JVC MX-JD8 Service manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB28220047

MX-JD8

Area suffix

US ------------------------ Singapore
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UN ----------------------------- Asean

CA-MXJD8

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44

COPYRIGHT © 2004 Victor Company of Japan, Limited

No.MB282

2004/7

SPECIFICATION

Amplifier section Output Power FRONT MAIN SPEAKERS 55 W per channel, min. RMS, driven into 6 Ω at 1 kHz with

no more than 10% total harmonic distortion.

FRONT SUBWOOFERS 140 W per channel, min. RMS, driven into 6 Ω at 63 Hz with

no more than 10% total harmonic distortion.

CENTER SPEAKER 50 W, min. RMS, driven into 8 Ω at 1 kHz with no more than

10% total harmonic distortion.

SURROUND SPEAKERS 30 W per channel, min. RMS, driven into 16 Ω at 1 kHz with

no more than 10% total harmonic distortion.

Digital output OPTICAL DIGITAL OUT-

PUT

Audio input sensi­tivity/Impedance
(Measured at 1
kHz, with tape re­cording signal 300
mV)

VIDEO OUT Color system NTSC/PAL selectable

Speaker Terminals Front main speakers 6 Ω - 16 Ω

Others AV COMPU LINKx2 (Ø 3.5)

Tuner section FM tuning range 87.50 MHz - 108.00 MHz

AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)

Disc player section Playable disc DVD Video/DVD Audio/CD/VCD/SVCD

Dynamic range 90 dB

Horizontal resolution 500 lines

Wow and flutter Immeasurable

Cassette deck section Frequency response Normal (type I) 50 Hz - 14 000 Hz

Wow and flutter 0.15% (WRMS)

General Power requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V ,

Power consumption 325 W (at operation) 22 W (on standby)

Dimensions (approx.) 265 mm × 335 mm × 352 mm (W/H/D)

Mass (approx.) 9.1 kg

AUX IN 300 mV/47 kΩ
MIC 1/2 3.0 mV/50 kΩ

VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance):1 V(p-p)/75 Ω

COMPONENT (Interlace/
Progressive)

Center speakers 8 Ω - 16 Ω
Surround speakers 16 Ω - 32 Ω
Front subwoofers 6 Ω - 16 Ω

-21 dBm to -15 dBm (660 nm ±30 nm)

C (chrominance, burst):0.286 V(p-p)/75 Ω
(Y):1 V(p-p)/75 Ω
(PB/PR):0.7 V(p-p)/75 Ω

530 kHz - 1 710 kHz (at 10 kHz)

CD-R/CD-RW (recorded in Audio CD/ Video CD/ Super Vid­eo CD/ MP3/ WMA/ JPEG/MPEG-4 format)
DVD-R/DVD-RW (recorded in video format)

(adjustable with the voltage selector), 50 Hz / 60 Hz

Design and specifications are subject to change without notice.

1-2 (No.MB282)

SECTION 1

PRECAUTION

1.1 Safety Precautions

(1) This design of this product contains special hardware and

many circuits and components specially for safety purpos­es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per­formed by qualified personnel only.

(2) Alterations of the design or circuitry of the product should

not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteris­tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us­ing replacement components rated for higher voltage, watt­age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser­vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac­teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.

(4) The leads in the products are routed and dressed with ties,

clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem­bling.

(5) Leakage shock hazard testing

After reassembling the product, always perform an isola­tion check on the exposed metal parts of the product (an­tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.

• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular­ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur­rent must not exceed 0.5mA AC (r.m.s.).

• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an

AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-

posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC

voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

0.15 F AC TYPE

Place this
probe on

1500 10W

Good earth ground

1.2 Warning

(1) This equipment has been designed and manufactured to

meet international safety standards.

(2) It is the legal responsibility of the repairer to ensure that

these safety standards are maintained.

(3) Repairs must be made in accordance with the relevant

safety standards.

(4) It is essential that safety critical components are replaced

by approved parts.

(5) If mains voltage selector is provided, check setting for local

voltage.

1.3 Caution

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.

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)

each exposed
metal part.

(No.MB282)1-3

1.5 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.

1.5.1 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 palate

(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.

1.6 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.7 Attention when traverse unit is decomposed

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

• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (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 sections after connecting the flexible wire.

