Jvc KD-DV7206-UT, KD-DV7206-UN, KD-DV7206-U, KD-DV7206-A, KD-DV7205-UT Service Manual

...

SERVICE MANUAL

DVD/CD RECEIVER

MA25020063

KD-ADV6270J,KD-DV6200J,KD-DV6201E,

KD-DV6201EU,KD-DV6202E,KD-DV6202EU,

KD-DV7205U,KD-DV7205UN,KD-DV7205UT,

KD-DV7205A,KD-DV7206U,KD-DV7206UN,

KD-DV7206UT,KD-DV7206A,KD-DV6207EE

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

No.MA250

2006/3

SPECIFICATION

KD-ADV6270/KD-DV6200

Power Output 20 W RMS × 4 Channels at 4 Ω and [< or =] 1% THD+N Signal to Noise Ratio 80 dBA (reference: 1 W into 4 Ω) 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

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

Line-Out Level/Impedance KD-ADV6270 : 5.0 V/20 kΩ load (full scale)

Output Impedance 1 kΩ

Subwoofer-out Level/Impedance KD-ADV6270 : 2.5 V/20 kΩ load (full scale)

Color system NTSC Video Output (composite) 1 Vp-p/75 Ω Other Terminals LINE IN, CD changer, 2nd AUDIO OUT

Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)

AM 530 kHz to 1 710 kHz (with channel interval set to 10 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

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

Signal Detection System Non-contact optical pickup (semiconductor laser) Number of Channels 2 channels (stereo) Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz

DVD, fs=96 kHz 16 Hz to 22 000 Hz

CD, fs=44.1 kHz 16 Hz to 20 000 Hz Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit DivX Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

MPEG Video Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 384 kbps

Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

WMA Bit Rate 32 kbps - 320 kbps

Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz WAV Quantization Bit Rate 16 bit

Sampling Frequency 44.1 kHz

Format FAT 12/16/32 Storage Less than 4 GB (1 partition type) Playable Audio Format MP3/WMA Max. Current Less than 500 mA MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 32 kHz

WMA Bit Rate 5 kbps - 320 kbps

Sampling Frequency 8 kHz - 48 kHz

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 (32°F to 104°F) Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 158 mm (7-3/16" × 2-1/16" × 6-1/4")

Panel Size (approx.) 188 mm × 58 mm × 11 mm (7-7/16" × 2-5/16" × 7/16") Mass (approx.) 1.7 kg (3.3 lbs) (excluding accessories)

AUDIO AMPLIFIER SECTION

Output level : -21 dBm to -15 dBm

KD-DV6200 : 2.5 V/20 kΩ load (full scale)

KD-DV6200 : 2.0 V/20 kΩ load (full scale)

TUNER SECTION

87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)

531 kHz to 1 602 kHz (with channel interval set to 9 kHz)

DVD/CD PLAYER SECTION

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

USB MEMORY

MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz MPEG-2.5 : 12 kHz, 11.025 kHz, 8 kHz

GENERAL

1-2 (No.MA250)

KD-DV6201/KD-DV6202

Maximum Power Output Front/Rear 50 W per channel Continuous Power Output (RMS) Front/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 Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm

Line-Out Level/Impedance 2.5 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 Video Output (composite) 1 Vp-p/75 Ω Other Terminals LINE IN, CD changer, 2nd AUDIO OUT

Frequency Range FM 87.5 MHz to 108.0 MHz

AM (MW) 522 kHz to 1 620 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 30 dB MW Tuner Sensitivity/Selectivity 20 µV/35 dB LW Tuner Sensitivity 50 µV

Signal Detection System Non-contact optical pickup (semiconductor laser) Number of Channels 2 channels (stereo) Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz

DVD, fs=96 kHz 16 Hz to 22 000 Hz

CD, fs=44.1 kHz 16 Hz to 20 000 Hz Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit DivX Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

MPEG Video Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 384 kbps

MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

WMA Bit Rate 32 kbps - 320 kbps

Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz WAV Quantization Bit Rate 16 bit

Sampling Frequency 44.1 kHz

Format FAT 12/16/32 Storage Less than 4 GB (1 partition type) Playable Audio Format MP3/WMA Max. Current Less than 500 mA MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 32 kHz

