JVC UXA-10 Service manual

SERVICE MANUAL

MICRO COMPONENT MD SYSTEM

UX-A10DVD

Contents

Safety precaution Preventing static electricity Disassembly method Adjustment method Maintenance of MD pickup

1-2 1-3 1-4 1-39 1-47

Area suffix

UB ----------- Hong Kong

Procedures of changing the MD pickup Maintenance of DVD pickup Procedures of changing the DVD pickup Description of major ICs

1-47 1-48

1-48 1-49~88

No.22011

Jan. 2003

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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.

(This regulation does not correspond to J and C version.)

1-2

Preventing static electricity

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1.Grounding to prevent damage by static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

2.About the earth processing for the destruction prevention by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to detach the substrate.

1.Solder is put up before the card wire is removed from connector on the CD substrate as shown in Figure. (When the wire is removed without putting up solder, the pick-up assembly might destroy.)

2.Please remove solder after connecting the card wire with when you install picking up in the substrate.

Sorting round point

CN321

Servo control board

CN101

Flexible wire

CN101

DVD mechanism assembly

MD mechanism assembly

Pickup

Soldering

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Disassembly method

Removing the metal cover (See Fig.1~3)

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

Remove the screw B on each side of the body.

Detach the rear side of the metal cover upward while pulling the lower sides outward.

Metal cover

Fig.1

Metal cover

1-4

Fig.2

Metal cover

Fig.3

Removing the DVD mechanism assembly

(See Fig.4~6)

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

Remove the three screws C attaching the DVD mechanism assembly on top of the body.

Disconnect connector CN502 and CN503 on the DVD servo board upward at the bottom of the DVD mechanism assembly. Bring up the DVD mechanism assembly and remove backward.

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DVD mechanism assembly

Fig.4

DVD mechanism assembly

CN503

DVD mechanism assembly

CN502

Fig.5

Fig.6

1-5

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Removing the front panel assembly

(See Fig.7~10)

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

Disconnect the card wire from connector CN705 on the microcomputer board in the center of the right side of the body.

Disconnect the card wire from connector CN301 on the main board in the center of the left side of the body.

Disconnect the card wire from connector CN704, and the wires from CN703 and CN710 on the microcomputer board.

Front panel assembly

Microcomputer board

CN705

Fig.7

ATTENTION:

Disconnect the card wire from connector CN442 on the FL connection board on top of the body.

Remove the screw D on each side of the body.

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

Release the joint a on the bottom and the two joints b on the right and left sides of the body using a screwdriver. Remove the front panel assembly toward the front.

When disconnecting the wires from CN703 and CN710, remove the spacer attaching the wires.

FL connection board

CN442

Front panel assembly

Main board

CN301

CN710

CN703

Fig.8

Front panel assembly

Spacer

Microcomputer board

CN704

Front panel assembly

1-6

CN710

CN703

Spacer

Microcomputer board

CN704

Fig.10Fig.9

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Removing the rear cover/ rear panel

(See Fig.11~15)

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

Remove the two screws F on the back of the body.

Disconnect the wire from connector CN1 on the tuner pack on the right side of the body.

Remove the thirteen screws G on the back of the body.

Release the two joints c on the lower right and left sides of the rear panel.

REFERENCE:

The rear panel with the tuner pack comes off.

Rear cover

Rear panel

Fig.11

Tuner pack

CN1

Fig.12

Rear panel

FIg.13

Rear panel

Fig.15Fig.14

1-7

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Removing the tuner pack (See Fig.16)

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

Tuner pack

Disconnect the card wire from connector CN1 on the tuner pack on the right side of the body.

Remove the two screws H on the back of the body.

Removing the fan (See Fig.17,18)

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

Disconnect the wire from connector CN711 on the microcomputer board on the right side of the body.

Remove the three screws I attaching the fan bracket on top of the body and release the joint d.

CN1

Fig.16

CN711

Remove the two screws J attaching the fan.

1-8

Fan bracket

Fig.17

Fig.18

Fan

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Removing the MD mechanism assembly

(See Fig.19~21)

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

Remove the two screws K attaching the DVD mechanism attaching bracket.

Remove the two screws L on each side of the MD mechanism assembly and remove the MD mechanism assembly toward the front.

Disconnect the card wire from connector CN521 on the MD mechanism assembly board.

