JVC KD-AVX1 User Manual 2

SERVICE MANUAL

DVD/CD RECEIVER

MA16520055

KD-AVX1

Area suffix

J ------------- Northern America
E ------------- Southern Europe
A ------------------------ Australia
UT ------------------------- Taiwan
UN --------------------- Indonesia
U -------------------- Other Areas

KD-AVX1

OK

DISP

SOURCE

MENU

D

T/P

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

BACK

BAND

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.MA165

2005/5

SPECIFICATION

for NORTHERN AMERICA version

AUDIO AMPLIFIER SECTION

Power Output 20 W RMS

Signal to Noise Ratio 80 dBA (reference: 1 W into 4

Load Impedance 4

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

Level ±10 dB

Line-In Level/Impedance 1.5 V/20 k

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

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

Color System NTSC

Video Input (composite) 1 Vp-p/75

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals 2nd AUDIO OUT, DIGITAL OUT (optical), CD changer, Steering wheel re-

TUNER SECTION

Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 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

50 dB Quieting Sensitivity 16.3 dBf (1.8

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

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 16 Hz to 22 000 Hz

DVD fs=96 kHz 16 Hz to 44 000 Hz

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

Dynamic Range 93 dB

Signal-to-Noise Ratio 95 dB

Wow and Flutter Less than measurable limit

MP3 Max. Bit Rate 320 kbps

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

MONITOR SECTION

Screen 3-inch liquid crystal panel

Number of Pixels 123 200 pixels

Drive Method TFT (Thin Film Transistor) active matrix format

Color system NTSC

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

Grounding System Negative ground

Allowable Operating Temperature 0

Dimensions (W

Mass (approx.) 2.0 kg (4.5 lbs) (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm (7-3/16" × 2-1/16" × 6-5/16")

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω

mote input (OE REMOTE)

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)

µV

GENERAL

° C to +40° C (32° F to 104° F)

× 4 Channels at 4 Ω and [< or =] 1% THD+N

Ω)

Ω load
Ω load (full scale)

Ω

µV/75 Ω)
µV/75 Ω)

× 58 mm × 18 mm (7-7/16" × 2-5/16" × 3/4")

1-2 (No.MA165)

for EUROPE version

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 20 W per channel into 4

harmonic distortion.

Rear 20 W per channel into 4

harmonic distortion.

Load Impedance 4

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

Line-In Level/Impedance 1.5 V/20 k

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

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

Color System PAL

Video Input (composite) 1 Vp-p/75

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals 2nd AUDIO OUT, DIGITAL OUT (optical), CD changer, Steering wheel re-

TUNER SECTION

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

50 dB Quieting Sensitivity 16.3 dBf (1.8

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 35 dB

Capture Ratio 1.5 dB

MW Tuner Sensitivity 20

Selectivity 35 dB

LW Tuner Sensitivity 50

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 16 Hz to 22 000 Hz

DVD fs=96 kHz 16 Hz to 44 000 Hz

VCD, CD 16 Hz to 20 000 Hz

Dynamic Range 93 dB

Signal-to-Noise Ratio 95 dB

Wow and Flutter Less than measurable limit

MP3 Max. Bit Rate 320 kbps

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

MONITOR SECTION

Screen 3-inch liquid crystal panel

Number of Pixels 123 200 pixels

Drive Method TFT (Thin Film Transistor) active matrix format

Color System PAL

GENERAL

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

Grounding System Negative ground

Allowable Operating Temperature 0

Dimensions (W

Mass (approx.) 2.0 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load
Ω load (full scale)

Ω

Ω

mote input (OE REMOTE)

(LW) 144 kHz to 279 kHz

µV/75 Ω)
µV/75 Ω)

µV

µV

°C to +40°C

× 58 mm × 18 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

(No.MA165)1-3

for ASIA & AUSTRALIA version

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 20 W per channel into 4

harmonic distortion.

Rear 20 W per channel into 4

harmonic distortion.

