JVC XV-N318S Service Manual

SERVICE MANUAL

DVD PLAYER

YD03420048

XV-N318S

Area Suffix

US ---------------- Singapore

Turkey,South Africa,Egypt

UG ­UX ------------- Saudi Arabia
UF ---------------------- China
UB --------------- Hong Kong

KARAOKE

DVD

STANDBY/ON

OPEN

/CLOSE

DISPLAY

213

546

879

010 +10

RESERVE

TITLE/GROUP

CANCELRETURN

U

M

N

E

E

N

M

U

P

THUMBNAIL

O

T

S

E

T

SLOW

KARAOKE

ANGLE

SLIDE EFFECT

/LIST

ENTER

N

E

E

R

U

C

P

S

N

O

NEXTPREVIOUS

SELECTCLEAR

-

SLOW+

SOUND

VFPREPEAT

EFFECT

PROGRESSIVE

KARAOKE

VOCAL

SCAN

SOUND

SUB TITLE

ZOOM

AUDIO

ECHO

KEY+

DIMMER

KEY

VIDEO

XV-N318SUS2C, XV-N318SUG2C, XV-N318SUX2C, XV-N318SUF2C, XV-N318SUB2C

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

COPYRIGHT © 2004 Victor Company of Japan, Limited

No.YD034

2004/8

SPECIFICATION

Specifications and appearance are subject to change without prior notice.

XV-N318S for US,UG,UX,UF,UB

General

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

RW (CD-DA, SVCD, Video CD, MP3 format, JPEG, MPEG-4)

Video format PAL, 625i (Interlaced scan)NTSC, 525i (Interlaced scan)/525p (Progressive scan) selectable

Other

Power requirements AC 110 V - 240 V~ , 50 Hz/60 Hz
Power consumption 11.0 W (POWER ON), 2.0 W (STANDBY mode)
Mass 1.6 k g
Dimensions (W × H × D) 435 mm × 44 mm × 201 mm

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 input

MIC 1/2 4mVrms (8.2 kΩ)

Audio outputs

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

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/24 bit: More than 100 dB
Wow and flutter Unmeasurable (less than +- 0.002%)
Total harmonic distortion less than 0.009%

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

• "DTS" and "DTS 2.0+Digital Out" are trademarks of Digital Theater Systems, Inc.

• USE OF THIS PRODUCT IN ANY MANNER THAT COMPLIES WITH THE MPEG-4 VISUAL STANDARD IS PROHIBITED, EXCEPT FOR
USE BY A CONSUMER ENGAGING IN PERSONAL AND NON-COMMERCIAL ACTIVITIES.

• 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.

• “CONSUMERS SHOULD NOTE THAT NOT ALL HIGH DEFINITION TELEVISION SETS ARE FULLY COMPATIBLE WITH THIS PROD­UCT AND MAY CAUSE ARTIFACTS TO BE DISPLAYED IN THE PICTURE. IN CASE OF 525 OR 625 PROGRESSIVE SCAN PICTURE
PROBLEMS, IT IS RECOMMENDED THAT THE USER SWITCH THE CONNECTION TO THE “STANDARD DEFINITION” OUTPUT. IF
THERE ARE QUESTIONS REGARDING OUR TV SET COMPATIBILITY WITH THIS MODEL 525p AND 625p DVD PLAYER, PLEASE
CONTACT OUR CUSTOMER SERVICE CENTER.”
Digital output signal chart

Disc type

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

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
DVD with MPEG Multichannel 48 kHz, 16 bit, stereo linear PCM MPEG bitstream
SVCD/Video CD/Audio CD 44.1 kHz, 16 bit, stereo linear PCM
Audio CD with DTS 48 kHz, 16 bit, stereo linear PCM DTS bitstream
CD-R/RW with MP3 Linear PCM
CD-R/RW with MPEG-4 No output

PCM ONLY DOLBY DIGITAL/PCM STREAM/PCM

48/44.1 kHz, 16 bit, stereo linear PCM

Output

1-2 (No.YD034)

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.YD034)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.

1.7 Precautions of the safe use of battery

• Store the battery in a place where children cannot reach.If a child accidentally swallows the battery, consult a doctorimmediately.

• Do not recharge, short, disassemble or heat the battery or dispose of it in a fire.
Doing any of these things may cause the battery to give off heat, crack, or start a fire.

• Do not leave the battery with other metallic materials.Doing this may cause the battery to give off heat, crack, or start a fire.

• When throwing away or saving the battery, wrap it in tape and insulate; otherwise, the battery may start to give off heat, crack, or
start a fire.

• Do not poke the battery with tweezers or similar tools.Doing this may cause the battery to give off heat, crack, or start a fire.

• Dispose of batteries in the proper manner, according to federal, state, and local regulations.

1-4 (No.YD034)

1.8 Important for laser products

(1) CLASS 1 LASER PRODUCT
(2) DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

(3) CAUTION : There are no serviceable parts inside the

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

(4) CAUTION : The compact disc player uses invisible 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.

VARNING

Osynlig laserstrålning är denna del är öppnad och spårren är
urkopplad. Betrakta ej strålen.

VARO

Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymät­tömälle lasersäteilylle. Älä katso säteeseen.

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er
ude af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryteren er avs­lott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABEL and PRINT

WARNING LABEL and PRINT

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

to function.

(6) CAUTION : Use of controls, adjustments or performance of

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

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

The inside of a rear panel

N

T

S

C

5

25

i

NT

/

p

R

SC

E

M

O

525i

T

E

P

A

L 625i

VI

DEO

SIGN

V

SELE

ID

CO

E

O

A

L

C

T

OR

MP

ONE

N

A

C

O

M

P

U

T

V

Y

L

I

N

P

K

B

S

-

V

I

DE

P

O

R

D

IGIT

L

E

F

T

P

VIDEO

CM/STR

O

UT

R

IG

H

T

A

UDI

O

O

U

T

AL O

U

T

EAM

C

O

A

X

I

A

L

(No.YD034)1-5

1.9 Precautions for Service

1.9.1 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.

1.9.2 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.

Gear1

Pick-up

Short circuit

*Please refer to the disassembly method for details.

CN101

Main board

1-6 (No.YD034)