JVC XV-MK5GSL Service Manual

XA009200310

SERVICE MANUAL

DVD VIDEO PLAYER

XV-MK5GSL

Area Suffix

A --------------------- Australia
US ---------------- Singapore
UW ----- Brazil,Mexico,Peru
UX ------------- Saudi Arabia

TV

DVD

KARAOKE

STANDBY/ON

OPEN/

DISC

TV DVD

CLOSE

SELECT

TV1 TV2 TV3

2

1

3

TV4 TV5 TV6

5

4

6

TV7 TV8 TV9

8

7

9

TV-/-- TV0 MUTING

010 +10

RESERVE

TV/VIDEO

TITLE/GROUP

CANCELRETURN

U

N

E

CH

M

+

P

O

T

VOL VOL+

ENTER

C

CH

H

O

I

C

E

N

O

NEXTPREVIOUS

SELECTCLEAR

SLOW

-

SLOW+

3D

PHONIC

PROGRESSIVE

KARAOKE

KARAOKE

VOCAL

SCAN

SOUND

SUB TITLE

ANGLE

AUDIO

ECHO

KEY+

REPEAT

DIMMER

KEY EFFECT

VIDEO

M

E

N

U

N

E

E

R

C

S

VFPZOOM

AMP
VOL

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED

No.XA009

2003/10

SPECIFICATION

General

Readable discs DVD VIDEO, DVD-R (Video format), DVD-RW (Video format), SVCD, Video CD, Audio CD (CD-DA),

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

Video format NTSC, 525i (Interlaced scan)/525p (Progressive scan) selectable

PAL, Interlaced scan

Other

Power requirements AC 110V-240V, 50Hz/60Hz (Only for Australia model:AC240V, 50Hz)
Power consumption 12 W (POWER ON) 1.0 W (STANDBY mode)
Mass 4.4 kg
Dimensions (W x H x D) 435mm x 83mm x 322mm

Video outputs

COMPONENT (pin jacks) Y Output: 1.0 Vp-p (75 ohm), Pb/Pr Output: 0.7Vp-p (75 ohm)
VIDEO OUT (pin jack) 1.0 Vp-p (75 ohm)
S-VIDEO OUT (S jack) Y Output: 1.0 Vp-p (75 ohm), C Output: 286 mVp-p (75 ohm)
Horizontal resolution 500 lines or more

Audio input

MIC 1/2 4mVrms (8.2 kohm)

Audio outputs

ANALOG OUT (pin jack) 2.0 Vrms (10 kohm)
DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 ohm 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
Dynamic range 16 bit: More than 98 dB, 20 bit: More than 100 dB, 24 bit: More than 100 dB
Wow and flutter Unmeasurable (less than ±0.002%)
Total harmonic distortion less than 0.006%

• Specifications and appearance are subject to change without prior notice.

• Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarkes of Dolby Laboratories.

• "DTS"is a trademark of Digital Theater Systems, Inc.

Digital output signal chart

Disc type Output

PCM ONLY DOLBY DIGITAL/PCM STREAM/PCM

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

DVD with 96 kHz,
16/22/24 bit linear PCM

DVD with DTS 48kHz, 16bit, stereo linear PCM DTS bitstream
DVD with Dolby Digital 48 kHz, 16 bit, stereo linear PCM Dolby Digital bitstream
DVD with MPEG

Multichannel
SVCD/Video CD/Audio CD 44.1 kHz, 16 bit, stereo linear PCM
Audio CD with DTS 48kHz, 16bit, stereo linear PCM DTS bitstream
CD-R/RW with MP3/WMA No output
An y d i s c w i t h K A R A O K E m o d e 48/44.1kHz, 16bit, stereo liear PCM

48kHz, 16 bit, stereo linear PCM MPEG bitstream

48/44.1 kHz, 16 bit, stereo linear PCM

48kHz, 16 bit, stereo linear PCM (Down sampling)

1-2 (No.XA009)

SECTION 1

PRECAUTION

1.1 Safety Precautions

(1) This design of th is product contains special hardw are 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.

• P lug 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 resp onsibility 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 compone nts 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.XA009)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 dio de) 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 sh eet) 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 instal lation, both sides of the laser di ode on the replacement optica l
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.XA009)

1.7 Import for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

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

4.CAUTION : The compact disc player uses invisible 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

ADVARSEL: Usynlig laser-

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

The inside of a rear panel

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)

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

(No.XA009)1-5

1.8 Precautions for Service

1.8.1 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 an d 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.

