JVC KWAVX-800 Service manual

SERVICE MANUAL

DVD RECEIVER WITH MONITOR

MA32020075SERVICE MANUAL

KW-AVX800J, KW-AVX800E,

KW-AVX800EU, KW-AVX800EE,

KW-AVX800U, KW-AVX800UN,

KW-AVX800A

(for J)

(for J)

(for E,EU,EE)

COPYRIGHT © 2007 Victor Company of Japan, Limited

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

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

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37

COPYRIGHT © 2007 Victor Company of Japan, Limited

No.MA320

2007/5

SPECIFICATION

KW-AVX800J

AMPLIFIER

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, 2.5 kHz, 6.3 kHz, 15 kHz

Level ±10 dB

Audio Output Level LINE OUT
(FRONT/REAR)/CENTER OUT/SUBWOOFER

Color System NTSC

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals Input LINE IN, VIDEO IN, CAMERA IN, USB input terminal, Antenna input

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

FM (with channel interval set to 50 kHz) 87.5 MHz to 108.0 MHz
AM (with channel interval set to 10 kHz) 530 kHz to 1 710 kHz
AM (with channel interval set to 9 kHz) 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

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

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

Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit

Compatible File System FAT 32/16/12
Capacity 8 Mbytes to 2 Gbytes
Data Transfer Rate Maximum 10 Mbps

USB Standards USB 1.1
Data Transfer Rate Full Speed Maximum 12 Mbytes

Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current Less than 500 mA/5V

Screen Size 7 inch wide liquid crystal display

Number of Pixel 336 960 pixels: 480 × 3 (horizontal) × 234 (vertical)

Drive Method TFT (Thin Film Transistor) active matrix format
Color System NTSC/PAL
Aspect Ratio 16:9 (wide)

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground

Allowable Storage Temperature -10°C to +60°C (14°F to 140°F)
Allowable Operating Temperature 0°C to +40°C (32°F to 104°F)
Dimensions (W × H × D)

With trim plate and sleeve attached

Mass (approx.) 3 kg (6.7 lbs) (including trims and sleeve)

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

Output 2nd AUDIO OUT, VIDEO OUT
Others CD changer, OE REMOTE

FM/AM TUNER

DVD/CD

DVD, fs=192 kHz 16 Hz to 88 000 Hz
VCD/CD 16 Hz to 20 000 Hz

SD

USB

Low Speed Maximum 1.5 Mbytes

MONITOR

GENERAL

Installation Size (approx.) 182 mm × 111 mm × 160 mm (7-3/16" × 4-3/8" × 6-5/16")
Panel Size (approx.) 188 mm × 117 mm × 10 mm (7-7/16" × 4-5/8" × 7/16")

Design and specifications are subject to change without notice.

1-2 (No.MA320)

KW-AVX800E, KW-AVX800EU, KW-AVX800EE

AMPLIFIER

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%

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

Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz

Level ±10 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level LINE OUT

(FRONT/REAR)/CENTER OUT/ SUBWOOFER

Color System PAL

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals Input LINE IN, VIDEO IN, CAMERA IN, USB input terminal, Aerial input

Frequency Range FM 87.5 MHz to 108.0 MHz

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

MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV

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

Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit

Compatible File System FAT 32/16/12
Capacity 8 Mbytes to 2 Gbytes
Data Transfer Rate Maximum 10 Mbps

USB Standards USB 1.1
Data Transfer Rate Full Speed Maximum 12 Mbytes

Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current Less than 500 mA/5V

Screen Size 7 inch wide liquid crystal display

Number of Pixel 336 960 pixels: 480 × 3 (horizontal) × 234 (vertical)

Drive Method TFT (Thin Film Transistor) active matrix format
Color System NTSC/PAL
Aspect Ratio 16:9 (wide)

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground

Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D)

With trim plate and sleeve attached

Mass (approx.) 3 kg (including trims and sleeve)

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

Output Impedance 1 kΩ

Output 2nd AUDIO OUT, VIDEO OUT

Others CD changer, OE REMOTE

FM/AM TUNER

AM (MW) 522 kHz to 1 620 kHz

DVD/CD

DVD, fs=192 kHz 16 Hz to 88 000 Hz

VCD/CD 16 Hz to 20 000 Hz

USB

Low Speed Maximum 1.5 Mbytes

MONITOR

GENERAL

Installation Size (approx.) 182 mm × 111 mm × 160 mm

Panel Size (approx.) 188 mm × 117 mm × 10 mm

total harmonic distortion

(LW) 144 kHz to 279 kHz

SD

Design and specifications are subject to change without notice.

