JVC MXDVA-9, MXDVA-9-R Service manual

MX-DVA9/MX-DVA9R

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-DVA9/MX-DVA9R

Contents

Area suffix

MX-DVA9R

B -------------------------- U.K. EN ------- Northern Europe

SP-MXG79 CA-MXDVA9/CA-MXDVA9R SP-MXG79

Area suffix

MX-DVA9

A ------------------------- Australia

US ---------------------- Singapore

(SP-DSC99TN)

Center unit Speaker unit CA-MXDVA9/CA-MXDVA9R SP-MXDVA9/SP-MXDVA9R SP-MXG79(Front speaker) SP-DSC99TN(Center speaker) SP-DSS99TN(Surround speaker)

(SP-DSS99TN)

UW ---------- Brazil,Mexico,Peru UJ --------------------- U.S.Military UG - Turkey,South Africa,Egypt UN ----------------------------Asean

Safety Precautions Preventing static electricity Precautions for service Important for laser products Disassembly method

1-2 1-4 1-5 1-6 1-7

Adjustment method Flow of functional operation until Toc read Maintenance of laser pickup Replacement of laser pickup Description of major ICs

1-28 1-34 1-35 1-35 1-36

No.21040 Oct. 2001

MX-DVA9/MX-DVA9R

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.).

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 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.

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)

1-2

MX-DVA9/MX-DVA9R

(U.K only)

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.

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-DVA9/MX-DVA9R

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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

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

1-4

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:

MX-DVA9/MX-DVA9R

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.

Traverse

mechanism

CN10

CN12

SWITCH S11

SHORT

OPEN

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).

Pick-up

Soldering part

Traverse mechanism

1-5

MX-DVA9/MX-DVA9R

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.

Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 2 LASER PRODUCT

1-6

MX-DVA9/MX-DVA9R

Disassembly method

Removing the metal cover

(See Fig.1 to 3)

Remove the six screws A on the back of the body.

Remove the two screws B on both sides of the body.

Remove the metal cover from the body by lifting the rear part of the cover.

CAUTION:

Do not break the front panel tab fitted to the metal cover.

Metal cover

Fig.1

Fig.2

Metal cover

Fig.3

1-7

MX-DVA9/MX-DVA9R

Removing the DVD mechanism assembly (See Fig.4 to 7)

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 F from 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 C on top of the body and the two screws D on back of the body.

Remove the DVD changer mechanism from behind upward while pulling the front panel assembly and the rear panel outward.

Main board

CN542

Rear panel

Front panel assembly

DVD changer mechanism assembly

Fig.4

DVD changer mechanism assembly

CN501

Rear panel

Front panel assembly

REFERENCE:

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.

REFERENCE:

At this point, the two card wires in the lower part of the DVD mechanism assembly is still connected.

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.

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.

Fig.5

Tuner board

DVD changer mechanism assembly

Main board

CN542

CN541

CN540

Front panel assembly

Fig.6

Rear panel

Earth terminal

Rear panel

Tuner board

1-8

DVD changer mechanism assembly

Fig.7

MX-DVA9/MX-DVA9R

Removing the front panel assembly

(See Fig.8 to 12)

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 E on the bottom of the body.

Release the two joints a on the lower right and left sides of the body using a screwdriver, and remove the front panel assembly toward the front.

Power amplifier board (2)

CN703

Wire clamp

Fig.8

Plastic rivet

Main board

CN500

CN505

CN510

Front panel assembly

Transformer board

CN220

Front panel assembly

Fig.9

Main board

(Bottom)

Fig.10

Joint a

Front panel assembly

Fig.12

Front panel assembly

Fig.11

Joint a

1-9

MX-DVA9/MX-DVA9R

Removing the tuner board

(See Fig.13 and 14)

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 F on the back of the body.

CAUTION:

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.

Removing the rear cover / rear panel

(See Fig.15 to 17)

Plastic rivet

Joints b

CN1

Tuner board

Fig.13

Rear panel

Joints b

Prior to performing the following procedure, remove the metal cover and the DVD changer mechanism assembly, the tuner board.

Remove the screw G attaching the rear cover on the back of the body.

Push each tab of the four joints b in the direction of the arrow and release.

Remove the fourteen (A/B/EN) or sixteen(US/UJ/UG/ UN/UW) screws F attaching the rear panel.

