JVC KVDV-7 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

KV-DV7

Removing the main board

(See Fig.12 to 15)

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

Disconnect the wire from connector CN781 on the main board.

Remove the three screws G on the top of the body.

Remove the screw H on the back of the body.

Disengage the joint d in the lower right part of the rear panel and remove the rear panel with the main board (The fan assembly will be detached with the rear panel).

CAUTION:

When reattaching, engage the joint c to place the rear panel on the back of the bottom chassis.

Main board

Rear panel

CN781

Bottom chassis

Fig.12

Rear panel

Remove the two screws I and J attaching the main board to the rear panel.

Rear panel

Fig.15

Fig.13

Main board

Rear panel

Joints d

Fig.14

1-7

KV-DV7

Removing the fan assembly

(See Fig.16 and 17)

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

REFERENCE:

Disconnect the wire from connector CN781 on the main board.

Remove the two screws K on the back of the body.

It is not unnecessary to remove the main board and the rear panel.

Rear panel

Fan assembly

CN781

Fig.16

Rear panel

Fig.17

Removing the control switch board

(See Fig.18)

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

Remove the three screws L attaching the control switch board on the back of the front panel assembly.

Disengage the three joints e of the front panel and the control switch board.

Joint d

Joint e

Front panel assembly

Control switch board

Fig.18

Joint e

1-8

KV-DV7

Replacing the DVD door flame

(See Fig.19 to 24)

Prior to performing the following procedure, remove the front panel assembly and the control switch board.

Remove each button on the back of the front panel.

Press the OPEN button on the front side of the front panel to open the DVD door.

Remove the six screws M attaching the DVD door flame on the back of the front panel.

Disengage the three joints f on the top of the DVD door flame using a screwdriver (-) to pull out the three bosses of the front panel. Peel off the two adhesive tapes at the same time.

Detach the bottom of the DVD door flame. Press the lock lever on the front side of the front panel and remove the DVD door flame from the gear.

CAUTION:

When reassembling, reattach the DVD door flame to the front panel with the two adhesive tapes while engaging the three joints f.

Eject button

Reset button

Front panel

DVD door flame

Control button

Power button

Fig.19

OPEN button

DVD door

Fig.20

Detach the lock lever from the front side, then from the gear. DVD door flame (remove from bottom)

DVD door flame

Fig.22

Front panel

Bosses

Joint f

Insert a screwdriver.

Joint f

Adhesive tapes

Fig.21

Lock lever

Joint f

DVD door flame

Adhesive tapes

DVD door flame

DVD door

Fig.23Fig.24

1-9

KV-DV7

Removing the DVD door

(See Fig.25 to 29)

Prior to performing the following procedure, remove the front panel assembly, the control switch board and the DVD door flame.

Remove the screw N attaching the gear assembly on the back of the front panel.

Pull out the DVD door shaft from the joint g of the DVD door and the front panel.

Remove the DVD door with the gear assembly.

Remove the spring through the notch h of the gear assembly bracket and remove the DVD door from the gear assembly.

CAUTION:

Do not lose the spring.

Reattaching the DVD door, reattach the spring through the notch h and hole i of the gear assembly bracket, then reassemble the DVD door and the gear assembly. Reattach them to the front panel.

Gear assembly

DVD door (Shaft)

Gear assembly

Joint g

DVD door

Fig.25

Fig.26

DVD door

1-10

DVD door

Spring

Hole i

Shaft

Bracket

Gear assembly

Bracket

Fig.27

DVD door

Spring

Notch h

Fig.28Fig.29

Adjustment method

This model dose not have adjustment. If you change printed circuit board or mechanism assembly, please check as folow as next.

Test instruments required for checking

(1) Digital oscilloscope (100MHz) (2) AM standard signal generator (3) FM standard signal generator (4) Stereo modulator (5) Electric voltmeter (6) Digital tester (7) Monitor (8) Test disc : VT-501 for DVD section

: CTS-1000 for CD section

Checking items

KV-DV7

(1) DVD section: Playback the test disc VT-501.

It should not have some noise on the audio signal or video signal.

(2) CD section : Playbcak the test disc CTS-1000.

It should not heve some noise on the audio signal.

1-11

KV-DV7

Description of major ICs

UPD780058GC-250 (IC701) : Micon

1. Pin layput

2. Pin function (1/2) Pin No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

EEPROM_CONT 37 38 39 40

61 ~ 80

Symbol

TEMP

AVSS

LCDCONT

D_OUT_MUTE

AVREF1

LCDDI/RXDO

LCDDO/TXDO

LCDCL/ASCK

JBUS_SI

JBUS_SO

JBUS_SCK

JBUS_CTRL+B

ANT_FM D_HOST

D_FM

SCK

RDY_FM

/HOST_RST

NTSC/PAL

E.VOL_SCK

E.VOL_DO

E.VOL_STB

V_MUTE A_MUTE

D_MUTE

LED_DISCIN

LED_DSP

LED_CD/DVD

LED_DVD

EEPROM_DO

VSS1

EEPROM_DI

EEPROM_CLK

FANCONT

LCDCE

60 ~ 41

1 ~ 20

I/O

I I

I O O

I O

I O O O O O O O O

I O O O O

40 ~ 21

Function Templature sensor Non connect Non connect Audio ground LCD control DIgital out mute Anarog reference voltage Communication for JIG LCD or PC Communication for JIG LCD or PC Communication for JIG LCD or PC J-BUS serial input J-BUS serial output J-BUS serial clock input Power supply for J-BUS control Communication for DVD mechanism Communication for DVD mechanism Communication for DVD mechanism Communication for DVD mechanism Communication for DVD mechanism Communication for DVD mechanism NTSC/PAL control (H:PAL L:NTSC) E. volume serial clock output E. volume data output E. volume strobe output Video mute output Audio mute output Audio mute input LED output for slot LED output for Real sonic or Remocon LED output for CD/DVD LED output for DVD Non connect Ground1 Non connect Non connect Non connect Fan control Non connect Non connect LCD chip select

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