JVC MX-K30 Service Manual
MX-K30/MX-K10
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-K30/MX-K10
3-CD
PLAY & EXCHANGE
CD-R/RW PLAYBACK
SOUND
P
K
C
MODE
REPEAT
O
1 BIT
DUAL D/A
R
CONVERTER
PROGRAM
E
M
U
L
O
V
PANDOM
PRESET
TUNING
ACTIVE
BASS EX.
CLOCK
TAPE
/TIMER
A / B
O
P
C
L
A
C
I
S
S
P
I
K
S
C
S
I
D
3
D
C
2
D
C
1
D
C
CD1CD2CD
REPEAT
SOUND
MODE
ACTIVE
BASS EX.
COMPACT COMPONENT SYSTEM
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
3
CD
PROGRAM
/RANDOM
TAPE
TAPE
A/B
VOLUME
FADE
MUTING
MX-K30
STANDBY/ON
STANDBY
SET
CANCEL
/ DEMO
PHONES
REC START
/ STOPCD REC START DUBBING
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
CD1CD2CD
3
CD
PROGRAM
REPEAT
/RANDOM
TAPE
TAPE
A/B
SOUND
VOLUME
MODE
FADE
ACTIVE
MUTING
BASS EX.
Contents
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
CA-MXK30SP-MXK30 SP-MXK30
BASS-REFLEX BASS-REFLEX
COMPACT COMPONENT SYSTEM
STANDBY/ON
STANDBY
PHONES
1-2
1-3
1-4
1-5
1-18
PLAY & EXCHANGE
MX-K10
1 BIT
SET
CANCEL
/ DEMO
REC START
DUBBING
/ STOPCD REC START
CLOCK
/TIMER
CA-MXK10SP-MXK10
3-CD
CD-R/RW PLAYBACK
SOUND
P
K
O
C
MODE
REPEAT
P
O
DUAL D/A
R
CONVERTER
PROGRAM
C
L
A
C
I
S
S
E
M
U
L
O
V
PANDOM
PRESET
TUNING
TAPE
A / B
P
I
K
S
C
S
I
D
3
D
C
ACTIVE
2
D
C
BASS EX.
1
D
C
SP-MXK10
Flow of functional
operation until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Area Suffix
J U.S.A.
C Canada
1-20
1-21
1-21
1-22~28
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.21084
Oct. 2002
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 eachexposed 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
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
1-2
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.
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.
FUSE CAUTION
(S).
FUSE (S).
C UTI N :
CONTINUED PROTECTION
AGAINST FIRE HAZARD,
REPLACE ONLY WITH
SAME TYPE AND RATING
FUSE
C UTI N :
WITH SAME TYPE
TTENTI N :
REMPLACER PAR UN (LES) FUSIBLE (S)
DE MEME TYPE.
FOR
REPLACE
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
6.CAUTION : Use of controls, adjustments or performance of
to function.
procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
1-3
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 tester's 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.
CD changer
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
unit
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 CN601
on 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
CD changer
mechanism
assembly
1-4
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
Top cover
CD changer unit
Front panel assembly
Chassis unit
CD changer unit
Removing the main PCB
Removing the CD changer mechanism assembly
Removing the CD pickup
Replacing the loading motor and belt of the CD changer tray
Replacing the CD tray rotor belt of CD changer, and removing the motor
Front panel assembly
Removing the cassette deck mechanism
Removing the earphone jack PCB
Removing the control/FL PCB
Removing the switch PCB and ACTIVE BASS EX. switch PCB
Removing the cassette deck main motor, and replacing the main belts
Removing the leaf switches of the cassette deck mechanism
Removing the cassette deck heads
Chassis unit
Removing the 3-pin regulator
Removing the power amp and supply PCB and the Power Trans PCB
1-5
<Disassembly of the main blocks of this set>
Replacement of the fuses and the power IC
Replacing the fuses (See Fig.1)
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.
Fuse (F951)
1.6A 250V
Fuse (F951)
3.15A 250V
Fuse (F952)
1.6A 250V
FW 951
Fig.1(A)For MX-K10
Replacing the power IC (See Fig.2 to 3)
Prior to performing the following procedure, remove
the top cover.
1.
Remove the two screws "A" from the heat sink
between the power IC.
2.
Remove the solder fixing the power IC.
W
A
Fuse (F952)
1.6A 250V
FW 951
Fig.1(B)For MX-K30
W A
Fig.3For MX-K30
Replacing the heat sink cover
1. Remove the six screws "B" from the back panel.
2. Pull the heat sink cover outward.
1-6
Fig.2For MX-K10
B
Removing the top cover and two sides BOARD
(See Fig.5 and 6)
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 tw
3.
Remove the top cover from the body by lifting it
toward the rear.
o sides of the body.
Top cover
B
Front panel assembly
C
Front panel assembly
C
Fig.5
D
D
Fig.6
1-7
Removing the CD changer unit
(See Fig.7 to 10)
Prior to performing the following procedures,
remove the top cover and botn 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.
Push the CD tray deep into the set.
c.
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
Fig.7
CD changer
unit
Fig.10
CD tray panel
Fig.8
G
E
Accessory
terminal
F
Antenna
termianl
F
Fig.9
1-8
Removing the front panel assembly
(See Fig.11 and 12)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
1.
Disconnect the parallel wire and card wire from the
connectors CN702,CN701,CN101on the power amp
and supply PCB.
2.
Remove the two screws "H" retaining the front
panel assembly onto the bottom of the body.
Remove the screw "I" retaining the cassette dec k
3.
mechanism and then remove the GND lug "b" that
comes from the power amp and supply PCB.
Disengage the claws "c" on both sides at the
4.
bottom of the front panel assembly and then
remove the assembly.
H
Fig.11
Claw c
GND lug b
Power amp and
supply PCB
I
Fig.12
1-9
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