JVC HX-GD8 Diagram

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB18820044

HX-GD8

Area suffix

J ----------------------------- U.S.A.
C -------------------------- Canada

CA-HXGD8 SP-HXGD8SP-HXGD8

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED

No.MB188

2004/4

SPECIFICATION

Amplifier section CA-HXGD8

Output Power SUBWOOFERS 195 W per channel, min. RMS, driven into 6 Ω at 63 Hz with no more than 10 % total harmonic

MAIN SPEAKERS 80 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no more than 10 % total harmonic

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

Digital output OPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm ± 30 nm)

VIDEO OUT Color system NTSC

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

COMPONENT
(interlace/ progressive)

Speaker
Terminals

Others AV COMPU LINK × 2 (Ø 3.5)

Tuner section FM tuning range 87.5 MHz - 108.0 MHz

AM tuning range 530 kHz - 1 710 kHz

Disc player section Playable disc DVD VIDEO/DVD AUDIO

Dynamic range 90 dB

Horizontal resolution 500 lines

Wow and flutter Immeasurable

Cassette deck section Frequency

response

General Power requirement AC 120 V , 60 Hz

Power consumption 265 W/ 325 VA (at operation)

Dimensions (approx.) (W/H/D) 205 mm × 370 mm × 432 mm

Mass (approx.) 11 kg (24.3 lbs)

Type 3-Way 4-Speaker Bass-Reflex Type
Speakers Subwoofer 20 cm (7 7/8 in.)cone × 1

Power handling capacity Subwoofer 195 W

Impedance Subwoofer 6 Ω

Frequency range Subwoofer 30 Hz - 970 Hz

Sound pressure level Subwoofer 83 dB/W·m

Dimensions (approx.) (W/H/D) 240 mm × 457 mm × 407 mm

Mass (approx.) 10 kg (22.1 lbs) each

MAIN SPEAKERS 6 Ω - 16 Ω ()
SUBWOOFERS 6 Ω - 16 Ω ()

Normal (type I) 50 Hz - 14 000 Hz

Wow and flutter 0.15 % (WRMS)

Woofer 13.5 cm (5 3/8in.) cone × 2
Tweeter 5 cm (2 in.) cone × 1

Main speaker 80 W

Main speaker 6 Ω

Main speaker 75 Hz 25 000 Hz

Main speaker 88 dB/W·m

Design and specifications are subject to change without notice.

distortion.

distortion.
AUX:300 mV/47 kΩ

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

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

30 W (on standby)

(8 1/8 in. × 14 5/8 in. × 17 1/16 in.)

Speaker section SP-HXGD8

(9 1/2 in. × 18 in. × 16 1/16 in.)

1-2 (No.MB188)

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.MB188)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 sections

1-4 (No.MB188)

DVD pickup

DVD changer mechanism assembly

1.8 Importance administering point on the safety

Primary board (Forward side)

F102

F101

8A-125V

8A-125V

1.6A-125V

3.15A-125V

F104

F103

F001

6.3A-125V

Caution: For continued protection against risk of
fire, replace only with same type 6.3 A/125 V for
F001, 8 A/125 V for F101 and F102, 3.15 A/125 V
for F103, 1.6 A/125 V for F104.
This symbol specifies type of fast operating fuse.

Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F001 comme le meme type
que 6,3 A/125 V, 8 A/125 V pour F101 et F102, et
3,15 A/125 V pour F103, et 1,6 A/125V pour F104.
Ce sont des fusibles suretes qui functionnes rapide.

^

(No.MB188)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe ADJUSTMENT.

1-6 (No.MB188)

SECTION 3

r

DISASSEMBLY

3.1 Main body section

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

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

screws A attaching the metal cover. (See Fig.1.)

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

screws B attaching the metal cover. (See Figs.2 and 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.2 and 3.)

Metal cover

A

Metal cover

A

A

Fig.1

B

Fig.2

Metal cove

B

Fig.3

(No.MB188)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, disconnect the card

wires from the connectors (CN43
on the main board. (See Fig.4.)