WMA Bit Rate 5 kbps - 320 kbps

Sampling Frequency 8 kHz - 48 kHz

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)

AUDIO AMPLIFIER SECTION

Output level : -21 dBm to -15 dBm

TUNER SECTION

(LW) 144 kHz to 279 kHz

DVD/CD PLAYER SECTION

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

720 × 576 pixels (25 fps)

Sampling Frequency : 32 kHz, 44.1 kHz, 48 kHz

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

USB MEMORY

MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz MPEG-2.5 : 12 kHz, 11.025 kHz, 8 kHz

GENERAL

(No.MA250)1-3

KD-DV7205/KD-DV7206

Level ±10 dB Signal to Noise Ratio 70 dB Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm

Line-Out Level/Impedance 2.5 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, 2nd AUDIO OUT

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 30 dB AM Tuner Sensitivity/Selectivity 20 µV/35 dB

Signal Detection System Non-contact optical pickup (semiconductor laser) Number of Channels 2 channels (stereo) Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz

DVD, fs=96 kHz 16 Hz to 22 000 Hz

CD, fs=44.1 kHz 16 Hz to 20 000 Hz Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit DivX Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

MPEG Video Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 384 kbps

MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

WMA Bit Rate 32 kbps - 320 kbps

Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz WAV Quantization Bit Rate 16 bit

Sampling Frequency 44.1 kHz

Format FAT 12/16/32 Storage Less than 4 GB (1 partition type) Playable Audio Format MP3/WMA Max. Current Less than 500 mA MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 32 kHz

WMA Bit Rate 5 kbps - 320 kbps

Sampling Frequency 8 kHz - 48 kHz

Panel Size (approx.) 188 mm × 58 mm × 11 mm Mass (approx.) 1.7 kg (excluding accessories)

AUDIO AMPLIFIER SECTION

Output level : -21 dBm to -15 dBm

TUNER SECTION

DVD/CD PLAYER SECTION

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

720 × 576 pixels (25 fps)

Sampling Frequency : 32 kHz, 44.1 kHz, 48 kHz

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

USB MEMORY

MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz MPEG-2.5 : 12 kHz, 11.025 kHz, 8 kHz

GENERAL

1-4 (No.MA250)

KD-DV6207

Level ±10 dB Signal to Noise Ratio 70 dB Audio Output Level Digital (DIGITAL OUT: Optical) Signal wave length : 660 nm

Line-Out Level/Impedance 2.5 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 Video Output (composite) 1 Vp-p/75 Ω Other Terminals LINE IN, CD changer, 2nd AUDIO OUT

Frequency Range FM1 /FM2 87.5 MHz to 108.0 MHz

FM3 65.00 MHz to 74.00 MHz

AM (MW) 522 kHz to 1 620 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 30 dB MW Tuner Sensitivity/Selectivity 20 µV/35 dB LW Tuner Sensitivity 50 µV

Signal Detection System Non-contact optical pickup (semiconductor laser) Number of Channels 2 channels (stereo) Frequency Response DVD, fs=48 kHz 16 Hz to 22 000 Hz

DVD, fs=96 kHz 16 Hz to 22 000 Hz

CD, fs=44.1 kHz 16 Hz to 20 000 Hz Dynamic Range 96 dB Signal-to-Noise Ratio 98 dB Wow and Flutter Less than measurable limit DivX Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

MPEG Video Video : Max. Resolution 720 × 480 pixels (30 fps)

Audio Bit Rate : 32 kbps - 384 kbps

Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 32 kHz, 44.1 kHz, 48 kHz

WMA Bit Rate 32 kbps - 320 kbps

Sampling Frequency 22.05 kHz, 32 kHz, 44.1 kHz, 48 kHz WAV Quantization Bit Rate 16 bit

Sampling Frequency 44.1 kHz

Format FAT 12/16/32 Storage Less than 4 GB (1 partition type) Playable Audio Format MP3/WMA Max. Current Less than 500 mA MP3 Bit Rate 32 kbps - 320 kbps