Short land section

Connector

Pickup

1-4 (No.MB282)

Card wire

Traverse mechanism assembly

1.8 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

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

CLASS 1
LASER PRODUCT

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

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

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

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)

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

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

(No.MB282)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB282)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the metal cover
(See Figs.1 to 3)

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

screws A attaching the metal cover. (See Figs.1 and 2.)

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

screws B attaching the metal cover. (See Fig.3.)

(3) Remove the metal cover from the main body while lifting

the rear section of the metal cover in the direction of the ar­row. (See Figs.1 and 2.)

Metal cover

Metal cover

B

A

Fig.1

Metal cover

B

B

Fig.3

Fig.2

A

(No.MB282)1-7

3.1.2 Removing the front panel assembly
(See Figs.4 to 7)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the right side of the main body, remove the screw C

attaching the earth wires on the reverse side of the main
board. (See Fig.4.)

Reference:

After attaching the earth wires, fix them with a spacer as
before. (See Fig.4.)

(2) Remove the plastic rivet attaching the main board. (See

Fig.4.)

(3) From the inside of the main body, disconnect the card wires

from the connectors (CN303
ward side of the main board. (See Fig.4.)

(4) Remove the wire clamp fixing the wires and disconnect the

wires from the connectors (CN301
side of the main board. (See Fig.5.)

Reference:

After connecting the wires to the connectors, fix the wires
with the wire clamp as before. (See Fig.5.)

(5) Disconnect the wire from the connector CN454

ward side of the main board. (See Fig.5.) [UW version

only]

(6) From the left side of the main body, disconnect the parallel

wire from the connector CN101
(See Fig.5.)

(7) Disconnect the wire from the connector CN119 on the

transformer board. (See Fig.5.)

Reference:

After connecting the wire, pass the wire through the slot
a of the holder board as before. (See Fig.5.)

(8) Remove the tie band fixing the wire and disconnect the

wire from the connector CN106
board. (See Fig.5.)

Reference:

• After connecting the wire, fix the wire with a new tie
band as before. (See Fig.5.)

• After connecting the wire, pass the wire through the
slot a of the holder board as before. (See Fig.5.)

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

D attach the front panel assembly to the main body. (See
Fig.6.)

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

screws E and two screws F attaching the front panel as­sembly. (See Fig.7.)

(11) Release the claws b, remove the front panel assembly

from the main body in the direction of the arrow. (See
Fig.7.)

, CN860, CN880) on the for-

, CN302) on the forward

on the for-

on the transformer board.

on the speaker terminal

Plastic rivet

CN860

CN303

Speaker terminal board

CN454

Tie band

Transformer board

CN880

Spacer

Earth wires

CN106

Wire

CN119

wires

Main board

C

Fig.4

Holder board

Parallel wire

a

Wire

Parallel
wire

CN101

CN301

CN302

Main board

Wire clamp

Fig.5

1-8 (No.MB282)

Front panel assembly

Fig.6

Front panel assembly

D

D

b

Fig.7

E

F

b

E

(No.MB282)1-9

3.1.3 Removing the tuner
(See Figs.8 and 9.)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the top side of the main body, disconnect the card

wire from the connector CN21
Fig.8.)

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

screws G attaching the tuner to the rear panel. (See Fig.9.)

3.1.4 Removing the video board
(See Figs.8 and 9.)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the top side of the main body, disconnect the card

wire from the connector CN410
Fig.8.)

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

screws H attaching the video board to the rear panel. (See
Fig.9.)

on the main board. (See

on the main board. (See

Tuner

CN410 CN21 Main board

Video boardCard wires

Fig.8

H

G

Rear panel

Fig.9

1-10 (No.MB282)

3.1.5 Removing the rear panel

(See Figs.8 to 11)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the back side of the main body, remove the screw J

attaching the rear cover. (See Fig.10.)

(2) Release the sections c and remove the rear cover from the

rear panel. (See Fig.10.)

(3) Remove the two screws K and eighteen screws L attaching

the rear panel. (See Fig.11.)

(4) Remove the screw L’ attaching the rear panel.(See

Fig.11.) [US/UX/UN version only]

Reference:

Remove the tuner and video board as required. (See
Figs.8 and 9.)