1.8.2 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) After removing the flexible wire from the connecto r (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.

Short circuit

Short circuit

CN101

*Please refer to the disassembly method for detailes.

Servo control board

1-6 (No.XA009)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.XA009)1-7

SECTION 3

TOP COVER

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the top cover (See Figure 1)

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

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

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

cover, with opening them slightly in an outward direction.

And the top cover will be removed.

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

• Prior to performing the following procedure, remove the top

cover.

• There is no need to remove the mechanism assembly.

(1) Disconnect the flat wire from connector JT901

the power supply board.

(2) Disconnect the card wire from connector CN501

on the servo control board and signal output terminal board
respectively.

(3) Disconnect the flat wire from connector JT701 on the signal

output terminal board.

(4) Remove the one screw J attaching the MIC amplifier

board.

(5) Remove the three screws C attaching the front panel

assembly on the bottom of the main body.

(6) Hook a and b are removed respectively, and the front panel

assembly is removed.

3.1.3 Removing the changer mechanism assembly
(See Figure 2, Figure 4)

• Prior to performing the following procedure, remove the top

cover.

• There is no need to remove the front panel assembly.

(1) Disconnect the card wire from connector CN501

on the servo control board.

CN503

(2) Remove the four screws D attaching the changer

mechanism assembly.

, JT902 on

, CN702

, CN502,

TOP COVER

TOP COVER

A x 2

A x 2

Fig.1

Front panel
assembly

Hook a

Mechanism assembly Servo control boardCN502

Hook b

C

Fig.3

B

B

C

Hook a

Hook b

C

CN702

JT701

Signal output terminal board

1-8 (No.XA009)

JT901,JT902

D

D

Fig.2

MIC Amplifier board

J

D

D

Power supply board

CN501 CN503

Fig.4

3.1.4 Removing the servo control board (See Figure 5)

Servo

control board

• Prior to performing the following procedure, remove the

changer mechanism assembly.
(1) Disconnect the card wire from connector CN101

, CN103,

CN104, CN105, CN201 on the servo control board.

ATTENTION :

At this time, please extract the wire after short-circuited
of two places on the wire in part c with solder. Please
remove the solder two places of part c after connecting
the wire CN101

when reassembling.

(2) Remove the two screws E attaching the servo control

board.

Servo

control board

E

Part c

E

3.1.5 Removing the power supply boa rd (Se e Fi gu re 6, Fi gu re 7)

• P rior to performing the following procedure, remove the top

cover.
(1) Disconnect the flat wire from connector JT901

, JT904 on the power supply board.

JT903

, JT902,

(2) Disconnect the socket wire from connector P901 on the

power supply board.

(3) Remove the three screws F attaching the power supply

board.

(4) Remove the one screw G attaching the power supply board

on the back of the main body.

3.1.6 Removing the signal output terminal board

(See Figure 6, Figure 7)

• P rior to performing the following procedure, remove the top

cover.
(1) Disconnect the card wire from connector CN601

, CN701,

CN702 on the signal output terminal board.

(2) Disconnect the flat wire from connector JT701

on the signal

output terminal board.

(3) Disconnect the flat wire from connector JT903, JT904 on

the power supply board.

(4) Remove the three screws H attaching the signal output

terminal board.

(5) Remove the six screws I attaching the signal output

terminal board on the back of the main body.

H

CN702

CN601

H

CN201

CN101 CN105 CN104 CN103

Fig.5

H

CN701

JT701

JT901,JT902

JT903,JT904

Power supply boardSignal output terminal board

Fig.6

P901

F

F

F

I

I

G

Fig.7

(No.XA009)1-9

3.2 Changer mechanism Section

r

3.2.1 Removing the tray assembly
(See Figs.1 to 5)

(1) Remove the two screws A from the top cover and release

the two joints a on both sides of the body.

(2) Remove the top cover with the two rods attached to the top

cover and lifter assembly respectively.
(3) Remove the open det lever on the left side of the body.
(4) Push part b of the slide (R) assembly on the right side of

the body to unlock the tray assembly. Draw out the trays to-

ward the front.

Attention:

The tray can be locked if all tray assemblies are at­tached.