MD mechanism assembly

DVD mechanism

Fig.19

DVD mechanism attaching bracket

attaching bracket

Removing the headphone board

(See Fig.22,23)

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

Disconnect the wire from connector CN310 on the main board on the left side of the body.

Release the wires from the two clamps on the bottom chassis.

Remove the screw M attaching the headphone board on the right side of the body.

Headphone board

Fig.20

MD mechanism assembly

CN521

Fig.21

Main board

CN310

Fig.22

Clamp

Headphone board

Fig.23

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Removing the main board

(See Fig.24,25)

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

Remove the two screws N and the three screws O. Remove the heat sink.

Disconnect the wires from connector CN307 and CN310, the card wire from CN312 on the main board on the left side of the body.

Remove the screw P and Q attaching the main board.

Main board

Heat sink

Disconnect connector CN303, CN304, CN305 and CN306 on the main board. Release the two joints e at the bottom.

Draw out the main board and disconnect the card wire and the wire from connector CN302 and CN311.

Removing the DVD relay board

(See Fig.26)

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

Disconnect the card wire from connector CN515 on the DVD relay board.

Main board

Heat sink

CN302

CN311

Main board

Fig.24

CN303 CN304

Fig.25

CN512

CN305

CN306

CN511

DVD connector board

CN312

CN307

CN310

Remove the screw R attaching the DVD relay board on top of the body.

Disconnect connector CN511 and CN512 on the DVD relay board.

1-10

CN515

Fig.26

Removing the MD base chassis/ microcomputer board (See Fig.27~29)

Prior to performing the following procedure, remove the metal cover, the DVD mechanism assembly, the front panel assembly, the rear cover/ rear panel, the main board and the DVD relay board.

MD mechanism assembly

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MD base chassis

REFERENCE:

Disconnect the wire from connector CN701 on the microcomputer board in the center of the right side of the body.

Remove the two screws S attaching the MD base chassis on top of the body.

Disconnect connector CN706 and CN707 on the microcomputer board from the main board.

REFERENCE:

Remove the two screws T attaching the microcomputer board and release the two joints f.

It is not necessary to remove the DVD mechanism assembly.

The MD base chassis with the MD mechanism assembly comes off.

Microcomputer board

CN701

Fig.27

MD mechanism assembly MD base chassis

CN706

CN707

CN706

CN707

Fan bracket

Main board

Fig.28

Microcomputer

board

Fig.29

1-11

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Removing the power transformer assembly (See Fig.30,31)

Prior to performing the following procedure, remove the metal cover, the DVD mechanism assembly, the front panel assembly, the rear cover/ rear panel, the main board and the MD base chassis.

Move the power cord stopper upward on the back of the body and remove. Disconnect the power cord from connector CN901 on the power transformer board.

REFERENCE:

Remove the four screws U on top of the body and release the wires from the two clamps on the bottom chassis.

The power cord can be removed alone.

Removing the power amplifier board

(See Fig.32,33)

Power transformer board

CN901

Power cord stopper

Power cord

Fig.30

Clamp

Power amplifier board

Bottom chassis

Prior to performing the following procedure, remove the metal cover, the DVD mechanism assembly, the front panel assembly, the rear cover/ rear panel, the main board and the MD base chassis.

Disconnect the wire from connector CN111 on the power amplifier board.

Remove the band attaching the wire to the power amplifier board.

Release the wires from the clamp.

Move the power amplifier board upward to release the two joints g and remove to the right.

Power transformer

assembly

Fig.31

Power amplifier

board

1-12

Band

Power amplifier board

CN111

Fig.32

Band

Clamp

Fig.33

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

Removing the cassette mechanism assembly (See Fig.34,35)

Remove the spring attached to the cassette door on the back of the front panel.

Remove the four screws V attaching the cassette mechanism assembly.

Cassette door

Spring

Fig.35

Spring

Cassette mechanism assembly

Fig.34

Front panel assembly

Removing the key board (See Fig.36~38)

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

Pull out the volume knob on the front side of the front panel.

Remove the five screws W attaching the bracket (1) on the back of the front panel.

Remove the ten screws X attaching the key board.

Bracket(1)

Volume knob

Fig.36

Key board

Front panel

Fig.38Fig.37

1-13

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Removing the FL connection board

(See Fig.39~41)

Remove the two screws Y and the screw Z attaching the bracket (2) on the back of the front panel.