(5) From the both sides of the main body, release the sections

d of the center chassis in the direction of the arrow and re­lease the joints e attaching the rear panel to the bottom
chassis. (See Fig. 11.)

J

c

Rear panelRear cover

Fig.10

Rear panel

L

L'

L

e e

L

Fig.11

Bottom chassis

d

L

K

(No.MB282)1-11

3.1.6 Removing the DVD mechanism assembly

r

(See Figs.12 and 13)

• Prior to performing the following procedures, remove the metal

cover, tuner and video board.
(1) From the top side of the main body, remove the three

screws M attaching the DVD mechanism assembly on the
center chassis. (See Fig.12.)

(2) From the forward side of the main board, disconnect the

card wires from the connectors (CN11

, CN531). (See Fig.12.)

CN524

Reference:

When reassembling, pass the card wire through the sec­tion f of the main board before connecting the card wire
to the connector CN11

(3) Remove the spacer fixing the card wires. (See Fig.12.)

Reference:

After connecting the card wires, fix them with the spacer
as before. (See Fig.12.)

(4) From the inside of the main body, take out the DVD mech-

anism assembly.

(5) Remove the tray fitting from the DVD mechanism assembly

in the direction of the arrow. (See Fig.13.)

. (See Fig.12.)

, CN522, CN523,

DVD mechanism assembly

M

Main board

Card wires

CN524

f

Center chassis

M

Space

Card
wires

CN531

CN522CN11

CN523

Card wire

Fig.12

DVD mechanism assembly

Tray fitting

Fig.13

1-12 (No.MB282)

3.1.7 Removing the main board

(See Figs.14 and 15)

• Prior to performing the following procedures, remove the metal

cover, tuner, video board and rear panel.
(1) From the right side of the main body, remove the screw N

attaching the earth wires on the reverse side of the main
board. (See Fig.14.)

Reference:

After attaching the earth wires, fix them with a spacer as
before. (See Fig.14.)

(2) Remove the plastic rivet attaching the main board. (See

Fig.14.)

(3) From the inside of the main body, disconnect the card wires

from the connectors (CN11

CN524, CN860, CN880) on the forward side of the main

board. (See Figs.14 and 15.)

Reference:

When reassembling, pass the card wire through the sec­tion f of the main board before connecting the card wire
to the connector CN11

(4) Disconnect the wire from the connector CN454

ward side of the main board. (See Figs.14 and 15.) [UW

version only]

(5) Remove the wire clamp fixing the wires and disconnect the

wires from the connector (CN301
side of the main board. (See Fig.15.)

Reference:

After connecting the wires to the connectors, fix the wires
with the wire clamp as before. (See Fig.15.)

(6) Disconnect the parallel wire from the connectors (CN217

CN218, CN219) on the main board. (See Fig.15.)

(7) Release the lock g of the connector CN216 on the main

board in the direction of the arrow 1 and disconnect the
main board from the connector CN206
minal board toward this side. (See Fig.14.)

Note:

When releasing the lock g of the connector CN216
care not to break the lock. (See Fig.14.)

(8) Release the lock h of the connector CN201 on the primary

board in the direction of the arrow 2 and disconnect the
connector CN211

in the direction of the arrow 3. (See Fig.14.)

CN201

Note:

When releasing the lock h of the connector CN201
not to break the lock. (See Fig.14.)

on the main board from the connector

, CN303, CN522, CN523,

. (See Figs.14 and 15.)

on the for-

, CN302) on the forward

on the speaker ter-

, take

, take care

Main board

CN880

f

CN860

Plastic
rivet

CN303

Spacer

Earth wires

Main board

,

CN522

CN531

CN454

Card
wires

CN201 Primary board

CN524

CN523

CN11

CN211

N

3

Fig.14

Card wire

Wire

CN880

CN11 CN522

CN206 CN216

g

h

2

1

Speaker terminal
board

f

CN531

CN454

CN524

CN523

CN216

Main
board

CN860

CN303

CN219

CN217

CN218

Main boardParallel wires

Wires

CN301

CN302

Main board

Wire clamp

Fig.15

(No.MB282)1-13

3.1.8 Removing the center chassis assembly
(See Fig.16)

• Prior to performing the following procedures, remove the metal

cover, tuner, video board and rear panel.
(1) From the top side of the main body, disconnect the card

wires from the connectors (CN11
on the main board.

