JVC MXS-6-MD Service manual

SERVICE MANUAL

COMPACT COMPONENT MD SYSTEM

MX-S6MD

Contents

Safety Precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Flow of functional operation until TOC read (MD section)

CA-MXS6MDSP-MXS6MD SP-MXS6MD

1-2 1-3 1-4 1-5 1-31

1-37

Maintenace of laser pickup (MD) Replacement of laser pickup (MD) Flow of functional operation until TOC read (CD section) Maintenance of laser pickup (CD) Replacement of laser pickup (CD) Description of major ICs

US UB UT

Area Suffix

Singapore

Hong Kong

Taiwan

1-38 1-38

1-39 1-40 1-40 1-40~69

No.20887

Nov. 2000

MX-S6MD

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.

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Move the resistor connection to eachexposed 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.).

0.15 F AC TYPE

1500 10W

Place this probe on each exposed metal part.

This corresponds to 0.5 mA AC (r.m.s.).

Good earth ground

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

1-2

MX-S6MD

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 CD/MD 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 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.

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. 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

Main board

CN451

Flexible board

MD pickup

CN321

Soldering part

CD pickup

Pickup Soldering part

1-3

MX-S6MD

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible

laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION

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

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABEL

WARNING LABEL

CLASS 1 LASER PRODUCT

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)

1-4

Disassembly method

Removing the top cover

(See Fig. 1 and 2)

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

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

MX-S6MD

Top cover

Lift up the rear part of the top cover while pulling both sides, then remove the top cover.

Removing the CD changer mechanism assembly (See Fig.3 to 5)

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

Disconnect the card wire from connector CN661 on the input board.

Remove the four screws C on the upper side of the body.

Remove the screw D on the left side of the body.

Release the wires from the clamp on the right side of the CD changer mechanism assembly. Lift up the rear part of the CD changer mechanism assembly and pull out it from the front assembly.

Fig.1

Fig.2

CD changer mechanism assembly

Top cover

CN661

CD changer mechanism assembly

Clamp

Input board

Fig.3

CD changer mechanism assembly

Front panel assembly

Fig.4Fig.5

1-5

MX-S6MD

Removing the font panel assembly

(See Fig.6 to 8)

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

Disconnect the wire from connector CN603 on the input board and the card wire from CN801 on the microcomputer board.

Remove the two screws E on the bottom of the body.

Release the joint a on the bottom and the two joints b and c on the lower sides of the body using a screwdriver. Detach the front panel assembly toward the front.

Front panel assembly

Fig.6

CN603

Joint

Microcomputer board

Fig.8

CN801

Joint c

Removing the display board (See Fig.9)

Prior to performing the following procedure, remove the top cover and the front panel assembly.

Remove the nine screws F attaching the display board to the front panel assembly.

Disconnect connector CN791 on the display board from the control board on the front panel assembly.

Removing the control board / the key board (See Fig.10)

Prior to performing the following procedure, remove the top cover, the front panel assembly and the display board.

CN791

Joint b

Fig.7

Front panel assembly

Fig.9

Input board

Front panel assembly

Display board

Key board

Remove the five screws G and the four screws H attaching the control board and the key board.

REFERANCE

1-6

When removing the control board and the key board respectively, unsolder each board.

Soldering

Fig.10

Control board

Removing the MD changer mechanism

(See Fig.11 to 13 )

Prior to performing the following procedure, remove the top cover and the CD changer mechanism assembly.

Disconnect the card wire from connectors CN511 on the main board.

Remove the four screws I on both sides of the body.

Pull out the MD changer mechanism assembly from behind upward while releasing the four joints d using a screwdriver.

MX-S6MD

MD changer mechanism assembly

Fig.11

Removing the microcomputer board

(See Fig.14)

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

Disconnect the card wire from connector CN801 on the microcomputer board.

Remove the screw D attaching the microcomputer board.

Disconnect the lower connector CN391, CN392 and CN393 from the main board by pulling them.

Joints

Fig.12

MD changer mechanism assembly

Fig.13

MD changer mechanism assembly

CN511

Joints

Microcomputer board

Fig.14

CN801

CN393

CN392

CN391

1-7

MX-S6MD

Removing the tuner board

(See Fig.15 and 16)

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

Disconnect the wire from connector CN CN112 on the tuner board.