Disengage the joints c on each lower side of the rear panel using a screwdriver and remove the rear panel backward.

Rear cover

Fig.14

Fig.15-1

Rear panel

1-10

Joint c

Fig.17

Rear panel

Fig.16

Joint c

Fig.15-2

MX-DVA9/MX-DVA9R

Removing the main board

(See Fig.18 and 19)

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 H attaching 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.

Main board

CN513

Analog output board

Plastic rivet

CN510

CN505

CN500

Fig.18

Main board

CN521

Front panel assembly

Analog output board

CN520

Removing the speaker board

(See Fig.20)

Prior to performing the following procedure, remove the metal cover, the DVD changer mechanism assembly and the rear panel.

REFERENCE:

Disconnect connector CN287 on the speaker board from the regulator board.

It is not necessary to remove the main board.

CN287

CN530

Fig.19

Speaker board

Fig.20

CN531

Regulator board

1-11

MX-DVA9/MX-DVA9R

Removing the power board / power cord

(See Fig.21)

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.

2. 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.

Removing the analog output board / fan

(See Fig.22 to 24)

CN218

CN219

Power board

CN250

Power cord

Power cord stopper

Analog output board

Wire clamp

CN213

Fig.21

CN370

Wire clamp

CN371

Wire clamps

Main board

CN513

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 I and the fan from the fan bracket.

Main board

CN370

Fan

CN371

Power amplifier board (2)

CN705

Fig.22

Analog output board

CN372

CN373

Fig.23

Analog output board

1-12

Fan bracket

Fan

Fig.24

MX-DVA9/MX-DVA9R

Removing the power amplifier board (1) / power amplifier board (2) / heat sink

(See Fig.25 to 27)

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).

Main board

CN513

Power amplifier

board (2)

Heat sink

CN701

Power amplifier board (1)

CN703

CN310

Fig.25

Power amplifier board (2)

Wire clamp

Power amplifier

Regulator board

board (1)

Heat sink

Remove the four screws J attaching the power amplifier board (1) to the heat sink.

Remove the four screws K attaching the power amplifier board (2) to the heat sink.

Power amplifier board (1)

Heat sink

Fig.26

Power amplifier board (2)

Fig.27

1-13

MX-DVA9/MX-DVA9R

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 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 L attaching the power transformer assembly.

Removing the regulator board

(See Fig.30)

CN219

Power board

CN218

Power transformer assembly

Wire clamps

Wire clamp

Transformer board

CN220

Fig.28

Regulator board

CN204

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.

Power transformer assembly

Fig.29

Fig.30

CN220

Regulator board

CN204

1-14

MX-DVA9/MX-DVA9R

Prior to performing the following procedure, remove the metal cover, the DVD changer mechanism assembly and the front panel assembly.

Removing the cassette mechanism assembly (See Fig.31)

Disconnect the card wire from connector CN306 on the head amplifier & mechanism control board.

Remove the seven screws N attaching the cassette mechanism assembly.

Removing the display system control board (See Fig.32 to 34)

Remove the four screws O attaching the stay bracket.

Head amplifier & mechanism control board CN306

Cassette mechanism assembly

Fig.31

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.

Display system control board

CN316

FW915

(Solding)

CN881

CN911

Fig.32

CN870

Display system control board

Fig.33

CD eject board

Stay bracket

FW915

Display system control board

FW915

Fig.34

1-15

MX-DVA9/MX-DVA9R

Removing the CD eject board

(See Fig.35)

Remove the three screws Q attaching the DVD eject board.

If necessary, unsolder FW915 on the DVD eject board.

Removing the preset / tuning switch board (See Fig.36 and 37)

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 R attaching the preset / tuning switch board.

If necessary, unsolder FW901 on the preset / tuning switch board.

Removing the operation switch board

(See Fig.37 and 38)

Prior to performing the following procedure, remove the display system control board and the preset / tuning switch board.

DVD eject board

FW915

(Solding)

Preset / tuning switch board

FW915

(Solding)

Preset knob

Fig.35

Fig.36

Operation switch board

Surround mode knob

Surround woofer level knob

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 S attaching the operation switch board.

