JVC KD-DV7, KV-DV7 Service Manual

SERVICE MANUAL

DVD/CD PLAYER

KV-DV7

E J UF UT US A

Area Suffix

Continental Europe

Northern America

China

Taiwan

Singapore

Australia

Contents

Safety precaution Important for laser products Disassembly method Adjustment method Description of major ICs

1-2 1-3 1-4 1-11 1-12~17

No.49630

Apr. 2001

KV-DV7

Safety precaution

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.

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

1-2

Important for laser products

KV-DV7

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

DANGER : Invisibie laser radiation when open and interlock or defeated. AVOID DIRECT EXPOSURE TO BEAM (e)

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

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

ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (f)

1-3

KV-DV7

Disassembly method

< Main Body>

Removing the top cover (See Fig.1 to 3)

Remove the seven screws A on both sides and back of the body.

Detach the rear part of the top cover upward and release the joint a on the top side.

Top cover

Fig.1

Top cover

Fig.2

Joint a

Fig.3

Top cover

1-4

Removing the front panel assembly

(See Fig.4 to 6)

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

Remove the screw B attaching the ground on the top of the body.

KV-DV7

Remove the four screws C and two screws C' attaching the front panel assembly on both sides of the body.

Release the two joints b of the front panel assembly and the bottom chassis on both sides of the body and remove the front panel assembly toward the front.

The connector CN801 on the control switch board in the front panel assembly will be disconnected from the main board.

CAUTION:

When reassembling, attach the four screws C and then the two screws C'.

Front panel assembly

Fig.4

Joint b

Fig.5

Front panel assembly

Joint b

Fig.6

1-5

KV-DV7

Removing the DVD mechanism assembly (See Fig.7 to 11)

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

Remove the four screws D attaching the DVD mechanism assembly on the top of the body.

Remove the DVD mechanism assembly while holding the part c on each side of the assembly.

CAUTION:

Disconnect the card wire from connector CN721 and CN701 on the main board andremove the DVD mechanism assembly from the body.

To protect accuracy of the mechanism bracket on the front of DVD mechanism assembly, make sure to hold the part c on each side of the DVD mechanism assembly when removing or reassembling.

Joint c

Do not hold the mechanism bracket.

Fig.7

Main board

Joint c

DVD mechanism assembly

Remove the two screws E attaching the DVD mechanism bracket (1) on the front sideof the DVD mechanism assembly.

Remove the two screws F attaching the DVD mechanism bracket (2) on the rear sideof the DVD mechanism assembly.

CAUTION:

When reassembling the DVD mechanism assembly, attach the cooling rubber and the heat sink to the DVD mechanism board as shown in Fig.11 to make sure radiation of IC15 on the DVD mechanism board (Fig.11).

DVD mechanism board

CN701

DVD mechanism assembly

CN721

DVD mechanism assembly

Fig.8

DVD mechanism bracket (1)

Fig.9

DVD mechanism assembly

1-6

Heat sink

IC15

Cooling rubber

DVD mechanism bracket (2)

Fig.10Fig.11

+ 12 hidden pages