JVC XVS-300-BK, XVS-302-SL Service manual

XV-S300BK/XV-S302SL

SERVICE MANUAL

DVD VIDEO PLAYER

XV-S300BK / XV-S302SL

Area Suffix

B --------------------------- U.K. E ----- Continental europe EN ------ Northern europe EV ------- Eastern Europe EE -- Russian Federation

STANDBY/ON

OPEN/ CLOSE

123

456

789

10 0+10

RETURN

CANCEL

ENTER

PHONIC

CLEAR SELECT STROBE

SLOW-SLOW

PLAY

SUB TITLE

AUDIO

MODE

DIGEST ANGLE ZOOM

RM-SXV001A

REMOTE CONTROL

THEATER POSITION

STANDBY

DOLBY

STANDBY/ON

D I G I T A L

DVD/SUPER VCD/VCD/CD PLAYER

Each difference point

Model Body color

XV-S300BK XV-S302SL

Contents

Safety precautions ------------------------ 1-2 Preventing static electricity ------------- 1-3 Precautions for service ------------------ 1-4 Important for laser products ------------ 1-5 Disassembly method --------------------- 1-6

SKIP

OPEN/CLOSE

PAUSEPLAYSTOP

Black Silver

Adjustment method ----------------------- 1-15 Attention when pick-up is exchanged - 1-19 Comfirm method of operation ---------- 1-20 Troubleshooting --------------------------- 1-21 Description of major ICs ----------------- 1-25

This service manual is printed on 100% recycled paper.

No.A0029 Apr. 2002

XV-S300BK/XV-S302SL

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 manufacturers 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 reassembling.

5. Leakage current check (Electrical shock hazard testing) After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

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

XV-S300BK/XV-S302SL

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 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

1-3

XV-S300BK/XV-S302SL

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. To replace the traverse unit, pull out the metal short pin for protection from charging.

5. 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.

6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block. Do not change the setting of these half-fixed resistors for laser power adjustment.

Destruction of Traverse Unit and Laser Pickup by Static Electricity

Laser diodes are easily destroyed by static electricity charged on clothing or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection:

1. Wear an antistatic wrist wrap.

2. With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate.

3. After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.

4. Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.

Please refer to "Fig.4" of "Disassembly method" for details.

Short circuit

CN101

1-4

Servo control

board

Important for laser products

XV-S300BK/XV-S302SL

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are 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 LABEL and PRINT

WARNING LABEL and PRINT

CAUTION: Invisible laser

radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e)

VARNING: Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen. (s)

CLASS 1 LASER PRODUCT

ADVARSEL: Usynlig laser-

stråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling (d)

VARO: Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen. (f)

1-5

XV-S300BK/XV-S302SL

Disassembly method

Removing the top cover (see Fig.1)

Remove the two screws A attaching the top cover on both sides of the body.

Remove the three screws B attaching the top cover on the back of the body.

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

ATTENTION: Do not break the front panel tab fitted to the top cover.

Removing the mechanism assembly (see Fig.2,3)

Prior to performing the following procedure, remove

the top cover. There is no need to remove the front panel assembly.

Remove the three screws C attaching the mechanism

1. assembly on the bottom chassis.

Remove the two screws D attaching the lug wire and

2. main board on the main board.

The servo control board is removed from the

3. connector CN961 and CN701 connected with the main board respectively.

CN702

A x 2

Lug wire

Main board

Servo control board

Fig.1

Mechanism assembly

Fig.2

Mechanism

assembly

CN703

Remove the mechanism assembly by lifting the rear

4. part of the mechanism assembly.

Removing the servo control board (see Fig.4)

Prior to performing the following procedure, remove

the top cover and mechanism assembly.

Disconnect the card wire from connector CN201 and

1. CN202 on the servo control board respectively.

Disconnect the flexible wire from connector CN101 on

2. the servo control board from pick-up.

< ATTENTION > At this time, please extract the wire after short-circuited of two places on the wire in part a with solder. Please remove the solder two places of part a after connecting the wire with CN101 when reassembling.

Two places in hook b are removed, the servo control

3. board is lifted, and it is removed.

Main board

Hook b

CN201

CN101

CN701

Fig.3

Fig.4

CN961

Part a

Hook b

CN202

Servo control board

1-6

Removing the rear panel (see Fig.5)

XV-S300BK/XV-S302SL

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

1.Remove the eight screws E attaching the rear panel on the back of the body.