(2) Disconnect the earth wire from the chassis base. (See

Fig.4.)

(3) From the top side of the main body, disconnect the parallel

wires from the connectors (CN201
board. (See Fig.5.)

Reference:

When reassembling, pass the parallel wire through the
hole a on the plastic chassis before connecting the par­allel wire to the connector CN201
(See Fig.5.)

(4) From the left side of the main body, remove the tie band

bundling the wires. (See Fig.16.)

Reference:

After reassembling, bundle the wires with the new tie
band as before. (See Fig.16.)

(5) Disconnect the earth wire from the chassis base. (See

Fig.6.)

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

screws C attaching the front panel assembly. (See Figs.4
and 6.)

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

screws D attaching the front panel assembly. (See Fig.7.)

(8) Release the joints b of the front panel assembly from the

chassis base and remove the front panel assembly in the
direction of the arrow. (See Figs.4, 6 and 7.)

Front panel assembly

Card wires

, CN44, CN802, CN803)

, CN205) on the bridge

on the bridge board.

Main board

CN802

Bridge board

CN201

Parallel wire

Parallel wire

CN205

Parallel wire

a

Plastic chassis

Fig.5

Front panel assembly

C

C

Earth wire

1-8 (No.MB188)

b

Card wires

Fig.4

CN43

CN44

CN803

Chassis base

Tie band

Chassis base

Front panel assembly

D

Fig.6

Fig.7

Earth wire

b

Chassis base

b

b

3.1.3 Removing the tuner

(See Figs.8 and 9)

• Prior to performing the following procedures, remove the metal

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

wire from the connector CN560
Fig.8.)

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

screws E 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 right side of the main body, disconnect the card

wire from the connector CN502
Fig.8.)

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

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

on the main board. (See

on the main board. (See

Video board

CN502

Tuner

Fig.8

F

Card wires

CN560

Main board

Rear panel

E E

Fig.9

(No.MB188)1-9

3.1.5 Removing the rear panel

r

(See Figs.10 to 12)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the top side of the main body, remove the tie band

bundling the wires. (See Fig.10.)

Reference:

After reassembling, bundle the wires with the new tie
band as before. (See Fig.10.)

(2) Disconnect the wire from the connector CN202

bridge board. (See Fig.10.)

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

screws G and screw H attaching the rear cover. (See
Fig.11.)

(4) Release the sections c and remove the rear cover. (See

Fig.11.)

(5) Remove the sixteen screws J attaching the rear panel.

(See Fig.12.)

(6) From the both sides of the main body, release the joints d

attaching the rear panel to the chassis base and remove
the rear panel with the fan. (See Fig.12.)

on the

Tie band

Bridge board

CN202

Wires

3.1.6 Removing the fan
(See Figs.10 to 12)

• Prior to performing the following procedures, remove the metal

cover.
(1) From the top side of the main body, remove the tie band

bundling the wires. (See Fig.10.)

Reference:

After reassembling, bundle the wires with the new tie
band as before. (See Fig.10.)

(2) Disconnect the wire from the connector CN202

bridge board. (See Fig.10.)

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

screws G and screw H attaching the rear cover. (See

Fig.11.)
(4) Remove the two screws K attaching the fan. (See Fig.12.)
(5) Take out the fan from the main body.

on the

H

c

Rear panel

J

Fig.10

G

c

c

Fig.11

Rear cove

J

Fan

1-10 (No.MB188)

KK

J

J

dd

J

Fig.12

3.1.7 Removing the main board
(See Figs.13 and 14)

• 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, disconnect the card

wires from the connectors (CN43

, CN803) on the main board. (See Fig.13.)

CN802

(2) Disconnect the parallel wires from the connector CN715 on

the forward side of the main board. (See Fig.13.)

(3) Remove the two screws L attaching the main board. (See

Fig.14.)