(No.MA320)1-3

KW-AVX800U, KW-AVX800UN, KW-AVX800A

AMPLIFIER

Maximum Power Output Front/Rear 50 W per channel

Continuous Power Output (RMS) Front/Rear 20 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than 0.8%

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

Equalizer Control Range Frequencies 60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz

Level ±10 dB
Signal-to-Noise Ratio 70 dB
Audio Output Level LINE OUT

(FRONT/REAR)/CENTER OUT/ SUBWOOFER

Color System NTSC/PAL

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals Input LINE IN, VIDEO IN, CAMERA IN, USB input terminal, Antenna input

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

AM Tuner Sensitivity/Selectivity 20 µV/35 dB

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

Dynamic Range 93 dB
Signal-to-Noise Ratio 95 dB
Wow and Flutter Less than measurable limit

Compatible File System FAT 32/16/12
Capacity 8 Mbytes to 2 Gbytes
Data Transfer Rate Maximum 10 Mbps
USB
USB Standards USB 1.1
Data Transfer Rate Full Speed Maximum 12 Mbytes

Compatible Device Mass storage class
Compatible File System FAT 32/16/12
Max. Current Less than 500 mA/5V

Screen Size 7 inch wide liquid crystal display

Number of Pixel 336 960 pixels: 480 × 3 (horizontal) × 234 (vertical)

Drive Method TFT (Thin Film Transistor) active matrix format
Color System NTSC/PAL
Aspect Ratio 16:9 (wide)

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground

Allowable Storage Temperature -10°C to +60°C
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size (approx.) 178 mm × 100 mm × 160 mm

Mass (approx.) 2.7 kg (including trims and sleeve)

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

Output Impedance 1 kΩ

Output 2nd AUDIO OUT, VIDEO OUT

Others CD changer

FM/AM TUNER

DVD/CD

DVD, fs=192 kHz 16 Hz to 88 000 Hz

VCD/CD 16 Hz to 20 000 Hz

Low Speed Maximum 1.5 Mbytes

MONITOR

GENERAL

Panel Size (approx.) 171 mm × 97 mm × 21 mm

total harmonic distortion

SD

Design and specifications are subject to change without notice.

1-4 (No.MA320)

1.1 Safety Precautions

SECTION 1

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.

(No.MA320)1-5

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

1M

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 card wire is disconnected from the connector on the pickup unit.
(If the card 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 card wire.

Flexible wire

1-6 (No.MA320)

CN101

Short-circuit points

Mechanism control board

1.5 Important for laser products

1.CLASS 1 LASER PRODUCT

2.CAUTION :

(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.

3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.

4.CAUTION : This laser product uses visible and/or 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 and PRINT

WARNING LABEL and PRINT

(No.MA320)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MA320)

SECTION 3

DISASSEMBLY

3.1 Main body

3.1.1 Removing the FRONT PANEL assembly
(See Fig.1 to 4)

(1) From the bottom side of main body, insert the screwdriver

to hole of the third gear from hole a of the bottom chassis,
and then turn the gear to clockwise until FRONT PANEL
assembly comes up. (See Fig.1)

(2) Remove the two screws A attaching the both side of the

FRONT PANEL assembly. (See Fig.2)

(3) Remove the four screws B attaching the both side of the

FRONT PANEL assembly. (See Fig.2)

(4) Remove the one screw C attaching the FPC GUIDE. (See

Fig.3)

(5) Remove the one screw D attaching the FRONT CHASSIS.

(See Fig.3)

(6) Disconnect the card wire from MONITOR assembly con-

nected to connector CN401
bly. (See Fig.4)

(7) Disengage two hooks a engaged FRONT CHASSIS. (See

Fig.2)

of the PANEL BOARD assem-

C

Fig.3

B

Fig.1

hook a

A

hole a

B

D

CN401

Fig.4

hook a

Fig.2

(No.MA320)1-9

3.1.2 Removing the HEAT SINK
(See Fig.5)

(1) Remove the four screws E and two screws F attaching the

HEAT SINK.

