JVC MX-DVA9 User manual

SERVICE MANUAL
COMPACT COMPONENT SYSTEM
No.21040
Oct. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
MX-DVA9/MX-DVA9R
MX-DVA9/MX-DVA9R
Contents
Safety Precautions
Preventing static electricity
Precautions for service
Important for laser products
Disassembly method
Adjustment method
Flow of functional operation until Toc read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-2
1-4
1-5
1-6
1-7
1-28
1-34
1-35
1-35
1-36
B -------------------------- U.K.
EN ------- Northern Europe
MX-DVA9R
Area suffix
(SP-DSC99TN) (SP-DSS99TN)
SP-MXG79 CA-MXDVA9/CA-MXDVA9R SP-MXG79
US ---------------------- Singapore
UW ---------- Brazil,Mexico,Peru
UJ --------------------- U.S.Military
UG - Turkey,South Africa,Egypt
UN ----------------------------Asean
MX-DVA9
Area suffix
A ------------------------- Australia
Center unit Speaker unit
CA-MXDVA9/CA-MXDVA9R SP-MXDVA9/SP-MXDVA9R
SP-MXG79(Front speaker)
SP-DSC99TN(Center speaker)
SP-DSS99TN(Surround speaker)

MX-DVA9/MX-DVA9R
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 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.).
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 and C version)

MX-DVA9/MX-DVA9R
1-3
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.
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 ; furthermore the
manufacturer cannot accept responsibility for 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 original lead
routing and dress should be observed, and it should be confirmed that they have been returned
to normal, after re-assembling.
!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.
(U.K only)

MX-DVA9/MX-DVA9R
1-4
Preventing 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.
1.1. Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
1.1.1. Ground the workbench
1. 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.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
1.1.3. 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 next page.)
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.
1.2. 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. For specific details, refer to the replacement procedure in the text. 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

MX-DVA9/MX-DVA9R
1-5
Precautions for service
Handling of Traverse Unit and Laser Pickup
1. Do not touch any peripheral element of the pickup or the actuator.
2. The traverse unit and the pickup are precision devices and therefore must not be subjected to
strong shock.
3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the
internal power supply of the tester.)
4. When replacing the pickup, after mounting a new pickup, remove the solder on the short land
which is provided at the center of the flexible wire to open the circuit.
5. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the
characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body. Before repairing peripheral elements of the traverse
unit or pickup, be sure to take the following electrostatic protection:
1. Wear an antistatic wrist wrap.
2. With a conductive sheet or a steel plate on the workbench on which
the traverse unit or the pick up is to be repaired, ground the sheet
or the plate.
When you remove the traverse mechanism from the servo control substrate
The laser diode of pick-up might be destroyed by static electricity and set switch (S11) on the pick-up board
on "SHORT" side, please before removing the card wire from connector (CN10).
Moreover, please set switch (S11) on "OPEN" side after assembling and inserting the card wire in
connector (CN10) without fail at times.
When you remove the pick-up from the traverse mechanism
The laser diode of the pick-up might be destroyed by static electricity, and solder with part a, please before
extracting a flexible wire from connector (CN12).
Moreover, please remove solder in part a after inserting a flexible wire in connector (CN12).
CN12
CN10
OPEN
SHORT
SWITCH S11
Soldering part
Traverse
mechanism
Traverse
mechanism
Pick-up

MX-DVA9/MX-DVA9R
1-6
Important for laser products
1.CLASS 2 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
WARNING LABEL
CLASS 2
LASER PRODUCT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.