Remove the screw J on the side of the body

Remove the two screws K on the back of the rear

3. panel.

REFERANCE

To facilitate the procedure, remove the rear panel in advance.

111 and

Remove the rear cover / the rear panel

(See Fig.15 to 17)

Prior to performing the procedure, remove the top cover.

Remove the two screws L and the two screws L' attaching the rear cover to the body.

Remove the two screws K, M, N, O, and the screw P and Q respectively.

Release the joint e on the lower left side of the rear panel.

CN112

Tuner board

Rear panel

CN111

Fig.15

Joint

Fig.16

Rear panel

Rear cover

Removing the Input board

Prior to performing the procedure, remove the top cover, the rear cover, the rear panel and the tuner board.

Disconnect the card wire from connector CN661 and the wire from CN603 on the input board.

Remove the two screws R attaching the bracket and remove the bracket in the direction of the arrow.

Disconnect the lower connector CN602, CN913 and CN922 from the main board. Disconnect the wire from CN691 on the input board.

1-8

(See Fig.18)

Input board

CN691

CN602

CN603

CN913

CN661

CN922

Fig.17

Fig.18

MX-S6MD

Removing the heat sink assembly

(See Fig.19 and 20)

Prior to performing the procedure, remove the top cover, the CD changer mechanism assembly, the rear cover, the rear panel, the tuner board and the input board.

Remove the four screws S attaching the bracket.

Disconnect connector CN924 and CN394 from the main board.

Removing the regulator board / the amplifier board (See Fig.21)

Prior to performing the procedure, remove the top cover, the CD changer mechanism assembly, the rear cover, the rear panel, the tuner board, the input board and the heat sink assembly.

Heat sink assembly

Bracket

Fig.19

Heat sink assembly

Main board

Remove the two screws T or U attaching the regulator board and the amplifier board to the heat sink.

Fig.20

Heat sink

CN924

CN394

Regulator board

Amplifier board

Fig.21

1-9

MX-S6MD

Removing the Main board (See Fig.22)

Prior to performing the procedure, remove the top cover, the CD changer mechanism assembly, the rear cover, the rear panel, the tuner board, the input board and the heat sink assembly.

Disconnect the wire from connector CN911 on the main board and CN991 on the power transformer assembly.

Disconnect the card wire from connector CN511 on the main board.

Remove the four screws V attaching the main board.

If necessary, unsolder the wire on the headphone board.

Removing the power transformer assembly (See Fig.23 and 24)

CN991

CN511

CN911

Fig.22

Main board

Soldering

Power cord stopper

Prior to performing the following procedure, remove the top cover, the rear cover, the voltage selector.

Remove the four screws W attaching the power transformer assembly.

Pull out the power cord stopper from the body upward. Turn the power transformer assembly while lifting it as shown in the figure.

Disconnect the wire from connector CN911 on the main board and CN991 on the power transformer board. Remove the power transformer assembly from the body.

Removing the headphone board

(See Fig.25)

Prior to performing the procedure, remove the top cover, the CD changer mechanism assembly, the front panel assembly, the rear cover, the rear panel, the tuner board and the input board.

Main board

Power transformer assembly

Fig.23

CN991

Power transformer assembly

CN911

Fig.24

Remove the screw X attaching the headphone board.

If necessary, unsolder the wire on the headphone board.

1-10

Headphone board

Soldering

Fig.25

MX-S6MD

Removing the voltage selector

(See Fig.26)

Prior to performing the following procedure, remove the top cover and the rear cover.

Remove the plastic rivet retaining the voltage selector.

Disengage the joint f to release the voltage selector from the transformer bracket. If necessary, unsolder each wire.

Joint

Fig.26

Plastic rivet

Voltage selector

1-11

MX-S6MD

(Bottom)

Removing the main board

(See Fig.1 and 2)

Turn over the body and disconnect the card wire from connector CN408 and the flexible wire from CN407 on the main board.

Remove the two screws A attaching the main board. Slide the main board in the direction of the arrow to release the two joints a with the single flame.

Solder part b on the pickup in the body. Disconnect the flexible harness from connector CN321 and CN451 on the underside of the main board. Then remove the main board.

