SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-G500R
STANDBY/ON
SLEEP
AUX
DISPLAY
M
FM/AM
O
DE
CD
RMÐSMXG500R R EMOT
12
456
78
10
PTY/EON
T
APE
VOL
VOL
MX-G500R
Area suffix
B ------------------------ U.K.
E ---- Continental Europe
EN ----- Northern Europe
EV ------- Eastern Europe
STANDB
Y
ECO
STANDBY/ON
3
CD
MX-G
500R
3
SUBWOOFER
L
EVE
L
O
UND
S
O
DE
M
9
FM MODE
+10
Ð SELECT +
FADE
T
APE A/B
MUTIN
G
DISC
SKIP
+
UME
UME
Ð
E CONTROL
SP-MXG500 SP-MXG500
EXTENDED SUP ER BASS
FM
CD
AUX
/ AM
PROGRAMRANDO
M
EPEAT
R
PHONES
REC STAR
T
C
D REC
DUBBING
/STO
P
START
FULL - LOGIC CONTROL
CA-MXG500R
DISPLAY
T
APE
TAPE BTAPE
A
Ð
DISPLA
Y MOD
E
SELECT +
PTY/EO
N
CD SYNCHRO RECORDIN
DISC CHANGE
2
3
1
D
D
D
C
C
C
CD-R/RW PLAYBACK
SOUND
M
ODE
CLOCK
/TIMER
SUBWOOFER
LEVEL
G
Contents
Safety Precautions
Important for laser produbts
Preventing static electricity
Disassembly method
Wiring connection
Adjustment method
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-4
1-5
1-6
1-19
1-20
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Trouble shooting
Description of major ICs
1-24
1-25
1-25
1-26
1-29~42
No.21098
Apr. 2002
MX-G500R
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 circuitr y 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.).
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. 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 m ust 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 v oltage.
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.
In regard with component parts appearing on the silk-screen pr inted 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.
(This regulation does not correspond to J and C version.)
1-2
MX-G500R
(U.K only)
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.
2. Any unauthorised design alterations or additions will void the manufacturer's guarantee ; further more the
manufacturer cannot accept responsibility f or personal injury or property damage resulting therefrom.
3. Essential safety critical components are identified by ( ) on the Parts List and by shading on the
schematics, and must never be replaced by parts other than those listed in the manual. Please note
however that many electrical and mechanical parts in the product have special safety related
characteristics. These characteristics are often not evident from visual inspection. Parts other than
specified by the manufacturer may not have the same safety characteristics as the recommended
replacement parts shown in the Parts List of the Service Manual and 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.
1. Service should be performed by qualified personnel only.
2. This equipment has been designed and manufactured to meet international safety standards.
3. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
4. Repairs must be made in accordance with the relevant safety standards.
5. It is essential that safety critical components are replaced by approved parts.
6. 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.
1-3
MX-G500R
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
CAUTION
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
WARNING LABEL
1-4
MX-G500R
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.
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.
Card wire
Picup unit
connector
Soldering
Fig.2
CD changer unit
Fig.1
Card wire
Picup unit
connector
CD changer
mechanism
1-5
MX-G500R
Disassembly method
Removing the metal cover (See Fig.1)
1.
Remove the three screws A attaching the metal
cover on the back of the body.
2.
Remove the six screws B attaching the metal cover
on the both sides of the body.
3.
Remove the metal cover from the body by lifting the
rear part of the cover.
ONE POINT
How to eject the CD tray (see fig.2)
Although it will end if the OPEN/CLOSE
button is pushed when a power supply can
be taken, when that is not right, CD tray will
be opened manually.
Turn the loading pulley gear at the bottom of
the CD changer unit as shown in Fig.2 and
draw the CD tray toward the front.
Metal cover
A
B
(both sides)
Fig.1
Loading pulley gear
(See <CD changer unit>fig.1)
Removing the CD Tray fitting
(See Fig. 3)
Prior to performing the following procedure, eject the
CD tray.
