JVC MX-GT98V User manual

SERVICE MANUAL
COMPACT COMPONENT SYSTEM
No.21026
Sep. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
MX-GT98V/MX-GT95V
MX-GT88V/MX-GT85V
MX-G78V/MX-G75V
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
1-2
1-3
1-4
1-5
1-29
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-33
1-34
1-34
1-35~49
Contents
(No MIC jack and MIC LEVEL volume for UN ver.)
MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
COMPACT
DIGITAL VIDEO
COMPACT
DIGITAL AUDIO
Area suffix
US -------- Singapore
UN --------------Asean
SP-MXGT98V
SP-MXGT95V
SP-MXGT98V
SP-MXGT95V CA-MXGT98V CA-MXGT95V

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-2
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 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,
particularly 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.).
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
!
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 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&C version)

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-3
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 laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. 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.
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.
Position of labels
WARNING LABEL
!CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e)
VARNING : Osynlig laserstrålning
är denna del är öppnad och spårren
är
urkopplad. Betrakta ej strålen.
(s)
VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d)
ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)
CLASS 1
LASER PRODUCT
CLASS 1
LASER PRODUCT

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
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 traverse unit is decomposed
1. Remove the disk stopper and T. bracket on the CD changer mechanism
assembly.
2. Disconnect the harness from connector on the CD motor board.
3. CD traverse unit is put up as shown in Fig.1.
4. Solder is put up before the card wire is removed from connector CN601
on the CD servo control board as shown in Fig. 2.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
5. Please remove solder after connecting the card wire with CN601 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 traverse mechanism.
Soldering
Fig.1
Fig.2
CD changer
mechanism
assembly
CD traverse
unit
Flexible cable

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-5
Remove the six screws Aon the back of the body.
Remove the two screws Bon both sides of the
body.
Remove the metal cover from the body by lifting the
rear part of the cover.
1.
2.
3.
Disassembly method
<Main body>
Removing the metal cover
(See Fig.1 to 3)
Do not break the front panel tab fitted to
the metal cover.
CAUTION: Fig.1
Fig.2
Fig.3
A
A
A
Metal cover
Metal cover
B
Metal cover
B

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-6
Prior to performing the following procedure, remove
the metal cover.
Disconnect the wire from connector CN705 on the
amplifier board.
Remove the plastic rivet attaching the main board to
the front assembly on the right side of the body.
Disconnect the card wire from connector CN561 on
the main board.
Remove the two screws Con the upper side of the
body and the two screws Don the back of the rear
panel.
Pull both the rear panel and the front panel assembly
to the outside, then remove the CD changer
mechanism assembly by lifting the rear part of the
assembly.
1.
2.
3.
4.
5.
Disconnect the card wire from connector CN504 on
the inner side of the main board on the right side of
the body. Remove the CD mechanism assembly.
6.
Removing the CD changer mechanism
assembly (See Fig.4 and 6)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Turn over the CD changer mechanism assembly and
remove the two screws Eattaching the fan.
1.
Removing the fan (See Fig.7)
To prevent damage to the CD fitting, be
sure to pull both the rear panel and the
front panel assembly enough to remove
the CD changer mechanism assembly.
CAUTION:
At this point, one card wire on the
underside of the CD mechanism
assembly is still connected.
REFERENCE:
Fig.4
Fig.5
Fig.6
Fig.7
Front panel assembly
C
C
CD changer
mechanism assembly
Rear panel
Main board
CN561
CN504
CD changer mechanism assembly
D
Main board
CN561
Front panel assembly
Rear panel
CD changer mechanism assembly Front panel assembly
Amplifier board
CN705
CN504
Fan
E
E
CD changer mechanism assembly
Rear panel
Plastic rivet

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-7
Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board respectively.
Remove the wire clamp and disconnect the wire from
connector CN703 on the amplifier board.
Disconnect the wire from connector CN220 on the
transformer board.
Remove the two screws Fon the bottom of the
body.
Release the two joints aon the lower right and left
sides of the body using a screwdriver, and remove
the front panel assembly toward the front.
1.
2.
3.
4.
5.
Removing the front panel assembly
(See Fig.8 to 11)
Fig.9
Fig.10
Fig.11
F
(Bottom)
Joint a
Joint a
Front panel assembly
Front panel assembly
Fig.8
Wire clamp
Amplifier board
CN703
Main board
CN870
CN871
CN315
Transformer board
CN220
Front panel
assembly