Main board

CN408

CN407

Joint b Joint b

Fig.1

Main board

CN451

CN321

Removing the mechanism cover

(See Fig.3)

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

Move the mechanism cover toward the front to disengage the front hook of the mechanism cover from the internal loading assembly (Joint c). Then remove the mechanism cover upward.

1-12

Fook

Joint c

Pickup

Fig.2

Fig.3

Solder part b

Mechanism cover

Removing the head lifter (See Fig.4 to 6)

Move the head lifter on top of the body in the direction of the arrow and turn around.

Detach the spring from the hook of the body. Remove the head lifter with the spring.

If necessary, remove the spring from the head lifter.

Head lifter

Fig.5

MX-S6MD

Head lifter

Fig.4

Spring

Removing the head assembly (See Fig.7)

Remove the screw C on the upper side of the body. Remove the head assembly while pulling the flexible harness from the body.

Head lifter

Spring

Fig.6

Head assembly

Fig.7

1-13

MX-S6MD

Removing the Loading assembly

Ref:

The loading assembly, the traverse mechanism assembly and the single flame will be removable after removing the loading assembly from the body.

(See Fig.8 and 9)

Prior to performing the following procedure, remove the main board, the mechanism cover, the head lifter and the head assembly.

Remove the three screws D on the upper side of the body.

Move the loading assembly forward to disengage it from the traverse mechanism assembly (Joint d). Then remove it upward.

Remove the traverse mechanism assembly from the single flame.

Joint d

Loading assembly

Fig.8

Loading assembly

1-14

Traverse mechanism

assembly

Single flame

Fig.9

MX-S6MD

Removing the slide base (L) / (R)

(See Fig.10)

Remove the two screws E on the upper side of the loading assembly.

Remove the slide base (L) outward. (Release it from the joint bosses E.)

Remove the slide base (R) outward.

Removing the loading mechanism assembly (See Fig.11)

Detach the loading mechanism assembly upward to release the four pins on both sides from the loading motor, paying attention to the part e of the loading mechanism base.

Slide base (R)

Slide base (L)

Fig.10

Part e

Loading mechanism assembly

Removing the loading motor

(See Fig.12 and 13)

Disconnect the harnesses from the wire holder and from connector CN612 on the cam switch board.

Remove the screw F attaching the loading motor and release the joint f.

Remove the belt from the loading motor assembly.

Remove the two screws G attaching the loading motor.

Removing the cam gear and the cam switch board (See Fig.12)

Loading mechanism

assembly

Loading motor assembly

Joint f

CN612

Loading mechanism base

Fig.11

Wire holder

Cam switch board

Slit washer

Cam gear

Fig.12

Loading motor

Remove the slit washer attaching the cam gear and pull out the cam gear.

Disconnect the harness from the wire holder and from connector CN612 on the cam switch board.

Remove the two screws H and the clamp. Remove the cam switch board.

Belt

Fig.13

1-15

MX-S6MD

Removing the cartridge holder assembly

(See Fig.14 and 15)

Remove the two screws I on the upper side of the loading assembly.

Removing the slide bar and the eject bar

(See Fig.14 and 15)

Prior to performing the following procedure, remove the cartridge holder assembly.

Slide bar

Cartridge holder assembly

Eject bar

Part g

Fig.14

Remove the slide bar upward.

Move the eject bar outward until it stops as shown in Fig.14. Push the convex part g on the bottom of the body and remove the eject bar from the chassis.

Slide bar

Eject bar

UD base

1-16

Cartridge holder assembly

Fig.15

MX-S6MD

Removing the Insulators (See Fig.16)

Disengage the four insulators from the notches of the traverse mechanism chassis.

Removing the pickup unit (See Fig.17)

Turn over the traverse mechanism assembly and remove the screw J attaching the shaft holder (F).

Move the shaft inward and remove it from the shaft holder (R).

Pickup unit

Insulators

Traverse machanism chassis

Fig.16

Joint h

Pickup guide

Pickup unit

Insulators

Detach the shaft side of the pickup unit upward and release the joint h with the pickup guide. Then remove the pickup unit with the shaft.

Removing the pickup (See Fig.18)

Draw out the shaft from the pickup.

Remove the two screws K attaching the rack spring.