Reference:

When reassembly, pass the card wire through the sec­tion f of the main board before connecting the card wire
to the connector CN11

(2) Disconnect the wire from the connector CN105 on the

speaker terminal board.

(3) Remove the two screws P attaching the center chassis as-

sembly.

(4) Take out the center chassis assembly from the main body.

.

, CN522, CN523, CN524)

CN522

CN531

Card
wires

CN523

CN524

CN11

Main board

f

Card wires

P

3.1.9 Removing the fan
(See Fig.17)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel and center chassis as­sembly.
From the bottom side of the center chassis assembly, remove
the two screws Q attaching the fan.

CN105

Speaker terminal board

Fan

Q

Wire

Center chassis assembly

Fig.16

Center chassis assembly

Fig.17

1-14 (No.MB282)

3.1.10 Removing the transformer board

(See Fig.18)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel and center chassis as­sembly.
(1) From the top side of the main body, disconnect the wire

and power cord from the connectors (CN119
the transformer board.

(2) Disconnect the parallel wire from the connector CN101

the transformer board.

(3) Remove the four screws R attaching the transformer board

and take out the transformer board from the main body.

, CN250) on

on

R

3.1.11 Removing the speaker terminal board

(See Fig.19.)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel, main board and center
chassis assembly.
(1) From the top side of the main body, remove the tie band fix-

ing the parallel wire.

Reference:

After connecting the parallel wire, fix it with the new tie
band.

(2) Disconnect the parallel wire from the connector CN106

the speaker terminal board.

(3) Release the locks (i, j) of the connectors (CN205

and disconnect the speaker terminal board in an upward di­rection.

on

, CN214)

Power
cord

CN250

Speaker terminal board

CN205

R

CN119

Transformer board

Fig.18

i

j

R

CN101

Parallel Wire

CN214

Primary board

CN106 Tie band

Speaker terminal board

Fig.19

Parallel wire

(No.MB282)1-15

3.1.12 Removing the regulator & surround amplifier board and main & subwoofer amplifier board
(See Figs.20 and 21)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel, main board, center chas­sis assembly and speaker terminal board.
(1) From the top side of the main body, disconnect the regula-

tor & surround amplifier and main & subwoofer amplifier
boards in an upward direction while releasing the locks (k,
m) of the connectors (CN202
board. (See Fig.20.)

(2) Take out the regulator & surround amplifier and main &

subwoofer amplifier boards at the same time from the main
body.

(3) Remove the two screws S attaching the leaf spring to the

heat sink.

(4) Remove the two screws T attaching the regulator & sur-

round amplifier board and remove the regulator & surround
amplifier board from the heat sink. (See Fig.21.)

(5) Remove the four screws U attaching the main & subwoofer

amplifier board to the heat sink. (See Fig.21.)

, CN203) on the primary

Main & subwoofer
amplifier board

CN202

k

Primary board

m

Primary board

Regulator & surround amplifier board

Main & subwoofer amplifier board

Regulator & surround
amplifier board

CN203

Fig.20

T

1-16 (No.MB282)

S

Leaf spring

U

Heat sink

Fig.21

3.1.13 Removing the primary board

r

(See Fig.22)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel, main board, center chas­sis assembly, speaker terminal board and regulator & sur­round amplifier board and main & subwoofer amplifier board.
(1) From the top side of the main body, disconnect the wire

from the connector CN119

Reference:

Pass the wire through the slot n of the holder board be­fore connecting the wire to the connector CN119

(2) Remove the screw V attaching the primary board on the

bottom chassis.

(3) Remove the section p of the primary board and take out the

primary board from the main body.

on the transformer board.

.

Primary board Bottom chassis

p

V

Holde
board

n

Transformer board

Fig.22

CN119 Wire

(No.MB282)1-17

3.1.14 Removing the FL board
(See Figs.23 and 24)

• Prior to performing the following procedures, remove the metal

cover and front panel assembly.
(1) From the front side of the front panel assembly, pull the vol-

ume knob out of the front panel assembly. (See Fig.23.)

(2) From the inside of the front panel assembly, remove the six

screws W attaching the FL board. (See Fig.24.)

(3) Release the claws q in the direction of the arrow and take

out the FL board from the front panel assembly. (See
Fig.24.)