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-8
Prior to performing the following procedure, remove
the metal cover.
Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
Remove the plastic rivet fixing the tuner board.
Remove the two screws Gon the back of the body.
1.
2.
3.
Removing the tuner board
(See Fig.12)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Remove the screw Hattaching the rear cover on the
back of the body.
Push each tab of the four joints bin the direction of
the arrow and release.
Remove the fifteen screws Gattaching the rear
panel.
Disengage the joints con each lower side of the rear
panel using a screwdriver and remove the rear panel
backward.
1.
2.
3.
4.
Removing the rear cover / rear panel
(See Fig.13 to 16)
Fig.12
Fig.13
Fig.14
Fig.15Fig.16
CN1
Plastic rivet
Tuner board
Rear panel
Rear panel
H
G
Joint b
Joint b
Rear cover
Rear panel
G
G
GG
G
Joint c
Joint c Rear panel Rear panel
G

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-9
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the rear panel and the antenna board.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board.
Disconnect the wires from connector CN704 and
CN706 on the amplifier board.
Remove the screw I attaching the main board on
the right side ofthe body.
Disconnect connector CN211 and CN212 on the
main board from the regulator board.
1.
2.
3.
4.
Removing the main board
(See Fig.17 and 18)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect connector CN217 on the speaker board
from the regulator board.
1.
Removing the speaker board
(See Fig.19)
It is not necessary to remove the main
board.
REFERENCE:
Fig.17
Fig.18
Fig.19
Front panel assembly
Amplifier board
CN704
CN706
Main board
CN870
CN871
CN315
Main board
Front panel assembly
ICN211
CN212
Regulator board
Regulator board CN217
Speaker board

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-10
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wires from connector CN703, CN704
and CN706 on the amplifier board respectively.
Remove the two wire clamps attaching the wire to
the amplifier board and the voltage board.
Disconnect connector CN215 on the amplifier board
and CN216 on the voltage board from the regulator
board (The heat sink will be detached at once).
Remove the four screws Jattaching the amplifier
board to the heat sink.
Remove the two screws K, the board bracket and
the voltage board.
1.
2.
3.
4.
5.
Removing the amplifier board / voltage
board / heat sink (See Fig.21 and 22)
Prior to performing the following procedure, remove
the metal cover, the CD changermechanism
assembly and the rear panel.
Remove a wire clamp on the power board.
Disconnect the wire from connector CN218, CN219
and CN250 on the power board.
Disconnect connector CN251 on the power board
from the regulator board.
1.
2.
3.
Removing the power board (See Fig.20)
It is not necessary to remove the power
board.
REFERENCE:
Fig.21
Fig.20
Fig.22
Amplifier board
CN704
CN706
CN216
Regulator board
CN215
Wire clamp
Wire clamp
CN703
Voltage board
Amplifier board
Heat sink
Voltage board
J
J
K
CN218
Power board
CN219
Wire clamp
CN251
CN250

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-11
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wires from connector CN218 and
CN219 on the power board.
Disconnect the wire from connector CN204 on the
regulator board.
Release the wire from the stopper on the regulator
board.
Remove the four screws Lattaching the transformer
assembly.
1.
2.
3.
4.
Removing the power transformer
assembly (See Fig.23 and 24)
Prior to performing the following procedure, remove
metal cover, CD changer mechanism assembly, rear
panel, antenna board, main board, amplifier board,
voltage board, power board and speaker board.
Disconnect the wire from connector CN204 on the
regulator board.
Release the wire from the stopper on the regulator
board.
Remove the two screws M attaching the regulator
board.
1.
2.
3.
Removing the regulator board
(See Fig.25)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wire from connector CN250 on the
power board.
Remove the wire clamp from the power board.
Move the power cord stopper upward and pull out it
from the base chassis.
1.
2.
3.
Removing the power cord (See Fig.26)
Fig.23
Fig.24
Fig.25
Fig.26
CN219
Regulator board
CN204
Power transformer assembly
Power transformer
assembly Regulator board
CN204
LL
M
M
Power transformer assembly
Power board
CN218
Stopper
Regulator board
CN204
Stopper
Power board
CN250
Power cord stopper
Wire clamp
Base chassis

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-12
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the front panel assembly.
Disconnect the card wire from connector CN306 on
the head amplifier & mechanism control board.
Remove the seven screws Nattaching the cassette
mechanism assembly.
1.
2.
Removing the cassette mechanism
assembly (See Fig.27)
Remove the four screws Oattaching the stay
bracket.
Disconnect the card wires from connector CN316
and CN880 on the display system control board.
Remove the six screws P attaching the display
system control board.
If necessary, disconnect the wire from connector
CN911 on the front side of the display system control
board and unsolder FW915.
1.
2.
3.
4.
Removing the display system control
board (See Fig.28 to 30)
Remove the three screws Qattaching the CD eject
board.
If necessary, unsolder FW915 on the CD eject
board.
1.
2.
Removing the CD eject board
(See Fig.30 and 31)
Fig.27
Head amplifier
& mechanismcontrol board
CN306 N
N
N
N
Cassette mechanism
assembly
Fig.28
Fig.29
Fig.30
Fig.31
O
Display system control board Stay bracket
P
P
P
P
CN316
CN880
FW915
(Solding) P
Display system control board
FW915
FW915
CD eject board
CN911
Display system control board
CD eject board
FW915
(Solding)
Q
Q