Removing the front panel assembly (see Fig.6,7)

* Prior to performing the following procedure, remove the top cover. * There is no need to remove the mechanism assembly.

1.Remove the one screw F attaching the front panel assembly on the bottom chassis.

2.Disconnect the wire from CN702 and CN703 on the main board respectively.

3.Hook c and d are removed respectively, and the front panel assembly is removed.

Front panel

assembly

Hook d

Rear panel

Fig.5

Hook c

Mechanism assembly

Hook d

Fig.6

CN703

Removing the main board (see Fig.8)

* Prior to performing the following procedure, remove the top cover, mechanism assembly and rear panel.

1.Disconnect the wire from CN702 and CN703 on the main board respectively.

2.Remove the four screws G attaching the main board on the bottom chassis.

CN702

Main board

CN702

Main board

Fig.7

CN703

Fig.8

1-7

XV-S300BK/XV-S302SL

Removing the clamper assembly

(See Fig.1)

Remove the four screws A attaching the clamper assembly.

Move the clamper in the direction of the arrow to release the two joints a on both sides.

ATTENTION:

When reattaching, fit the clamper to the two joints a.

Removing the tray (See Fig.2 and 3)

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

Push b of the slide cam into the slot on the left side of the loading base until it stops.

Draw out the tray toward the front.

Joint a

Fig.1

ATTENTION:

Before reattaching the tray, slide the part c of the slide cam to the right as shown in Fig.3.

Clamper base

Push

Tray

Fig.2

Part c

Slide cam

Fig.3

1-8

Removing the traverse mechanism assembly (See Fig.4 and 5)

XV-S300BK/XV-S302SL

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

Remove the four screws B attaching the traverse mechanism assembly.

ATTENTION:

Before reattaching the traverse mechanism assembly, pass the card wire extending from the spindle motor board through the notch d of the elevator.

Removing the elevator (See Fig.6 and 7)

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

Extend each bar e inside of the loading base outward and detach the elevator shaft.

Traverse mechanism assembly

Fig.4

Traverse mechanism assembly

Elevator

Notch d

ATTENTION:

Elevator

When reattaching, first fit the two shafts on the front of the elevator to the slots f of the slide cam.

Shafts

Slide cam

Elevator

Fig.5

Elevator

Loading base

Slots f

Fig.6Fig.7

1-9

XV-S300BK/XV-S302SL

Removing the motor assembly

(See Fig.8 and 9)

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

Remove the belt from the pulley.

Remove the screw C attaching the motor assembly.

Turn over the body and remove the screw D attaching the motor assembly.

Release the two tabs g retaining the motor board.

Belt

Motor assembly

Fig.8

Tabs g

Motor assembly

Loading base

Fig.9

1-10

XV-S300BK/XV-S302SL

Pulley gear

Pulley gear bracket

Motor assembly

Pulley gear bracket

Idle gear

Fig.10

Idle gear

Pulley gear

Tads h

Pulley gear

Removing the Idle gear / pulley gear / middle gear / slide cam (See Fig.10 to 12)

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

Press the two tabs h inward and pull out the idle gear.

Remove the screw E attaching the pulley gear bracket. Slide the pulley gear bracket in the direction of the arrow and pull out the pulley gear.

Slide the slide cam in the direction of the arrow to release the two joints i and remove upward.

Remove the middle gear.

Slide cam

Joint i

Slide cam

Middle gear

Joint i

Fig.11

Middle gear

Fig.12

Loading base

1-11

XV-S300BK/XV-S302SL

Removing the feed motor assembly

(See Fig.13)

Unsolder the two soldering j on the spindle motor board.

Remove the two screws F attaching the feed motor assembly.

Removing the feed motor

(See Fig.13 to 15)

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

Remove the screw G attaching the thrust spring.

Feed motor assembly

Notch k

Soldering j

Spindle motor board

Pickup

Spindle motor

Fig.13

Feed gear (M)

Thrust spring

ATTENTION:

Remove the feed gear (M).

Pull out the feed gear (E) and the lead screw.

Remove the two screws H attaching the feed motor.

ATTENTION:

When reattaching the thrust spring, make sure that the thrust spring presses the feed gear (M) and the feed gear (E) reasonably.