Load Impedance 4

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

Line-In Level/Impedance 1.5 V/20 k

Line-Out Level/Impedance 5.0 V/20 k

Output Impedance 1 k

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

Color System NTSC/PAL

Video Input (composite) 1 Vp-p/75

Video Output (composite) 1 Vp-p/75 Ω

Other Terminals 2nd AUDIO OUT, DIGITAL OUT (optical), 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

50 dB Quieting Sensitivity 16.3 dBf (1.8

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

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 16 Hz to 22 000 Hz

DVD fs=96 kHz 16 Hz to 44 000 Hz

VCD, CD 16 Hz to 20 000 Hz

Dynamic Range 93 dB

Signal-to-Noise Ratio 95 dB

Wow and Flutter Less than measurable limit

MP3 Max. Bit Rate: 320 kbps

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

MONITOR SECTION

Screen 3-inch liquid crystal panel

Number of Pixels 123 200 pixels

Drive Method TFT (Thin Film Transistor) active matrix format

Color system NTSC/PAL

GENERAL

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

Grounding System Negative ground

Allowable Operating Temperature 0

Dimensions (W

Mass (approx.) 2.0 kg (excluding accessories)

× H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm

Panel Size (approx.) 188 mm

Ω (4 Ω to 8 Ω allowance)

Ω load
Ω load (full scale)

Ω

Ω

µV/75 Ω)
µV/75 Ω)

µV

°C to +40°C

× 58 mm × 18 mm

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

Ω, 40 Hz to 20 000 Hz at no more than 0.8% total

Design and specifications are subject to change without notice.

1-4 (No.MA165)

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.MA165)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 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

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) 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.

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

1-6 (No.MA165)

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.MA165)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MA165)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the panel assembly
(See Fig.1)

(1) Push the button(detach) in the lower right part of the panel

assembly.

(2) Remove the panel assembly.

3.1.2 Removing the side heat sink
(See Fig.2)

Reference:

Remove the panel assembly as required.

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

A and three screws B attaching the side heat sink.

(2) Remove the side heat sink from the main body.

Panel assembly

Side heat sink

Button(detach)

Fig.1

B

B

A

Fig.2

(No.MA165)1-9

3.1.3 Removing the top chassis assembly
(See Figs.3 to 6)

• Remove the panel assembly and side heat sink.

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

C attaching the top chassis assembly. (See Fig.3.)

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

screws C attaching the top chassis assembly. (See Fig.4.)

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

screws C and screw D attaching the top chassis assembly.
(See Figs.5 and 6.)

(4) Lift the top chassis assembly in the direction of the arrow

and disconnect the connector CN966
board from the connector CN961
Fig.6.)

(5) Take out the top chassis assembly from the main body.

on the main sub

on the main board. (See

Top chassis assembly

C

Top chassis assembly

C

Fig.3

C

Fig.4

Top chassis assembly

C D

Fig.5

Top chassis assembly

Main board

Fig.6

Main sub board

CN961

C

CN966

1-10 (No.MA165)

3.1.4 Removing the front chassis assembly

(See Fig.7)

• Remove the panel assembly, side heat sink and top chassis

assembly.
(1) From the both sides of the top chassis assembly, remove

the two screws E attaching the front chassis assembly.

(2) Remove the front chassis assembly from the top chassis

assembly.

3.1.5 Removing the DVD mechanism assembly

(See Figs.8 and 9)

• Remove the panel assembly, side heat sink and top chassis

assembly.

Reference:

Remove the front chassis assembly as required.

(1) From the inside of the top chassis assembly, remove the

three screws F attaching the DVD mechanism assembly
and take out the DVD mechanism assembly. (See Fig.8.)

(2) From the side of the DVD mechanism assembly, remove

the double-stick tape fixing the insulator. (See Fig.9.)

(3) From the top side of the DVD mechanism assembly, re-

move the spacer attaching the insulator. (See Fig.9.)

(4) Remove the insulator from the top chassis assembly.

Reference:

When the resolution of DVD mechanism assembly is done se­quentially, remove the main sub board. (See next Fig.10.)