MX-DVA9/MX-DVA9R
1-7
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-DVA9/MX-DVA9R
1-8
Prior to performing the following procedure, remove
the metal cover.
Disconnect the card wire from connector CN542 on
the main board on the right side of the body.
Disconnect the wire from CN501 on the DVD servo
board in the lower part of the DVD mechanism
assembly, on the left side of the body.
Remove the screw Ffrom the rear panel on the
back of the body. Disconnect the earth terminal
extending from the DVD changer mechanism
assembly and attached to the terminal on the
antenna board.
Remove the two screws Con top of the body and
the two screws Don back of the body.
Remove the DVD changer mechanism from behind
upward while pulling the front panel assembly and
the rear panel outward.
1.
2.
3.
Disconnect the card wire from connector CN540 and
CN541 on the inner side of the main board on the
right side of the body, and remove the DVD
mechanism assembly.
6.
Removing the DVD mechanism assembly
(See Fig.4 to 7)
At this point, the two card wires in the
lower part of the DVD mechanism
assembly is still connected.
REFERENCE:
To prevent damage to the DVD fitting, be
sure to pull both the rear panel and the
front panel assembly enough to remove
the DVD changer mechanism assembly.
REFERENCE:
To prevent damage to the DVD changer
mechanism assembly, make sure to pull
both the front panel assembly and the rear
panel outward enough to remove the DVD
changer mechanism assembly.
REFERENCE:
Fig.4
Fig.5
Fig.6
Fig.7
Front panel assembly
C
C
DVD changer
mechanism assembly
Rear panel
Main board
CN542
DVD changer mechanism assembly
D
Tuner board
Front panel assembly
Rear panel
Front panel assembly
DVD changer mechanism assembly
CN501
Rear panel
Main board
CN542
CN541
CN540
F
DVD changer mechanism assembly
Rear panel Earth terminal
Tuner board

MX-DVA9/MX-DVA9R
1-9
Prior to performing the following procedure, remove
the metal cover and DVD changer mechanism
assembly.
Disconnect the card wires from connector CN500,
CN505 and CN510 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 plastic rivet attaching the main board to
the front assembly on the right side of the body.
Remove the two screws Eon 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.
6.
Removing the front panel assembly
(See Fig.8 to 12)
Fig.8
Fig.9
Wire clamp
Power amplifier board (2)
CN703 Main board
CN500
CN505
CN510
Transformer board
CN220
Front panel
assembly
Plastic rivet
Front panel assembly Main board
Fig.10
Fig.11
Fig.12
E
Front panel assembly
Joint a
Joint a
Front panel assembly
Front panel assembly
(Bottom)

MX-DVA9/MX-DVA9R
1-10
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 Fon the back of the body.
1.
2.
3.
Removing the tuner board
(See Fig.13 and 14)
Prior to performing the following procedure, remove
the metal cover and the DVD changer mechanism
assembly, the tuner board.
Remove the screw Gattaching 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 fourteen (A/B/EN) or sixteen(US/UJ/UG/
UN/UW) screws Fattaching 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.15 to 17)
When reassembling, connect the earth
terminal which is extending from the
DVD changer mechanism assembly and
attached to the tuner board, to the inner
side of the rear panel.
CAUTION:
Fig.15-1
Rear panel
F
F
F
F
F
Fig.15-2
Rear panel
F
F
F
F
F
FF
Fig.13
Fig.14
Fig.16
Fig.17
CN1
Plastic rivet
Tuner board Rear panel
Rear panel
G
Joints b
Joints b
Rear cover
Joint c
Joint c Rear panel Rear panel
F

MX-DVA9/MX-DVA9R
1-11
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly, the rear panel and the antenna board.
Disconnect the card wire from connector CN500,
CN505, CN510 and the wire from CN513 on the
main board respectively.
Remove the plastic rivet and the screw Hattaching
the main board on the right side of the body.
Disconnect connector CN521 on the main board
from the analog output board outward. Disconnect
connector CN530 and CN531 in the lower part of the
main board from the regulator board upward.
1.
2.
3.
Removing the main board
(See Fig.18 and 19)
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly and the rear panel.
Disconnect connector CN287 on the speaker board
from the regulator board.
1.
Removing the speaker board
(See Fig.20)
It is not necessary to remove the main
board.
REFERENCE:
Fig.18
Fig.19
Fig.20
Front panel assembly
Main board
CN513
CN505
CN510
Plastic rivet Main board
CN521
HCN531 Regulator board
CN287 Speaker board
CN500
Analog output board
CN520
Analog output board
CN530