Shaft holder (F)

Rack spring

Shaft holder (R)

Fig.17

Pickup

Fig.18

Shaft

1-17

MX-S6MD

Removing the feed motor assembly

(See Fig.19-1, 19-2)

It is not necessary to remove the pickup unit.

For the white and black harnesses extending from the feed motor assembly, unsolder the soldering i on the traverse mechanism board.

Traberse mechanism board Soldering j

Remove the two screws L attaching the feed motor assembly.

Remove the two screws N attaching the feed motor bracket.

Removing the traverse mechanism board (See Fig.19-1)

Prior to performing procedure, remove the feed motor assembly.

For the red and black harnesses extending from the spindle motor, unsolder the soldering j on the traverse mechanism board.

Soldering i

Feed motor assembly

Fig.19-1

Feed motor

Feed motor bracket

Remove the screw M attaching the traverse mechanism board.

Fig.19-2

1-18

Reattach the eject bar to the UD base.

(Fig.15 and 20)

Reattach the slide bar to the loading mechanism chassis while fitting the boss marked k to the eject bar slot. (Fig.20)

Slide the slide bar and the eject bar in the direction of the arrow in Fig.20 and reattach the cartridge holder assembly using the two screws I.

(Fig.20 and 21)

MX-S6MD

ATTENTION:

Make sure the pin of the eject lever marked l is fitted to the slot of the eject bar marked m at the bottom of the loading mechanism chassis after moving the eject lever and the loading slider of the cartridge holder assembly in the direction of the arrow.

(Refer to Fig.21)

Slide bar

Cam switch board

Point marked

Cam switch boss

Ditch

UD base

Eject bar

Fig.20

Ditch m

UD base (Bottom)

Cartridge holder assembly

Loading slider

Eject lever

Fig.21

1-19

MX-S6MD

Reattach the wire holder to the UD base while engaging the UD base hook marked u to the wire holder slot marked t (At the same time, the boss on the reverse side of the wire holder is fitted to the UD base round hole).

Reattach the cam switch board using the two screws H. (Fig.22)

Turn the cam switch to bring the boss to the point marked on the cam switch board. Reattach the cam gear using a slit washer while fitting the cam gear slot to the cam switch boss. (Fig.22)

ATTENTION:

When reattaching the cam gear, the cam switch boss should be fitted to the cam gear slot, and the triangle mark of the cam gear should be aligned to the hole of the eject bar as shown in Fig.22.

Reattach the loading motor assembly, using the screw F. Connect the harness extending from the loading motor to connector CN612 on the switch board and fix it with the wire holder. (Fig.22)

Slide bar CN612

Loading motor assembly

Point marked

Boss

Cam switch

Cam switch board

1-20

Eject lever

Fig.22

Cam gear

Cam gear (Triangle mark)

Eject lever

MX-S6MD

Reattach the UD base while engaging the four pins on both sides of the UD base to the notches of the loading mechanism base and placing the edge (marked e’) of the cartridge holder assembly under the hook e of the loading mechanism base. (Fig.23)

Reattach the slide base (R) while fitting the two pins on another side of the UD base to the slots of the slide base (R). (Fig.24)

ATTENTION:

10.

Reattach the slide base (L) on the slide base (R) while fitting the two pins on another side of the UD base to the slots of the slide base (L) (Fig.25). Make sure the two slots of the slide base (L) are fitted to the two bosses marked E’ and tighten the two screws E. (Fig.26)

Ref:

To expedite the work, bring up the UD base slightly when fitting each pin to the appropriate notch.

Fit the part v of the slide base (R) to the part w on the inward side of the cam gear rib. (Fig.25)

Hook e

Hook e'

Loading mechanism base

Fig.23

Slide base (R)

Part v

Slide base (L)

Part w

Fig.24

Slide base (L)Slide base (R)

Slide base (R)

Cam gear

Part v

Part w

Fig.25Fig.26

1-21

MX-S6MD

Removing the servo control board

(See Fig.1 to 4)

ATTENTION:

Insert a screwdriver into the sub chassis slot on the back of the body and push the slider (R) toward the front.

From the top of the body, slide the hook and the slider (R) forward until they stop.

From the right side of the body, slide the slide cam (L) backward until it stops. The sub chassis unit will move to the lowest position.