Top chassis assembly

E E

Front chassis assembly

DVD mechanism assembly

F

Fig.7

F

Top chassis assembly

Insulator

Double-stick tape

F

Fig.8

Spacer

Double-stick tape

Fig.9

(No.MA165)1-11

3.1.6 Removing the main sub board
(See Fig.10)

• Remove the panel assembly, side heat sink, top chassis as-

sembly and DVD mechanism assembly.
(1) From the top side of the DVD mechanism assembly, re-

lease the lock of the connector CN965
board and disconnect the card wire.

(2) Remove the two screws G attaching the main sub board on

the DVD mechanism assembly and remove the main sub
board.

Reference:

When attaching the main sub board, align the projections a in
the holes of the main sub board before attaching the screws G.

3.1.7 Removing the loading unit assembly
(See Fig.11)

• Remove the panel assembly, side heat sink and top chassis

assembly.
(1) From the inside of the main body, disconnect the wire from

the connector CN881

(2) Remove the two screws H attaching the loading unit as-

sembly.

(3) Remove the tension spring and take out the loading unit

assembly.

Note:

When disassembling, do not lose the tension spring.

on the main board.

on the main sub

a

G

Lock

Main board

Main sub board

CN965

DVD mechanism assembly

Fig.10

Motor bracket assembly

CN881

a

G

H

3.1.8 Removing the arm bracket assemblies (L)/(R)
(See Fig.12)

• Remove the panel assembly, side heat sink, top chassis as-

sembly and loading unit assembly.
(1) Remove the two screws J and screw K attaching the arm

bracket assembly (L).
(2) Take out the arm bracket assembly (L).
(3) Remove the two screws J and screw K attaching the arm

bracket assembly (R).
(4) Take out the arm bracket assembly (R).

3.1.9 Removing the front bracket assembly
(See Fig.12.)

• Remove the panel assembly, side heat sink and top chassis

assembly.
(1) Release the lock of the connector CN962

board in an upward direction and disconnect the flexible
wire.

(2) Remove the four screws K attaching the front bracket as-

sembly and take out the front bracket assembly.

on the main

Fig.11

Arm bracket assembly (L)

Main board

J

CN962

Tension spring

H

Arm bracket assembly (R)

J

Lock

1-12 (No.MA165)

Front bracket assembly

K

K

Fig.12

3.1.10 Removing the connector board

(See Figs.13 to 15)

• Remove the panel assembly, side heat sink, top chassis as-

sembly and front bracket assembly.
(1) From the front side of the front bracket assembly, remove

the two screws M. (See Fig.13.)

(2) Remove the joints b and remove the detach lever from the

front bracket assembly. (See Fig.13.)

Reference:

When attaching the detach lever, insert the end of the
torsion spring in the hole c of the front bracket assembly.
(See Fig.13.)

(3) From the back side of the front bracket assembly, remove

the screw N attaching the connector cover. (See Fig.14.)

(4) Remove the connector cover in the direction of the arrow

while releasing the tabs d in an upward direction. (See
Fig.14.)

(5) Remove the reinforce plate and take out the connector

board from the front bracket assembly. (See Fig.15.)

Front bracket assembly

Fig.13

Connector cover

d

N

Fig.14

Connector board

M

Detach lever

Torsion spring

b

c

b

d

Reinforce plate

Front bracket assembly

Fig.15

(No.MA165)1-13

3.1.11 Removing the main board
(See Figs.16 and 17)

• Remove the panel assembly, side heat sink, top chassis as-

sembly, loading unit assembly and arm bracket assemblies
(L)/(R).
(1) From the back side of the main body, remove the screw P

attaching the rear bracket. (See Fig.16.)

(2) From the top side of the main body, take out the rod gear.

(See Fig.17.)

Reference:

When attaching the rod gear, attach the washers with it
as before. (See Fig.17.)

(3) Release the lock of the connector CN962

board in an upward direction and disconnect the flexible
wire. (See Fig.17.)

(4) Release the lock of the connector CN891

the card wire. (See Fig.17.)

