JVC MXJ-150-R Service manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-J150R
MX-J150R
STANDBY
CLOCK
COUNTER
ACTIVE
SOUND
BASS EX.
/TIMER
RESET
MODE
DEMO
PTY
DISPLA
– SELECT +
MODE
/EON
Y
TIMER
ON/OFF
SLEEP
SOUND
ACTIVE
PROGRAM
REPEAT
MODE
BASS EX.
/SET
TAPEA/B
CD
TUNING MODE FM MODE
TAPE
CD
FM/AM AUX
DISC SKIP
.
L
VO
+
F
ADE
MUTING
.
L
VO
–
RM–SMXJ100E
REMOTE CONTROL
PROGRAM/SET
PHONES
REPEAT
COMPU
PLAY
CONTROL
PLAY REC/PLAY
FULL-LOGIC CONTROL
AUX FM/AM
–
PLAY & EXCHANGER
CD TAPE
-
TUNING TUNING +
PRESET
CD SYNCHRO RECORDING
CD1CD2CD
+
OPEN / CLOSE
DISC CHANGE
3
COMPACT
DIGITAL AUDIO
VOLUME
+
–
CD REC
START
TAPE A/B
REC/PAUSE
A B
DUBBING
EJECTEJECT
COMPACT
DIGITAL AUDIO
SP-MXJ150R SP-MXJ150RCA-MXJ150R
Area Suffix
E
EN
EV
Continental Europe
Northern Europe
Eastern Europe
Contents
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-4
1-5
1-19
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-23
1-24
1-24
1-25
No.20858
Oct. 2000
MX-J150R
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 proper ty
damage resulting therefrom.
3. Many electrical and mechanical par ts 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 or iginal lead
routing and dress should be observed, and it should be confirmed that they have been returned
to normal, after re-assembling.
5. Leakage current 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, par ticularly any exposed metal part having a
return path to the chassis, and measure 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.
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.
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.
1-2
CAUTION
!
Important for laser products
MX-J150R
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.
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.
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 use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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.
REPRODUCTION OF LABELS
CLASSIFICATION LABEL, PLACED ON REAR ENCLOSURE WARNING LABEL, PLACED INSIDE THE UNIT
ADVARSEL: Usynlig laserstråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgå udsættelse for stråling (d)
CLASS 1
LASER PRODUCT
DANGER: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
VARNING: Osynlig laserstrålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle. Älä katso
säteeseen. (f)
1-3
MX-J150R
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 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
Attention when CD mechanism assembly is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD mechanism assembly.
CD changer unit
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.
1-4
Card wire
Pickup unit
connector
Soldering
Fig.2
Fig.1
CD changer
mechanism
Card wire
Pickup unit
connector
MX-J150R
Remove the three screws A on the back of the body
and the two screws B on both sides of the body.
Remove the top cover upward from behind.
Remove the two screws C attaching the side covers
on the back of the body and the six screws D on both
sides.
Slide the right and left covers backward and unhook
the two hooks a in the lower part of the side covers
as shown in Fig.2-2.
1.
2.
3.
4.
<Main body>
Removing the top cover & the side
covers (See Fig.1 to 3)
Disassembly method
Fig.1
Fig.2Fig.2-2
Fig.3
Top cover
A
A
A
C
C
Side cover (L)
Side cover (R)
Side cover (R)
B
D
D
D
Top cover
Hooks a
Top cover
Hooks a
B
D
D
D
Side cover (L)
Hook
Hook
1-5
MX-J150R
Removing the CD tray fitting
(See Fig.4 to 6)
Prior to performing the following procedure, remove
the top cover and the side covers.
ATTENTION:
1.
Press the POWER button. Press the OPEN/CLOSE
button to eject the CD tray.
2.
Move the CD tray fitting upward and release the joint
b.
3.
Press the OPEN/CLOSE button to insert the CD tray.
Be sure to remove the CD tray fitting
before removing the CD changer unit.
Removing the CD tray fitting
(See Fig.5 to 7)
CD tray
OPEN/CLOSE button
POWER button
Fig.4
Joint b
CD tray fitting
- How to eject the CD tray without turning on power -
1.
Turn the black loading pulley gear marked c from the
back of the CD changer unit as shown in Fig.7 and
draw the CD tray toward the front.
2.
Move the CD tray fitting upward and release the joint
b.
3.
Push and insert the CD tray manually.
Joint b
Fig.5
CD tray
Marked c
Loading pulley gear
1-6
Fig.7
Fig.6
MX-J150R
Prior to performing the following procedure, remove
the top cover, the side covers and the CD tray fitting.