Sampling Frequency MPEG-1 : 48 kHz, 44.1 kHz, 32 kHz

WMA Bit Rate 5 kbps - 320 kbps

Sampling Frequency 8 kHz - 48 kHz

Panel Size (approx.) 188 mm × 58 mm × 11 mm Mass (approx.) 1.7 kg (excluding accessories)

AUDIO AMPLIFIER SECTION

Output level : -21 dBm to -15 dBm

TUNER SECTION

(LW) 144 kHz to 279 kHz

DVD/CD PLAYER SECTION

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

720 × 576 pixels (25 fps)

MPEG-2 : 16 kHz, 22.05 kHz, 24 kHz

USB MEMORY

MPEG-2 : 24 kHz, 22.05 kHz, 16 kHz MPEG-2.5 : 12 kHz, 11.025 kHz, 8 kHz

GENERAL

Design and specifications are subject to change without notice.

(No.MA250)1-5

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.

1-6 (No.MA250)

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 laser products. 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) 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.

1.4 Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the pickup unit.

• Apply solder to the short land before the flexible wire is disconnected from the connector on the pickup unit. (If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.

Flexible wire

CN101

Short-circuit points

Mechanism control board

(No.MA250)1-7

1.5 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)

1-8 (No.MA250)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA250)1-9

SECTION 3

DISASSEMBLY

3.1 Main body section

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

(1) Push the control panel release button in the lower left part

of the front panel assembly and remove the front panel assembly.

(2) Take out the front panel assembly.

3.1.2 Removing the bottom cover (See Fig.2)

(1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the joints a

on the left side, joints b on the right side and joint c on the back side of the main body, then remove the bottom cover from the main body.

Caution:

When releasing the joints using a screwdriver, do not damage the main board. When remove the bottom cover, do not missing the cooling rubber.

Front panel assembly

Control panel release button

Fig.1

Bottom cover

Fig.2

1-10 (No.MA250)

3.1.3 Removing the front chassis assembly

(See Figs.3 and 4)

• Remove the front panel assembly and bottom cover.

(1) Remove the two screws A on the front side of the main

body. (See Fig.3)

(2) Remove the two screws B on the both sides of the main

body. (See Fig.4)

(3) Release the joints d and joints e on the both sides of the

main body, and then remove the front chassis assembly toward the front. (See Fig.4)

Front chassis assembly

Fig.3

3.1.4 Removing the side panel

(See Fig.5)

Reference:

Remove the front panel assembly as required. (1) Remove the two screws C and two screws D attaching the

side panel on the left side of the main body.

(2) Take out the side panel from the main body.

Front chassis assembly

Fig.4

C CD D

Side panel

Fig.5

(No.MA250)1-11

3.1.5 Removing the rear bracket (See Fig.6) [except KD-DV6201]

• Remove the bottom cover.

(1) Remove the five screws E, one screw F, two screws G and

two screws G attaching the rear bracket on the back side of the main body.

(2) Take out the rear bracket.

3.1.6 Removing the rear bracket (See Fig.6) [For KD-DV6201]

• Remove the bottom cover.

(1) Remove the six screws E, one screw F, two screws G and

two screws G attaching the rear bracket on the back side of the main body.

(2) Take out the rear bracket.

for except KD-DV6201

Rear bracket

for KD-DV6201

Composite cable

Rear bracket

Composite cable

HP cable

Fig.6

Anntena cord

1-12 (No.MA250)

3.1.7 Removing the main board

(See Figs.6 to 8)

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

assembly and side panel. (1) Remove the five screws E except KD-DV6201 or six

screws E for KD-DV6201 attaching the rear bracket on the back side of the main body. (See Fig.6.)

(2) Remove the three screws J attaching the main board. (See

Fig.7)

(3) Disconnect the connector CN961

board. (See Fig.7)

(4) Remove the one screw K attaching the USB board. (See

Fig.8)

Reference:

Remove the rear bracket as required.

and take out the main

Main board

Fig.7

DVD mechanism assembly

3.1.8 Removing the DVD mechanism assembly

(See Fig.9)

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

assembly, side panel, main board and CD mechanism control board. (1) Remove the three screws L attaching the top chassis. (2) Take out the DVD mechanism assembly.