(5) Remove the three screws P attaching the main board to the

bottom chassis assembly. (See Fig.17.)

(6) Take out the main board from the bottom chassis assem-

bly.

Reference:

When attaching the main board, attach the main board under
the sections e of the bottom chassis assembly as before. (See
Fig.17.)

on the main

and disconnect

Rear bracket

Bottom chassis assembly

Rod gear

Washer

P

P

Fig.16

e

CN962

Lock

e

Washer

Lock

P

Main board

CN891

Fig.17

1-14 (No.MA165)

3.1.12 Removing the rear bracket

(See Fig.18)

• Remove the panel assembly, side heat sink, top chassis as-

sembly, loading unit assembly, arm bracket assemblies (L)/(R)
and main board.
(1) From the back side of the main board, remove the two

screws Q attaching the rear heat sink.

(2) Remove the three screws R, screw R' and screw S attach-

ing the rear bracket.

Reference:

When attaching the screw R', attach the wire holder with
it as before.

(3) Remove the joints f of the rear bracket in the direction of

the arrow.

(4) Remove the car cable in the direction of the arrow from the

rear bracket.

3.1.13 Removing the panel switch board

(See Fig.19)

• Remove the panel assembly, side heat sink, top chassis as-

sembly, loading unit assembly, arm bracket assemblies (L)/(R)
and main board.
(1) From the inside of the bottom chassis assembly, take out

the insulator.

(2) Remove the two screws T attaching the panel switch

board.

(3) Take out the panel switch board from the bottom chassis

assembly.

Wire holder

R'

Rear bracket

Insulator

Car cable

R

Rear heat sink

Q

Fig.18

Panel switch board

R

f

S

Bottom chassis assembly

Fig.19

T

(No.MA165)1-15

3.1.14 Removing the panel board
(See Figs.20 and 21)

• Remove the panel assembly.

(1) From the back side of the panel assembly, remove the sev-

en screws U attaching the rear cover to the panel assem­bly. (See Fig.20.)

(2) From the inside of the rear cover, release the lock of the

connector CN582
card wire. (See Fig.21.)

(3) Remove the five screws V attaching the panel board and

take out the panel board from the rear cover. (See Fig.21.)

3.1.15 Removing the switch board
(See Figs.20 and 22)

• Remove the panel assembly.

(1) From the back side of the panel assembly, remove the sev-

en screws U attaching the rear cover to the panel assem­bly. (See Fig.20.)

(2) From the inside of the panel assembly, release the lock of

the connector CN583
the card wire. (See Fig.22.)

(3) Take out the switch board from the panel assembly.Take

out the switch board from the panel assembly.

Note:

Do not lose the compression spring when taking out the switch
board. (See Fig.22.)

on the panel board and disconnect the

on the switch board and disconnect

U

U

Panel board

V

Rear cover

Fig.20

Rear cover

CN582

U

Front panel assembly

Lock

V

V

Fig.21

Lock

Compression spring

CN583

Fig.22

Panel assembly

Switch board

1-16 (No.MA165)

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

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.MA165)1-17

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

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

1-18 (No.MA165)

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

Clamper spring

f

Clamper2 spring

Chassis base assembly

g

d

Chassis base assembly

Fig.7

e

Fig.5

(No.MA165)1-19

Clamper unit

Clamper unit

Clamper spring

Fig.8

1-20 (No.MA165)

Fig.9

g

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

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.MA165)1-21

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.

m

Loading arm assembly

Side cam
assembly

p

m

k

Fig.13

Loading arm assembly

k

n

n

Connect arm

1-22 (No.MA165)

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

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.MA165)1-23

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

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

1-24 (No.MA165)

3.2.10 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.

3.2.11 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

L

Fig.20

M

Feed motor assembly

Fig.21

Slit washer

Worm wheel

Feed moto

N

Motor H. assembly

Fig.22

(No.MA165)1-25

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 : EXTDV002-30P

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.

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 studs
STDV001-3P

Rear bracket

Extension stud
STDV001-3P

1-26 (No.MA165)