3.1.15 Removing the switch board
(See Figs.23 to 25)

• Prior to performing the following procedures, remove the metal

cover and front panel assembly.
(1) From the front side of the front panel assembly, pull the mi-

crophone knob out of the front panel assembly. (See
Fig.23.) [US/UX/UN version only]

(2) From the inside of the front panel assembly, remove the

three screws X and screw X’ attaching the stay bracket.
(See Fig.24.)

Reference:

When attaching the screw X’, attach the earth wire with
it.

(3) Remove the ten screws Y and screw Y’ attaching the

switch board. (See Fig.25.)

Reference:

When attaching the screw Y’, attach the wire holder with
it.

(4) Take out the switch board from the front panel assembly.

Front panel assembly

Volume knob

Microphone knob

Fig.23

WW

FL board

W

X'

Earth
wire

X

q

W

X

Stay bracketFront panel assembly

Fig.24

1-18 (No.MB282)

3.1.16 Removing the cassette mechanism assembly

Y

(See Fig.25)

• Prior to performing the following procedures, remove the metal

cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the

five screws Z, screw Z’ attaching the cassette mechanism
assembly.

(2) Take out the cassette mechanism assembly from the front

panel assembly.

Reference:

• When attaching the screw Y’, attach the earth wire with it.

• When attaching the screws Z, attach the swing cam (L)/(R)
with them.

Y

Switch board

Front panel assembly

Y'

Wire
holder

Earth
wire

Swing cam (R)
assembly

Z'

Cassette mechanism
assembly

Swing cam (L)
assembly

Fig.25

Z

Z

(No.MB282)1-19

3.2 DVD mechanism section

• Prior to performing the following procedures, remove the DVD mechanism assembly from the main body.
(See “3.1.6 Removing the DVD mechanism assembly”.)

3.2.1 Removing the tray assembly

(See Figs.1 to 3)

(1) From the right side of the DVD mechanism assembly, push

the slide cam and pull the tray assembly out of the DVD
mechanism assembly in the direction of the arrow. (See
Fig.1.)

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

move the two screws A attaching the leaf spring to the
bushing and remove the leaf spring. (See Fig.2.)

(3) Remove the bushing of the tray assembly from the projec-

tion a on the DVD mechanism assembly and move the tray
assembly in the direction of the arrow. (See Fig.3.)

(4) Remove the claw b of the tray assembly from the DVD

mechanism assembly and take out the tray assembly. (See
Fig.3.)

Tray assembly

Slide cam

Leaf spring

DVD mechanism assembly

Fig.1

Bushing

A

DVD mechanism assembly

Fig.2

Projection a

Claw b

DVD mechanism assembly

Fig.3

Bushing

Tray assembly

1-20 (No.MB282)

3.2.2 Removing the traverse mechanism assembly
(See Figs.4)

From the bottom side of the DVD mechanism assembly, remove
the three screws B and screw B’ attaching the traverse mecha­nism assembly and take out the DVD traverse mechanism as­sembly with the DVD servo board.

Reference:

When attaching the screw B’, attach the washer with it.

B'

Washer

DVD mechanism assembly

B'

3.2.3 Removing the DVD servo board
(See Figs.5 and 6)

• Prior to performing the following procedures, remove the

traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder

the short land sections c on the pickup. (See Fig.5.)

(2) From the bottom side of the traverse mechanism assem-

bly, release the lock of the connector CN101
servo board in the direction of the arrow 1 and disconnect
the card wire. (See Fig.6.)

Caution:

• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector CN101
on the DVD servo board. If the card wire is disconnect­ed without attaching solder, the pickup may be de­stroyed by static electricity. (See Figs.5 and 6.)

• When attaching the DVD servo board, be sure to re­move solders from the short land sections c after con­necting the card wire to the connector CN101
DVD servo board. (See Figs.5 and 6.)

(3) Disconnect the card wire from the connector CN201

DVD servo board. (See Fig.6.)

(4) Remove the two screws C attaching the DVD servo board.

(See Fig.6.)