Main board

DVD mechanism assembly

Fig.8

Top chassis

Fig.9

(No.MA250)1-13

3.1.9 Removing the switch board (See Figs.10 to 13)

• Remove the front panel assembly.

(1) Release the main volume knob from the front panel assem-

bly. (See Fig.10)

(2) Remove the five screws M and one screw N attaching the

front panel assembly. (See Fig.11)

(3) Release the nine joints f and take out the rear cover. (See

Fig.12)

(4) Lift the switch board from the front panel assembly little by

little and take out the switch board. (See Fig.13)

Front panel assembly

Volume knob

Fig.10

Rear cover

Fig.11

Rear cover

Fig.12

Switch board

1-14 (No.MA250)

Fig.13

3.2 DVD mechanism assembly

3.2.1 Removing the mechanism control board

(See Fig.1)

Caution:

Before disconnecting the flexible wire extending from the DVD pickup, solder the short-circuit point on the flexible wire using a grounding soldering iron. If you do not follow this instruction, the DVD pickup may be damaged. (1) Turn over the body, and solder the short-circuit points on

the flexible wire extending from the DVD pickup.

(2) Disconnect the flexible wire from connector CN101

mechanism control board.

(3) Disconnect the card wire from connector CN201

mechanism control board.

(4) Disconnect the flexible wire from connector CN202

mechanism control board.

(5) Unsolder two soldered points a on the mechanism control

board and remove the wire extending from the feed motor. (6) Remove the screw A attaching the lug wire. (7) Remove the two screws B and screw C attaching the

mechanism control board.

Caution:

• As the flexible wire to be connected to CN101

attach it to the mechanism control board using a double tape.

• After reassembling, unsolder the short-circuit points.

on the

, make sure to

Flexible wire

Double tape

CN101

Short-circuit points

Lug wire

CN201

Feed motor

CN202

Mechanism control board

Fig.1

(No.MA250)1-15

3.2.2 Removing the top cover (See Fig.2)

(1) Remove the two screws D attaching the top cover on the

back of the body.

(2) Remove the top cover upward.

Reference:

When reassembling, set part b of the top cover under the bending part c of the chassis frame.

3.2.3 Removing the mechanism section (See Fig.2 to 4)

• Remove the top cover.

(1) From the bottom of the body, remove the screw E attaching

the lug wire. (See Fig.2.)

(2) Remove the two screws F attaching the right and left stop-

pers on the front side. (See Fig.2.)

(3) Remove the two floating springs on the bottom of the body.

(See Fig.3.)

(4) Move the mechanism section upward and remove from the

chassis frame. The three damper springs come off from the dampers. (See Fig.4.)

Caution:

• When reassembling, reattach the damper spring to the damper respectively and insert the three shafts on the bottom of the mechanism to the dampers.

• Before inserting the shaft to the dampers, apply IPA to the hole of damper.

Floating spring

Fig.3

Mechanism section

Stopper

Top cover

Stopper

Lug wire

Damper SP.(F)

(Silver)

Damper (F) (Black)

Damper SP.(F)

(Silver)

Damper (F) (Black)

Fig.4

Damper SP.(R)

(Red)

Damper (R) (Purple)

Chassis frame

1-16 (No.MA250)

Fig.2

3.2.4 Removing the clamper unit (See Fig.5 to 7)

• Remove the top cover and the mechanism section.

(1) Remove the clamper2 spring on the bottom of the mecha-

nism section. (See Figs.5.and 6.)

(2) Release the part d of the clamper spring from the bending

part of the chassis base assembly. (See Fig.7.)

(3) Move the clamper unit in the direction of the arrow and turn.

Release the two joints e and f, then remove the clamper unit upward. (See Fig.6.)

3.2.5 Reattaching the clamper unit (See Fig.5 to 9)

(1) Attach the clamper spring to the clamper unit. (See Fig.8.) (2) Move the clamper unit to set the side joints e and f to each

boss of the chassis base assembly. Make sure that part g is inserted to the notch of the chassis base assembly. (See Figs.5 and 9.)

(3) Move the part d of the clamper spring to the outside of the

bending part of the chassis base assembly. (See Fig.7.)