After drawing the lower part of the tray fitting toward
1.
the front, remove the five claws. Then, while moving
the tray fitting upward, remove it.
Removing the CD changer unit
(See Fig.4 to 7)
Prior to performing the following procedure, remove
the metal cover and CD tray fitting.
1.
Remove the card wire attached to CD changer unit
on the adhesion tape.
2.
Disconnect the card wire from the connector CW105
on the CD servo board.
3.
Disconnect the harness from the connector RCW6
on the main board and CW107 on the CD servo
board.
4.
Remove the two screws C attaching the CD changer
unit to the rear panel.
Fig.2
Joint
CD tray fitting
Claw
Fig.3
Card wire
CD changer unit
5.
Remove the two screws D attaching the CD changer
unit to the both sides of front panel assembly.
6.
Draw the CD changer unit upward from behind while
pulling the rear panel outward.
1-6
Adhesion tape
Fig.4
MX-G500R
CW105
CW107
Fig.5
CD servo board
CD changer unit
Main board
RCW6
Front panel
assembly
D
(both sides)
C
Rear panel
Fig.6
CD changer unit
Rear panel
Fig.7
Removing the front panel assembly
(See Fig.8 to 10)
Prior to performing the following procedure, remove
the metal cover and CD changer unit.
1.
Disconnect the card wire from the connector FCW3
on the main board.
2.
Disconnect the harness from the connector JCW1,
JCW2 and HCW3 on the main board.
3.
Remove the screw E attaching the earth terminal
extending from the cassette mechanism assembly.
4.
Remove the two screws F attaching the front panel
assembly to both sides of the body.
5.
Remove the screw G attaching the main board to the
front panel assembly.
6.
Remove the screw H attaching the front panel
assembly to the bottom of the body.
7.
Release the two joints1 and two joints2, and detach
the front panel assembly toward the front.
Front panel
assembly
Joint1
(both sides)
(both sides)
F
FCW3
JCW2
Fig.8
Main board
JCW1
HCW3
E
(fixing the earth wire)
Main board
ACW1
ACW2
Amp. board
Front panel
assembly
G
Fig.9
Joint1
(both sides)
F
(both sides)
1-7
MX-G500R
Removing the heat sink & amp. board
(See Fig.8, 11 and 12)
Prior to performing the following procedure, remove
the metal cover and the CD changer unit.
1.
Disconnect the card wire from the connector ACW1
and the harness from the connector ACW2 on the
amp. board.
2.
Remove the four screws I attaching the heat sink
cover to the rear panel. Remove the heat sink cover.
3.
Remove the four screws J attaching the heat sink
and two screws K attaching the speaker terminal to
the rear panel.
4.
After moving the heat sink upward, remove the
claws. Then pull out the heat sink & amp. board
inward.
H
Heat sink
cover
Joint2
Fig.10
(Bottom side)
Rear panel
I
I
Removing the tuner board
(See Fig.12 and 13)
Prior to performing the following procedure, remove
the metal cover.
1.
Disconnect the card wire from the connector CON01
on the tuner board.
2.
Remove the two screws L attaching the tuner board
to the rear panel.
Removing the eco board
(See Fig.12 and 13)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1.
Disconnect the power cord from the connector PJ2
on the eco board.
2.
Disconnect the harness from the connector PJ3 and
RCW5 on the eco baord.
3.
Remove the two screws M attaching the eco board
to the rear panel.
J
Heat sink
J
O
Rear panel
Tuner board
Fig.11
Rear panel
L
N
K
Speaker
terminal
M
Fig.12
Eco board
Removing the rear panel (See Fig.12)
Prior to performing the following procedure, remove
the metal cover, CD changer unit, heat sink & amp.
board and tuner board.
1.
Remove the two screws N and three screws O
attaching the rear panel.
1-8
RCW5
PJ2
PJ3
Main board
CON01
Fig.13
MX-G500R
Removing the main board (See Fig. 14)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1.