E

3.1.3 Removing the REAR BRACKET
(See Fig.6, 7)

(1) Remove the three screws G attaching the REAR HEAT

SINK. (See Fig.6)

(2) Remove the eleven screws H attaching the REAR BRACK-

ET. (See Fig.6)

(3) Disconnect the connector wire from FAN connected to con-

nector CN906

of the SUB BOARD assembly. (See Fig.7)

EE

F

Fig.5

G

HH HH

Fig.6

CN906

1-10 (No.MA320)

Fig.7

3.1.4 Removing the TOP CHASSIS assembly

(See Fig.8 to 11)

(1) Disconnect the card wire from TOP CHASSIS assembly

connected to connector CN702
sembly. (See Fig.8)

(2) Remove the two screws J attaching the FRONT BOARD

assembly. (See Fig.8)

(3) Disconnect the connector wire from MAIN BOARD assem-

bly connected to connector CN902
sembly. (See Fig.9)

(4) Disconnect the card wire from MAIN BOARD assembly

connected to connector CN904
sembly. (See Fig.9)

(5) From left side of MAIN BODY, remove the two screws K at-

taching the TOP CHASSIS assembly. (See Fig.10)

(6) From right side of MAIN BODY, remove the two screws L

attaching the TOP CHASSIS assembly. (See Fig.11)

of the MAIN BOARD as-

of the SUB BOARD as-

of the SUB BOARD as-

CN702

J

Fig.8

CN902CN904

Fig.9

K

Fig.10

K

LL

Fig.11

(No.MA320)1-11

3.1.5 Removing the MAIN BOARD assembly
(See Fig.12)

(1) Disconnect the connector wire from the MECHA SWITCH

BOARD assembly connected to connector CN764 of the
MAIN BOARD assembly.

(2) Remove the four screws M attaching the MAIN BOARD as-

sembly.

CN764

3.1.6 Removing the MID CHASSIS
(See Fig.13)

(1) Remove the four screws N attaching the MID CHASSIS.

M

Fig.12

M

NN

3.1.7 Removing the SUB BOARD assembly
(See Fig.14, 15)

(1) Disconnect the card wire from CONNECTION BOARD as-

sembly connected to connector CN907
assembly. (See Fig.14)

(2) Remove the five screws P attaching the SUB BOARD as-

sembly. (See Fig.15)

of the SUB BOARD

Fig.13

CN907

Fig.14

P

PP

1-12 (No.MA320)

Fig.15

3.1.8 Removing the DVD MECHANISM assembly

(See Fig.16 to 18)

(1) Remove the two screws Q attaching the FRONT PCB

BRACKET. (See Fig.16)

(2) Remove the three screws R attaching the SUB PCB

BRACKET. (See Fig.17)

(3) Remove the three screws S attaching the DVD MECHA-

NISM assembly. (See Fig.18)

QQ

Fig.16

3.1.9 Removing the CONNECTION BOARD assembly

(See Fig.19)

(1) Takeout the INSULATOR.
(2) Disconnect the card wire from FRONTEND BOARD as-

sembly connected to connector CN301
CONNECTION BOARD assembly.

(3) Remove the four screws T attaching the CONNECTION

BOARD assembly.

and CN303 of the

S

S

T

CN301

R

Fig.17

S

Fig.18

T

T

CN303

T

Fig.19

(No.MA320)1-13

3.2 Monitor section

3.2.1 Removing the FRONT BRACKET assembly
(See Fig.1)

(1) Remove the two screws A attaching the FPC COVER.
(2) Remove the four screws B attaching the FRONT BRACK-

ET assembly.

(3) Remove the two screws C attaching he FRONT BRACKET

assembly.

3.2.2 Removing the PANEL BOARD assembly
(See Fig.2)

(1) Disconnect the connector wire from LCD module connect-

ed to connector CN471

(2) Disconnect the card wire from SWITCH BOARD assembly

connected to connector CN431
PANEL BOARD assembly.