Disconnect the card wire from connector CN441 on the FL connection board.

Push the two joint tabs h downward to release and pull out the FL connection board.

Removing the Drive motor assembly

(See Fig.39, 40,42)

Remove the two screws Y and the screw Z attaching the bracket (2) on the back of the front panel.

FL connection board

CN441

Bracket(2)

Fig.39

Front panel

Remove the screw A' attaching the drive motor assembly. Release the joint tab i and pull out the drive motor assembly.

CN441

Drive motor

Fig.40

Drive motor

1-14

FL connection board

Fig.42Fig.41

Removing the belt/ drive motor

(See Fig.43)

Prior to performing the following procedure, remove the drive motor assembly.

Remove the belt from the pulley

Remove the two screws B' attaching the drive motor.

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Belt

Drive motor

Fig.43

Removing the switch board

(See Fig.44,45)

Prior to performing the following procedure, remove the bracket (2) / drive motor assembly.

Disconnect the card wire from connector CN441 on the FL connection board(Do not fold down the card wire).

Release the joint j and k in order on the right and left sides of the shaft gear.

Remove the screw C' attaching the switch board and release the joint tab l.

FL connection board

Shaft gear

CN441

Fig.44

Switch board

Fig.45

1-15

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Removing the FL display section

(See Fig.46~51)

Remove the four screws D' attaching the case cover on the front panel.

Pull out the FL panel from the four joint bosses m on the FL display cover.

Remove the four screws E' attaching the FL display cover. Disconnect the card wire from connector CN451 on the FL relay board and from CN452 on the LED board.

Case cover

Fig.46

FL panel

FL display cover

Fig.47

FL connection board

CN451

Fig.49Fig.48

LED board

CN452

FL display cover

1-16

Remove the two screws F' attaching the FL display on the FL display cover.

The FL board and the lens come off from the FL display section.

FL display section

FL display cover

F' F'

Fig.50

FL display section

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Removing the FL relay board(See Fig.52)

Prior to performing the following procedure, remove the FL display cover.

Disconnect the card wire from connector CN453 on the FL relay board.

Remove the two screws G' attaching the FL relay board.

LED board

FL board

Fig.51

CN453

FL connection board

Fig.52

Lens

1-17

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Removing the clamper assembly

(See Fig.1)

Remove the four screws A attaching the clamper

1. assembly.

Move the clamper assembly in the direction of the

2. arrow to release the joint a on each side, and remove.

ATTENTION:

Removing the tray (See Fig.2,3)

Prior to performing the following procedure, remove the clamper assembly.

Push the part b of the slide cam through the slot on the left side of the loading base.

Draw out the tray toward the front.

ATTENTION:

When reassembling, reattach the clamper assembly at the two joints a.

When reattaching the tray, move the part c of the slide cam to the right(See Fig.3).

Loading base

Clamper

assembly

Fig.1

Tray

Fig.2

Removing the servo control board

(See Fig.4)

CAUTION:

Solder the connected to connector CN101 on the servo control board.

Disconnect the flexible wire from connector CN101 on the servo control board.

Disconnect the card wires from connector CN201 and CN202 on the servo control board.

Release the two joints d.

Move the servo control board in the direction of the arrow to release the joint e, and remove upward.

CAUTION:

Solder the sorting round point before disconnecting the flexible wire extending from the pickup. If you do not follow this instruction, the pickup may be damaged.

sorting round

Unsolder the sorting round point after reassembling.

point on the flexible wire

CN201

Servo control board

Slide cam

Fig.3

Sorting round point

CN101

Flexible wire

CN202

CN101

Fig.4

1-18

Removing the traverse mechanism assembly (See Fig.5,6)

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Prior to performing the following procedure, remove the clamper assembly, the tray and the servo control board.

Remove the four screws B attaching the traverse

1. mechanism assembly.

CAUTION:

When reassembling, get the flexible wire extending from the spindle motor board through the slot f of the elevator.

Removing the elevator (See Fig.7 and 8)

Prior to performing the following procedure, remove the clamper assembly, the tray, the servo control board and the traverse mechanism assembly.

Pull the two tabs g outward and release the two shafts of the elevator.