MX-DVA9/MX-DVA9R
1-12
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly and the rear panel.
Disconnect the wire from connector CN218 and
CN219(only US/UJ/UG/UN/UW) on the power board.
Move the power cord stopper upward and remove.
Disconnect connector CN213 on the power board
from the regulator board.
Remove the two wire clamps fixing the power cord
and disconnect the power cord from connector
CN250 on the power board.
1.
2.
3.
4.
Removing the power board / power cord
(See Fig.21)
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly, the rear panel and the antenna board.
Disconnect the wire from connector CN513 on the
main board.
Remove the two wire clamps fixing the wire on the
analog output board.
Disconnect the wire extending from the fan from
connector CN705 on the power amplifier board (2).
Disconnect connector CN370 (only US/UJ/UG/UN/
UW) CN371 on the analog output board from the
main board. Disconnect connector CN372 and
CN373 on the analog output board from the power
amplifier board (1) and the power amplifier board (2)
respectively upward.
Remove the two screws Iand the fan from the fan
bracket.
1.
2.
3.
4.
5.
Removing the analog output board / fan
(See Fig.22 to 24)
Fig.21
Fig.24
Power board
CN250
Wire clamps
CN213
Power cord
Power cord stopper
Fan
Analog output board
Fan bracket I
CN218
CN219
Fig.22
Fig.23
Wire clamp
CN370
Wire clamp
Analog output board
CN371 Main board
CN513
Power amplifier board (2)
CN705
Fan
Analog output board
CN373
CN372
CN371
Main board
CN370

MX-DVA9/MX-DVA9R
1-13
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly, the rear panel, the antenna board and the
analog output board.
Disconnect the wire from connector CN513 on the
main board.
Remove the wire clamp on the power amplifier board
(1).
Disconnect the wire from connector CN703 on the
power amplifier board (2).
Disconnect connector CN310 on the power amplifier
board (1) and CN701 on the power amplifier board
(2) from the regulator board upward. The heat sink is
detached with the power amplifier board (1) and the
power amplifier board (2).
Remove the four screws Jattaching the power
amplifier board (1) to the heat sink.
Remove the four screws Kattaching the power
amplifier board (2) to the heat sink.
1.
2.
3.
4.
5.
6.
Removing the power amplifier board (1)
/ power amplifier board (2) / heat sink
(See Fig.25 to 27)
Fig.25
Fig.26
Fig.27
Wire clamp
Power amplifier
board (1)
CN310 Regulator board
CN701
Heat sink
Power amplifier
board (2)
Main board
CN513 CN703
Heat sink
Power amplifier board (1) Power amplifier board (2)
J
J
Power amplifier board (1) Power amplifier board (2)
Heat sink
K
K

MX-DVA9/MX-DVA9R
1-14
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly and the rear panel.
Disconnect the wire from connector CN218 and
CN219(only US/UJ/UG/UN/UW) on the power board.
Remove the two wire clamps on the power amplifier
board (1) and power board.
Disconnect the wire from connector CN204 on the
regulator board.
Disconnect the wire from connector CN220 on the
transformer board.
Remove the four screws Lattaching the power
transformer assembly.
1.
2.
3.
4.
5.
Removing the power transformer assembly
(See Fig.28 and 29)
Prior to performing the following procedure, remove
the metal cover, the DVD changer mechanism
assembly, the rear panel, the antenna board, the
main board, the analog output board, the power
board, the power amplifier board (1), the power
amplifier board (2) and the speaker board.
Disconnect the wire from connector CN204 on the
regulator board.
Remove the two screws M.
1.
2.
Removing the regulator board
(See Fig.30)
Fig.28
Fig.29
Fig.30
Wire clamps
Transformer board
CN220
M
M
Regulator board
CN204
Power transformer assembly
Power board
CN218
Regulator board
CN204
Power transformer assembly
LL
L
L
L
CN220
Power transformer assembly
Wire clamp
Regulator board
CN204
CN219

MX-DVA9/MX-DVA9R
1-15
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the DVD 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.31)
Remove the four screws Oattaching the stay
bracket.
Disconnect the card wires from connector CN316
and CN881 on the display system control board.
Remove the six screws P attaching the display
system control board.
If necessary, disconnect the wire from connector
CN870 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.32 to 34)
Fig.31
Head amplifier
& mechanism control board
CN306 N
N
N
N
N
Cassette mechanism
assembly
Fig.32
Fig.33
Fig.34
O
O
Display system control board Stay bracket
P
P
P
P
CN881
FW915
(Solding) P
Display system control board
FW915
FW915
CD eject board
CN911
Display system control board
CN870
CN316