(5) Remove the DVD servo board from the engagement sec-

tion d in an upward and remove the engagement section f
in the direction 3 while removing the engagement section e
in the direction of the arrow 2. (See Fig.6.)

on the DVD

on the

on the

B

Traverse mechanism assembly

Fig.4

Short land section c

Traverse mechanism assembly

Fig.5

CN101

Card wire

d

C

1

2

DVD servo board

Pickup

Card wire

1

3

B

CN201

C

f

e

DVD servo board

Traverse mechanism assembly

Fig.6

(No.MB282)1-21

3.2.4 Removing the pickup
(See Figs.5, 7 to 9)

• Prior to performing the following procedures, remove the

traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder

the short land sections c on the pickup. (See Fig.5.)

(2) Release the lock of the connector on the pickup in the di-

rection of the arrow and disconnect the card wire. (See
Fig.7.)

Caution:

• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector on the
pickup. If the card wire is disconnected without attach­ing solder, the pickup may be destroyed by static elec­tricity. (See Figs.5 and 7.)

• When attaching the pickup, be sure to remove solders
from the short land sections c after connecting the
card wire to the connector on the pickup. (See Figs.5
and 7.)

(3) Remove the screw D attaching the plate and thrust spring.

(See Fig.7.)

(4) Remove the engagement section g attaching the plate to

the feed holder and remove the plate with the thrust spring.
(See Fig.7.)

(5) Remove the shaft of the pickup from the section h on the

traverse mechanism assembly and remove the shaft from
the section i while moving it in the direction of the arrow.
(See Fig.8.)

(6) Remove the pickup from the section j of the traverse mech-

anism assembly and take out the pickup with the shaft.
(See fig.8.)

(7) From the bottom side of the pickup, remove the two screws

E attaching the SW actuator and LEAD spring. (See Fig.9.)

(8) Pull the shaft out of the pickup. (See Fig.9.)

Plate

D

Feed holder

h

Shaft

g

Card wire

Thrust spring

Connector

Pickup

Fig.7

Traverse mechanism assembly

i

1-22 (No.MB282)

Pickup

Shaft

j

Fig.8

Pickup

SW actuator

LEAD spring

E

Fig.9

3.2.5 Attaching the pickup
(See Figs.5, 7 to 10)

• See “3.2.4 Removing the pickup”.

(1) Attach the shaft, SW actuator and LEAD spring to the pick-

up. (See Fig.9.)

(2) Align the pickup to the section j of the traverse mechanism

assembly first, and set the both ends of the shaft of the
pickup in the sections g and i of the traverse mechanism

assembly. (See Fig.8.)
(3) Attach the plate and thrust spring. (See Fig.7.)
(4) Remove solders from the short land sections c after con-

necting the card wire to the connector on the pickup. (See

Figs.5 and 7.)
(5) Turn the feed gear M in the direction of the arrow 1 to move

the pickup in the direction of the arrow 2. (See Fig.10.)

3.2.6 Removing the feed motor
(See Figs.7, 11 and 12)

• Prior to performing the following procedures, remove the

traverse mechanism assembly.
(1) From the top side of the traverse mechanism assembly, re-

move the screw D attaching the plate and thrust spring.
(See Fig.7.)

(2) Remove the engagement section g attaching the plate to

the feed holder and remove the plate with the thrust spring.
(See Fig.7.)

(3) Remove the wires from the soldered section k on the spin-

dle motor board. (See Fig.11.)

Reference:

When attaching the feed motor, pass the wire through
the section m on the spindle base. (See Fig.11.)

(4) Remove the feed holder, feed motor, lead screw, feed gear

E and feed gear M at the same time after removing the two
screws F attaching the feed holder. (See Fig.11.)

(5) From the side of the feed holder, remove the two screws G

attaching the feed motor. (See Fig.12.)

Feed gear M

1

Feed gear M

Feed gear E

F

F

Feed holder

2

Fig.10

Feed motor

Spindle base

Spindle motor board

Pickup

Lead screw

Wires

m

k

G

Fig.11

Feed holder

Fig.12

(No.MB282)1-23

3.2.7 Removing the spindle motor board
(See Figs.11 and 13)

• Prior to performing the following procedures, remove the

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

move the wires from the soldered section k on the spindle
motor board. (See Fig.11.)

(2) From the bottom side of the traverse mechanism assem-

bly, remove the three screws H attaching the spindle motor
board. (See Fig.13.)

3.2.8 Removing the switch board
(See Fig.14.)

(1) From the bottom side of the DVD mechanism assembly, re-

move the wires from the soldered section n on the switch
board.