Release each tab of the seven joints g retaining the

Joints g

Joint g

Operation switch board

Joint g

Joints g

Fig.38-2

Joint g

Joints g

Volume knob

Joints g

Fig.37

Fig.38-1

Nut

Mic level knob

Joint g

Operation switch board

1-16

Removing the side cover (See Fig.1)

Remove the six screws A on the side of the body.

Removing the squawker speaker

(See Fig.2)

Prior to performing the following procedure, remove the side cover.

Remove the four screws B on the side of the body.

Disconnect the red and black wires from the speaker terminals on the squawker speaker.

MX-DVA9/MX-DVA9R

Side cover

Fig.1

Removing the front cover (See Fig.3 to 5)

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 C and D respectively.

Remove the front cover toward the front and disconnect the yellow and black wires from the two tweeter speaker terminals.

Front cover

Squawker speaker

Fig.2

Fig.4

Joints a

Saran net

Fig.3

1-17

MX-DVA9/MX-DVA9R

Removing the woofer speaker (See Fig.6)

Prior to performing the following procedure, remove the side cover and the front cover.

Tweeter speaker

Fig.5

Remove the four screws E on 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.

Removing the tweeter speaker

(See Fig.7)

Prior to performing the following procedure, remove the side cover and the front cover.

Remove the two screws F attaching the tweeter speaker on the back of the front cover.

Woofer speaker

Fig.6

Tweeter speaker

1-18

Front cover

Fig.7

DVD Changer Mechanism Section

Removing the DVD Servo control board

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

4. and CN102, on the DVD Servo control board.

Disengage the two engagements "A" , remove the DVD

5. Servo control board.

Removing the DVD tray assembly (See Fig.2~4)

Remove the front panel assembly.

1. Remove the DVD changer mechanism assembly.

2. Remove the DVD Servo control board.

3. Remove the screw 2 retaining the Disc stopper

4. (See Fig.3). Remove the three screws 3 retaining the T.bracket

5. (See Fig.3). From the clamper base section "C" , remove both of the

6. edges fixing the rod(See Fig.2 and 3). Remove the screw 4 retaining the clamper assembly

7. (See Fig.3). From the left side face of the chassis assembly, remove

8. 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

9. spring, dismount the return spring(See Fig.4). Remove the three lock levers(See Fig.4).

10.

Disc stopper

T.Braket

MX-DVA9/MX-DVA9R

DVD servo control baord

CN102

CN101

Fig.1

Clamper base

Rod

T.Braket

Fig.2

Clamper ass'y

Fig.3

Lod stopper (C/J version only)

Return spring

Lock lever

Fig.4

1-19

MX-DVA9/MX-DVA9R

11.

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

12. shown in Fig.6 from to the second or fifth hole on the left side face of the DVD Traverse mechanism assembly.

[Caution]

13.

14.

15.

Chassis assembly

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.

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.

Fig.5

Stopper

DVD tray assembly

Refer to Fig.7

Pulley gear

Pawl

DVD tray assembly

Drive unit of elevator

Fig.7Fig.6

DVD tray assembly

1-20

Motor pulley

Fig.8

Pawl ,

Fig.9

MX-DVA9/MX-DVA9R

Removing the DVD mechanism assembly(See Fig.10)

1.2.While turning the cams R1 and R2 assembly in the arrow direction "H" . align the shaft "I" of the DVD mechanism assembly to the position shown in Fig.10. Remove the four screw 6 retaining the DVD mechanism assembly.

Removing the DVD mechanism (See Fig.11 and 12 )

For dismounting only the DVD machanism without

1. removing the DVD mechanism assembly, align the shaft "J" of the DVD mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow direction "K" . By raising the DVD mechanism assembly in the arrow

2. direction "L" , remove the assembly from the lifter unit (See Fig.12).

Cam R1, R2 assembly

Cams R1, R2 assembly

Arrow

CD mechanism assembly

Fig.10

CD mechanism

Arrow

Lifter unit

Fig.11

Fig.12

Arrow

1-21

MX-DVA9/MX-DVA9R

Removing the actuator motor boad (See Fig.14, 15)

Absord the four soldered positions "M" of the right and left motors with a soldering absorber(See Fig.14).

Remove the two screws 7 retaining the actuator motor board(See Fig.14). Remove the two screws 8 retaining the tray select

3. switch board(See Fig.15).

Removing the can unit (See Fig.15~18 )

Remove the CD mechanism assembly.