MX-DVA9/MX-DVA9R
1-16
Remove the three screws Qattaching the DVD eject
board.
If necessary, unsolder FW915 on the DVD eject
board.
1.
2.
Removing the CD eject board
(See Fig.35)
Prior to performing the following procedure, remove
the display system control board.
Pull out the preset knob on the front panel.
Remove the five 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.36 and 37)
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
and the surround woofer level knob toward the front.
Pull out the mic level knob toward the front.
(only US/UJ/UG/UN/UW)
Remove the eleven (A/B/EN) or thirteen (US/UJ/UG/
UN/UW) screws Sattaching the operation switch
board.
Release each tab of the seven joints gretaining the
1.
2.
3.
Removing the operation switch board
(See Fig.37 and 38)
DVD eject board
FW915
(Solding)
Q
Q
Fig.35
Fig.36
Fig.37
Preset / tuning switch board R
R
Volume knob Nut
Surround woofer
level knob
Surround mode knob
Preset knob
FW915
(Solding)
Operation switch board
Mic level knob
Fig.38-2
S
S
S
S
S
S
S
Joint g
Joint g
Joint g
Joints g
Joints g
Operation
switch board
Fig.38-1
S
S
S
S
S
S
S
Joint g
Joint g
Joint g
Joints g
Joints g
Operation
switch board

MX-DVA9/MX-DVA9R
1-17
Remove the six screws Aon the side of the body.
1.
<Speaker unit section>
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)
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-DVA9/MX-DVA9R
1-18
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-DVA9/MX-DVA9R
1-19
DVD Changer Mechanism Section
Removing the DVD Servo control
board
1.
2.
3.
4.
5.
Remove the Metal cover.
Remove the DVD changer mechanism assembly.
From bottom side the DVD changer mechanism
assembly, remove the one screw 1 retaining the DVD
Servo control board.
Ciconnect the card wire,From the connectors CN101
and CN102, on the DVD Servo control board.
Disengage the two engagements "A" , remove the DVD
Servo control board.
Removing the DVD tray assembly
(See Fig.2~4)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the front panel assembly.
Remove the DVD changer mechanism assembly.
Remove the DVD Servo control board.
Remove the screw 2 retaining the Disc stopper
(See Fig.3).
Remove the three screws 3 retaining the T.bracket
(See Fig.3).
From the clamper base section "C" , remove both of the
edges fixing the rod(See Fig.2 and 3).
Remove the screw 4 retaining the clamper assembly
(See Fig.3).
From the left side face of the chassis assembly, remove
the one screw 5 retaining 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.
Fig.1
Fig.2
Fig.3
Fig.4
1
DVD servo control baord
CN102
CN101
AA
B
C
Rod
T.Braket
Clamper base
2
3
3
4
3
T.Braket Disc stopper
Lod stopper
(C/J version only)
Clamper ass'y
C
B
D
Lock lever
Return spring
5

MX-DVA9/MX-DVA9R
1-20
11.
12.
Check whether the lifter unit stopper has been caught
into the hole at the section "E" of DVD tray assembly
as shown in Fig.5.
Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the
left side face of the DVD Traverse mechanism
assembly.
Fig.5
Fig.7Fig.6
Fig.8 Fig.9
[Caution] In case the driver unit elevator is not at above
position, set the elevator to the position as
shown in Fig.7 by manually turning the pulley
gear as shown in Fig.8.
13.
14.
15.
Manually turn the motor pulley in the clockwise
direction until the lifter unit stopper is lowered from the
section "E" of DVD tray assembly(See Fig.8).
Pull out all of the three stages of DVD tray assembly in
the arrow direction "F" until these stages stop
(See Fig.6).
At the position where the DVD tray assembly has
stoppend, pull out the DVD tray assembly while
pressing the two pawls "G and G' " on the back side of
DVD tray assembly(See Fig.9). In this case, it is easy
to pull out the assembly when it is pulled out first from
the stage DVD tray assembly.
DVD tray
assembly
E
Drive unit of elevator
DVD tray assembly
F
Refer to Fig.7 Pawl
Chassis assembly
Pulley gear
Motor pulley
Pawl ,
DVD tray assembly
Stopper
G
G G'