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-13
Prior to performing the following procedure, remove
the display system control board.
Pull out the preset knob on the front panel.
Remove the four screws Rattaching the preset /
tuning switch board.
If necessary, unsolder FW901 on the preset / tuning
switch board.
1.
2.
3.
Removing the preset / tuning switch
board (See Fig.32 and 33)
Prior to performing the following procedure, remove
the display system control board and the preset /
tuning switch board.
Pull out the volume knob on the front panel and
remove the nut. Pull out the surround mode knob,
the mic level knob and the surround woofer level
knob toward the front.
Remove the thirteen screws Sattaching the
operation switch board. (CA-MXG75V / MXG78V,
CA-MXGT85V / MXGT88V)
Remove the twelve screws Sattaching the
operation switch board. (CA-MXGT95V / MXGT98V)
Release each tab of the seven joints gretaining the
operation switch board.
1.
2.
3.
Removing the operation switch board
(See Fig.33 and 34)
Fig.32
Fig.33
Fig.34
Preset / tuning switch board
R
R
Volume knob Nut
Surround woofer
level knob
Surround mode knob
Preset knob
S
S
S
S
S
S
S
Joint g
Joint g
Joint g
Joints g
Joints g
Operation
switch board
Fig.34
S
S
S
S
S
S
S
Joint g
Joint g
Joint g
Joints g
Joints g
Operation
switch board
Mic level knob
CA-MXG75V / MXG78V
CA-MXGT85V / MXGT88V
(CA-MXGT95V / MXGT98V)

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-14
Remove the four screws Aattaching the front panel
on the front of the body.
Pull out the front panel toward the front and
disconnect the wire from the two speaker terminals
of the speaker (tweeter) on the back of the front
panel.
1.
2.
<Speaker section>
[for MX-GT98V/MX-GT95V]
Removing the front panel
(See Fig.1 and 2)
Prior to performing the following procedures, remove
the front panel.
Remove the two screws Battaching the speaker
(tweeter) on the back of the front panel.
1.
Removing the speaker (tweeter)
(See Fig.3)
Prior to performing the following procedures, remove
the front panel.
Remove the six screws Cattaching the sub panel
on the back of the front panel.
Pull out the sub panel toward the front.
1.
2.
Removing the sub panel (See Fig.4)
Fig.1
Fig.2
Fig.3
Fig.4
A
A
A
A
B
Sub panel
Speaker (tweeter)
C
C
Speaker (tweeter)
Speaker terminals
CSpeaker (tweeter)
Front panel
Front panel
Front panel
Front panel

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-15
Prior to performing the following procedures, remove
the front panel.
Remove the four screws Eattaching the speaker
(squawker) on the front of the body.
Disconnect the wire from the two speaker terminals
of the speaker (squawker).
1.
2.
Removing the speaker (squawker)
(See Fig.5)
Prior to performing the following procedures, remove
the front panel.
Remove the eight screws Dattaching the punch
panel on the front of the body.
Remove the six screws Fattaching the speaker
(woofer) on the front of the body.
Remove the speaker (woofer) toward the front and
disconnect the wire from the two speaker terminals.
1.
2.
3.
Removing the speaker (woofer)
(See Fig.6 and 7)
Remove the four screws Gattaching the duct on the
upper side of the body.
Move the duct upwards and pull out backward.
1.
2.
Removing the duct (See Fig.8)
Fig.5
Fig.6
Fig.7Fig.8
D
Speaker (squawker)
D
E
E
Speaker (woofer)
F
Front panel
G
Duct G
Speaker (squawker)
Punch panel
F

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-16
Remove the four screws Aattaching the front panel
on the front of the body.
Pull out the front panel toward the front.
1.
2.
[for MX-GT88V/MX-GT85V]
Removing the front panel (See Fig.1)
Prior to performing the following procedures, remove
the front panel.
Remove the two screws Battaching the speaker
(tweeter) on the front of the body.
Disconnect the wire from two speaker terminals of
the speaker (tweeter).
1.
2.
Removing the supeaker (tweete)
(See Fig.2)
Prior to performing the following procedures, remove
the front panel.
Remove the four screws Cattaching the speaker
(squawker) on the front of the body.
Disconnect the wire from the two speaker terminals
of the speaker (squawker).
1.
2.
Removing the speaker (squawker)
(See Fig.3)
Fig.1
Fig.2
Fig.3
AA
AA
Front panel
B
Speaker (squawker)
Spealer (tweeter)
Speaker (squawker)
CC