(4) Disconnect the connector CN217

ward this side and disconnect the connector CN501
main board in the direction of the arrow. (See Fig.14.)

Reference:

• When attaching the main board, insert the sections e of the
bridge board in the hole of the main board. (See Fig.14.)

• Insert the section f of the main board in the hole of the chas­sis base before attaching the screws L.

, CN44, CN110, CN111,

on the main board to-

on the

Card wires

CN802

CN110

Main board

CN803

CN715

CN111

Card wires

Bridge board

L

CN44

Fig.13

e

f

Fig.14

CN43

Main board

L

CN217

e

CN501

Main board

Chassis base

(No.MB188)1-11

3.1.8 Removing the main amplifier board/subwoofer amplifier boards
(See Figs.15 to 17)

• Prior to performing the following procedures, remove the metal

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

from the connector (CN206
(See Fig.15.)

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

bundling the wires. (See Fig.16.)

Reference:

After reassembling, bundle the wires with the new tie
band as before. (See Fig.16.)

(3) Disconnect the connectors (CN600

amplifier/subwoofer amplifier boards from the connection
board in the direction of the arrow. (See Fig.16.)

(4) Remove the two screws M and screw N attaching the main

amplifier board. (See Fig.17.)

(5) Removing the two screws P and screw Q attaching the

subwoofer amplifier board. (See Fig.17.)

, CN208) on the bridge board.

, CN700) on the main

Wires

Main amplifier board

Tie band

Bridge board

CN206CN208

Fig.15

Subwoofer amplifier board

Wires

Heat sink

CN600 CN700

Connection board

Fig.16

P

Q

Subwoofer amplifier board

Fig.17

M

N

Main amplifier board

1-12 (No.MB188)

3.1.9 Removing the connection board

r

(See Fig.18.)

• Prior to performing the following procedure, remove the metal

cover, tuner, video board, rear panel, main board and main
amplifier/subwoofer amplifier boards.
(1) From the top side of the main body, remove the two screws

R attaching the connection board on the chassis base.

Reference:

When reassembling, attach the connection board to the sec­tion g and align the projection h of the chassis base to the hole
of the connection board.

R

Connection board

g

h

3.1.10 Removing the bridge board

(See Figs.19 and 20)

• Prior to performing the following procedures, remove the metal

cover, tuner, video board, rear panel and main board.
(1) From the top side of the main body, release the wire holder

bundling the wire. (See Fig.19.)

(2) Disconnect the wires from the connectors (CN206

) on the bridge board. (See Fig.19.)

CN214

Reference:

After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)

(3) Disconnect the parallel wires from the connectors (CN201

CN205, CN213) on the bridge board. (See Fig.19.)

(4) Release the wire holder holding the card wire. (See

Fig.19.)

(5) Remove the spacer fixing the wire on the bridge board.

(See Fig.19.)

(6) Remove the two screws S attaching the bridge board on

the 5DVD changer mechanism assembly. (See Fig.20.)

(7) Bend the claw i in the direction of the arrow and remove the

bridge board in an upward direction. (See Fig.20.)

Reference:

• When attaching the bridge board, align the projections (j, k)
in the hole of the bridge board. (See Fig.20.)

• When reassembling, pass the wires through the sections
(m, n) of the plastic chassis. (See Fig.19.)

, CN208,

, fix the

Chassis base

Bridge board

Wire

Wires

CN208

,

CN206

j

Spacer

CN213CN201

k

R

Fig.18

Wire holder

Card wire

m

Fig.19

Bridge board

S

Parallel wire

CN205

CN214

n

Wire holder

S

i

Fig.20

5DVD change
mechanism
assembly

(No.MB188)1-13

3.1.11 Removing the 5DVD changer mechanism assembly
(See Figs.21 to 23)

• Prior to performing the following procedures, remove the metal

cover, tuner, video board, rear panel, main board and bridge
board.
(1) From the both sides of the main body, remove the two

screws T attaching the 5DVD changer mechanism assem­bly to the front panel assembly. (See Figs.21 and 22.)

