JVC MX-K10 Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-K10

MX-K10

BASS-REFLEX BASS-REFLEX

COMPACT COMPONENT SYSTEM

STANDBY/ON

STANDBY

FM

AUX

/ AM

PHONES

REC START
/ STOPCD REC START

MIC

MIC LEVEL

COMP U P L AY CONT R O L

MIN MAX

EJEC T EJEC T

PLAY

A

CD1CD2CD

REPEAT

SOUND
MODE

ACTIVE

BASS EX.

STANDBY/ON

SLEEP

AUX

FM MODE

FM /AM

3

CD

PROGRAM
/RANDOM

TAPE

TAPE

A/B

VOLUME

KARAOKE

FADE

MUTING

ECHO

CA-MXK10SP-MXK10 SP-MXK10

Contents

Safety precautions --------------------------- 1- 2
Important for laser products ---------------- 1- 3
Preventing static electricity -----------------1- 4
Disassembly method ------------------------1- 5
Adjustment method --------------------------- 1-18

MX-K10

CANCEL

/ DEMO

CD

TAPE

DUBBING

FUL L - L OG I C CO N T R O L

3-CD

PLAY & EXCHANGE

CD-R/RW PLAYBACK

SOUND

P

K

O

C

MODE

REPEAT

P

O

1 BIT

DUAL D/A

R

CONVERTER

PROGRAM

C

L

A

C

I

S

S

E

M

U

L

O

V

PANDOM

SET

PRESET

TUNING

CLOCK

TAPE

/TIMER

A / B

CD S Y N C H R O R E C O R D IN G

P

I
K
S

C
S
I
D

3

D
C

ACTIVE

2

D

C

BASS EX.

1

D

C

REC / P L AY

B

Area Suffix

UT ........................ TAIWAN

Flow of functional
operation until TOC read -------------- 1- 20
Maintenance of laser pickup -------------- 1- 21
Replacement of laser pickup -------------- 1- 21
Description of major ICs ------------------- 1- 22

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

No. 21173

May. 2003

MX-K10

Safety Precautions

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

l

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.)

l

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 AC­type 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.).

0.15 F AC TYPE

1500 10W

AC VOLTMETER
(Having 1000
ohms/v
or more sensitivity)

olts,

Place this
probe on
each exposed
metal part.

Good earth ground

!

CAUTION

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.

Bur rs f orm ed d uri ng m old ing
may be left ove r on some parts
of the chassis. There fore, pay
at tention to such bur rs in the
case of pr ef orming repai r of
this system.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams,
the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified
by the " ! " mark nearby are critical for safety.
When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.
(Except the J and C version)

1-2

Important for laser products

MX-K10

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
laser radiation and is equipped with safety switches
which prevent emission of radiation when the drawer is
open and the safe ty int erlocks hav e fail ed or are
defeated. It is dangerous to defeat the safety switches.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle. Älä
katso säteeseen.

REPRODUCTION AND POSITION OF LABELS

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.

!

CAUTION Please us e enough caution no t

to see the beam directly or touch
i t in case of a n ad j u s tment or
operation check.

ADV ARS E L : Usy nlig laserstr åli ng v ed å bni ng, nå r

sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling.

ADV ARS E L : Usy nlig laserstr åli ng v ed å pni ng, nå r

sik ker hets bry teren e r avs lot t. U nngå
utsettelse for stråling.

WARNING LABEL

1-3

MX-K10

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.

(caption)
Anti-static wrist strap

Conductive material
(conductive sheet) or iron plate

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 testers internal power
source can easily destroy the laser diode.

4. Handling the CD changer unit (optical pickup)

1. Do not subject the CD changer 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 CD changer
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

CD changer

unit

CD changer

mechanism

assembly

subjected to strong force.

4. It is no t possible to adju st the semi-fix ed resistor that
adjusts the laser power. Do not turn it.

Attention when traverse unit is decomposed

Please refer to “Disassembly method ” in the text for

*

pick up and how to detach the CD changer mechanism.

1. Remove the CD changer unit.

2. Disconnect the harness from connector on the CD motor
board.

3. Solder is put up before the card wire is removed from connector
Cn601on the main board as shown in Fig.1 and Fig. 2.
(When the wire is removed without putting up solder, the
CD pick-up assembly might destroy.)

4. Please remove solder after connecting the card wire with
CN601 when you install picking up in the substrate.

Flexible cable

Soldering

Fig.2

Fig.1

1-4

MX-K10

Disassembly method

Commence disassembly of this set by removing the main units and then proceed to the components
and assemblies inside the units.