When reattaching, pass the two cables extending from the feed motor through the notch k of the feed holder as shown in Fig.13.

Lead screw

Feed gear (E)

Fig.14

Feed motor

1-12

Feed holder

Fig.15

XV-S300BK/XV-S302SL

Removing the pickup (See Fig.16 and 17)

Remove the screw I attaching the T spring (S) and the shaft holder. Remove also the plate.

ATTENTION:

Pull out the part l of the shaft upward. Move the part m in the direction of the arrow and detach from the spindle base.

Disengage the joint n of the pickup and the shaft in the direction of the arrow.

Pull out the shaft from the pickup.

Remove the two screws J attaching the actuator.

Disengage the joint of the actuator and the lead spring. Pull out the lead spring.

When reattaching, make sure that the T spring (S) presses the shaft.

Shaft holder

Plate

T spring (S)

Lead spring

Pickup

Joint n

Part m

Part l

Fig.16

Actuator

Lead spring

Shaft

Spring

The spring must be under the shaft when you install pick-up.

Removing the shaft holder / shaft

(See Fig.18)

Remove the screw K attaching the shaft holder.

Remove the shaft.

Pick-up

Pickup

Shaft

Fig.17

Shaft

Shaft holder

Fig.18

1-13

XV-S300BK/XV-S302SL

Removing the spindle motor assembly

(See Fig.19 to 21)

Remove the three screws L attaching the spindle motor on the bottom of the mechanism base.

ATTENTION:

Remove the three screws M attaching the spindle base.

When reattaching, pass the card wire extending from the spindle motor board through the notch of the spindle base.

Spindle motor assembly

Spindle motor

Fig.19

Spindle base

Fig.20

Spindle base

Mechanism base

Fig.21

1-14

XV-S300BK/XV-S302SL

Adjustment method

(1) Initialization method

If microprocessor (IC401,IC402,IC451,IC504) or pick-up is replaces, initialize the DVD player in the following matter

1)Take out the disc and close the tray.

2)Unplug the power plug.

3)Insert power plug into outlet while pressing both "PLAY" button and "OPEN/CLOSE" button.

4)FL Display indicate "TEST " . :Version, :Region code

5)Press "3D-PHONIC" button of remote controller. and EEPROM initialize start.

6)When indicate "DTS" on the display, initialize finishes.

7)The power is turned OFF, and Unplug the power plug.

(2) Display of "Laser current value" and "Jitter value"

"Laser current value" and "Jitter value" are displayed on the FL display by the undermentioned method. Please refer to the failure diagnosis.

1)Take out the disc and close the tray.

2)Unplug the power plug.

3)Insert power plug into outlet while pressing both "PLAY" button and "OPEN/CLOSE" button.

4)FL Display indicate "TEST " . :Version, :Region code

5)Press the "OPEN/CLOSE" button to move the tray outward. Put the test disc (VT-501) on the tray and press "OPEN/CLOSE" button. The tray should move inward (Note:Don't push to close the tray directly by hand etc.)

6)Press the "PLAY" button.

7)After a few seconds, The laser current value and the jitter value is displayed on the FL indicator as follows.

FL Display

* The test mode is canceled when

0 0 3 5 1 8 B 6

the power is turned off.

Laser current value Jitter value

For Laser current value

The laser current value becomes 35mA for the above-mentioned. Becomes a test mode by doing above-mentioned procedure 1) - 4). Afterwards, the laser current value can be switched by pushing the button to remote controller without turning on the disk.

Remote control "4" button --- Laser of CD Remote control "5" button --- Laser of DVD

It can be judged it is simply good if the displayed current value of the laser is smaller than that of the undermentioned value. Moreover, there must be a deteriorated possibility and the pick-up must exchange the pick-up more than the undermentioned value.

Laser current value of CD ------ 49 mA or less Laser current value of DVD ---- 64 mA or less

STANDBY/ON OPEN/ CLOSE

123

456

789

10 0+10

RETURN

ENTER

CLEAR SELECT STROBE

SLOW-SLOW

PLAY

SUB TITLE

AUDIO

MODE

PHONIC

DIGEST ANGLE ZOOM

RM-SXV001A

REMOTE CONTROL

CANCEL

THEATER

POSITION

5 Button

(Laser of DVD)

4 Button

(Laser of CD)

3D PHONIC

Button (Initialize start)

POWER Button

*Returns to a usual test mode by the thing to push the "STOP" button of remote controller.