(2) From the left side of the main body, remove the tie band

bundling the wire and parallel wires. (See Fig.22.)

Reference:

After reassembling, bundle the wire and parallel wires
with the new tie band as before. (See Fig.22.)

(3) Take out the 5DVD changer mechanism assembly from the

main body.

Reference:

When attaching the 5CD changer mechanism assembly,
pass the wires through the sections (m, n) of the plastic
chassis. (See Fig.22.)

(4) From the both and top sides of the 5DVD changer mecha-

nism assembly, remove the two screws U and screw U' at­taching the main chassis. (See Fig.23.)

Reference:

• Align the projections s of the plastic chassis to the
holes of the main chassis before attaching the screw
U'. (See Fig.23.)

• When attaching the screw U', attach the earth wire
with it. (See Fig.23.)

(5) Take out the main chassis.
(6) From the top side of the 5DVD changer mechanism as-

sembly, remove the three screws V and screw V' attaching
the 5DVD changer mechanism assembly on the plastic
chassis.

Reference:

• When reassembling, align the projections (p, q, r) of the
plastic chassis to the holes of the 5DVD changer mechanism
assembly before attaching the screws V and V'. (See
Fig.23.)

• When attaching the screw V', attach the earth wire with it.
(See Fig.23.)

Front panel assembly

5DVD changer mechanism assembly

T

5DVD changer
mechanism assembly

m

Fig.21

Front panel assembly

Tie band

Wires

T

n

Fig.22

1-14 (No.MB188)

5DVD changer
mechanism assembly

V

Main chassis

V

r

V

U

U

Fig.23

p

V

Plastic chassis

s

U'

s

Earth wire

V'

q

3.1.12 Removing the primary board

Y

(See Figs.19, 21, 22, 24 and 25)

• Prior to performing the following procedures, remove the metal
cover, tuner, video board, rear panel and main board.
(1) From the top side of the main body, release the wire holder

bundling the wire. (See Fig.19.)

(2) Disconnect the wires from the connectors (CN206

CN214) on the bridge board. (See Fig.19.)

Reference:

After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)

(3) Disconnect the parallel wires from the connectors (CN201

, CN213) on the bridge board. (See Fig.19.)

CN205

(4) Release the wire holder holding the card wire. (See

Fig.19.)

(5) Remove the spacer fixing the wire on the bridge board.

(See Fig.19.)

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

screws T attaching the 5DVD changer mechanism assem­bly to the front panel assembly. (See Figs.21 and 22.)

Reference:

It is not necessary to remove the bridge board from the
5DVD changer mechanism assembly.

(7) Take out the 5DVD changer mechanism assembly with the

bridge board from the main body.

Reference:

When attaching the 5DVD changer mechanism assem­bly, pass the wires through the sections (m, n) of the
5DVD changer mechanism assembly. (See Fig.22.)

(8) From the top and left sides of the main body, remove the

four screws W and screw X attaching the primary board on
the chassis base. (See Figs.24 and 25.)

(9) From the forward side of the primary board, disconnect the

power cord from the connector CN200

. (See Fig.25.)

, CN208,

, fix the

Primary board

,

W

Chassis base

Fig.24

Primary board

CN200

Chassis basePower cord

W

X

Fig.25

3.1.13 Removing the FL board

(See Fig.26)

• 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

soldered sections (t, u) on the FL board to remove the par­allel wires.

(2) Disconnect the card wire from the connector CN902

FL board.

(3) Remove the four screws Y attaching the FL board.

Reference:

When attaching the FL board, align the projections v of the
front panel assembly in the holes of the FL board before at­taching the screws Y.

on the

Front panel assembly

v

Y

Y

t

Card wire

Parallel wire

CN902

Fig.26

FL board

Y

Parallel wire

v

u

(No.MB188)1-15

3.1.14 Removing the switch board
(See Fig.27)

• 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

three screws Z attaching the switch board.