Traverse mechanism

assembly

Fig.5

Traverse mechanism

assembly

ATTENTION:

Tab g

When reassembling, fit the two shafts on the front side of the elevator into the grooves h of the slide cam.

Elevator

Fig.6

Shaft

Elevator

Slide cam

Loading base

Elevator

Fig.7 Fig.8

Tab g

1-19

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Removing the motor assembly

(See Fig.9,10)

Prior to performing the following procedure, remove the clamper assembly, the tray, the servo control board, the traverse mechanism assembly and the elevator.

Remove the belt from the pulley.

Remove the screw C attaching the loading motor.

Remove the screw D attaching the motor board on

3. the back of the loading assembly.

Release the tab i fixing the motor board and remove

4. the motor assembly.

Belt

Loading motor pulley

Fig.9

Ta b i

Motor assembly

Motor board

Fig.10

Loading assembly

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Pulley gear bracket

Pulley gear

Motor assembly

Pulley gear bracket

Idle gear

Fig.11

Idle gear

Pulley gear

Middle gear

Tab j

Removing the idle gear/ pulley gear/ middle gear/ slide cam (See Fig.11~13)

Prior to performing the following the procedures, remove the clamper assembly, the tray, the servo control board, the traverse mechanism assembly, the elevator and the motor assembly.

Push the two tabs j attaching the idle gear inward

1. and pull out the idle gear.

Remove the screw E attaching the pulley gear

2. bracket. Move the pulley gear bracket in the direction of the arrow and remove upward.

Pull out the pulley gear.

Move the slide cam in the direction of the arrow to

4. release the two joints k and remove upward.

Remove the middle gear.

Slide cam

Fig.12

Middle gear

Fig.13

Loading base

1-21

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Removing the feed motor assembly

(See Fig.14)

Unsolder the two soldering l on the spindle motor

1. board.

Remove the two screws F attaching the feed motor

2. assembly.

Removing the feed motor

(See Fig.14~16)

Prior to performing the following procedure, remove the feed motor assembly.

Remove the screw G and the spring.

CAUTION:

Remove the feed gear M.

When reassembling, attach the spring correctly to press the feed gear M and E.

Feed motor assembly

Spindle motor board

Pickup

Spindle motor

Fig.14

Feed gear M

Spring

Pull out the feed gear E and the lead screw.

Remove the two screws H and the feed motor.

CAUTION:

When reassembling, set the two wires extending from the feed motor to the notch m of the feed holder as shown in Fig.14.

Lead screw

Feed gear E

Fig.15

Feed motor

1-22

Feed motor

Fig.16

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Removing the pickup (See Fig.17,18)

Prior to performing the following procedure, remove the feed motor assembly.

Remove the screw l, the T spring(S) and the shaft holder with the plate.

ATTENTION:

Detach the part n of the shaft upward and move the part o in the direction of the arrow, then remove the shaft from the spindle base.

Release the joint p in the direction of the arrow.

Pull out the shaft from the pickup.

Remove the two screws J attaching the actuator.

Release the joint of the actuator and the lead spring, and pull out the lead spring.

When reassembling, reattach the T spring (s) correctly to press the shaft

Plate

T spring(S)

Lead spring

Actuator

Pickup

Fig.17

Spindle base

Shaft holder

Actuator

Lead spring

ATTENTION:

When reattaching the pickup, attach the spring under the shaft(See the figure below).

Pickup

Spring

Shaft

Removing the shaft holder/ shaft

(SeeFig.19)

Prior to performing the following procedure, remove the feed motor assembly and the pickup.

Pickup

Shaft

Fig.18

Shaft

Shaft holder

Remove the screw K attaching the shaft holder.

Remove the shaft.

Fig.19

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Removing the spindle motor assembly

(See Fig.20~22)

Prior to performing the following procedure, remove the feed motor assembly, the pickup, the shaft and the shaft holder.

Turn over the mechanism base and remove the three screws l attaching the spindle motor assembly.

ATTENTION:

Remove the three screws M and the spindle base.

When reassembling, set the card wire extending from the spindle motor board to the notch of the spindle base.

Spindle motor assembly

Spindle motor board

Spindle motor

Fig.20

Spindle base

Fig.21

Mechanism base

Fig.22

1-24

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Removing the main board (See Fig.1, 2)

CAUTION:

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

Remove the two screws A attaching the main board. Move the main board in the direction of the arrow to release the two joints a .