Disconnect the card wire from the connector FCW3
and the harness from the connector JCW1, JCW2
and HCW3 on the main board.
2.
Disconnect the harness from the connector PCW1
on the fuse board.
3.
Remove the screw G attaching the main board
holder to the front panel assembly. (See Fig.9)
4.
Remove the two screws P attaching the heat sink to
the bottom chassis.
Removing the power cord (See Fig. 14)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1.
Disconnect the power cord from the connector PJ2
on the eco board (see fig.13) and pull up the power
cord stopper upward.
Fuse board
PCW1
Power supply
board
RCW1
Power cord
Power cord
stopper
Bottom chassis
Fig.14
Q
FCW3
JCW2
JCW1
Main board
HCW3
Heat sink
P
Heat sink
Removing the power ICs
(See Fig.15 and 16)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1.
Remove the four screws Q attaching the power ICs
to the heat sink.
2.
Unsolder the power ICs solder point.
Removing the power transformer
(See Fig .17)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1.
Disconnect the harness from the connector RCW1 on
the power supply board.
2.
Disconnect the harness from the connector PCW1 on
the fuse board.
Power ICs solder point
Bottom chassis
R
Amp. board
Fig.15
Heat sink
Amp. board
(reverse side)
Fig.16
Power transformer
PCW1
Fuse board
Power supply
board
RCW1
3.
Remove the four screws R attaching the power
transformer to the bottom chassis.
Fig.17
1-9
MX-G500R
)
)
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the CD changer unit and the front
panel assembly.
Removing the power / CD switch board
(See Fig.1)
1.
Disconnect the card wire from the connector UCW1
on the power / CD switch board.
2.
Remove the five screws A attaching the power / CD
switch board.
Removing the FL display & system control
board (See Fig.1)
1.
Disconnect the card wire from the connector UCW3,
UCW4, UCW5 and UCW6 on the FL display & system
control board.
2.
Remove the six screws B attaching the FL display &
system control board.
3.
Disconnect the card wire from the connector UCW2
on the FL display & system control board.
B
UCW2
UCW3
B
UCW4
Front panel assembly (inner side
A
Power / CD switch board
Fig.1
Sound mode knob
Volume knob
FL diplay &
system control
board
UCW1
UCW5
UCW6
Removing the headphone jack board
(See Fig.3)
Prior to performing the following procedure remove
the FL display & system control board.
1.
You can pull out the headphone jack board.
Removing the front key switch board
(See Fig.2 and 3)
Prior to performing the following procedure, remove
the FL display & system control board.
1.
Pull out the sound mode knob, volume knob and
subwoofer level knob from front side.
2.
Remove the twelve screws C attaching the front key
switch board.
3.
Remove the front board releasing the two tabs.
4.
Disconnect the card wire from the connector UCW7
on the front key switch baord, if needed.
Removing the cassette mechanism
assembly (See Fig.3)
UCW7
Tab
Tab
Mecha.
board
C
C
D
Subwoofer level knob
Fig.2
Front panel assembly (inner side
Front key switch board
Headphone
jack board
D
1.
Disconnect the card wire from the connector on the
mecha. board.
2.
Remove the six screws D attaching the cassette
mechanism assembly.
1-10
D
(fixing the earth wire)
Connector
Cassette mechanism
assembly
Fig.3
MX-G500R
<CD changer unit>
Prior to performing the following procedure, remove
the CD changer unit.
Removing the CD tray (See Fig.1 to 3)
1.
Turn the black loading pulley gear on the under side
of the CD changer unit in the direction of the arrow
and draw the CD tray toward the front until it stops.
2.
Disconnect the card wire from connector CW103 on
the CD servo board.
3.
Push down the two tray stoppers marked a and pull
out the CD tray.
CD servo board
Loading pulley gear
CD tray
CD changer uint (reverse side)
CW103
CD tray
Fig.1
Reinstall the CD tray (See Fig.4 to 5)
1.