From the bottom of the body, unsolder each soldered part a and b of the motors on the servo control board.

Remove the five screws A attaching the servo control board.

Disconnect connector CN610 on the servo control board from the tray select switch board to suspend the servo control board tentatively. Solder the part c of the flexible wire connected to connector CN601 on the underside of the servo control board.

Make sure the sub chassis unit is locating at the lowest position. If not,perform the following procedure from 1 to 3.

Slot

Sub chassis unit

Hook

Tray select switch board

CN610

Slide cam (L)

Fig.1

Slider (R)

Slide cam (L)

Fig.2

Cam switch

Disconnect the flexible wire from connector CN601 and remove the servo control board from the body.

ATTENTION:

Control cam

Slot p

In case of disconnecting the flexible wire without soldering, the CD pick up may be damaged.

When reassembling, make sure the cam switch boss of the servo control board is fitted to the slot p of the control cam on the bottom of the body (Refer to Fig.3-1).

Cam switch boss

Gear base unit

Main board

Solder part a

Solder part b

Solder part c

CN601

Servo control board

Fig.3-1

Servo control board

Fig.4Fig.3-2

1-22

MX-S6MD

Removing the tray unit (See Fig.5 to 8)

The tray unit can be removed despite the position of the sub chassis unit, but the lowest position is recommended to expedite the work.

Remove the four screws B attaching the top cover on the top of the body.

Remove the top cover with the two rods attached to the top cover and the clamper base unit.

Pull the lock lever of the return spring on the right side of the body to eject the tray unit.

From the top of the body, release the tray from the joint hook marked d (Push the tray toward the front).

Release the stoppers on both sides in the direction of the arrow and pull out the tray unit from the body.

ATTENTION:

Pull out the tray unit from the top tray 3 in sequence.

Top cover

Rod

Clamper base unit

Fig.5

Top cover

Both

Joint d

Tray

Tray unit

Tray

Both

Rod

Clamper base unit

Fig.6

Tray unit

Tray 3

Hook

Tray

Hook

Tray

Fig.8

Return spring

Lock lever

Fig.7

1-23

MX-S6MD

Removing the side unit (L) and (R)

(See Fig.9-1 to 9-5)

Prior to performing the following procedures, remove the servo control board, the top cover and the tray unit.

Remove the two screws C attaching the side unit (L).

Slide and remove the side unit (L) toward the front while releasing the two joints e and the joint f with the chassis unit.

Slide the slide cam (L) toward the front until it stops to place the sub chassis unit at the top position.

ATTENTION:

Turn the hook gear counterclockwise to move the slide hook and the slider (R) backward until they stop.

Remove the three screws D attaching the side unit (R). Raise the side unit (R) upward and release the joint g with the chassis unit and the boss from the select arm marked h. Then remove the side unit (R) from the body.

The side unit (R) can be removed when the sub chassis unit is located at the top position.

Side unit (R)

Hook gear

Joint g

slide hook

Slider (R)

Side unit (L)

Joint h

Select arm

Fig.9-1

Joints e

Side unit (L)

Joint f

Slide cam(L)

ATTENTION:

Side unit (R)

When reassembling, make sure the boss is fitted to the select arm marked h.

Boss

Select arm

Side unit (L)

Joint f

Side unit (R)

Joints e

Fig.9-2

Fig.9-3

Joint g

1-24

Joint h

Fig.9-5Fig.9-4

Removing the sub chassis unit

(See Fig.10 to 12)

Prior to performing the following procedures, remove the servo control board, the top cover, the tray unit, the side unit (L) and the side unit (R).

Turn the hook gear counterclockwise to move the slide hook and the slider (R) backward until they stop.

Slide the slide cam (L) and the slide cam (R) in the direction of the arrow until they stop.

(The notches of each slide cam are fitted to the pins on both sides of the sub chassis unit.)

Detach the sub chassis unit upward.

ATTENTION:

When reassembling, turn the hook gear of the chassis unit counterclockwise until it stops and slide the slide hook and the slider (R) of the sub chassis unit backward until they stop.