(5) From top of the body, move the stopper tab c in the direc-

tion of the arrow and release. Pull out the tray assemblies

from the body.

Caution:

Remove the tray assembly from top tray 5 in order.

Attention:

When reattaching the sub tray of the tray assembly, or when
removing the DISC remaining inside, refer to another section.

Top cover

Open det leve

Fig.3

c

A

a

Lifter assembly

a

Rod

Fig.1

Top cover

A

a

Tray assembly

(Tray 5)

b

Fig.4

Rod

1-10 (No.XA009)

a

Lifter assembly

Fig.2

Fig.5

3.2.2 Removing the m oto r board
(See Fig.6)

(1) Unsolder the four soldered parts on the motor of the motor

board.

Caution:

If removing the motor board with the motor, you should
remove the screws attaching the motor from top of the

body(Refer to another section).
(2) Remove the two screws B attaching the motor board.
(3) Remove the spacer fixing the motor board and tray switch

board, and disconnect connector CN2

(4) Disconnect the card wire from connector CN1 on the motor

board.

Caution:

When reconnecting the card wire, let the card wire through the
slot d of the motor board and attach it to the bottom of the body
using a double tape.

3.2.3 Removing the traverse mechanism assembly
(See Fig.7)

• P rior to performing the following procedu re, remove the servo

control board.
(1) Turn over the body and remove the three screws C attach-

ing the tramecha.

on the motor board.

CN2

CN1

d

Spacer

Soldering point

B

B

Motor

Double

face tape

Card wire

Fig.6

C

C

C

Traverse mechanism assembly

Fig.7

(No.XA009)1-11

3.2.4 Removing the pickup
(See Fig.8-1, 8-2)

• Prior to performing the following procedure, remove the servo

control board and traverse mechanism assembly.

(1) Remove one screw D attaching the bracket. Then the

bracket is also removed.

(2) Slide e part of the worm shaft slightly in a direction of the

arrow, and pull out the worm shaft while lifting the worm
shaft in a direction of the arrow.

• The guide collar is also removed.

• Be sure to solder the short round point f on the pickup be­fore removing the flexible wire from the pickup. In assem­bling procedure, connect the flexible wire to the
connector, and then be sure to unsolder the short round
point.

• Insert the guide collar in the worm shaft before attaching
the pickup.

(3) Remove the two screws E attaching the rack pl ate, a nd re-

move the rack plate.

(4) Pull out the worm shaft from the pickup.

Part e

Braket

D

Worm shaft

Rack plate

E

Pick-up

Guide collar

Fig.8-1

Pick-up

Connector

Flexible wire

Fig.8-2

Part f

1-12 (No.XA009)

3.2.5 Removing the side (L)/ tray switch board
(See Figs.9 to 11)

• P rior to performing the following procedure, remove the tray

assembly.
(1) Remove the two screws F attaching the si de (L) on top of

the body.

(2) From the side of the body, remove the spacer fixing the tray

switch board and motor board. Disconnect connector CN3

on the tray switch board and detach the side (L) upward.
(3) Remove the screw G attaching the tray switch board.
(4) Push the joint tab g of the side (L) in the direction of the ar-

row and remove the tray switch board outward, then re-

lease joint h.

F

F

F

CN3

Spacer

Side (L)

Fig.9

Side (L)

F

Fig.10

g

Side (L)

h

G

Tray switch board

Fig.11

(No.XA009)1-13

3.2.6 Removing the side (R) assembly
(See Figs.12 to 17)

• Prior to performing the following procedure, remove the tray

assembly.

(1) Bend i part of the bracket in a direction of the arrow by us-

ing pliers.
(2) Remove the one screw H attaching the bracket.
(3) Push and release the two tabs j of the gear co ver through

the two notches inside the side (R) assembly. Remove the

gear cover outward.
(4) Remove the spring attached to part k of the hook on the

right side of the body.
(5) From top of the body, turn the gear 1 clockwise to move the

elevator cam rearward.Move the two slots l and joint m of

the elevator cam as shown in Fig.16 and remove the ele-

vator cam outward.
(6) Remove the three screws I and detach the side (R) upward.

Caution:

When reattaching the side (R) assembly, make sure to fit the
shaft(part n) into the slot of the select lever.