Disconnect the card wire from connector SCW1 of
the CD servo board on the back of the CD changer
unit.
Disconnect the harness from connector FW2 on the
inner side of the main board in the body.
Remove the two screws E attaching the CD changer
unit on the back of the body.
Draw the CD changer unit upward from behind while
pulling the rear panel outward.
1.
2.
3.
4.
Removing the CD changer unit
(See Fig.8 to 10)
Fig.8
Fig.9
Fig.10
SCW1
CD servo board
CD changer unit
Main board
FW2
Rear panel
E
Rear panel
Front panel assembly
CD changer unit
1-7
MX-J150R
Removing the front panel assembly
(See Fig.11 to 13)
Prior to performing the following procedure, remove
the top cover, the side covers, the CD tray fitting and
the CD changer unit.
There is no need to remove the rear panel.
1.
Disconnect the harness from head wire connector
DW1 and DW2 on the inner side of the main board in
the body.
2.
Disconnect the harness from connector HCW1 of the
headphone board on the right side of the body.
3.
Remove the screw F and the two screws G attaching
the front panel assembly on both sides of the body.
Remove the screw V attaching the earth terminal
extending from the front compartment.
4.
Remove the screw H attaching the front panel
assembly on the bottom of the body.
5.
Release the two joints d on both sides and two joints
e on the bottom of the body using a screwdriver. At
the same time, disconnect the front compartment
from connector CCW1 and CCW2 of the main board.
Front panel assembly
Joint d
G
earth wire
Main board
CCW1
CCW2
DW2
DW1
V
Fig.11
Front panel assembly
F
Headphone board
HCW1
Joint e
Main board
Fig.12
H
Fig.13
G
Joint d
Joint e
1-8
MX-J150R
Prior to performing the following procedure, remove
the top cover, the side covers, the CD tray fitting and
the CD changer unit.
There is no need to remove the front panel
assembly.
Remove the seven screws I attaching the main
board and the tuner board to the rear panel on the
back of the body.
Remove the three screws J attaching the heat sink
to the rear panel on the back of the body.
Remove the three screws K attaching the rear panel
on the back of the body.
1.
2.
3.
Removing the rear panel (See Fig.14)
Prior to performing the following procedure, remove
the rear panel.
Disconnect the harness from connector HCW1 of the
headphone board on the right side of the body.
Release the harness from the clamp in the body.
Disconnect the harness from head wire connector
DW1 and DW2 extending to the main board in the
body.
Disconnect the harness from connector RCW1 of the
power transformer.
Remove the screw L attaching the earth terminal to
the base chassis.
Remove the screw F attaching the front panel
assembly.
Disconnect connector CCW1 and CCW2 connected
to the main board.
1.
2.
3.
4.
5.
6.
Removing the main board
(See Fig.15 and 16)
Fig.14
Fig.15
Fig.16
I
Rear panel
I
I
K
K
J
Front panel assembly
Main board
Headphone board
HCW1
Main board
Heat sink
Tuner board
DW2
DW1
CCW2
CCW1
Power transformer
RCW1
L
Clamp
F
1-9
MX-J150R
Removing the heat sink
(See Fig.17 and 18)
Prior to performing the following procedure, remove
the main board.
1.
Remove the three screws M attaching the heat sink
cover plate.
2.
Remove the two screws N attaching the power IC to
the heat sink and the three screws O attaching the
heat sink to the main board.
Removing the tuner board
(See Fig.18 to 20)
The tuner board can be removed even if the main
board is attached.
1.
Release the joint tab f of the tuner board holder and
the main board, and disconnect connector FW1
connected to the main board. Remove the tuner
board assembly (Refer to Fig.18).
2.
Remove the screw P attaching the tuner board
holder. Release the two tabs g outward and remove
the tuner board from the holder.
Removing the power transformer
(See Fig .21)
Prior to performing the following procedure, remove
the top cover and the side covers.
Heat sink cover plate
Tuner board
Heat sink cover plate
Heat sink
Fig.17
Joint tab f
O
Fig.18
M
N
FW1
Main board
Main board
1.
Disconnect the power cord from connector RCW2 of
the power transformer.
2.
Disconnect the harness from connector RCW1 of the
power transformer.
3.
Remove the four screws Q attaching the power
transformer and the screw R attaching the earth
terminal.
ATTENTION:
RCW1
Prior to disconnecting the power cord
from the body, remove the rear panel.
R
Q
Power transformer
Fig.21
Q
RCW2
Power cord
Tuner board
FW1
Tuner board holder
P
Fig.19
Tuner board
Fig.20
Tab g
Tab g
1-10
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