(2) Take out the switch board and remove the soldered section

w on the switch board to remove the parallel wire.

Reference:

When attaching the switch board, align the projections x in the
holes of the switch board before attaching the screws Z.

3.1.15 Removing the standby LED board
(See Fig.27)

• 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

two screws AA attaching the standby LED board.

(2) Take out the standby LED board and remove the soldered

section y on the standby LED board to remove the parallel
wire.

Reference:

When attaching the standby LED board, align the projections
z in the holes of the standby LED board before attaching the
screws AA.

Z

x

Z

x

Z

w

Parallel wires

Switch board

Front panel assembly

x

Fig.27

z

Standby LED board

AA

z

AA

y

1-16 (No.MB188)

3.1.16 Removing the encoder board

(See Figs.26 to 29)

• Prior to performing the following procedures, remove the metal

cover and front panel assembly.
(1) From the outside of the front panel assembly, pull out the

knobs toward this side. (See Fig.28.)

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

card wire from the connector CN902
Fig.26.)

(3) Remove the four screws Y, three screws Z and two screws

AA attaching the each board. (See Figs.26 and 27.)

(4) Take out the FL board with the switch and standby LED

boards.

Reference:

It is not necessary to remove the parallel wires.

(5) Remove the eight screws AB attaching the encoder board.

(See Fig.29.)

Reference:

When attaching the encoder board, align the projections aa of
the front panel assembly in the holes of the encoder board be­fore attaching the screws AB. (See Fig.29.)

on the FL board. (See

Volume knob

Sound mode knob

Preset knob

Front panel assembly

Fig.28

Encoder boardFront panel assembly

AB

AB

aa

aa

AB

AB

Fig.29

(No.MB188)1-17

3.1.17 Removing the microphone board

r

(See Fig.30)

• Prior to performing the following procedure, remove the metal

cover and front panel assembly.
From the inside of the front panel assembly, remove the seven
screws AC and screw AC' attaching the microphone board.

Reference:

• When attaching the microphone board, align the projections
ab of the front panel assembly in the holes of the micro­phone board before attaching the screws AC and AC'.

• When attaching the screw AC', attach the wire holder with it.

Microphone board

AC AC AC

ab

ab

Wire holde

AC'AC

Wire

3.1.18 Removing the headphone board
(See Fig.31)

• 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

screw AD attaching the headphone board.

(2) Remove the wire holder fixing the wire and take out the

headphone board.

Reference:

After attaching the headphone board, fix the wire with the wire
holder.

3.1.19 Removing the cassette mechanism assembly
(See Fig.31)

• Prior to performing the following procedure, remove the metal

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

two screws AE and two screws AF attaching the cassette
mechanism assembly.

Reference:

When attaching the cassette mechanism assembly, align the
projections (ac, ad) in the holes of the cassette mechanism as-
sembly.

ab

Front panel assembly

AE

ad

AE

Front panel assembly

Fig.30

Cassette mechanism assembly

Wire holder

ac

AF

Wire

AD

Headphone board

AF

Fig.31

1-18 (No.MB188)

3.2 DVD changer mechanism assembly section

r

r

r

3.2.1 Removing the tray assemblies

(See Figs.1 to 5)

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

A from the top cover and release the two joints a on the
both sides of the DVD changer mechanism assembly. (See
Figs.1 and 2.)

(2) Remove the two rods from the top cover and remove the

top cover from the lifter assembly. (See Figs.1 and 2.)

(3) Remove the open det. lever on the left side of the DVD

changer mechanism assembly. (See Fig.3.)

(4) From the right side of the DVD changer mechanism as-

sembly, draw out the tray assemblies toward the front while
pushing the part b of the side (R) assembly. (See Figs.4
and 5.)

Note:

The tray can be locked if all tray assemblies are at­tached.

(5) From the topside of the DVD changer mechanism assem-

bly, move the stopper tabs c in the direction of the arrow
and release them. Pull out the tray assemblies from the
DVD changer mechanism assembly. (See Fig. 5.)