H

Braket

Side (R) assembly

Gear cover

Elevator com

Side (R) assembly

gear 1

Spring

k

Fig.14

j

Side (R)
assembly

Part i

Fig.15

Spring

Fig.12

I

n

l

Fig.16

I

Side (R) assembly

I

m

k

Elevator cam

l

I

I

1-14 (No.XA009)

Fig.13

Fig.17

3.2.7 Removing the lifter assembly
(See Figs.18 to 22)

• P rior to performing the following procedure, remove the tray

assembly and side (L)/ side (R) assembly.
(1) From top of the body, turn the gear 1 clockwise to move the

lifter assembly upward as shown in Fig.19.

(2) From top of the body, turn the gear 2 clockwise to move the

hook toward the front until it stops.

(3) Move the hook stopper in the d irection of the arrow while

pushing the tab o of the hook stopper to unlock it. Release
four joints p to detach from the rack holder.
Release the rod from part q.

(4) Turn the gear 1 clockwise again to move the lifter assembly

upward.

(5) Remove the lifter assembly from the body upward at posi-

tion r where the four pins on the right and left sides of the
lifter assembly fit to the notches of the s.
Move the lifter assembly toward the front and release from
the hook.

Gear 2

Gear 1

Hook

q

p

Rod

p

p

o

p

Hook stopper

Fig.20

Lifter assembly

Gear 1

r r

Hook stopper

Hook

Gear 2

Fig.18

Gear 1

Lifter
assembly

Lifter assembly

s

Lifter assembly

Fig.21

r

r

Hook stopper

Hook

Fig.19

s

Fig.22

(No.XA009)1-15

3.2.8 Removing the rack holder assembly/ sensor assembly
(See Figs.23 to 28)

• Prior to performing the following procedure, remove the tray

assembly, side (L)/ side (R) assembly, lifter assembly.

Attention:

If the slide gear of the body places at joint t of the rack holder
assembly, turn the gear 1 countercl ockwise to move the slide
gear toward the front. Remove the rack holder assembly.
(1) Remove the three screws J attaching the rack holder as-

sembly. Release joint t from the notch.

Caution:

When reattaching the rack holder assembly, do not nip

the wire u extending from the sensor assembly.
(2) Remove the two screws K attaching the sensor assembly.
(3) Move the sensor assembly in the direction of the a rrow to

release from the slot at joint v.

(4) Remove the spring attached to the bottom of the sensor as-

sembly from the boss w on the sensor slider.

(5) Remove the screw L and M attaching the sensor board and

SV resister respectively.If necessary, unsolder the sensor
board.

Caution:

When reattaching the SV resister, attach the sensor slider to
the sensor bracket and fit the lever on the bottom of the SV re­sister into slot x of the sensor slider.

Caution:

When reattaching the rack holder assembly, turn the gear 1
clockwise to move the slide gear and slide lever inside the
body rearward.

• Let the wire extending from the sensor assembly through notch
u to the bottom of the body.

•Fit pin y of the slide lever into hole z of the sensor slider on the
bottom of the sensor assembly while attaching the spring to the
boss w of the sensor slider.

• Engage joint v of the sensor assembly to the notch of the body.

Rack holder

assembly

Rack holder

assembly

J

J

Gear 1

u

t

J

Fig.23

Rack holder

assembly

1-16 (No.XA009)

t

t

Fig.24

u

M

Soldering

SV resister

L

Sensor board

point

K

w

K

Sensor slider

v

x

Fig.25

Sensor assembly

Sensor braket

x

Sensor slider

Fig.27

Spring

Sensor assembly

z

Spring

Slide gear

v

K

K

z

w

Fig.26

w

y

Spring

Fig.28

Slide lever

(No.XA009)1-17

3.2.9 Removing the motor

r

(See Fig.29, 30)

• Prior to performing the following procedure, remove the servo
control board and top cover.

Attention:

You need not to remove the tray assembly, and in such case,
move it.
(1) Remove the two belts on top of the body.
(2) Remove the four screws N attaching the motor.
(3) Remove the motor board from the bottom of the body.

(Refer to the section “Removing the motor board”.)

Attention:

When removing the motor board with the motor, you need not
to unsolder four soldered parts.

Caution:

When reattaching the motor, turn the side where the label
should be put to the front side.

Motor

Moto

NN

Belt

Fig.29

Label

Belt

Fig.30

1-18 (No.XA009)

3.2.10 Taking out the DISC in play mode

r

(See Figs.31 to 34)

• P rior to performing the following procedure, remove the top
cover.