While turning the cam gear L, align the pawl "N" position of the drive unit to the notch position(Fig.15) on the cam gear L. Pull out the drive unit and cylinder gear(See Fig.17).

3. While turning the cam gear L, align the pawl "O"

4. position of the select lever to the notch position(Fig.18) on the cam gear L. Remove the four screws 9 retaining the cam unit(cam

5. gear L and cams R1/R2 assembly)(See Fig.18).

Motor L

Actuator motor board

Fig.14

Motor R

Chassis assembly

CN801

Fig.15

CN802

Drive unit

Tray select switch board

Cylinder gear

CN804

Drive unit

Cam gear L

Fig.16

Cams R1, R2 assembly

Cam unit

1-22

Fig.17

Select lever

Fig.18

MX-DVA9/MX-DVA9R

Removing the actuator motor and belt (See Fig.19~22)

Remove the two screws 10 retaining the gear bracket (See Fig.19).

While pressing the pawl "P" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.19). From the notch "Q section" on the chassis assembly

3. fixing the edge of gear bracket, remove and take out the gear bracket(See Fig. 20). Remove the belts respectively from the right and left

4. actuator motor pulleys and pulley gears(See Fig. 19). After turning over the chassis assembly, remove the

5. actuator motor while spreading the four pawls "R" fixing the right and left actuator motors in the arrow direction(See Fig. 21).

[Note]

When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed, then the pulley gear as well as the gear, etc. constituting the gear unit can possibly be separated to pieces. In such a case, assemble these parts by referring to the assembly and configuration diagram in Fig. 22.

Pully gear

Gear bracket

Belt

Motor pulley

Fig.19

Actuator motor

Pulley gear Belt

Motor pulley

Pawl

Chassis assembly

Gear bracket

Fig.20

Assembly and Configuration Diagram

Pulley gear

Fig.21

Pulley gear

Gear B

Cylinder gear

Gear B

Gear C

Select gear

Gross gear L

Fig.22

Gross gear U

Gear C

1-23

MX-DVA9/MX-DVA9R

Removing the cams R1/R2 assembly and cam gear L(See Fig.23)

Remove the slit washer fixing the cams R1 and R2

1. assembly. By removing the two pawls "S" fixing the cam R1,

2. separate R2 from R1. Remove the slit washer fixing the cam gear L.

3. Pull out the cam gear L from the C.G. base assembly.

Removing the C.G. base assembly (See Fig.23 and 24)

Remove the three screws 11 retaining the C.G. base assembly.

[Caution]

To retassemble the cylinder gear, etc.with the cam unit (cam gear and cans R1/R2 assembly), gear unit and drive unit, align the position of the pawl "N" on the drive unit to that o f the notch on the cam gear L. Then, make sure that the gear unit is engaged by turning the cam gear L (See Fig. 24).

Slit washer

Cam gear L

Slit washer

Cam R2

Pawl

Cam R1

Cam switch board

C.G. base assembly

Pawl

Notch

Pawl

Cylinder gear

Drive unit

Fig.23

Cam gear L

Cam R1, R2 assembly

Gear unit

Gear bracket

Fig.24

1-24

MX-DVA9/MX-DVA9R

< Cassette Mechanism Section >

Removing the Playback,Recording and Eraser Heads (See Fig.1~3)

1. While shifting the trigger arms seen on the right side of the head mount in the arrow direction,turn the flywheel R in counterclockwise direction until the head mount has gone out with a click (See Fig. 1).

2. When the flywheel R is rotated in counterclockwise direction, the playback head will be turned in counterclockwise direction from the position in Fig.2 to that in Fig.3.

3. At this position, disconnect the flexible P.C.board (outgoing from the playback head) from the connector CN301 on the head amp. and mechanism control P.C. board.

