JVC NX-HD10 Service Manual

SERVICE MANUAL

COMPACT COMPONENT HDD SYSTEM

NX-HD10

STANDBY/ON

CLOCK

A.P.off

SLEEP

/TIMER

DISP/CHARA

1-MARK 2-ABC 3-DEF

CANCEL

4-GHI 5-JKL 6-MNO

SET

7-PQRS 8-TUV 9-WXYZ

ENTER

10 0 +10

HDD

TUNER

/LINE

REC START

SELECT

ALBUM

ALBUMLIBRARY

REPEAT

FM / PLAY

MODE

ALBUM

TONE

TITLE

AAC

CONTROL

/EDIT

AHB PRO

SOUND

DIMMER

VOLUME

CONTRAST

RM-SNXHD10J REMOTE CONTROL

SP-NXHD10 CA-NXHD10 SP-NXHD10

Contents

Safety precautions Preventing static electricity Important for laser products Importance administering point on the safety Disassembly method

1-2 1-3 1-4

1-5 1-6

J ------------------------- U.S.A.

Adjustment method Flow of functional operation until TOC read (CD) Maintenance of laser pickup Replacement of laser pickup Description of major ICs

Area Suffix

1-20

1-21 1-22 1-22 1-23~45

No.21155

Sep. 2002

1-1

NX-HD10

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These

characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

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

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

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

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Place this probe on each exposed metal part.

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.

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

1-2

NX-HD10

Preventing static electricity

1.Grounding to prevent damage by static electricity

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

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

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

2-1 Ground the workbench

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

2-2 Ground yourself

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

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

3. Handling the optical pickup

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

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

4.Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

Attention when traverse unit is decomposed

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

Shorting round

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

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

Flexible wire

Shorting round

CN601 on mechanism board

1-3

NX-HD10

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 laserradiation and is equipped with safety switches whichprevent 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.

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 an adjustment or operation check.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1 LASER PRODUCT

1-4

Importance administering point on the safety

NX-HD10

C9801

CN903

Q9801

R9801

Q9802

B2058

D9401

D9402

R9401

FT904

F9002

FT903

D9304

2.5A/125V

D9303

D9302

D9301

C9301

R9402

C9303

CN693

R9702

B2605

B2815

C9307

C9704

D9701

C9703

C9209

Q9702

R9704

C9308

R9705

Q9703

R9301

EP901

D9309

D9310

C9309

C9310

WC901

R9706

J9001

B2511

R9009

LVA10304-A3

FT909 FT910

F9009

LIVE

CN921

NEUTRAL

B2044

B2043

B2045

B2046

1.6A/125V

LF901

D+5.6V

MI+5.6V

B2322

C9305

D9306

D9305

C9304

C9302

B2320

INH

TRSW

SW+8V

DGND

B2607

B2411

B2225

CN995

FT902

B2216

F9001

8A/125V

D9308

D9307

FT901

B2959

B2958

POWER

SW+8V

DGND

HDDGND

FAN

CN994

B2905

C9604

C9601

D9601

B2961

R9601

C9605

B2960

C9603

D9602

B2508

B2510

B2604

D5.6V

AMPG

AMP+B

Q9201

IC961

R9607

C9210

R9608

CP961

C9602

C9205

C9202

D9201

Q9202 R9201

E R9202 R9203

R9602

R9204

C9206

B2814

B2317

C9204

B2603

B2602

C9201

B2315

LVA10304-A5

Q9701

E B E B

C9701

C9207

D9202

C9208

R9701

R9205

R9207

B2060

R9206

C9702

R9703

Q9203

C9203

B2503

C9306

Caution: For continued protection against risk of fire, replace only with same type 2.5A/125V for F9002, 8A/125V for F9001 and 1.6A/125V for F9009. This symbolspecifies type of fast operating fuse.

Precaution: Pour evitisques de fer reux, remplacez le fusible de surete de F9002 comme le meme type que 2.5A/125V, et 8A/125V pour F9001 et 1.6A/125V pour F9009. Ce sont des fusibles suretes qui functionnes rapide.

1-5

NX-HD10

Disassembly method

Removing the Top cover (See Fig.1,2)

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

Remove the screw B on each side of the body.

Remove the rear side of the top cover upward as shown in the figure while pulling both sides of the top cover outward.

Front panel

Top cover

Fig.1

Removing the HDD board assembly

(See Fig.3 and 4)

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

Disconnect the card wire from connector CN930 and CN931 on the HDD board assembly on the right side of the body.

Remove the two screws C and the two special screws D on top of the body.

Release the joint a on top of the body in the direction of the arrow. Move the rear side of the HDD board assembly upward and remove.

Front panel Joint a

Fig.2

HDD board assembly

CN930CN931

HDD board assembly

1-6

.3Fig.4

Removing the Front panel assembly

(See Fig.5~9)

Prior to performing the following procedure, remove the top cover and the HDD board assembly.

Disconnect the card wire from connector CN602 on the inside of the system control board on the left side of the body.

Remove the screw E on each side of the body.

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

Release the joint b on the bottom and the joint c on each side of the body using a screwdriver. Move the front panel assembly forward.

Release the wire extending from the headphone board under the front panel assembly from the two clamps. Set the front panel assembly apart from the body as far as possible.

Disconnect the wire from connector CN501 on the system control board and CN301 on the main amplifier board. Remove the front panel assembly.