(3) Remove the four screws D attaching the PANEL BOARD

assembly.

of the PANEL BOARD assembly.

, CN511 and CN591 of the

A

C

A

B

B

Fig.1

CN471

DD

3.2.3 Removing the LCD module
(See Fig.3)

(1) Remove the six screws E attaching the PANEL BRACKET

assembly. (See Fig.3)

(2) Disengage seven hook a engaged PANEL BRACKET.

E

hook a

CN431 CN511

Fig.2

hook

Fig.3

a

hook

a

CN591

E

EE

1-14 (No.MA320)

3.3 DVD mechanism assembly

3.3.1 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

on the

on the

, make sure to

Flexible wire

Double tape

CN101

B

Short-circuit points

A

Lug wire

B

CN201

Feed motor

a

C

CN202

Mechanism control board

Fig.1

(No.MA320)1-15

3.3.2 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.

3.3.3 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

F

Top cover

Stopper

F

D

D

b

c

E

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.MA320)

Fig.2

3.3.4 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.)

3.3.5 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

Clamper spring

f

Clamper2 spring

Chassis base assembly

g

d

Chassis base assembly

Fig.7

e

Fig.5

(No.MA320)1-17

Clamper unit

Clamper unit

Clamper spring

Fig.8

1-18 (No.MA320)

Fig.9

g

Notch

3.3.6 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

G

Front unit

h

Fig.11

CN202

Double tape

Fig.10

Flexible wire

Double tape

j

i

H

Switch board

Front unit

G

Fig.12

h

(No.MA320)1-19

3.3.7 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.

m

Loading arm assembly

Side cam
assembly

p

m

k

Fig.13

Loading arm assembly

k

n

n

Connect arm

1-20 (No.MA320)

Fig.14

3.3.8 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

Collar

Rod(R) Rod(L)

q

q

q

Collar

Rod(L)

Rod(R)

q

Loading arm assembly

Fig.15

Roller assembly

Loading arm assembly

q

Rod(L)

q

Collar

Washer

Rod(R)

Fig.16

(No.MA320)1-21

3.3.9 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

DVD Pickup assembly

Feed gear

J

Thrust spring

Fig.17

s

L.S.collar

Rod(M)

Lead screw

Sub shaft

L.S.collar

r

L.S.gear

Fig.18

K

Rack spring

Lead screw

Rack plate

DVD Pickup

Fig.19

1-22 (No.MA320)

3.3.10 Removing the spindle motor

r

(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.

3.3.11 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

L

Fig.20

M

Feed motor assembly

Fig.21

Slit washer

Worm wheel

Feed moto

N

Motor H. assembly

Fig.22

(No.MA320)1-23

SECTION 4

ADJUSTMENT

4.1 Test instruments required for adjustment

(1) Digital oscilloscope (100MHz)
(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 :

EXTJD001-60PF(CN401-CN301)

4.2 Standard measuring conditions

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

Load impedance : 4 Ω (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.

EXTJD001-14PF(CN404-CN303)
EXTDV002-44PF(CN305-CN702)
EXTDV002-7PF(CN302-CN907)
EXTXC004-20P(CN375-CN903)
EXTFP001-26P(CN376-CN701)
EXTCN001-6P(CN764-CN381)
EXTLX001-4P(CN703-CN902)
EXTDV001-23PF(CN705-CN904)

4.3 Connection method

Connection procedure

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

Bottom view

g

CN404

EXTJD001-60PF

h

CN375

EXTJD001-14PF

CN401

a

CN376

EXTXC004-20P

b

EXTFP001-26P

EXTCN001-6P

i

EXTDV002-44PF

CN305

f

CN381

e

EXTDV002-7PF

EXTDV002-44PF

CN301

CN302

EXTCN001-6P

CN764

f

EXTXC004-20P

EXTJD001-60PF

h

EXTJD001-14PF

CN303

i

CN702

CN701

b

EXTFP001-26P

CN903

a

g

EXTLX001-4P

CN703

CN907

e

EXTDV002-7PF

c

EXTDV001-23PF

CN705

EXTDV001-23PF

EXTLX001-4P

CN902

d

d

c

CN904

1-24 (No.MA320)