JVC MXK6 - Service Manual Immediate Download

SP-MXK5

CA-MXK5

PLAY & EXCHANGE

DISC CHANGE

SOUND

MODE

ACTIVE BASS

EX. LEVEL

CD-R

/RW PLAYBACK

COMPACT

DIGITAL AUDIO

COMPACT COMPONENT SYSTEM

MX-K5

CLOCK

/ TIMER

DISPLAY

PHONES

REPEAT

PROGRAM

REC START

/STOP

REC START

DUBBING

TAPE A

TUNING

SET

TAPE B

RANDOM

EJECT

PLAY

FULL - LOGIC CONTROL

EJECT

REC/PLAY

CD SYNCHRO RECORDING

CANCEL

/DEMO

PRESET

COMPU PLAY CONTR O L

ACTIVE BASS EXTENSION

STANDBY/ON

STANDBY

DISC SKIP

VOLUME

STANDBY/ON

+10

SLEEP

ACTIVE BASS

EX. LEVEL

SOUND

MODE

FM MODE

TAPE A/B

FADE

MUTING

FM/AM

AUX

TAPE

RMSMXK5A REMOTE CONTROL

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

No.20928

Mar. 2001

2001 VICTOR COMPANY OF JAPAN, LTD.

MX-K5 / MX-K6

MX-K5/MX-K6

Area Suffix

U.S.A.

Canada

Contents

Safety Precautions

Important for laser products

Preventing static electricity

Disassembly method

Wiring connection

Adjustment method

Flow of functional operating

until TOC read

Maintenance of laser pickup

Replacement of laser pickup

Trouble shooting

Description of major ICs

1-2

1-3

1-4

1-5

1-19

1-20

1-24

1-25

1-26

1-29

MX-K5

MX-K6

CA-MXK5

CA-MXK6

SP-MXK5

SP-MXK6

MX-K5

MX-K6

Each difference points

CD/DECK/

RECEIVER

Speaker

Color

POWER / SUB / CD EJECT /

DISK CHANGER bottom

SILVER

METALLIC LIGHT GRAY

VOLUME RING

ornament

CD fitting

MODEL

MC-Service

MX-K5/MX-K6

1-2

Safety Precautions

1. This design of this product contains special hardware and many circuits and components specially

for safety purposes.

For continued protection, no changes should be made to the original design

unless authorized in writing by the manufacturer.

Replacement parts must be identical to those

used in the original circuits.

Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made.

Any design alterations of

the product should not be made.

Any design alterations or additions will

void the manufacturer`s

warranty and will further relieve the manufacture of responsibility for personal injury or property

damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics.

These characteristics are often not evident from visual inspection nor can the protection afforded

by them necessarily be obtained by using replacement components rated for higher voltage,

wattage, etc.

Replacement parts which have these special safety characteristics are identified in

the Parts List of Service Manual.

Electrical components having such features are identified by

shading on the schematics and by (

) on the Parts List in the Service Manual.

The use of a

substitute replacement which does not have the same safety characteristics as the recommended

replacement parts shown in the Parts List of Service Manual may create shock, fire, or other

hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the

like to be separated from live parts, high temperature parts, moving parts and/or sharp edges

for the prevention of electric shock and fire hazard.

When service is required, the original lead

routing and dress should be observed, and it should be confirmed that they have been returned

to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal parts

of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control

shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet.

Using a "Leakage Current Tester", measure

the leakage

current from each exposed metal parts of the cabinet , particularly any exposed

metal part having a return path to the chassis, to a known good earth ground. Any leakage

current must not exceed 0.5mA AC (r.m.s.)

Alternate check method

Plug the AC line cord directly into the AC outlet.

Use an AC voltmeter having, 1,000 ohms

per volt or more sensitivity in the following manner. Connect a 1,500

10W resistor paralleled by

a 0.15 F AC-type capacitor between an exposed

metal part and a known good earth ground.

Measure the AC voltage across the resistor with the

AC voltmeter.

Move the

resistor

connection

to each exposed

metal part, particularly any exposed metal part

having a return path to the chassis, and meausre

the AC voltage across the resistor. Now, reverse

the plug in the AC outlet and repeat each

measurement. voltage measured any must

not

exceed 0.75 V AC (r.m.s.). This corresponds to 0.5

mA AC (r.m.s.).

Warning

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Good earth ground

Place this

probe on

each exposed

metal part.

AC VOLTMETER

(Having 1000

ohms/volts,

or more sensitivity)

1500

10W

0.15 F AC TYPE

! CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

MX-K5/MX-K6

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible

laserradiation and is equipped with safety switches

whichprevent emission of radiation when the drawer is

open and the safety interlocks have failed or are de

feated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in

hazardous radiation exposure.

REPRODUCTION AND

POSITION OF LABELS

FUSE CAUTION

WARNING LABEL

FUSE CAUTION LABEL

! CAUTION Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

Power transformer

Bottom shassis

MC-Service

MX-K5/MX-K6

1-4

Preventing static electricity

1. Grounding to prevent damage by static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,

can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

2. About the earth processing for the destruction prevention by static electricity

In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of

the work environment.

Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over

it before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the

replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power

source can easily destroy the laser diode.

4. Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific

details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse

unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Attention when CD mechanism assembly is decomposed

1. Remove the CD changer unit.

2. Remove the CD changer mechanism.

3. Solder is put up before the card wire is removed from the pickup unit

connector on the CD mechanism assembly.

(When the card wire is removed without putting up solder, the CD pick-up

assembly might destroy.)

4. Please remove solder after connecting the card wire with the pickup unit

connector when you install picking up in the substrate.

*Please refer to "Disassembly method" in the text for pick-up and how to

detach the CD mechanism assembly.

Soldering

Fig.1

Fig.2

Card wire

Picup unit

connector

Picup unit

connector

CD changer unit

CD changer

mechanism

MX-K5/MX-K6

Remove the three screws A

attaching the metal

cover on the back of the body.

Remove the six screws B attaching the metal cover

on both sides of the body.

Remove the metal cover from the body by lifting the

rear part of the cover.

Disassembly method

Removing the metal cover

(See Fig.1 to 3)

Do not break the front panel tab fitted

to the metal cover.

ATTENTION:

Fig.1

Fig.2

Fig.3

Metal cover