MX-S6MD

Slide cam (L)

Slide cam (R)

Sub chassis unit

Fig.10

Sub chassis unit

Slider (R)

slide hook

Slide cam (L)

Notch

Fig.11

Hook gear

Fig.12

1-25

MX-S6MD

Removing the flap base unit and the gear base unit (See Fig.13 and 14)

Prior to performing the following procedures, remove the servo control board, the top cover, the tray unit, the side unit (L) and the side unit (R).

Remove the screw E attaching the flap base unit. Release the joint tabs i and j, then remove the flap base unit from the body.

Remove the belts from the two pulleys on the gear base unit.

Remove the three screws F and remove the gear base unit from the body.

Joint tab j

Flap base unit

Joint tab i

Fig.13

Gear base unit

Removing the motors (See Fig.15)

Prior to performing the following procedure, remove the main board.

Remove the belts from the two pulleys.

Remove the four screws G and detach each motor from the body.

Belt

Fig.14

Motor

1-26

Motor

Fig.15

MX-S6MD

Removing the pickup (See Fig.16 to 20)

From the top of the body, remove the three screws H attaching the clamper base unit.

Remove the clamper base unit with the two rods attached to the clamper base unit and the top cover.

Turn the screw shaft gear marked k in the direction of the arrow to move the pickup unit.

Remove the screw I attaching the shaft holder.

Move the screw shaft in the direction of the arrow and release it from the joint l. Then release it from the joint m with the pickup holder. Detach the pickup with the screw shaft.

Solder the part n of the flexible board on the underside of the pickup. After soldering, disconnect the flexible wire connected to the pickup (In case of disconnecting the flexible wire without soldering, it may cause damage to the CD pickup).

Remove the two screws J attaching the rack arm to the pickup unit.

Fig.16

Clamper base

Top cover

Rod

Clamper base unit

Pull out the screw shaft from the pickup.

Part n (soldering)

Fig.19

Rack arm

Flexible board

Shaft holder

Fig.17

Rods

Top cover

Joint m

Screw shaft

Fig.20

Pickup

Joint l

Fig.18

1-27

MX-S6MD

Removing the traverse mechanism assembly (See Fig.21)

Prior to performing the following procedure, remove the servo control board and the clamper base unit.

Remove the three screws K attaching the traverse mechanism assembly.

Detach the rear part of the traverse mechanism assembly upward to release the joint o with the sub chassis unit. Then remove the assembly from the body.

Removing the feed motor (See Fig.22)

Prior to performing the following procedure, remove the traverse mechanism assembly.

Remove the screw L attaching the feed motor.

Traverse mechanism assembly

Fig.21

Joint o

Feed motor

Removing the tray select switch board

(See Fig.5,6 and 23)

Remove the four screws B attaching the top cover on the top of the body.

Remove the top cover with the two rods attached to the top cover and the clamper base unit.

Remove the screw M on the right side of the body.

Top cover

Rod

Fig.22

Top cover

Fig.5

Tray select switch board

Clamper base unit

1-28

Clamper base unit

Fig.6

Rod

Fig.23

CN620

MX-S6MD

Information This is a method of dis assembly. As parts of the repair of this speaker system, it is only the speaker box assemblies. It is not possible to supply with each part unit.

Prior to performing the following procedure, remove the front grille.

Removing the speaker (woofer)

(See Fig.1,3 to 5)

Insert a screwdriver under the ornament grille attached to the woofer.

Pull out the ornament grille with each boss by means of a lever as shown in Fig.2.

ATTENTION:

Remove the four screws A and the woofer from the body. Disconnect the wire from the speaker terminals.

As the ornament grille is damaged, replace it with the woofer.

When replacing the ornament grille, make sure the boss with adequate amount of bond.

Ornament grille

Boss

Ornament grille

Tweeter

Woofer

Boss

Fig.1

Boss

Ornament grille

Push

Woofer

Stick

Driver

Fig.2

Boss 4

Fig.3

1-29

MX-S6MD

Removing the speaker (tweeter) (See Fig.4 and 5)

Insert a screwdriver under the ornament grille and remove it from the body.

ATTENTION:

Remove the three screws B and the tweeter from the body. Disconnect the wire from the speaker terminals.

As the ornament grille is damaged, replace it with the tweeter.

Tweeter

Ornament grille

Fig.4

Driver

Tweeter

Woofer

Fig.5

1-30

+ 73 hidden pages