(4) Attach the clamper2 spring to the chassis base assembly.

(See Figs.5 and 6.)

Caution:

When reattaching, temporarily hook the end of the clamper spring as shown in the figure to make the work easy. (See Fig.8.)

Clamper unit

Clamper2 spring

Chassis base assembly

Fig.6

Clamper spring

Clamper2 spring

Chassis base assembly

Fig.7

Fig.5

(No.MA250)1-17

Clamper unit

Clamper spring

Fig.8

1-18 (No.MA250)

Fig.9

Notch

3.2.6 Removing the front unit (See Fig.10 to 12)

• Remove the top cover and the mechanism section.

(1) Disconnect the flexible wire from connector CN202

mechanism control board at the bottom of the body. (See Fig.10.)

(2) Remove the screw G attaching the front unit on the top of

the body. (See Fig.11.)

(3) Move the front unit toward the front to release joint h, and

release two joints i and j on the right side of the chassis base assembly. Then remove the front unit upward. (See Figs.11 and 12.)

(4) Remove the two screws H attaching the switch board. (See

Fig.12.)

Reference:

You can remove the switch board only without removing the front unit.

Caution:

When reassembling, attach the flexible wire extending from the switch board using the double tape. (See Figs.10 and 12.)

Mechanism control board

on the

Front unit

Fig.11

CN202

Double tape

Fig.10

Flexible wire

Double tape

Switch board

Front unit

Fig.12

(No.MA250)1-19

3.2.7 Removing the loading arm assembly (See Fig.13 , 14)

• Remove the top cover, the mechanism section and the front

unit. (1) From the top of the body, move the loading arm assembly

from the front side upward, and release the bosses from the right and left joints k and m of the chassis base assembly.

(2) Release the boss from notch n of the connect arm on the

right side of the body, and release the boss from notch p of the slide cam assembly on the left side.

Loading arm assembly

Side cam assembly

Fig.13

Loading arm assembly

Connect arm

1-20 (No.MA250)

Fig.14

3.2.8 Removing the rod (L)(R)/roller assembly

(See Fig.15 and 16)

• Remove the top cover, the mechanism section, the front unit

and the loading arm assembly. (1) Release the rod (L) and (R) from the joints q at the bottom

of the loading arm assembly (See Fig.15.)

(2) Remove the roller assembly from the loading arm assem-

bly. (See Fig.16.)

(3) Remove the two collars and washer from the roller assem-

bly. (See Fig.16.)

Caution:

After attaching the loading arm assembly to the roller assembly, attach the rod (L) and (R). Attach the rods to the right and left collars of the roller. (See Fig.15.) When reattaching the rod (L) and (R) to the loading arm assembly, engage each joint as shown in Fig.15. As joints q of the rod (L), let the rod through q before reattaching it.

Collar

Rod(R) Rod(L)

Collar

Rod(L)

Rod(R)

Loading arm assembly

Fig.15

Roller assembly

Loading arm assembly

Rod(L)

Collar

Washer

Rod(R)

Fig.16

(No.MA250)1-21

3.2.9 Removing the DVD pickup assembly (See Fig.17 to 19)

• Remove the mechanism control board.

(1) From the bottom of the body, turn the feed gear in the di-

rection of the arrow to move the DVD pickup outwards. (See Fig.17.)

(2) Remove the screw J attaching the thrust spring. (See

Fig.17.)

(3) Remove the DVD pickup assembly upward on the L.S.gear

side and release from sub shaft at joint r. Move the lead screw of the DVD pickup assembly in the direction of the arrow to release from joint s. (See Fig.18.)

Caution:

• When releasing the lead screw at joint s, the L.S.collar comes off at the end of the lead screw. When reassembling, reattach the L.S.collar to the lead screw and engage joint s. (See Fig.18.)

• When reattaching the L.S.collar, reattach it to the point s of the lead screw, and to the rod (M). Make sure that the L.S.collar is set on the rod (M) spring. (See Fig.18.)

(4) Remove the screw K attaching the rack spring/ rack plate

on the DVD pickup. (See Fig.19.)

(5) Pull out the lead screw. (See Fig.19.)