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-17
Prior to performing the following procedures, remove
the front paenel.
Remove the six screws Dattaching the punch panel
on the front of the body.
Remove the four screws Eattaching the speaker
(woofer) on the front of the body.
Pull out the speaker (woofer) toward the front and
disconnect the wire from the two speaker terminals.
1.
2.
3.
Removing the speaker (woofer)
(See Fig.4 and 5)
Prior to performing the following procedures, remove
the front panel.
Remove the six screws Fattaching the sub panel on
the back of the front panel
.
Remove the sub panel toward the front.
1.
2.
Removing the sub panel (See Fig.6 )
Remove the four screws Gattaching the duct on the
upper side of the body.
Move the duct upwards and pull out backward.
1.
2.
Removing the duct (See Fig.7)
Fig.4
Fig.5
Fig.6Fig.7
D
Punch panel
D
EE
Speaker (woofer)
Sub panel
F
F
Front paenl
G
Duct
G
Front paenl

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-18
Remove the six screws Aon the side of the body.
1.
Removing the side cover (See Fig.1)
Prior to performing the following procedure, remove
the side cover.
Remove the four screws Bon the side of the body.
Disconnect the red and black wires from the speaker
terminals on the squawker speaker.
1.
2.
Removing the squawker speaker
(See Fig.2)
Prior to performing the following procedure, remove
the side cover.
Pull out the saran net toward the front while
disengaging the four joints a.
Remove the two screws Cand Drespectively.
Remove the front cover toward the front and
disconnect the yellow and black wires from the two
tweeter speaker terminals.
1.
2.
3.
Removing the front cover (See Fig.3 to 5)
[for MX-G78V/MX-G75V]
Fig.1
Fig.2
Fig.3
A
A
A
A
Side cover
B
Squawker speaker
B
Joints a
Joints a
Saran net
Fig.4
Front cover
CC
DD

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-19
Prior to performing the following procedure, remove
the side cover and the front cover.
Remove the four screws Eon the front of the body.
Pull out the woofer speaker toward the front and
disconnect the wire (yellow and black,blue and
black) from the two speaker terminals.
1.
2.
Removing the woofer speaker (See Fig.6)
Prior to performing the following procedure, remove
the side cover and the front cover.
Remove the two screws Fattaching the tweeter
speaker on the back of the front cover.
1.
Removing the tweeter speaker
(See Fig.7)
Fig.5
Fig.6
Fig.7
Woofer speaker
E
Tweeter speaker
E
Tweeter speaker
Front cover
F

MX-GT98V/MX-GT95V/MX-GT88V
MX-GT85V/MX-G78V/MX-G75V
1-20
Removing the CD Servo control board
(See Fig.1)
Removing the CD tray assembly
(See Fig.2~4)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the front panel assembly.
Remove the CD changer mechanism assembly.
Remove the CD Servo control board.
Remove the screw B' retaining the lod stopper.
From the T.bracket section "b" and clamper base
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
Remove the screw B retaining the disc stopper
(See Fig.3).
Remove the three screws Cretaining the T.bracket
(See Fig.3).
Remove the screw Dretaining the clamper assembly
(See Fig.3).
From the left side face of the chassis assembly, remove
the one screw Eretaining both of the return spring and
lock lever(See Fig. 4).
By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).
Remove the three lock levers(See Fig.4).
10.
11.
Fig.1
Fig.2
Fig.3 Fig.4
1.Remove the metal cover.
2.Remove the CD changer mechanism assembly.
3.From bottom side the CD changer mechanism assembly,
remove the four screws Aretaining the CD servo control
board.
4.Absorb the four soldered positions "a" of the right and
left motors with a soldering absorber.
5.Pull out the earth wire on the CD changer mechanism
assembly.
6.Disconnect the connector CN854 on the CD servo
control board.
7.Disconnect the card wire CN601 and the connector
CN801 on the CD servo control board.
CN601
CN801
b
c
E
Rod
T.Braket
Clamper base
T.Braket Disc stopper
Lod stopper
(C/J version only)
Clamper ass'y
b
a
CC
B'
D
C
d
Lock lever
Return spring
CD servo control board
CN651
CN854
a
a
A
A
A
A
CN151
CN652
B
Earth
wire