• Y ou can perform the procedure above even if you don't re­move the changer mechanism assembly from the chassis of
the unit.
(1) Remove the three screws attaching the front panel assem-

bly, and move the front panel assembly in the front direc-

tion slightly.
(2) Remove the top cover upward.
(3) Unlock the tray assembly and draw out the tray assembly

toward the front.
(4) From top of the body, turn the gear 1 clockwise to move the

lifter assembly upward.
(5) From top of the body, turn the gear 2 clockwise to move the

sub tray remaining inside the lifter assembly toward the

front, then pull out.
(6) Take out the DISC on the sub tray.
(7) After clearing away the DISC, insert the sub tray into the

main tray.

Caution:

When reattaching the sub tray, move the tray stopper on
the bottom of the main tray in the direction of the arrow
to lock the sub tray certainly.

(8) Push the tray assembly toward the body and reattach.

Tray assembly

Tray assembly

Tray stopper

Sub tray

Fig.32

Main tray

Gear 2

Fig.31

Gear 1

Sub tray

Sub tray

Fig.33

Tray stoppe

Fig.34

(No.XA009)1-19

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 de stination, and "0" means parameter adjust-

ment status.

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

NOTE:

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

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

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

Becames test mode

Version of firmware

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 "CHOICE" key of the remote controller once. Then, versio n number and alphabe tical letter of the system controller and

the back end are displayed in the FL display as follows:

Check mode

Not used

FL Display (Example)

34_02_57

Back end

Front end

System controller

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 le ft "0" of "00" is not always "0". It shows pa-

rameter adjustment status.)

OPEN/

DISC

CLOSE

SELECT

TV1 TV2 TV3

1

TV4 TV5 TV6

4

TV7 TV8 TV9

7

TV-/-- TV0 MUTING

U

N

E

CH

M

+

P

O

T

VOL VOL+

ENTER

C

CH

H

O

I

C

E

-

SLOW

3D

PHONIC

KARAOKE

VOCAL

SUB TITLE

ANGLE

ECHO

KEY+

REPEAT

KEY EFFECT

1-20 (No.XA009)

TV

2

5

8

010 +10

RESERVE

TITLE/GROUP

SELECTCLEAR

KARAOKE

SOUND

AUDIO

DIMMER

DVD

KARAOKE

STANDBY/ON

TV DVD

3

6

9

TV/VIDEO
CANCELRETURN

M

E

N

U

CHOICE key

N

E

E

R

C

(switch of mode)

S

N

O

NEXTPREVIOUS

SLOW+

VFPZOOM

PROGRESSIVE

SCAN

AMP
VOL

POWER key

FL Display

STOP key

(for test mode)

PAUSE key

(for initialize)

PLAY key

(for test mode)

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.

• J ust 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 fo r 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 assemb ly of this model for high-speed start­ing.Please perform optimization according to the following p rocedures just after all-initialization i s 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 "READING" 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 "READING" after the disc is inserted and then display the disc infor­mation.) Disc need not be played.

• If yo u do not have test disc either VT-501 (DVD) or CTS-1000 (CD-DA), use a commercia l disc (for DVD, dual-layer soft­ware) after seeing and checking that the di sc is neit her 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

KARAOKE

STANDBY/ON

OPEN/

DISC

TV DVD

CLOSE

SELECT

TV1 TV2 TV3

3

1

2

TV4 TV5 TV6

6

4

5

TV7 TV8 TV9

9

7

8

TV-/-- TV0 MUTING

010 +10

RESERVE

TV/VIDEO

TITLE/GROUP

CANCELRETURN

U

M

N

E

E

CH

N

M

U

+

P

O

T

VOL VOL+

ENTER

C

H

O

I

SLOW

KARAOKE

ANGLE

KEY+

REPEAT

KEY EFFECT

N

CH

E

E

R

C

C

E

S

N

O

NEXTPREVIOUS

SELECTCLEAR

-

SLOW+

3D

VFPZOOM

PHONIC

PROGRESSIVE

KARAOKE

VOCAL

SCAN

SOUND

SUB TITLE

AUDIO

ECHO

AMP
VOL

DIMMER

POWER key

STOP key

FL Display

(for test mode)

BACKWARD SKIP key

(for All-initialize : It pushes 2 seconds or more.)