Caution:

Perform adjustment after replacing the pickup.

DVD Pickup assembly

Feed gear

Thrust spring

Fig.17

L.S.collar

Rod(M)

Lead screw

Sub shaft

L.S.collar

L.S.gear

Fig.18

Rack spring

Lead screw

Rack plate

DVD Pickup

Fig.19

1-22 (No.MA250)

3.2.10 Removing the spindle motor

(See Fig.20)

• Remove the mechanism control board. Remove the two screws L attaching the spindle motor on the bottom of the body.

Caution:

Perform adjustment when reattaching the spindle motor.

3.2.11 Removing the feed motor assembly

(See Fig.21 and 22)

• Remove the mechanism control board. (1) Remove the feed TRI. spring on the bottom of the body.

(See Fig.21.)

(2) Remove the two screws M attaching the feed motor as-

sembly. (See Fig.21.)

(3) Remove the slit washer from the motor H. assembly and

pull out the worm wheel. (See Fig.22.) Remove the two screws N attaching the feed motor. (See Fig.22.)

Spindle motor

Feed TRI. spring

Fig.20

Feed motor assembly

Fig.21

Slit washer

Worm wheel

Feed moto

Motor H. assembly

Fig.22

(No.MA250)1-23

SECTION 4

ADJUSTMENT

4.1 Test instruments required for adjustment

(1) Digital oscilloscope (199MHz) (2) Jitter meter (3) Digital tester (4) Electric voltmeter (5) Tracking offset meter (6) Test Disc : VT501 or VT502 (7) Extension studs : STDV001-3P (8) Extension cable : EXTDV002-30P

4.3 Connection method

Connection procedure

(1) Attach the front chassis assembly to the main board. (2) Connect the front panel assembly to the main board. (3) Attach the heat sink and rear bracket to the main board. (4) Attach the extension studs to the DVD mechanism assembly. (5) Connect the DVD mechanism assembly and the main board with a extension cable.

4.2 Standard measuring conditions

Power supply voltage DC14.4V(11 to 16V)

Load impedance 4Ω(2 Speakers connection) Line Output 20KΩ

Caution:

Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power. If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat.

Extension cable

EXTDV002-30P

Heat sink

Extension stud STDV001-3P

Extension studs STDV001-3P

1-24 (No.MA250)

4.4 Adjustment method for jitter

After replacing the pickup, set the unit in the service mode to display a jitter value on the LCD. Confirm that the jitter value measured with a jitter meter is within 12% of the jitter value displayed on the LCD. If it is within 12%, then adjustment is not necessary. If the measured jitter value is outside the 12% tolerance range, perform the following adjustments.

4.4.1 Adjustment procedure

(1) Set the unit to the service mode and display a jitter value (hex data) on the LCD. (2) Turn each of the screws a, b and c, by a half-turn per step, in the direction that reduces the jitter value in order to minimize it .

(Do not turn a screw more than a half turn at a time, but adjust the screws in the cycle of the same level is turned in the pair of

b+c and the same level is turned in the pair of a+b.)

(3) After completing the adjustment, secure the screws with screw lock paint.

Jitter value adjustment procedure (Pickup horizontal level adjustment relative to the DVD recording surface) (For the adjustment tool use a 3 mm wrench and not a screwdriver, this procedure will make the adjustment easier.)

3 mm wrench

(Do not turn a screw more than a half turn at a time, but adjust the screw in the cycle of same level turn by pair of b+c→ pair of

a+b.)

(3) After completing the adjustment, secure the screws with screw lock paint.

(No.MA250)1-25

4.5 Jitter value conversion table

Load the test DVD and set the unit to the service mode. A jitter value converted to the hex value is displayed on the LCD. Refer to the corresponding decimal notation value shown in the following Jitter Conversion Table. The adjustment is OK if the jitter value measured with a jitter meter is within 12% of the jitter value displayed on the LCD. If the measured jitter value is outside the 12% tolerance range, adjust it to minimize the difference between the measured value and the displayed value.