Note:

Remove the tray assembly from top tray 5 in order.

Reference:

When reattaching the tray assembly, or when removing the
disc remaining inside, refer to another section"3.2.15 Taking
out the disc in the play mode".

Top cove

A

A

Tray assemblies

Tray assembly

Fig.3

b

Fig.4

Open det. leve

Side(R) assembly

a

Lifter assembly

a

Lifter assembly

Fig.1

Fig.2

a

c

Rods

Rods

Top cove

Fig.5

a

(No.MB188)1-19

3.2.2 Removing the DVD servo board
(See Figs.6 to 8)

Caution:

Solder the short land sections d on the DVD pickup before dis­connecting the card wire extending from the DVD pickup. If
you do not follow this instruction, the DVD pickup may be dam­aged.
(1) From the topside of the DVD changer mechanism assem-

bly, solder the short land sections d on the DVD pick up.
(See Fig.6.)

(2) From the bottom side of the DVD changer mechanism as-

sembly, disconnect the card wire from the connectors
(CN201

(3) Disconnect the wires from the connectors (CN452

on the DVD servo board. (See Fig.7.)

(4) Remove the screw B attaching the earth wire. (See Fig.7.)

Reference:

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

(See Fig.7.)

(6) From the reverse side of the DVD servo board, release the

lock of the connector CN101
and disconnect the card wire. (See Fig.8.)

Caution:

Unsolder the solders from the short land sections d after reas­sembling. (See Fig.6.)

, CN451) on the DVD servo board. (See Fig.7.)

, CN453)

After attaching the earth wire, fix it with the spacer as be­fore. (See Fig.7.)

in the direction of the arrow

Short land sections d

DVD changer mechanism assembly

Fig.6

DVD changer mechanism assembly

Card wire

CN452

CN453

DVD pickup

Wires

g

3.2.3 Removing the switch board
(See Fig.7)

• Prior to performing the following procedures, remove the DVD

servo board.
(1) From the bottom side of the DVD changer mechanism as-

sembly, remove the screw D attaching the switch board to
the DVD changer mechanism assembly.

(2) Loosen the screw E attaching the DVD traverse mecha-

nism assembly and take out the switch board while lifting
the section e of the DVD traverse mechanism assembly.

(3) Release the wires from the slots f of the switch board.

Reference:

When reassembling, pass the wire through the section g of the
DVD traverse mechanism assembly.

B

Earth wire

C

CN451

DVD servo board

DVD servo board

Switch board

f

e

CN201

C

DVD traverse mechanism assembly

Fig.7

Card wire

CN101

Lock

D

E

1-20 (No.MB188)

Card wire

Fig.8

3.2.4 Removing the motor board

(See Figs.9 and 10)

(1) From the top side of the DVD changer mechanism assem-

bly, remove the two belts from the motor pulleys. (See
Fig.9.)

Note:

Take care not to attach grease on the belt.

(2) Remove the four screws F attaching the motors to the load-

er assembly. (See Fig.9.)

(3) From the bottom side of the DVD changer mechanism as-

sembly, remove the two screws G. (See Fig.10.)

(4) Disconnect the connector CN2

tray switch board and remove the motor board. (See
Fig.10.)

(5) Disconnect the card wire from the connector CN1

motor board. (See Fig.10.)

Note:

When connecting the card wire, let the card wire through the
slots g of the motor board. (See Fig.10.)

Reference:

You need not to remove the tray assemblies, and in such case,
move it.

on the motor board from the

on the

Belt

F

Motor Motor

Motor pulleys

Belt

F

Loader assembly

Fig.9

Motors

3.2.5 Removing the motor

(See Fig. 10)

• Prior to performing the following procedures, remove the motor

board.
(1) From the reverse side of the motor board, unsolder the four

soldered sections h on the motor board.

(2) From the forward side of the motor board, remove the mo-

tors.