4. After dismounting the FPC holder,remove the flexible P.C.board.

5. Remove the flexible P.C.board from the chassis base.

6. Remove the spring "a" from behind the playback head.

7. Loosen the reversing azimuth screw retaining the playback head.

8. Take out the playback head from the front of the head mount.

9. The recording and eraser heads should also be removed similarly according to Steps 1~8 above.

Reassembling the Playback, Recording

and Eraser Heads (See Fig.2,3)

Cassette mechanism

Fig.1

Playback/Recording & eraser head

Flexible P.C.board

CN301

Head amplifier & mechanism control P.C. board

Fig.2

Flywheel R

Trigger armHead mount

(Mechanism A side)

Spring "a"

Trigger arm

Flywheel R

(Mechanism A side)

1. Reassemble the playback head from the front of the head mount to the position as shown in Fig.3.

2. Fix the reversing azimuth screw.

3. Set the spring a from behind the playback head.

4. Attach the flexible P.C.board to the chassis base, and fix it with the FPC holder as shown in Fig.3.

5. The recording and eraser heads should also be reassembled similarly according to Steps 1~4 above.

Playback head

Spring "a"

FPC holder

Fig.3

Reversing azimuth screw

Head mount

Flexible P.C.board

CN302

Head amplifier & mechanism control P.C. board

(Mechanism B side)

1-25

MX-DVA9/MX-DVA9R

Removing the head Amp.and Mechanism Control P.C.Board (See Fig. 4)

1.Remove the cassette mechanism assembly.

2.After turning over the cassette mechanism assembly,remove the five screws "A" retaining the head amp. and mechanism control P.C. board

3.Disconnect the connectors CN303 and CN304 on the P.C.Board and the connectors CN1 on both the right and left side reel pulse P.C.Boards.

4.When necessary, remove the 4pin parallel wire soldered to the main motor

Removing the Capstan Motor Assembly

1.Remove the six screws "B" retaining capstan motor assembly (See Fig. 5).

2.While raising the capstan motor, remove the capstan belts A and B respectively from the motor pulley (See Fig. 6).

Flexible board

Head amplifier & mechanism control board

CN304

CN302 CN301

Flexible board

CN303

Fig.4

Capstan motor assembly

Caution 1: Be sure to handle the capstan belts so carefully that these belts will not be stained by grease and other foreign matter. Moreover, these belts should be hand while referring to the capstan belt hanging method.

Capstan belt A

BBBB

Fig.5

Capstan motor

Capstan belt B

1-26

Capstan belt A

Capstan belt B

Motor pulley

Fig.7 Fig.6

MX-DVA9/MX-DVA9R

Removing the Capstan Motor (See Fig. 8)

From the joint bracket, remove the two screws "C" retaining the capstan motor.

Removing the Flywheel (See Fig. 9,10)

1.Remove the head amp. and mechanism control P.C.Board.

2.Remove the capstan motor assembly.

3.After turning over the cassette mechanism, remove the slit washers "a" and "b" fixing the capstan shafts R and L, and pull out the flywheels R and L respectively from behind the cassette mechanism.

Capstan motor

Joint bracket

Fig.8

Flywheel R Flywheel L

Fig.10

Removing the Reel Pulse P.C.Board and Solenoid (See Fig. 11)

1.Remove the five pawls (c,d,e,f,g) retaining the reel pulse P.C.Board.

2.From the surface of the reel pulse P.C.Board parts, remove the two pawls "h" and "i" retaining the solenoid.

Solenoid

Slit washer "a"

Fig.9

Slit washer "b"

Reel pulse board

Solenoid

Fig.11

1-27

MX-DVA9/MX-DVA9R

Adjustment method

Measurement instruments required for adjustment

1. Low frequency oscillator, This oscillator should have a capacity to output 0dBs to 600ohm at an oscillation frequency of 50Hz-20kHz.

2. Attenuator impedance : 600ohm

3. Electronic voltmeter

4. Frequency counter

5. Wow flutter meter

6. Test tape VT712 : For Tape speed and wow flutter ( 3kHz) VT724 : For Reference level (1kHz) VT703L : For Head angle(10kHz)

Because of frequency-mixed tape with 63,1k,10k and 14kHz(250nWb/m -24dB). Use this tape together with a filter.