DTS Display part (Initialize complete)

FL Display

STANDBY/ON

STANDBY

DOLBY

D I G I T A L

DVD/SUPER VCD/VCD/CD PLAYER

OPEN/CLOSE

Button(Test mode)

(Test mode & display of jitter)

OPEN/CLOSE

PLAY Button

SKIP

PAUSEPLAYSTOP

1-15

XV-S300BK/XV-S302SL

For Jitter value

The jitter value is displayed on the FL display referring to the previous page. The jitter value is displayed by the hexadecimal number. In the following cases, please "Flap adjustment of the pick-up guide shaft" referring to the following page. Before using the TEST disc VT-501, careful check it if there is neither damage nor dirt on the read surface.

< In the following cases, please adjustment >

* When you exchange the pick-up * When you exchange the spindle motor * When the reading accuracy of the signal is bad (There is a block noise in the screen etc..)

STANDBY/ON

OPEN/ CLOSE

123

456

789

10 0+10

RETURN

ENTER

CLEAR SELECT STROBE

SLOW-SLOW

PLAY

SUB TITLE

AUDIO

MODE

PHONIC

DIGEST ANGLE ZOOM

RM-SXV001A

REMOTE CONTROL

(Laser of DVD)

CANCEL

THEATER POSITION

(Laser of CD)

3D PHONIC

Button (Initialize start)

5 Button

4 Button

DTS Display part (Initialize complete)

POWER Button

STANDBY

STANDBY/ON

D I G I T A L

OPEN/CLOSE

Button(Test mode)

FL Display

DOLBY

DVD/SUPER VCD/VCD/CD PLAYER

OPEN/CLOSE

PLAY Button

(Test mode & display of jitter)

SKIP

PAUSEPLAYSTOP

1-16

(3) Flap adjustment of the pick-up guide shaft

* Hex wrench for adjustment

Off-the-shelf (1.3mm)

* Test disc

VT-501 or VT-502

* Stud (four pieces set)

Parts No. : JIGXVS40 (One is not used though there are four. )

* Assistance board and extension cord

Parts No. : EXTXVS40MK2CB

EXTXVS40MK2CB-1 MAIN CONNECT

Parts No. : EXTXVS40CB

EXTXVS40MK2CB-2 CONTROL CONNECT

XV-S40

MAIN CONNECT

XV-S300BK/XV-S302SL

Parts No. : EXTXV521CB

XV-521 CN601

MAIN CONNECT

XV-521 CN503

CONT CONNECT

To CN701 of main board

EXTXVS40MK2CB-1 MAIN CONNECT

XV-S40 CONTROL CONNECT

CN701 XV-521

XV-521 CN502

CONT CONNECT

MAIN CONNECT

CN706 XV-521

CN501 XV-521

CONT CONNECT

To CN961 of main board

MAIN CONNECT

These parts are not used.

XV-521 CN601

EXTXVS40MK2CB-2 CONTROL CONNECT

To CN503 of servo control board

CONT CONNECT

XV-521 CN503

To CN502 of servo control board

1-17

XV-S300BK/XV-S302SL

1.The mechanism assembly is made in the state from the main body from which is detached referring to the disassembly method.

2.Three studs are installed in the mechanism assembly respectively.

3.The servo control board is removed from the mechanism assembly, and puts into the state set up as shown in figure. (Each wire connected by the servo control board this time leaves the connection maintained.) Between shaft and hook of mechanism assembly of figure Board is put.

4.The extension cord is inserted in the connector of the assistance board respectively. The main board is connected with the servo control board as shown in figure.

Mechanism

assembly

Extension

cord

Stud

Main board

Servo control board

Assistance

board

Extension

cord

Shaft & hook

Stud

Assistance

board

Assistance

board

Extension

cord

Shaft & hook

Assistance

board

Servo control board

Extension

cord

Assistance

board

1.Puts into the state to display the jitter value on the FL display referring to "Display of the jitter value".

2.The adjustment screw under the traverse mechanism is turned with hex wrench, and matches so that the jitter value displayed on the FL display may become "maximum" value.