Note:

When reattaching the motor, turn the side where the label
should be put to the front side.

Label

Tray switch
board

CN2

CN1

DVD changer mechanism assembly

Motor board

G

g

Card wire

Soldered sections h

G

Motors

Fig.10

Motor board

(No.MB188)1-21

3.2.6 Removing the DVD traverse mechanism assembly
(See Fig.11)

• Prior to performing the following procedures, remove the tray

assemblies and DVD servo board.
(1) From the bottom side of the DVD changer mechanism as-

sembly, remove the three screws H attaching the DVD

traverse mechanism assembly.
(2) Remove the card wire from the section i.
(3) Remove the wire from the section j.
(4) Take out the DVD traverse mechanism assembly from the

DVD changer mechanism assembly.

DVD changer mechanism assembly

i

j

H

H

DVD traverse mechanism assembly

Fig.11

1-22 (No.MB188)

3.2.7 Removing the DVD pickup

r

(See Figs.12 to 14)

• Prior to performing the following procedures, remove the tray
assemblies, DVD servo board and DVD traverse mechanism
assembly.
(1) From top side of the DVD traverse mechanism assembly,

release the lock of the connector on the DVD pickup and
disconnect the card wire in the direction of the arrow. (See
Fig.12.)

(2) Turn the screw shaft gear in the direction of the arrow 1 to

move the DVD pickup in the direction of the arrow 2. (See
Fig.12.)

(3) Remove the screw J attaching the gear holder. (See

Fig.12.)

(4) Remove the screw K attaching the SS adj. spring. (See

Fig.12.)

(5) Move the DVD pickup in the direction of the arrow and re-

move the screw shaft from the section k on the screw shaft
holder. (See Fig.13.)

(6) Remove the section m of the DVD pickup from the guide

shaft. (See Fig.13.)

(7) Remove the two screws L attaching the rack arm to the

DVD pickup. (See Fig.14.)

(8) Pull the screw shaft from the DVD pickup in the direction of

the arrow. (See Fig.14.)

3.2.8 Attaching the DVD pickup

(See Figs.12 to 14)

(1) Attach the screw shaft to the DVD pickup and attach the

rack arm with the screws L. (See Fig.14.)

Reference:

After attaching the screw shaft to the DVD pickup, attach
the screw shaft collor to the screw shaft. (See Fig.14.)

(2) Attach the section m of the DVD pickup to the guide shaft

first and attach the screw shaft to the section k on the
screw shaft holder. (See Fig.13.)

(3) Attach the gear holder and SS adj. spring with the screws

J and K. (See Fig.12.)

(4) Turn the screw shaft gear to move the DVD pickup toward

the left. (See Fig.12.)

(5) Connect the card wire to the connector on the DVD pickup.

(See Fig.12.)

Screw shaft gear

1

Gear holder

Screw shaft

DVD traverse mechanism assembly

Connector

Card wire

2

KJ

DVD pickup

Fig.12

DVD pickup

m

Screw shaft holder

Fig.13

DVD pickup

SS adj. spring

Guide shaft

k

Rack arm

Screw shaft collo

L

Screw shaft

Fig.14

(No.MB188)1-23

3.2.9 Removing the spindle motor board
(See Figs.15 and 16)

• Prior to performing the following procedures, remove the tray

assemblies and DVD traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-

bly, remove the four screws M attaching the DVD traverse
mechanism assembly to the DVD traverse mechanism
base 3. (See Fig.15.)

(2) Remove the wires from the soldered section n on the spin-

dle motor board. (See Fig.15.)

(3) Remove the screw N attaching the spindle motor board.

(See Fig.15.)

(4) From the bottom side of the DVD traverse mechanism as-

sembly, remove the three screws P attaching the spindle
motor board. (See Fig.16.)

Reference:

When attaching the spindle motor board, let the card wire
through the hole p on the SF motor base. (See Fig.15.)