Replacement of the fuses and the power IC

n Top cover

n CD changer unit

n Front panel assembly

n Chassis unit

n CD changer unit

n Removing the main PCB
n Removing the CD changer mechanism assembly
n Removing the CD pickup
n Replacing the loading motor and belt of the CD changer tray
n Replacing the CD tray rotor belt of CD changer, and removing the motor

n Front panel assembly

n Removing the cassette deck mechanism
n Removing the earphone jack PCB
n Removing the control/FL PCB
n Removing the switch PCB and ACTIVE BASS EX. switch PCB
n Removing the cassette deck main motor, and replacing the main belts
n Removing the leaf switches of the cassette deck mechanism
n Removing the cassette deck heads

n Chassis unit

n Removing the 3-pin regulator
n Removing the power amp and supply PCB and the Power Trans PCB
n Removing the sub power PCB

1-5

MX-K10

<Disassembly of the main blocks of this set>

Replacement of the fuses and the power IC

n

Replacing the fuses (See Fig.1)

n

Prior to performing the following procedure, remove

the left side BOARD.

1. Replace the fuses inside.

[Caution] Be sure to use fuses with the specified

ratings.

n Replacing the power IC (See Fig.2)

n

Prior to performing the following procedure, remove
the top cover.

1. Remove the two screws "A" from the heat sinkbetween
the power IC.

2. Remove the solder fixing the power IC.

Fuse(F953)
T1AL 250V

Bottom side Fig.1(A)

Hole

Hole For
Check Fuse
Condition

Component side Fig.1(B)

CAUTION

(don't remove
the safety sheet
cover)

Fuse(F951)
T1.6AL 250V

W A

Fuse(F952)
T1.6AL 250V

FW951

Fig.2

1-6

Fuse(F952)
T1.6AL 250V

Fuse(F951)
T1.6AL 250V

Fuse(F953)
T1AL 250V

n Removing the top cover and two sides

BOARD (See Fig.3 and 5)

1. Remove the six screws "C" that retain the top cover

from the rear of the body.

2. Remove the eight screws "C" and "D" that retain

the top from the two sides of the body.

3. Remove the top cover from the body by lifting it
toward the rear.

MX-K10

Top cover

C

B

Fig.3

Front panel assembly

C

Front panel assembly

Fig.4

D

D

Fig.5

1-7

MX-K10

n Removing the CD changer unit

(See Fig.6 to 9)

n

Prior to performing the following procedures, remove

the top cover and both sides BOARD.

[Caution] Although the CD mechanism unit can be

removed without removing the CD tray
panel, it is still recommended to remove it
in order to prevent damage.

a.From the front panel side of this set, push in the

sections marked with arrows and pull out the CD
tray toward the front.

b.Remove the CD tray panel by pushing both of its

extremities upward in the direction of the arrows.

c.Push the CD tray deep into the set.

CD tray panel

1.Disconnect the card wires from the CD PCB CN703
and CN203.

2.From the rear of the set, remove the two screws "E"
and two serews "G" on the front panel left and right
side.

3.Handle the CD changer unit rear, take out unit.

CD tray panel

Accessory
terminal

Fig.7

E

F

Antenna
termianl

F

Fig.8

1-8

Fig.6

CD changer
unit

G

Fig.9

n Removing the front panel assembly

(See Fig.10 to 11)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

1.Disconnect the parallel wire and card wire from the
connectors CN702, CN701, CN101 on the power
amp and supply PCB.

2. Remove the two screws "H" retaining the front
panel assembly onto the bottom of the body.

3. Remove the screw "I" retaining the cassette deck
mechanism and then remove then GND lug "b" that
comes from the power amp and supply PCB.

4. Disengage the claws "c" on both sides at the
bottom of the front panel assembly and then
remove the assembly.

MX-K10

Claw c

H

Fig.10

er amp andPow

supply PCB

GND lug b

I

Fig.11

1-9

MX-K10

<Disassembly of units and assembly
inside this set>

n Removing the CD PCB

(See Fig.12 to 13)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

1. Disconnect the wires from CN603A, CN603B and
CN604 on the CD PCB, which is located on the
back side of the CD changer unit.

2. The two screws "J" that retain the CD PCB
should be removed.

3. Remove the CD PCB by pulling it toward the side
where the CN601 is located.

4.Using solder, short the CD pickup to connect to
short round.

CD PCB

J

[Caution] After re-connecting the wires, be sure to

remove the shorting solder from the GND
connection.

5. Disconnect the card wire from the connector CN601
on the main PCB and then remove the main PCB.

Fig.12

CD PCB

CN601

1-10

Short round

Fig.13