Align the gear-cam with the gear-tray as shown fig.4,
then mount the CD tray.
2.
When assembling the CD tray, take extreme care not
engage with gear - synchro.
Gear-cam
Gear-tray
CD tray
(Tray stopper)
Fig.2
a (Tray stopper)
a
CD servo board
CW103
Fig.3
Gear-convert
Gear-convert
Gear-tray
Gear-cam
timing point
Gear-tray
CD tray
Fig.4 Fig.5
Gear-synchro
1-11
MX-G500R
Removing the sensor board / the turn
table motor assembly (See Fig.6 to 8)
Prior to performing the following procedure, remove
the CD tray.
A
1.
Remove the screw A attaching the sensor board and
release the two tabs b attaching the sensor board on
the under side of the CD tray.
2.
Disconnect the harness from connector CW1 on the
sensor board and release the harness from the two
hooks c. Remove the sensor board.
3.
Remove the screw B attaching the turn table. Detach
the turn table from the tray.
4.
Pull outward the tab marked d attaching the turn
table motor assembly on the upper side of the tray
and detach the turn table motor assembly from the
tray.
Tray
b
CW1
c
b
Sensor board
Fig.6
Turn table
B
Turn table motor assembly
Fig.7
d
Fig.8
1-12
Removing the belt, the CD servo board
and the switch board (See Fig.9 and 10)
Prior to performing the following procedure, remove
the CD tray.
1.
Detach the belt from the pulley on the upper side of
the CD changer unit (Do not stain the belt with
grease).
2.
Disconnect the card wire from the pickup unit
connector on the under side of the CD changer unit.
Attention : Solder is put up before the card wire is
removed from the pick-up unit
connector on the CD mechanism
assembly.
(When the card wire is removed without
putting up solder, the CD pick-up unit
assembly might destroy.)
3.
Disconnect the motor wire harness from connector
on the CD servo board.
4.
Remove the screw C attaching the switch board and
release the two tabs e attaching the switch board
outward and detach the switch board.
5.
Remove the two screws D attaching the CD servo
board and . First release the two tabs f and two tabs
g attaching the CD servo board motor to raise the
CD servo board slightly, then release the CD servo
board.
Tabs e
C
Switch board
CW3
CD changer unit
Fig.9
CD servo board
D
Tabs g
Soldered parts
CD mechanism board
motor connecter
Pickup unit connector
MX-G500R
Belt
Motor
Tabs f
If the tabs f and g are hard to release, it is
recommendable to unsolder the two soldered parts
on the motor terminal of the CD servo board.
Soldering
Card wire
Picup unit
connector
Fig.10
1-13
MX-G500R
Removing the CD mechanism holder
assembly (mechanism included)
(See Fig.11 to 14)
1.
Disconnect the harness from connector on the CD
mechanism board in the CD mechanism assembly
on the under side of the CD changer unit. Disconnect
the card wire from the pickup unit connector.
Attention : Solder is put up before the card wire is
removed from the pick-up unit
connector on the CD mechanism
assembly. (Refer to Fig.10)
(When the card wire is removed without
putting up solder, the CD pick-up unit
assembly might destroy.)
Motor connecter
CD changer unit
CD mechanism holder assembly
Pickup unit connector
2.
Remove the screw E attaching the shaft on the right
side of the CD mechanism holder assembly. Pull
outward the stopper fixing the shaft on the left side
and remove the CD mechanism holder assembly
from behind in the direction of the arrow y.
3.
Turn the CD mechanism holder assembly half
around the lift up slide shaft h of the CD mechanism
holder assembly until the turn table is reversed, and
pull out the CD mechanism holder assembly.
Lift up slide shaft
Fig.11
E
Stopper
CD mechanism holder assembly
Fig.12
Lift up slide shaft n
1-14
CD mechanism holder assembly
Fig.14
y
CD mechanism holder assembly
Fig.13
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