Front panel assembly

Joint c

System control board

CN602

CN301

Main amp board

Fig.5

CN602

NX-HD10

Front panel assembly

Clamp

Fig.7

Front panel assemblyJoint b

CN501

Fig.6

Joint c

Front panel assembly

Clamp

Front panel assembly

CN301

Main amp board

.8 Fig.9

CN501

System control board

Headphone board

1-7

NX-HD10

Remove the Rear cover (See Fig.10~12)

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

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

Release the joint d on each lower side of the rear cover using a screwdriver.

Rear cover

Fig.10

Rear cover

Joint d

Fig.11

Rear cover

.12

Joint d

1-8

Remove the System control board/Card

wire sub board (See Fig.13,14)

Prior to performing the following procedure, remove the top cover, the HDD board assembly and the rear cover.

Remove the screw H attaching the card wire sub board on the left side of the body (The card wire sub board can be removed if only the top cover has been removed).

Disconnect the card wire from connector CN602 and CN605 on the system control board.

Remove the three screws I .

Disconnect the connector CN603 and CN604 outward and remove the system control board.

Disconnect the wire from connector CN501 on the inside of the system control board.

System control board

Card wire sub board

System control board

CN602 CN605 Front panel

Fig.13

CN603

NX-HD10

Removing the Card wire sub board/ Headphone board/ Heat sink

(See Fig.15~18)

Prior to performing the following procedure, remove the top cover, the HDD board assembly and the rear cover.

Remove the screw J on the right side of the body (The card wire sub board can be removed if only the top cover has been removed).

Disconnect the card wire from connector CN661 and CN695 on the main amplifier board.

CN501 CN604

Fig.14

CN661CN695

.15

Main

amplifier board

Card wire sub board

1-9

NX-HD10

Remove the screw K and the two screws L attaching the main amplifier board.

Main amplifier board

Remove the screw M on the back of the body.

Disconnect connector CN901 and CN904 on the main amplifier board, and remove the main amplifier board.

Disconnect the wire form connector CN301 on the inside of the main amplifier board. Remove the main amplifier board with the heat sink.

Remove the two screws N attaching the heat sink.

Release the bending parts at the two joints e and remove the heat sink.

Main amplifier board

System control board

Heat sink

CN901

Bracket

CN904

CN301

Fig.16

Main amplifier board

Fig.17

Removing the AC jack board (See Fig.19)

Prior to performing the following procedure, remove the top cover and the rear cover.

Disconnect the wire from connector CN921 on the AC jack board.

Remove the screw O attaching the AC jack board.

Fig.18

1-10

CN921

AC jack board

.19

NX-HD10

Removing the Regulator board

(See Fig.20)

Prior to performing the following procedure, remove the top cover, the HDD board assembly, the rear cover, the system control board and the main amplifier board.

Disconnect the wire from connector CN903 and CN955 on the back of the body.

Remove the four screws P attaching the regulator board.

Removing the Fan assembly (See Fig.21)

Prior to performing the following procedure, remove the top cover, the HDD board assembly, the rear cover, the system control board, the main amplifier board and the regulator board.

Remove the band setting the fan assembly wire on the back of the body.

Loosen the screw Q and remove the screw R attaching the fan assembly.

Regulator board

Fan assembly

attaching bracket

Fig.20

CN903

Fan assembly

CN99

Band

Removing the Power transformer assembly (See Fig.21~23)

Prior to performing the following procedure, remove the top cover, the HDD board assembly, the rear cover, the system control board, the main amplifier board and the regulator board.

Remove the four screws S attaching the fan assembly attaching bracket and the silicon steel plate. Release the two joints d backward and remove the fan assembly attaching bracket (The fan assembly will comes off at the same time).

Fig.21

Power transformer

Silicon steel plate

Fan assembly

attaching bracket

Joint d Joint d

Joint d

Fig.21-1 Fig.21-3 Fig.21-2

1-11

NX-HD10

Disconnect the wire from connector CN921 on the AC jack board.

Remove the four screws T attaching the power transformer assembly.

Removing the Relay board (See Fig.24)

Power transformer assembly

AC jack board

CN921

Fig.23

Relay board

Prior to performing the following procedure, remove the top cover, the HDD board assembly, the rear cover, the system control board and the main amplifier board.

Remove the two screws U on top of the body.

Fig.24

1-12

Removing the CD mechanism assembly

(See Fig.25~28)

Prior to performing the following procedure, remove the top cover, the HDD board assembly, the front panel assembly, the rear cover, the system control board, the main amplifier board, the regulator board, the fan assembly and the power transformer assembly.

Remove the five screws V attaching the CD mechanism cover.

Lift the front side of the CD mechanism cover to disengage the joint e on the rear side of the CD mechanism cover.

Remove the three screws W .

NX-HD10

Joint eAC jack board

CD mechanism cover

CD mechanism assembl

Fig.25

CD mechanism coverCD mechanism cover

Fig.27Fig.26

CD mechanism assembly

.28

1-13

NX-HD10

Prior to performing the following procedure, remove the top cover, the HDD board assembly and the front panel assembly.

Removing the Function switch board

(See Fig.29~31)

Remove the two screws X attaching the bracket.

Remove the eight screws Y attaching the function board.

Bracket

Function switch board

Fig.29

Function switch

board

Removing the Jack board (See Fig.31)

Remove the two screws Z and pull out the jack board toward the rear.

Fig.30

1-14

Jack board

.31

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