Indicated

on the LCD

EF56

EF22

EEEE

EEBA

EE86

EE52

EE1E

EDEA

EDB6

ED82

ED4E

ED1A

ECE6

ECB2

EC7E

EC4A

EC16

EBE2

EBAE

EB7A

EB46

EB12

EADE

EAAA

EA76

EA42

EA0E

E9DA

E9A6

E972

E93E

E90A

E8D6

E8A2

E86E

E83A

E806

E7D2

Jitter value

(%)

4.7

4.8

4.9

5.0

5.1

5.2

5.3

5.4

5.5

5.6

5.7

5.8

5.9

6.0

6.1

6.2

6.3

6.4

6.5

6.6

6.7

6.8

6.9

7.0

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

8.0

8.1

8.2

8.3

8.4

Indicated

on the LCD

E79E E76A E736 E702 E6CE E69A E666 E632 E5FE E5CA E596 E562 E52E E4FA E4C6 E492 E45E E42A E3F6 E3C2 E38E E35A E326 E2F2 E2BE E28A E256 E222 E1EE E1BA E186 E152 E11E E0EA E0B6 E082 E04E E01A

Jitter value

(%)

8.5

8.6

8.7

8.8

8.9

9.0

9.1

9.2

9.3

9.4

9.5

9.6

9.7

9.8

9.9

10.0

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

11. 0

11. 1

11. 2

11. 3

11. 4

11. 5

11. 6

11. 7

11. 8

11. 9

12.0

12.1

12.2

Indicated

on the LCD

DFE6 DFB2 DF7E DF4A DF16 DEE2 DEAE DE7A DE46 DE12 DDDE DDAA DD76 DD42 DD0E DCDA DCA6 DC72 DC3E DC0A DBD6 DBA2 DB6E DB3A DB06 DAD2 DA9E DA6A DA36 DA02 D9CE D99A D966 D932 D8FE D8CA D896 D862

Jitter value

(%)

12.3

12.4

12.5

12.6

12.7

12.8

12.9

13.0

13.1

13.2

13.3

13.4

13.5

13.6

13.7

13.8

13.9

14.0

14.1

14.2

14.3

14.4

14.5

14.6

14.7

14.8

14.9

15.0

15.1

15.2

15.3

15.4

15.5

15.6

15.7

15.8

15.9

16.0

1-26 (No.MA250)

Calculation

Indicated on the LCD Jitter (%)

E9A6 7.5

4.6 Service mode

4.6.1 Standard input/output conditions

Power supply voltage DC14.4V(11 to 16V)

Load impedance 4Ω(2 Speakers connection) Line Output 20KΩ

4.6.2 Service mode setting procedure

(The DVD does not need to be loaded before starting the following procedure.)

[SOURCE] button

[DISC UP] button

[STANDBY/ON ATTENUATOR] button

(1) Press a [STANDBY/ON ATTENUATOR] button on a main unit and switch it on. (2) Keep this state more than 2 seconds while continuing pressing the [SEL] button, [STANDBY/ON ATTENUATOR] button and

[SOURCE] button sequentially.

(3) This unit is set by a service mode.

*Exchanging it operate a menu of a service mode with the [DISC UP] button and [DISC DOWN] button.

Operate choice of a menu with a [SEL] button.

[SEL] button

[DISC DOWN] button

4.6.3 Operation procedures

Keep this state more than 2 seconds while continuing pressing the [SEL] button, [STANDBY/ON ATTENUATOR] button and [SOURCE] button sequentially.

The unit enters the service mode.

"INIT ALL" is Press the [SEL] key Initialize all data to the factory setting indicated on the LCD.

"VERSION" is Press the [SEL] key Microcomputer version display indicated on the LCD.

"AREA/RGN" is Press the [SEL] key Destination area/region display indicated on the LCD.

:The system control EEPROM is initialized entirely.

S-XXX-YY System control CPU

version/ROM correction version

DVD-XXXX DVD version USB-XXXXφ USB version

*Exchanging it operate each indication with the [DISC UP] button and [DISC DOWN] button.

STS-X XX System control destination DVD-X XX DVD unit destination DVDRGN X DVD unit region *Exchanging it operate each indication with the [DISC UP] button and [DISC DOWN] button.

(No.MA250)1-27

+ 60 hidden pages