7. Blank tape TAPE : AC-225

8. Torque gauge : For play and back tension Forward ; TW2111A, Reverse ; TW2121A Fast Forward and Rewind ; TW2231A

9. Test disc : CTS-1000(12cm),GRG-1211(8cm)

10. Jitter meter

Radio input signal

AM modulation frequency : 400Hz Modulation factor : 30% FM modulation frequency : 400Hz Frequency displacement : 22.5kHz

Frequency Range A/B/EN

AM 522kHz~1629kHz FM 87.5MHz~108MHz

US/UJ/UG/UN/UW AM 531kHz~1602kHz FM 87.5MHz~108MHz

Standard measurement positions of volume and switch

Power : Standby (Light STANDBY Indicator) Sub woofer VOL. : Minimum Sound mode : OFF Main VOL. : 0 Minimum Traverse mecha set position : Disc 1 Mic MIX VOL : MAX ECHO : OFF

Measurement conditions

Power supply voltage AC120V(60Hz)

Measurement output terminal : Speaker out :TP101(Mesuring for TUNER/DECK/CD) :Dummy load 6ohm

Precautions for measurement

1. Apply 30pF and 33kohm to the IF sweeper output side and 0.082 F and 100kohm in series to the sweeper input side.

2. The IF sweeper output level should be made as low as possible within the adjustable range.

3. Since the IF sweeper is a fixed device, there is no need to adjust this sweeper.

4. Since a ceramic oscillator is used, there is no need to perform any MPX adjustment.

5. Since a fixed coil is used, there is no need to adjust the FM tracking.

6. The input and output earth systems are separated. In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels, therefore, the earth should be connected particularly.

7. In the case of BTL connection amplifier, the minus terminal of speaker is not for earthing. Therefore, be sure not to connect any other earth terminal to this terminal. This system is of an OTL system.

1-28

DVD section

TEST MODE FOR DVD a INITIALISE THE DVD UNIT BOARD

a) Insert A/C Power Cord b) At standby mode press Stop Button and CANCEL/DEMO button.

Wait 4 seconds & for the display of " TEST VERSION REGION " i.e. TEST JC 1

c) Press the 'ENTER' button on remocon. The FL panel will display 'EEPROM'.

Plug out and plug in again the power cord. Repeat the process 1(a) and 1(b) again.

Confirm that the Area Code and Region Code is correctly display as below.

MX-DVA9/MX-DVA9R

Are Code FL indicate of Area Code in Test mode

Region Code.

J/C

UG/UX

US/UN/UP

E/EN/B

Note: Please plug out and plug in the power cord from A/C supply before continue the next test.

Adjustment Jig setup

1. Remove the rubber cushion from each of the four corners of the traverse mechanism. (When installing be sure not to make a mistake with the cushion colors).

2. Install the jig stud.

3. Make a jig clamp. (Remove the clamp from the set and assemble it as shown in the diagram below.

Green rubber cushion

Blue rubber cushion

Note:

How to handle the pickup To protect the pickup from electro-static damage, make sure to hold it by the die-cast chassis (optical base). And make sure that pickup lens do not touch the top cover.

How to prepare a clamp

Remove the claws from the 3 locations

Jig stud

Disassemble the clamp and holder

Installing the 4 jig studs

Blue rubber cushion

Combine the clamp and holder to become a jig clamp.

1-29

MX-DVA9/MX-DVA9R

Integrated wiring for adjustment

1. Place a board on top of the unit and put the changer on it. Then carry out the wiring of the

main unit.

2. Connect a extension cable to the traverse mechanism for adjustment and then connect them to the changer.

3. Remove the solder of the short-circuited flexible wire. Then remove the short-circuited pin from the traverse mechanism

4. Connection is completed.

Adjustment preparation

1. The 3 adjustment locations

2. 1.4 mm hexagonal wrench

3. Set the VT-501 or the VT502 test disc.

FL jitter display

1. Connect the power cable while pressing the (OPEN/CLOSE) button of DISC1 and (PLAY) button simultaneously.

--- The DISC no. " " is displayed on the FL indicator.

2. Press the 3D-PHONIC key button of remote controller to commence initialization.

3. When the key (PLAY) is pressed the jitter value is displayed.

4. Adjust the jitter value to minimum by using the adjust screw.

a). Turn the adjustment screw ( A and B )

clockwise half.

b). Return the adjustment screw ( A and B ) to

former position.

c). Turn the adjustment screw ( A and B )

counterclockwise half.

d). Set the adjustment screw ( A and B ) to the

position of best jitter at three positions.

Next, do it similar to the above-mentioned in

adjustment screw A and C.

Extension cord QUQ605-4040AJ

Adjustment location (Adjust screw C )

Adjustment location (Adjust screw A )

Jig ass'y clamp adjustment

Stud JIGXVM555

Hexagonal wrench

(Adjust screw B )

Test disc

1-30

3 locations for adjustment

Adjust by using a hexagonal wrench

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