1-18

Adjustment screw a Adjustment screw b

Adjustment screw c

<POINT>

1.Turns in the forward or the opposite direction, and makes to the position where the jitter value is good the half rotation of adjustment screw a and b(180 degrees) respectively.

2.Afterwards, adjustment screw b and c are turned in the same way, and makes to the best position.

Attention when pick-up is exchanged

1.Flexible wire, pick-up spring, switch actuator, and lead spring are removed from an old pick-up (broken the one).

XV-S300BK/XV-S302SL

Switch actuator

Lead spring

< Guide > Flexible wire, pick-up spring and switch actuator, lead spring are removed without each decomposing while assembled.

2.The above-mentioned parts are installed in a new pick-up (non-defective article).

3.A flexible wire is inserted in the connector which has taken side with the pick-up, and solder is put up to short land part "a" two places on a flexible wire.

4.The electrostatic breakdown protection circuit attached to the pick-up is cut.

< ATTENTION > Please cut the electrostatic breakdown protection circuit

attached to the pick-up after solder is put up to two places on a flexible wire short land part "a" of the insertion of a flexible wire this time in the connector without fail. The procedure might be mistaken and if solder has not surely adhered to two places on a flexible wire short land part "a", the laser diode in the pick-up be destroyed again.

Pick-up

Pick-up spring

Flexible wire

Electrostatic breakdown

protection circuit

Flexible wire

Connector

5.The pick-up is installed in the traverse mechanism.

6.A flexible wire is connected with connector CN101 on the servo control board by installing the traverse mechanism in the loading mechanism.

7.Solder in two places on a flexible wire in part "a" is removed.

< ATTENTION > Please remove solder in two places in part "a" after

connecting a flexible wire with connector CN101 on the servo control board without fail this time. When the procedure is mistaken, the laser diode in the pick-up might be destroyed. Please remove solder in two places in part "a" surely.

Short land part "a"

Cutting part

Electrostatic breakdown

protection circuit

Short land

part "a"

CN101

Servo control

board

1-19

XV-S300BK/XV-S302SL

Confirm method of operation

Please confirm the operation of the undermentioned item after doing the repair and the upgrade of the firmware.

The EEPROM is initialized.

Refer to the initialization method.

Opening picture check (Power ON)

It should be display "JVC"

Muting working

The noise must not be had to the performance beginning when you push "PLAY" button or at ON/STANDBY.

FL Display

The mark and the logo, etc. displayed by each operation must be displayed correctly. FL Display should light correctly without any unevenness.

All Function button

All function buttons should worked correctly with moderate click feeling.

Open and close movement of tray

When press OPEN/CLOSE button the tray should move smoothly without any noise.

Remote controller unit working

Check the correctly operation in use of remote controller unit.

Reading of TOC

Be not long in the malfunction.

Both forward-searches and backward-searches should be able to be done. Do not stop be searching or after the search.

Skip

Both forward-skip and backward-skip should be able to be done. Do not stop be after the skip.

Playback

Do not find abnormality etc. of tone quality and the picture quality.

Most outside TITLE playback check

Play VT-501 TITLE 59 CHAPTER 1 , check normal playback.

1-20

Troubleshooting

Servo volume

Press OPEN /CLOSE key

XV-S300BK/XV-S302SL

Is tray

operation

Confirmation of tray drive circuit

and circuit in surrounding

correct?

Is the traverse moving along the innermost

perimeter for SW detection?

"NO DISC" message appears

immediately after vertical movement of the pick-up lens

The state that DISC does not rotate continues for several seconds, and becomes NO DISC or an error display afterwards. The rotation of DISC becomes high-speed and abnormal, and becomes NO DISC or an error display afterwards.

Is focus retraction OK?

OFF Even when it retracts correctly, if it is out of focus and makes repeated retries with a clicking sound, it is in error.

See "(4) Focus ON error"

in "Check points for individual errors"

Is tracking retraction OK?

See "(3) Traverse movement error" in "Check points for individual errors"

See "(2) Disk detection, distinction error" in "Check points for individual errors"

See "(1) Spindle startup error" in "Check points for individual errors"

Is the inter-layer jump OK?

LO LI

Two layers of DVD only.

(8) Inter-layer

jump error

OFF

If TE waveform reappears or fails to converge after the TE retraction, it is in error.

Is the spindle servo

locked correctly?