PLAY key

(for test mode)

(No.XA009)1-21

4.6 Display of current value of laser

(1) Set the main body at test mode.
(2) Press "CHOICE" key of the remote controller three times. T hen, FL display is displayed "CHECK".
(3) The laser current value can be switched between th e value of CD and that of DVD by pressing the following key of the re mote

controller.

FL Display (Example)

1419 0000

The number shown in the FL display shows mA of current value of laser.
The first two numbers ("14" in "1419") shows current value of laser at the time of adjustment after the latest all-initialization, 14mA
in this example.
The last two numbers ("19" in "1419") shows the present current value of laser, 19mA in this example.
The first two numbers ("14" in "1419") 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 ("14" in "1419") and the last two numbers ("19" in "1419").

CD and DVD:

The laser current value of 80 mA or less is normal.The laser current value of over 81 mA is n ot 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)

5 key (laser of DVD)

TV

DVD

KARAOKE

STANDBY/ON

OPEN/

DISC

TV DVD

CLOSE

SELECT

TV1 TV2 TV3

3

1

2

TV4 TV5 TV6

6

4

5

TV7 TV8 TV9

7

TV-/-- TV0 MUTING

U

N

E

CH

M

+

P

O

T

VOL VOL+

ENTER

C

CH

H

O

I

C

E

SELECTCLEAR

-

SLOW

3D

PHONIC

KARAOKE

VOCAL

SUB TITLE

ANGLE

ECHO

KEY+

REPEAT

KEY EFFECT

6 key

9

8

(display of jitter value)

010 +10

RESERVE

TV/VIDEO

TITLE/GROUP

CANCELRETURN

M

E

N

U

CHOICE key

N

E

E

R

C

(switch of mode)

S

N

O

NEXTPREVIOUS

SLOW+

VFPZOOM

PROGRESSIVE

KARAOKE

SCAN

SOUND

AUDIO

AMP
VOL

DIMMER

POWER key

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

(for test mode and jitter value)

STOP key

FL Display

(for test mode)

PLAY key

1-22 (No.XA009)

4.7.1 Tool for adjustment

*Stud: One set (four studs), Part number: JIGXVS40

4.7.2 Preparation for adjustment

(1) See the disassembly procedure, and remove the changer mechanism assembly from the main body.
(2) Remove the servo control board attached to the changer mechanism assembly.

(If you disconnect the wires connected to the servo control board, connect them again.)
(3) Attach the four studs to the changer mechanism assembly.
(4) Put the changer mechanism a ssembly in the center of the main body, and connect the card wire from the connector CN501,

CN502, CN503 on the servo control board.

Stud

Changer mechanism assembly

Servo control board

Stud

Changer mechanism assembly

4.7.3 Adjustment

(1) Set the unit to test mode.
(2) Press the "CHOICE" key of the remote controller three times, and the FL display is displayed "CHECK".
(3) A PLAY key is pushed after insert a test disc (VT-501), and press the numeric key "1" of the remote controller for automatic

adjustment.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FL display displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with phillips screw driver until the maximum jitter value

is displayed on the FL display. (In this model, a bigger jitter value means a better result.)

NOTE:

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

Screw a

Front

Stud

Screw b

CN502

CN501

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.

CN503

FL Display (Example)

1162 1419

Screw c

Jitter

(No.XA009)1-23

4.8 Upgrading of firmware

A

The latest firmware for upgrading is updated in "Optical disc CSG" page in JS-net.At the time of service, co mpare the version of th e
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) A disc button is pushed after inserting an upgrade disc in a tray 1.
(3) When FL display of the main body changes from "READING" to "UPGRADE", 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) The screen returns to the normal screen. Then, press "POWER" key of th e main body. When the stan d-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

KARAOKE

STANDBY/ON

OPEN/

DISC

TV DVD

CLOSE

SELECT

TV1 TV2 TV3

1

2

TV4 TV5 TV6

4

5

TV7 TV8 TV9

7

8

TV-/-- TV0 MUTING

010 +10

U

N

E

CH

M

+

P

O

T

VOL VOL+

ENTER

C

CH

H

O

I

C

E

SELECTCLEAR

-

SLOW

3D

PHONIC

KARAOKE

VOCAL

SUB TITLE

ANGLE

ECHO

KEY+

REPEAT

KEY EFFECT

UP key

3

(for firmware upgrade)

