JVC KD-DV6105, KD-DV6108 Service Manual

SERVICE MANUAL

DVD/CD RECEIVER

MA15820052

KD-DV6105,KD-DV6108

KD-DV6105

Area suffix

UT ------------------------- Taiwan UN --------------------------Asean U -------------------- Other Areas

KD-DV6108

Area suffix

A ------------------------ Australia UN --------------------------Asean

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

No.MA158

2005/2

SPECIFICATION

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz, 15 kHz

Level ±10 dB

Signal-to-Noise Ratio 70 dB

Audio Output Level Analog (2nd AUDIO OUT) 6 mW (at 16 Ω)

Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm

Output level : -21 dBm to -15 dBm

Line-Out Level/Impedance 5.0 V/20 kΩ load (full scale) Output Impedance 1 kΩ

Subwoofer-Out Level/Impedance 2.0 V/20 kΩ load (full scale)

Color System PAL/NTSC

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals LINE IN, CD changer

TUNER SECTION

Frequency Range FM 87.5 MHz to 108.0 MHz

AM 531 kHz to 1 602 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

Capture Ratio 1.5 dB

AM Tuner Sensitivity 20 µV

Selectivity 35 dB

DVD/CD PLAYER SECTION

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response DVD, fs=48 kHz/96 kHz 16 Hz to 22 000 Hz

VCD, CD, MP3, WMA 16 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 (MPEG Audio Layer 3) Max. Bit Rate: 320 kbps

WMA (Windows Media Audio) Max. Bit Rate: 192 kbps

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm

Panel Size (approx.) 188 mm × 58 mm × 11 mm

Mass (approx.) 1.7 kg (excluding accessories)

Design and specifications are subject to change without notice.

1-2 (No.MA158)

1.1 Safety Precautions

SECTION 1

PRECAUTIONS

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.

(No.MA158)1-3

1.2 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.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD 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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

(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.

1.3 Handling the traverse unit (optical pickup)

(1) Before disconnecting the flexible wire from the connector CN101

on the flexible wire.

Caution:

If you do not follow this instruction, the DVD pickup may be damaged.

(2) Disconnect the flexible wire from the connector CN101 (3) Remove the solders from the short-circuit points on the flexible wire after replacing the DVD pickup. (4) Connect the flexible wire to the connector CN101

Flexible wire

CN101

on the mechanism control board.

on the mechanism control board, solder the short-circuit points

1-4 (No.MA158)

Short-circuit points

Mechanism control board

1.4 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 CD,MD and DVD 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 defeated. 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 here in 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 LABELS

WARNING LABEL

CAUTION : Visible and Invisible

CLASS 1 LASER PRODUCT

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

ADVARSEL : Synlig og usynlig laserstråling når maskinen er åben eller interlocken fejeler. Undgå direkte eksponering til stråling. (d)

VARNING : Synlig och osynling laserstrålning när den öppnas och spärren är urkopplad. Betrakta ej strålen. (s)

VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömälle lasersäteilylle. Vältä säteen kohdistumista suoraan itseesi. (f)

(No.MA158)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MA158)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly (See Fig.1)

Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly.

3.1.2 Removing the bottom cover (See Fig.2)

Reference:

Remove the front panel assembly as required. (1) Release the two joints a, two joints b and joint c. (2) Remove the bottom cover from the main body.

Caution:

Do not damage the main board when releasing the joints using

a screwdriver or a similar tool.

Detach button

Front panel assembly

Fig.1

Bottom cover

Fig.2

(No.MA158)1-7

3.1.3 Removing the front chassis assembly (See Figs.3 and 4)

• Remove the front panel assembly and bottom cover.

(1) From the front side of the main body, remove the two

screws A attaching the front chassis assembly. (See Fig.3.)

(2) From the both sides of the main body, remove the two

screws B attaching the front chassis assembly. (See Fig.4.)

(3) Release the two joints d and two joints e. (See Fig.4.)

Front chassis assembly

Fig.3

3.1.4 Removing the side heat sink (See Fig.5)

Reference:

Remove the front panel and front chassis assemblies as re-

quired. From the left side of the main body, remove the two screws C and three screws D attaching the side heat sink.

Front chassis assembly

Fig.4

1-8 (No.MA158)

Side heat sink

Fig.5

3.1.5 Removing the rear bracket (See Fig.6)

• Remove the bottom cover.

(1) From the back side of the main body, remove the two

screws E, two screws E', screw F, two screws G and three screws H attaching the rear bracket.

(2) Remove the LINE IN, SUBWOOFER and AUDIO OUT ca-

bles from the rear bracket in the direction of the arrow.

Reference:

• When attaching the LINE IN and SUBWOOFER cables, insert them in the slots of the rear bracket and hang them on a wire holder.

• When attaching the screws E', attach the cable holders with them.

3.1.6 Removing the main board (See Figs.6 and 7)

• Remove the front panel assembly, bottom cover, front chassis

assembly and side heat sink.

Reference:

Remove the rear bracket as required.

(1) From the back side of the main body, remove the three

screws H attaching the main board. (See Fig.6.)

(2) From the bottom side of the main body, remove the three

screws J attaching the main board. (See Fig.7.)

(3) Disconnect the connector CN961

the DVD mechanism assembly and take out the main board from the main body. (See Fig.7.)

on the main board from

SUBWOOFER cable

Rear bracket

Cable holder

E' H

CN961

Slot

LINE IN cable

Wire holder

AUDIO OUT cable

HEE'

Fig.6

Slot

Cable holder

Rear bracket

3.1.7 Removing the DVD mechanism assembly (See Fig.8)

• Remove the front panel assembly, bottom cover, front chassis

assembly, side heat sink and main board. (1) From the inside of the top chassis, remove the three

screws K attaching the DVD mechanism assembly.

(2) Take out the DVD mechanism assembly from the top chas-

sis.

Main board

Fig.7

DVD mechanism assembly

Top chassis

Fig.8

(No.MA158)1-9

+ 21 hidden pages