Is the RF OUT waveform

locked correctly?

See "(5) Tracking ON error"

in "Check points for individual errors"

See "(6) Spindle CLV error"

in "Check points for individual errors"

Has the disc information

been collected?

Stop will result

Is playback

possible?

OK !

(7) Address read

error

Check (9),(10),(11), and (12) items in "Check points for individual errors"

1-21

XV-S300BK/XV-S302SL

Check points for each error

(1) Spindle start error

1.Defective spindle motor

*Are there several ohms resistance between each pin of CN201 "5-6","6-7","5-7"? (The power supply is turned off and measured.)

*Is the sign wave of about 100mVp-p in the voltage had from each terminal? [ CN201"9"(H1-),"10"(H1+),"11"(H2-),"12"(H2+),"13"(H3-),"14"(H3+) ]

2.Defective spindle motor driver (IC251)

*Has motor drive voltage of a sine wave or a rectangular wave gone out to each terminal(SM1~3) of CN201"5,6,7" and IC251"2,4,7"?

*Is FG pulse output from the terminal of IC251"24"(FG) according to the rotation of the motor?

*Is it "L(about 0.9V)" while terminal of IC251"15"(VH) is rotating the motor?

3.Has the control signal come from servo IC or the microcomputer?

*Is it "L" while the terminal of IC251"18"(SBRK) is operating? Is it "H" while the terminal of IC251"23"(/SPMUTE) is operating?

*Is the control signal input to the terminal of IC251"22"(EC)? (changes from VHALF voltage while the motor is working.)

*Is the VHALF voltage input to the terminal of IC251"21"(ECR)?

4.Is the FG signal input to the servo IC?

*Is FG pulse input to the terminal of IC301"69"(FG) according to the rotation of the motor?

(2) Disc Detection, Distinction error (no disc, no RFENV)

* Laser is defective. * Front End Processor is defective (IC101). * APC circuit is defective. --- Q101,Q102. * Pattern is defective. --- Lines for CN101 - All patterns which relate to pick-up and patterns between IC101 * IC101 --- For signal from IC101 to IC301, is signal output from IC101 "20" (ASOUT) and IC101 "41"(RFENV) and IC101 "22" (FEOUT)?

1-22

(3) Traverse movement NG

1.Defective traverse driver *Has the voltage come between terminal of CN101 "1" and "2" ?

2.Defective BTL driver (IC201) *Has the motor drive voltage gone out to IC201"17" or "18"?

3.Has the control signal come from servo IC or the microcomputer? *Is it "H" while the terminal of IC201"9"(STBY1) ? *TRSDRV Is the signal input? (IC301 "67")

4.TRVSW is the signal input from microcomputer? (IC401 "46")

(4) Focus ON NG

* Is FE output ? --- Pattern, IC101 * Is FODRV signal sent ? (R209) --- Pattern, IC301 "115" * Is driving voltage sent ?

IC201 "13", "14" --- If NG, pattern, driver, mechanical unit .

* Mechanical unit is defective.

(5) Tracking ON NG

XV-S300BK/XV-S302SL

* When the tracking loop cannot be drawn in, TE shape of waves does not settle. * Mechanical unit is defective.

Because the self adjustment cannot be normally adjusted, the thing which cannot be normally drawn in is thought. * Periphery of driver (IC201)

Constant or IC it self is defective. * Servo IC (IC301)

When improperly adjusted due to defective IC.

(6) Spindle CLV NG

* IC101 -- "35"(RF OUT), "30"(ARF-), "31(ARF+). * Does not the input or the output of driver's spindle signal do the grip? * Has the tracking been turned on? * Spindle motor and driver is defective. * Additionally, "IC101 and IC301" and "Mechanism is defective(jitter)", etc. are thought.

(7) Address read NG

* Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.

Mechanism is defective. (jitter)

IC301, IC401.

The disc is dirty or the wound has adhered.

(8) Between layers jump NG (double-layer disc only)

Mechanism defective Defect of driver's IC(IC201) Defect of servo control IC(IC301)

1-23

+ 52 hidden pages

JVC XVS-300-BK, XVS-302-SL Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preventing static electricity

Precautions for service

Important for laser products

Disassembly method

Adjustment method

Attention when pick-up is exchanged

Confirm method of operation

Troubleshooting