6

9

RESERVE

TV/VIDEO

TITLE/GROUP

CANCELRETURN

M

E

N

U

CHOICE key

N

E

E

R

(switch of mode)

C

S

N

O

NEXTPREVIOUS

SLOW+

VFPZOOM

PROGRESSIVE

KARAOKE

SCAN

SOUND

AUDIO

AMP

VOL

DIMMER

POWER key

While upgrading (blue screen)

FL Display

(for test mode)

OPEN/CLOSE key

Disc button

When up-grade is completed

STOP key

PLAY key

(for test mode)

PAUSE key

(for initialize)

1-24 (No.XA009)

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.XA009)1-25

5.1 Servo volume

Press OPEN
/CLOSE key

SECTION 5

TROUBLE SHOOTING

Is tray

operation

Confirmation of tray drive circuit

N

and circuit in surrounding

correct?

Y

Is the traverse moving
along the innermost

N

perimeter for SW detection?

Y

"NO DISC" message appears

Y

immediately after vertical
movement of the pick-up lens

N

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.

N

Is focus retraction OK?

FE

OFF

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

ON

See "(4) Focus ON error"

N

in "Check points for
individual errors"

Y

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"

Y

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

Is the inter-layer jump OK?

FE

LO LI

A

Two layers of DVD only.

N

(8) Inter-layer

jump error

Y

TE

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?

1-26 (No.XA009)

ON

A

See "(5) Tracking ON error"

N

in "Check points for
individual errors"

Has the disc information

been collected?

Stop will result

N

(7) Address read

error

Y

Y

Check (9),(10),(11), and

See "(6) Spindle CLV error"

N

in "Check points for
individual errors"

Is playback

possible?

Y

N

(12) items in "Check points
for individual errors"

Y

OK !

Fig.1

5.2 Check points for each error

5.2.1 Spindle start error

(1) Defective spindle motor

• A re 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?

5.2.2 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)?

5.2.3 Traverse movement NG

(1) Defective traverse driver

• Has the voltage come between terminal of CN101 "21" and "23" ?

(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? (IC301 "56")

5.2.4 Focus ON NG

• Is FE output ? --- Pattern, IC101

• Is FODRV signal sent ? (R209) --- Pattern, IC301 "115"

• I s driving voltage sent ?IC201 "13", "14" --- If NG, pattern, driver, mechanical unit .

• M echanical unit is defective.

5.2.5 Tracking ON NG

• When the tracking loop cannot be drawn in, TE shape of waves does not settle .

• M echanical unit is defective.
Because the self adjustment cannot be normally adjusted, the thing which cannot be normally drawn in is thought.

• P eriphery of driver (IC201)
Constant or IC it self is defective.

• Servo IC (IC301)
When improperly adjusted due to defective IC.

(No.XA009)1-27

5.2.6 Spindle CLV NG

• IC101 -- "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.

5.2.7 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
The disc is dirty or the wound has adhered.

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

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

5.2.9 Neither picture no r sound is output

(1) It is not possible search

• Has the tracking been turned on?

• To " Tracking ON NG" in "Check points for each error" when the tracking is not normal.

• Is the feed operation normal?
To " traverse movement NG" in "Check points for each error" when it is not normal.Are not there caught of the feeding mech­anism etc?

5.2.10 Picture is distorted or abnormal sound occurs at intervals of several seconds.

Is the feed operation normal?
Are not there caught of the feeding mechanism etc?

5.2.11 Others

• The image is sometimes blocked, and the image stops.

• The image is blocked when going to outer though it is normal in suroundings in the disk and the stopping sympton increases.

There is a possibility with bad jitter value for such a symptom.

5.2.12 CD During normal playback operation

(1) Is TOC reading normal?

• Displays total time for CD-DA.

• Shifts to double-speed mode for V-CD

(2) Is playback afterwards possible?
(3) When can not do a normal playback

• --:-- is displayed during FL search.
According to [It is not possible to search ] for DVD, check the feed and tracking systems.

• No sound is output although the time is displayed.(CA-DA)
DAC, etc, other than servo.

• The passage of time is not stable, or picture is abnormal.(V-CD)

• The wound of the disc and dirt are confirmed.

1-28 (No.XA009)

(No.XA009)1-29

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY OPTICAL DISC CATEGORY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan

(No.XA009)

Printed in Japan

WPC