_

unit may not function correctly.

This ls not a malfunction, however, and the unit should be dried.

(To do this, turn the POWER SWltch ON and leave the unit as it is for
several hours.)

Be especially careful in the followtng conditions:

- When the unit ls brought from a cold place to warm place. and there is
a large temperature difference.

- When a heater starts operating.

- When the uni1 is brought from an airrcondlticned place to a place of
high temperature with hlgh humidi1y.

- When there Is a large difference between the internal temperature of
the unit and the ambient temperature, or in condillorls where condens
satlon occurs easily.

Resetting the unil

. The remote control or headphones are
dlsconllecled

.lnsert plug securely.

The unit does
not respond to
key operation.

. HOLD status is engaged.

. The hattery ls depleted.

.The remote control or headphone plug is
not securely inserted.

. The disc holder is not securely closed.

I Deacllvale HOLD status.
0 Charge the hattery.
. lnsert plug securely

. Close disc holder securely.

Sound skips.

- The MD disc has. a scratch or apoor recording
.The urllt is in aplacewhere there ls

excesslve Vlblatlun

r Replacetlle MD

Move the llrllt to aplace
where there is Iltlle yioratlon,
or set to "PS 0"" .

Buttery does
not charge.

. Vou are using commelclal rechargeable oattery

. The unit has become hot oecause ol
exposure to dllecl suhllght etc

. You are uslng another Ac adaptor than
the accessory adaptor

r The AC adaptors has oecorrre dlscollllecled

r use the speolal rechargeaole
hattery (NE-130)

.Wart until the unit has cooled
to normal temperature.

. Use the accessory AC adaptor

nConrlecl the AC adaptor securely.

The will may not operate normally due to iaulty handling or adverse power current
ellects caused by impact, excessive static eleclrlclty load, or power drop durlng use.

It this occurs,take the following measures.
OPull the AC adaptor out oi the
power outlet.
9Remove the rechargeable
battery.
OWait about 30 seconds.
GPlug the AC adaptor into the
power outletand operate the
unit.

To household outlet

Meaning of display messages

dullng charging.

Message Meaning Action
" n o DI 5c " c There IS no MD in the unit. . lnsert a MD into the unlt
.r B L A N K .r . Nothing is recorded on lhls MD . Replacetlle disc wrth aprerecorded
Mtherl playing l1 oach.

" E R R o R " r The ' uroc contents are laulty. r Replacelhe MD

.Thedrsc ls scratched or damaged so r Replacelhe MD

Playbackls not possrole

"LoBATT " c The inside ol the unlt hasoecorrre hot - Waltumlllhe lllsmenllne unll

cools down

uToc UToc (users Taole ot Contents) relers to speclal data put on a reoordaole MD,
other than TOC data. UToc contains wntaole data such as number or songs,
perlormance time. and other written data,

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CIRCUIT DESCRIPTION

2) To change setting value is available +2 or -2 steps by
VOL UP/DOWN key. Disc stops to turn after memoriz-
ing the value to E2PROM by PLAY/PAUSE key or not
memorizing it to E2PROM by STOP key. Display
shows setting value+80h.

[74 127] changed value
[TEST 1] the stop key is pressed

Remote cont

Unit [01] changed value
[00] the stop key is pressed

3-1-4 Automatic Adiustment results in Stop Mode After
Adjustment
" Result will be shown cyclically by SHIT key as follows. Left
2 figures shows display contents number.
Example is in remote controller.
1) TOC reading address
Remote cont [01FFDO] right 4 figures: header
adds/cluster only

2) FOCUS BIAS Value Setting
[077272] mid 2 figures: high reflec-
tion bias value
right 2 figures: low reflec-
K tion bias value

3) High reflection EF Balance
[08 10] right 2 figures: value
4) Low reflection Pit lGroove of FE Balance
[090FOF] mid 2 figures: pits FE-
balance
right 2 figures: grooves
FE balance

5) High reflection Auto Gain Filter of Focus and Tracking
[103F40] mid 2 figures: focus gain
value
right 2 figures: tracking
gain value

6) Low reflection Auto Gain Filter of Focus and Track
[113538] mid 2 figures: focus gain
right 2 figures: tracking
gain

10

7) Average data of VC/FE Offset
[127F7F] mid 2 figures: VC offset
compensation value+80h
right 2 figures: FE offset
compensation value+80h

8) Average Data of ABCD Offset
[13 41] right 2 figures: FE offset
compensation value

3-2 TEST MODE |I (AUDIO SPEC)
Item of audio specification

3-2-1 Procedures
1) Connect #43(TESTO) of ICS to 2.8V(VDD) and
#42(TEST1) 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-02 on the disc by
PLAY/PAUSE key
Remocon [O2] 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 [O5] playback TNO
Unit [04]