(2) Lift the switch board while pressing the claw p of the DVD

mechanism assembly in the direction of the arrow and re­move it from the section q.

Reference:

• Put the wires on the section r after attaching the switch
board to the DVD mechanism assembly.

• Fix the claw p on the DVD mechanism assembly with bonds
after attaching the switch board.

H

Switch board

Soldered
section n

Traverse mechanism assembly

Fig.13

Wires

Claw p

3.2.9 Removing the motor
(See Figs.14 and 15)

• Prior to performing the following procedures, remove the tray

assembly.
(1) From the bottom side of the DVD mechanism assembly, re-

move the wires from the soldered section n on the switch
board. (See.Fig.14.)

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

move the belt from the motor pulley. (See Fig.15.)

Note:

Take care not to attach grease on the belt.

(3) Remove the two screws J attaching the motor to the DVD

mechanism assembly and take out the motor from the bot­tom side of the DVD mechanism assembly. (See Fig.15.)

Reference:

Put the wires on the section r after attaching the motor to the
DVD mechanism assembly. (See Fig.14.)

q

r

DVD mechanism assembly

J

DVD mechanism assembly

Fig.14

Belt

Motor pulley

Fig.15

1-24 (No.MB282)

3.3 Cassette mechanism assembly section

• Prior to performing the following procedures, remove the cassette mechanism assembly.

(See "3.1.16 Removing the cassette mechanism assembly".)

3.3.1 Removing the main motor and replacing the main belts

(See Figs.1 and 2)

(1) From the front side of the cassette mechanism assembly,

remove the two screws A attaching the main motor. (See
Fig.1.)

(2) From the back side of the cassette mechanism assembly,

remove the wires from the soldered sections a on the
switch board. (See Fig.2.)

Caution:

After reassembling, check the direction of the main mo­tor and polarity of the wires. (See Fig.2.)

(3) Remove the main motor and main belts. (See Fig.2.)

Note:

When attaching the main belts, take care not to attach grease
on the main belts.

Wire (Black)

Cassette mechanism assembly

Switch board

A

Fig.1

a

Wire (Red)

3.3.2 Replacing the F/R belts

(See Fig.3)

• Prior to performing the following procedures, remove the main

motor and main belts.

• Remove the wires of the main motor as required.

From the back side of the cassette mechanism assembly, re­move the F/R belts from the flywheel 1 and flywheel 2.

Switch board

Main belt

Cassette mechanism assembly

Main motor

Fig.2

Cassette mechanism assembly

Main belt

Flywheel 1

F/R belts

Fig.3

Flywheel 2

(No.MB282)1-25

3.3.3 Removing the clutch assemblies
(See Figs.4 to 7)

• Prior to performing the following procedures, remove the main

motor, main belts and F/R belts.

• Remove the wires of the main motor as required.

(1) From the front side of the cassette mechanism assembly,

remove the three slit washers attaching the flywheel 1, fly­wheel 2 and flywheel 3. (See Fig.4.)

(2) From the back side of the cassette mechanism assembly,

pull out the flywheel 1, flywheel 2 and flywheel 3. (See

Fig.5.)
(3) Remove the stoppers in an upward direction. (See Fig.5.)
(4) Remove the springs from the sections b. (See Fig.6.)
(5) Release the claws c in the direction of the arrow, remove

the plates and pulleys. (See Fig.6.)
(6) Release the claws d in the direction of the arrow, remove

the guide arms. (See Fig.7.)

Note:

When attaching the guide arms, attach the springs with

them as before. (See Fig.7.)
(7) Remove the cam gears in an upward direction. (See Fig.7.)
(8) Take out the clutch assemblies from the cassette mecha-

nism assembly. (See Fig.7.)

Cassette mechanism assembly

Slit washer

Slit washer

Fig.4

Cassette mechanism assembly

Slit washer

Flywheel 1

Stopper Stopper

Flywheel 3

Fig.5

Flywheel 2

Cassette mechanism assembly

b

Spring Spring

Pulley

c

Plates

Fig.6

b

Cassette mechanism assembly

d

d

Clutch assemblyClutch assembly

Pulley

c

1-26 (No.MB282)

Spring

Guide arm

Spring

Fig.7

Cam gearCam gear

Guide arm