Solder the sorting round point to protect the pickup. Disconnect the flexible wire from connector CN321 on the back of the main board.

CAUTION:

When replacing the flexible wire connected to the main board, solder the shorting round point. Otherwise, the pickup may be damaged. (see Fig.18)

When reassembling, connect the flexible wire from the pickup to the main board and unsolder the shorting round point.

CN408

CN407

Joint a Joint a

Fig.1

Main board

C451

Main board

CN321

Removing the mechanism cover (See Fig.3)

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

Remove the one screw C on the upper side of the body.

Move the mechanism cover toward the front to release the front hook from the loading assembly (joint b ) , then remove upward.

Hook

Pickup

Joint b

Fig.2

Flexible wire

Sorting round

point

Mechanism cover

Joint c

Fig.3

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

Removing the spring from the hook on the main body. Remove the spring from the head lifter if necessary.

Turn the head lifter in the direction of the arrow to release the joint c and d .

Joint c

Head lifter

Fig.4

Spring

Head lifter

Joint d

Fig.5

Head lifter

Removing the head assembly (See Fig.7)

Spring

Fig.6

࡮

Prior to performing the following procedure, remove

the main board.

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

1-26

Head assembly

Fig.7

Removing the loading assembly (See Fig.8, 9)

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REFERENCE:

࡮

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

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

Move the loading assembly toward the front to release the joint e and remove upward.

Remove the traverse mechanism assembly from the single flame.

The traverse mechanism assembly and the single flame can be removed after removing the loading assembly from the body.

Loading assembly

Joint e

Fig.8

Loading assembly

Traverse mechanism assembly

Single frame

Fig.9

1-27

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Removing the slide base (L) and (R)

(See Fig.10)

Remove the two screws F on the upper side of the loading base assembly.

Remove the slide base (L) outward while releasing the two joints f on the bottom.

Remove the slide base (R) outward.

Removing the loading mechanism assembly

(See Fig.11)

To release the loading mechanism assembly from the bending g without trouble, first bring up the one side of the loading mechanism assembly opposite to the bending g and release the side bosses from the loading mechanism base. And next, remove another side.

Slide base(R)

Bending g

Loading mechanism assembly

Joint f

Slide base(L)

Joint f

Fig.10

Loading mechanism base

Fig.11

Loading mechanism assembly section

Removing the loading motor (See Fig.12, 13)

Release the harness from the wire holder on the cam switch board and disconnect from connector t.

Remove the screw G and release the joint h .

Remove the belt from the loading motor assembly.

Remove the two screws H .

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

Remove the slit washer and pull out the cam gear.

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

Loading motor assembly

Joint h

CN612

Fig.12

Wire holder

Cam switch board

Slit washer

Cam gear

Loading motor

Remove the two screws I , the clamp and the cam switch board.

1-28

Belt

Fig.13

Remove the cartridge holder assembly (See Fig.14, 15)

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

Eject bar

Removing the slide bar/Eject bar (See Fig.14, 15)

Slide bar

Cartridge holder assembly

Eject bar

Tab i

Fig.14

࡮

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

Remove the slide bar upward.

Move the slide bar outward until it stops (See Fig.14). Push the tab i from below and remove the eject bar from the chassis section.

Slide bar

boss m

Eject bar

UD base

Cartridge holder assembly

Fig.15

1-29

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Removing the insulator (See Fig.16)

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

Removing the pickup unit (See Fig.17)

Remove the screw K attaching the shaft holder (F) on the back of the traverse mechanism assembly.

Move the shaft inward and release from the shaft holder (R).

Insulator

Pickup unit

Insulator

Traverse mechanism chassis

Fig.16

Joint j Pickup guide

Pickup unit

Bring up the one side of the pickup unit on the shaft to release the joint j on the opposite side. Then, remove the pickup unit with the shaft.

Removing the pickup (See Fig.18)

Pull out the shaft from the pickup.

Remove the two screws L attaching the rack spring to the pickup.

CAUTION:

Before disconnecting the flexible wire connected to the pickup, solder the shorting round point to protect the pickup from static electricity.

Shaft holder(F)

Shaft holder(R)

Fig.17

Rack spring

Pickup

1-30

Shaft

Fig.18

+ 93 hidden pages

JVC UXA-10 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual