JVC XVN-510-B Service manual

SERVICE MANUAL

DVD AUDIO/VIDEO PLAYER

YD01620048

XV-N510B,XV-N512S

Area Suffix

J ------------------------ U.S.A. C --------------------- Canada

TV DVD

STANDBY/ON

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

010 +10

TITLE

TV/VIDEO

/GROUP

CANCELRETURN PAGE

CH+

VOL VOL+

ENTER

NEXTPREVIOUS

SELECTCLEAR

SLOW+

SLOW

3D PHONIC

VFPZOOM

PROGRESSIVE

SCAN

SUB TITLE

ANGLE

AUDIO

fs/Rate

AMP VOL

REPEAT

DIMMER

XV-N510BJC, XV-N510BCC, XV-N512SJC, XV-N512SCC

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

No.YD016

2004/8

SPECIFICATION

XV-N510B,XV-N512S for J,C

General

Readable discs DVD AUDIO, DVD VIDEO, DVD-R (Video format), DVD-RW (Video format/VR format), DVD-RAM (VR

format), SVCD, Video CD, Audio CD (CD-DA), CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format, JPEG)

Video format REMOTE, 480i (Interlaced scan)/480p (Progressive scan) selectable

Other

Power requirements AC 120 V~, 60 Hz Power consumption 13 W (POWER ON), 2.0 W (STANDBY mode) Mass 1.9 k g (4.2 lbs)

Dimensions (W × H × D) 435 mm× 44 mm × 258.6 mm ((17-3/16 inch × 1-3/4 inch × 10-3/16 inch)

Video outputs

COMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 Ω)

PB/PR Output: 0.7 Vp-p (75 Ω) VIDEO OUT (pin jack) 1.0 Vp-p (75 Ω) S-VIDEO OUT (S jack) Y Output: 1.0 Vp-p (75 Ω)

C Output: 286 mVp-p (75 Ω)

Horizontal resolution 500 lines or more

Audio outputs

ANALOG OUT (pin jack) 2.0 Vrms (10 kΩ) DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 Ω termination)

DIGITAL OUT (OPTICAL) -21 dBm to -15 dBm (peak)

Audio characteristics

Frequency response CD (sampling frequency 44.1 kHz):2 Hz to 20 kHz

DVD (sampling frequency 48 kHz):2 Hz to 22 kHz

(4 Hz to 20 kHz for DTS and Dolby Digital bitstream signals)

DVD (sampling frequency 96 kHz):2 Hz to 44 kHz

DVD (sampling frequency 192 kHz/176.4 kHz):2 Hz to 88 kHz Dynamic range 16 bit: More than 98 dB

20 bit/24 bit: More than 106 dB Wow and flutter Unmeasurable (less than +- 0.002%) Total harmonic distortion 16 bit: less than 0.006%

20 bit/24 bit: less than 0.005%

* Notes for PX model (Check the specification indication on the rear panel.)

Power requirements AC 110 V to 240 V , 50 Hz/60 Hz Power consumption 13 W (POWER ON), 2.0 W(STANDBY mode)

• Manufactured under license from Dolby Laboratories. “Dolby”,”MLP Lossless and the double-D symbol are trademarks of Dolby Laboratories.

• “DTS” and “DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc.

• This product incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights. Use of this copyright protection technology must be authorized by Macrovision, and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision. Reverse engineering or disassembly is prohibited.

Digital output signal chart

Disc type

DVD with 48/44.1 kHz, 16/20/24 bit linear PCM DVD AUDIO with MLP

DVD with 192/176.4/96/88.2 kHz, 16/22/24 bit linear PCM DVD AUDIO with MLP

DVD with DTS 48 kHz, 16 bit, stereo linear PCM DTS bitstream DVD with Dolby Digital 48 kHz, 16 bit, stereo linear PCM Dolby Digital bitstream SVCD/Video CD/Audio CD 44.1 kHz, 16 bit, stereo linear PCM Audio CD with DTS 44.1kHz, 16 bit, stereo linear PCM DTS bitstream CD-R/RW with MP3/WMA Linear PCM

PCM ONLY DOLBY DIGITAL/PCM STREAM/PCM

48/44.1 kHz, 16/20/24 bit, stereo linear PCM

48/44.1 kHz, 16/20/24 bit, stereo linear PCM (Down sampling)

Output

1-2 (No.YD016)

SECTION 1

PRECAUTION

1.1 Safety Precautions

(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 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 ohm 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.).

1.2 Warning

(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.

1.3 Caution

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.

1.4 Critical parts for safety

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 JC version)

(No.YD016)1-3

1.5 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.

1.5.1 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) 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) Ground yourself

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

(3) Handling the optical pickup

• 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.)

• 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.

1.6 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1-4 (No.YD016)

1.7 Precautions for Service

1.7.1 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.

1.7.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity

Laser diodes are easily destroyed by static electricity charged on clothingor 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) It solders to two short circuit sections on the substrate of a pick-up. (4) After removing the flexible wire from the connector (CN101

), short-circuit the flexible wire by the metal clip.

(5) 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.

Main board

CN101

Gear1

Short circuit Pick-up

*Please refer to the disassembly method for details.

(No.YD016)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.YD016)

SECTION 3

TOP COVER

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the top cover (See Figure 1)

(1) Remove the two screws A attaching the top cover on both

sides of the main body. (2) Remove the three screws B attaching the top cover on the

back of the main body. (3) Raise the both sides and lower part of the rear of the top

cover, with opening them slightly in an outward direction.

And the top cover will be removed.

A x 2

TOP COVER

Fig.1

(No.YD016)1-7

3.1.2 Removing the mechanism assembly (See Figure 2, Figure 3, Figure 4)

Push

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

• There is no need to remove the front panel assembly. (1) Insert a kind of screwdriver in a hole located in the right

side of mechanism assembly, and push a lever until it cannot be inserted any further.

(2) And then, a tray will come out. Remove the tray in an upper

direction, with slightly opening the lower part of fitting in an outward direction.

(3) Remove the three screws C attaching the mechanism as-

sembly. (4) A tray is made to slide ahead. (5) A gear 1 is turned counterclockwise. Then, a pick-up unit

moves back. (6) It solders to two a sections on the pick-up unit. (7) Disconnect the card wire from connector CN201

on the main board.

CN101

, CN202,

ATTENTION:

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

when reassembling.

CN101

CAUTION:

Be sure to solder the short land sections “a” on the pick-

CN101

up unit before disconnecting the card wire from connector CN101

on the main board. If the card wire is disconnected without attaching solder, the pick-up unit may be destroyed by static electricity.

(8) Remove the mechanism assembly by lifting the rear part of

the mechanism assembly.

Fitting

CN202

Front panel assembly

Mechanism assembly

Tray

Push

Hole and lever

Fig.2

Main board

CN201Main board

Mechanism assembly

Fig.3

CN101

Gear1

Fig.4

Part a

Pick-up

1-8 (No.YD016)

3.1.3 Removing the front panel assembly (See Figure 5, Figure 6, Figure 7)

• Prior to performing the following procedure, remove the top cover and mechanism assembly. (1) Disconnect the card wire from connector CN3

board.

(2) Hook b and c are removed respectively, and the front panel

assembly is removed. (3) Remove the three screws D attaching the FL display board. (4) Disconnect the card wire from connector CN801

display board.

on the power

on the FL

Front panel assembly

Hook c

Front panel assembly

Fig.5

Hook c

CN3

Power board

Hook b

3.1.4 Removing the rear panel (See Figure 8)

• Prior to performing the following procedure, remove the top cover. (1) Remove the eight screws E attaching the rear panel. (2) Remove the power cord bushing.

Hook b

Fig.6

Front panel assemblyDDFL Display board

CN801

Fig.7

Bushing

Fig.8

(No.YD016)1-9

3.1.5 Removing the main board and power board. (See Figure 9)

• Prior to performing the following procedure, remove the top cover and rear panel. (1) Remove the two screws F attaching the main board. (2) Disconnect the card wire from connector CN809, CN101,

, CN202 on the main board.

CN201

(3) Disconnect the flat wire from connector CN633

board.

(4) Disconnect the socket wire from connector CN2

power board. (5) Remove the four screws G attaching the power board. (6) Disconnect the socket wire from connector CN1

power board.

on the main

on the

CN809

CN202

CN101

CN1

CN201

CN633

Power boardMain board CN2

Fig.9

1-10 (No.YD016)

3.2 Loading mechanism assembly

Projection of the tray

3.2.1 Removing the tray (See Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6)

(1) Push a of the slide cam on the hole in the right side of the

loading base by using a driver until it stops. (See Figure 1.)

(2) The tray comes out. Pull the tray in a front direction until it

stops.

(3) Remove the two screws A attaching the slide bracket. (See

Figure 2.)

(4) Tilt the tray in a direction of the arrow around the point in

the left rear part of the tray. (See Figure 3.)

(5) The rail of the tray is removed from b of the loading base.

Then, remove the tray upward. (See Figure 4.)

Attaching the tray:

Engage c of the loading base to the projection of the tray while tilting the tray to the left. Turn the tray in a direction of the arrow, and attach the slide bracket. (See Figure 5.)

Note:

Prior to the procedure above, move the slide cam in a direction of the arrow so that d of the slide cam can be inserted in e of the tray. (See Figure 6.)

Tray

The point in the left rear part

Tray

Fig.3

Push

Slide cam part a

Slide bracket

Fig.1

Fig.2

Loading base

Tray

Loading base part b

Rail of the tray

Fig.4

Projection of the tray

Loading base part c

Fig.5

Part e

Part d

Slide cam

Fig.6

(No.YD016)1-11

3.2.2 Removing the traverse mechanism assembly (See Figure 7)

Shaft

(1) Reverse the loading mechanism assembly. (2) A card wire is removed from a wire bracket. (3) Remove the four screws B attaching the traverse mecha-

nism assembly. Remove the traverse mechanism assem-

bly upward.

Loading mechanism assembly

3.2.3 Removing the elevator (See Figure 8 and Figure 9)

• Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove the two arms of the elevator from the two parts f

by moving the arms in a direction of the arrow.

(2) Pull out the elevator in a rear direction.

Attaching the elevator:

Engage the two holes g to the two shafts on the front part of the elevator. And then, attach the elevator.

wire bracket

Traverse mechanism assembly

Fig.7

Elevator

1-12 (No.YD016)

Part f

Fig.8

Slide cam

Elevator

Shaft

Fig.9

Part

3.2.4 Removing the loading motor (See Figure 10 and Figure 11)

• Prior to the following procedure, remove the tray, the traverse mechanism assembly, and the elevator. (1) Remove the belt from the pulley. (2) Remove two screws C attaching the loading motor. (3) Remove two solders h on the switch board.

Switch board

Pulley

Part h

Belt

Fig.10

Loading base

Pulley

Loading motor

Slide cam

Fig.11

(No.YD016)1-13

3.3 Traverse mechanism assembly

3.3.1 Removing the pickup (See Figure 12, Figure 13)

• Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove one screw D attaching the plate. (2) Remove the plate and the leaf spring. (3) Lift i of the shaft 1, and pull out the shaft 1 from j. (4) Remove k of the pickup from the shaft 2.

Attaching the pickup:

(1) Engage k of the pickup to the shaft 2. (2) Insert the shaft 1 in j, and attach the shaft 1 to i. (3) Attach the leaf spring, and then attach the plate. Fix the

leaf spring and the plate by using the screw D.

Leaf spring

Plate

Fig.12

Part j

Shaft 2

Part k

Shaft 1

Part i

Fig.13

1-14 (No.YD016)

SECTION 4

ADJUSTMENT

4.1 Test mode setting method

(1) Unplug the power plug. (2) Insert power plug into outlet while pressing both "PLAY" key and "STOP" key of the main body.

(3) The FL display shows "∗0", and the main body turns to test mode. "∗" means the destination, and "0" means parameter adjust-

ment status.The destination and a back end of version are displayed on the upper left of TV screen.

(4) To release test mode, press "POWER" key of the main body.

NOTE:

Each pressing of "SET UP" key of the remote controller in test mode changes the mode as follows.

0 --------------------------------------

_ _ ---------------------

---------------------

Becames test mode

Version of firmware

Device key index

FL Display becames all lighting

CHECK ---------------------------------

EXPERT -------------------------------

4.2 Method of displaying version of firmware

(1) Set the main body at test mode. (2) Press "SET UP" key of the remote controller once. Then, version number and alphabetical letter of the front end and the back

end are displayed in the FL display as follows:

Check mode

Not used

FL Display (example)

0B_09

Back end

Front end

4.3 Initialization method

Please initialize according to the following procedures in the following case:

• Just after you upgrade the firmware.

• After you confirm the symptoms that a customer points out. First Initialize, and then confirm whether the symptoms are improved or not.

• After servicing, before returning the main body to a customer. (Initialized main body should be returned to a customer.) (1) Set the main body at test mode. (2) Press "PAUSE" key of the main body.

(3) When initialization is completed, the FL display changes from "∗0" to "∗00".(The left "0" of "00" is not always "0". It shows pa-

rameter adjustment status.)

TV DVD

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

010 +10

TITLE

/GROUP

CH+

VOL VOL+

ENTER

SELECTCLEAR

SLOW

3D PHONIC

SUB TITLE

ANGLE

AUDIO

fs/Rate

REPEAT

DIMMER

STANDBY/ON

TV/VIDEO CANCELRETURN PAGE

SET UP key (change of mode)

NEXTPREVIOUS

SLOW+

VFPZOOM

PROGRESSIVE

SCAN

AMP VOL

POWER key

FL Display

STOP key

(for test mode)

PLAY key

(for test mode)

PAUSE key

(for initialize)

(No.YD016)1-15

4.4 All-initialization method

Please perform all-initialization according to the following procedures in the following case:

• Just after you exchange the pick-up.

• Just after you exchange the spindle motor.

• Just after you exchange the traverse mechanism base.

NOTE:

Please perform all-initialization when you exchange the parts above and also when you remove the parts above.

• Just after the flap adjustment of the pick-up guide shaft (1) Set the main body at test mode. (2) Press and hold "BACKWARD SKIP" key of the main body for more than 2 seconds.

(3) When all-initialization is completed, the FL display changes from "∗0" to "∗33".

NOTE:

After all-initialization, be sure to perform optimization adjustment of Front End parameter.

4.5 Optimization adjustment of Front End parameter

Adjustment to optimize Front End parameter must be performed in each mechanism assembly of this model for high-speed starting.Please perform optimization according to the following procedures just after all-initialization is completed and when FL display

shows anything except "∗0" (For example when FL display shows "∗1", "∗2", and "∗3") at test mode.

(1) Press "POWER" key of the main body to turn the main body on (not to set the main body at test mode). (2) Insert the test disc VT-501 or commercial dual-layer DVD software. (3) Remove the disc when the FL display changes from "READ" to disc information. (4) Perform the same procedures as in (2) and (3) above by using the test disc CTS-1000 or commercial CD-DA software.

(5) Set the main body at test mode, and check that the FL display shows "∗0".

NOTE:

Status of this adjustment can be judged by the number displayed at test mode as follows:

DVD adjustment CD adjustment FL display at test mode

Adjusted Adjusted ∗0 Not adjusted Adjusted ∗1 Adjusted Not adjusted ∗2 Not adjusted Not adjusted ∗3

NOTE:

As for a disc used for adjustment,

• Disc should be mounted. ("Mounting" means to display "READ" after the disc is inserted and then display the disc information.) Disc need not be played.

• If you do not have test disc either VT-501 (DVD) or CTS-1000 (CD-DA), use a commercial disc (for DVD, dual-layer software) after seeing and checking that the disc is neither curved nor foreseen that it may shake at the time of playback.If you use a disc with bad features, starting time may be slow or disc may not be read.

TV DVD

STANDBY/ON

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

010 +10

TITLE

TV/VIDEO

/GROUP

CANCELRETURN PAGE

CH+

VOL VOL+

ENTER

NEXTPREVIOUS

SELECTCLEAR

SLOW+

SLOW

VFPZOOM

3D PHONIC

PROGRESSIVE

SCAN

SUB TITLE

ANGLE

AUDIO

fs/Rate

AMP

VOL

REPEAT

DIMMER

POWER key

FL Display

STOP key

(for test mode)

PLAY key

(for test mode)

BACKWARD SKIP key

(for all initialize : it pushes 2 seconds or more.)

1-16 (No.YD016)

4.6 Display of current value of laser

(1) Set the main body at test mode. (2) Press "SET UP" key of the remote controller four times. Then, FL display is displayed "CHECK". (3) The laser current value can be switched between the value of CD and that of DVD by pressing the following key of the remote

controller.

FL Display (Example)

2530 0000

The number shown in the FL display shows mA of current value of laser.The first two numbers ("25" in "2530") shows current value of laser at the time of adjustment after the latest all-initialization, 25mA in this example.The last two numbers ("30" in "2530") shows the present current value of laser, 30mA in this example.The first two numbers ("25" in "2530") usually shows current value of laser at the time of shipment, so you can see how the product has been deteriorated by comparing the first two numbers ("25" in "2530") and the last two numbers ("30" in "2530").

CD:

The laser current value of 65 mA or less is normal. The laser current value of over 66 mA is not normal. Laser diode of the pickup has been deteriorated.

DVD:

The laser current value of 80 mA or less is normal. The laser current value of over 81 mA is not normal. Laser diode of the pickup has been deteriorated.

To return to test mode, press "STOP" key of the main body.

4.7 Flap adjustment of the pick-up guide shaft

Please perform flap adjustment of the pick-up guide shaft in the following case:

• Just after you exchange the pick-up.

• Just after you exchange the spindle motor.

• Just after you exchange the traverse mechanism base.

NOTE:

Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the parts above.

• When the reading accuracy of the signal is bad (There is a block noise in the screen, Screen stops in the outer circumference of a disc, etc.)

4 key (laser of CD)

TV DVD

STANDBY/ON

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

CH+

VOL VOL+

SLOW

3D PHONIC

SUB TITLE

ANGLE

REPEAT

5 key (laser of DVD)

010 +10

TITLE

TV/VIDEO

/GROUP

CANCELRETURN PAGE

SET UP key

ENTER

NEXTPREVIOUS

SELECTCLEAR

SLOW+

VFPZOOM

PROGRESSIVE

SCAN

AUDIO

fs/Rate

AMP

VOL

DIMMER

(change of mode)

POWER key

Remote controller "4" key --- Laser of CD Remote controller "5" key --- Laser of DVD

FL Display

STOP key

(for test mode)

PLAY key

(for test mode)

(No.YD016)1-17

4.7.1 Tool for adjustment

*Stud: One set (four studs), Part number: JIGXVS40 (Note: One of the four studs is not used here.)

*The phillips screwdriver for adjustment --- goods on the market

*Test disc ---- Parts number : VT-501

4.7.2 Preparation for adjustment

(1) See the disassembly procedure, and remove the mechanism assembly from the main body. (2) Attach the three studs to the mechanism assembly. (3) Put the mechanism assembly in the canter of the main body, and connect the three card wire from the connector

,CN201,CN202 on the main board.

CN101

Stud

CN202

Main board CN101

Stud

CN201

1-18 (No.YD016)

4.7.3 Adjustment

(1) Set the main body at test mode. (2) Press the "SET UP" key of the remote controller four times, and the FL display is displayed "CHECK". (3) Insert a test disc (VT-501), and press the numeric key "1" of the remote controller. (4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FL display is displays a jitter value. (5) Turn the adjustment screws on the underside of the traverse mechanism with phillips screw driver until the minimum jitter value

is displayed on the FL display.

NOTE:

• Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.

• Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.

Traverse mechanism assembly

Loading mechanism assembly

Screw c

POINT:

Turn the adjustment screws a and b to the same angle in the right direction. And turn the adjustment screws a and b to the same angle in the left direction. Then, turn the screws a and b in either the right or the left direction to increase the number of jitter. Don't turn the adjustment screw c.

Screw a

1 key (display of jitter value)

TV DVD

STANDBY/ON

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

CH+

VOL VOL+

SLOW

3D PHONIC

SUB TITLE

ANGLE

REPEAT

6 key

(display of jitter value)

010 +10

TITLE

TV/VIDEO

/GROUP

CANCELRETURN PAGE

SET UP key

(change of mode)

ENTER

NEXTPREVIOUS

SELECTCLEAR

SLOW+

VFPZOOM

PROGRESSIVE

SCAN

AUDIO

fs/Rate

AMP VOL

DIMMER

POWER key

Screw b

FL Display

STOP key

(for test mode)

PLAY key

(for test mode)

(No.YD016)1-19

4.8 Upgrading of firmware

The latest firmware for upgrading is updated in "Digital Video Storage" page in JS-net.At the time of service, compare the version of the product and the latest version, and upgrade the old version into the latest version.

(1) Press "POWER" key of the main body to turn the main body on (2) Insert the upgrade disc. (3) When FL display of the main body changes from "READ" to "UP", press "cursor UP" key () of the remote controller. (4) The entire screen becomes blue, and upgrading starts. (5) The tray opens automatically. Remove the upgrade disc. (6) A power supply will be turned off if it waits for a while. When the stand-by indicator is lighted, upgrading is completed. (7) Set the main body at test mode, and perform initialization. Then, confirm the version of the firmware.

Firmware upgrade Disc ... press UP

Upgrade application initializing...

NO DISC

fter inserting the up-grade disc

TV DVD

STANDBY/ON

OPEN

TV DVD

/CLOSE

TV1 TV2 TV3

TV4 TV5 TV6

TV7 TV8 TV9

TV-/-- TV0 MUTING

CH+

VOL VOL+

ENTER

SELECTCLEAR

SLOW

3D PHONIC

SUB TITLE

ANGLE

REPEAT

UP key

(for firmware upgrade)

010 +10

TITLE

TV/VIDEO

/GROUP

CANCELRETURN PAGE

SET UP key (change of mode)

NEXTPREVIOUS

SLOW+

VFPZOOM

PROGRESSIVE

SCAN

AUDIO

fs/Rate

AMP VOL

DIMMER

POWER key

While upgrading (blue screen)

FL Display

STOP key

(for test mode)

OPEN/CLOSE key

When up-grade is completed

PLAY key

(for test mode)

PAUSE key

(for initialize)

1-20 (No.YD016)

4.9 Confirm method of operation

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

Initialize Refer to the initialization method.

All-initialize Refer to the All-initialization method.

Parameter adjustment status Set the main body at test mode, and check that the FL display shows "∗0".

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.

Search 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.

(No.YD016)1-21

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