N

Card wire

SF motor base

M

Spindle motor board

M

p

n

M

Wires

M

DVD traverse mechanism base

DVD traverse mechanism assembly

Fig.15

P

Fig.16

1-24 (No.MB188)

3.2.10 Removing the motor

(See Figs.17 and 18)

• Prior to performing the following procedures, remove the tray

assemblies, DVD traverse mechanism assembly, DVD pickup
and spindle motor board.

• Remove the wires of the motor as required.

(1) Remove the middle gear in the direction of the arrow. (See

Fig.17.)

(2) Remove the screw Q and screw R attaching the SF motor

base. (See Fig.17.)

(3) Remove the screw S attaching the motor to the SF motor

base. (See Fig.18.)

(4) Take out the motor from the motor base.

Reference:

After attaching the feed motor, let the wires through the sec­tions q and r on the SF motor base. (See Fig.17.)

SF motor base

Q

Middle
gear

R

Motor

rq

Fig.17

Motor

SF motor base

S

Fig.18

(No.MB188)1-25

3.2.11 Removing the side (L) assembly and tray switch board
(See Figs.19 to 21)

• Prior to performing the following procedures, remove the tray

assemblies.
(1) From the topside of the DVD changer mechanism assem-

bly, remove the two screws T attaching the side (L). (See
Fig.19.)

(2) From the left side of the DVD changer mechanism assem-

bly, remove the spacer fixing the tray switch board and mo­tor board. (See Fig.20.)

(3) Disconnect the connector CN3

from the motor board and detach the side (L) in an upward
direction. (See Fig.20.)

(4) Remove the screw U attaching the tray switch board to the

side (L). (See Fig.21.)

(5) Release the joint tab s of the side (L) in the direction of the

arrow 1 and release the joint tab t while removing the tray
switch board in the direction of the arrow 2. (See Fig.21.)

on the tray switch board

SIde(L)

T

T

Fig.19

T

Side(L)

T

CN3

Tray switch board

Motor board

Side(L)

Fig.20

s

1

1-26 (No.MB188)

2

t

Tray switch board

U

Fig.21

3.2.12 Removing the side (R) assembly

(See Fig.22 to 26)

• Prior to performing the following procedures, remove the tray

assemblies and DVD servo board.
(1) From the inside of the side (R) assembly, release the two

tabs u of the gear cover and remove the gear cover out­ward. (See Figs.22 and 23.)

(2) From the right side of the DVD changer mechanism as-

sembly, remove the elevator spring attached to the hook v
of the loader assembly. (See Figs.23 and 24.)

(3) From the top side of the DVD changer mechanism assem-

bly, turn the gear 1 clockwise to move the elevator cam
rearward. (See Fig.24.)

(4) Move the two slots w and joint x of the elevator cam and

remove the elevator cam outward. (See Fig.24.)

(5) Remove the three screws V and detaches the side (R) as-

sembly upward. (See Figs.25 and 26.)

Note:

When reattaching the side (R) assembly, make sure to fit the
shaft (part y) into the slot of the select lever. (See Fig.25.)

Side(R) assembly

u

V

Elevator spring

ww

V

x

Fig.24

y

Select lever

v

Elevator cam

Side(R) assembly

Gear cover

Elevator cam

Loader assembly

Fig.22

Elevator

Fig.23

Gear 1

v

V

Side(R) assembly

Fig.25

V

V

Side(R) assembly

Fig.26

(No.MB188)1-27

3.2.13 Removing the lifter assembly
(See Figs.27 to 31)

• Prior to performing the following procedures, remove the tray

assemblies, DVD servo board, side (L) and side (R) assembly.
(1) From the top side of the DVD changer mechanism assem-

bly, turn the gear 1 clockwise to move the lifter assembly
upward. (See Figs.27 and 28.)

(2) Turn the gear 2 clockwise to move the hook toward the

front until it stops. (See Figs.27 and 28.)

(3) Move the hook stopper in the direction of the arrow 2 while

pushing the tab z of the hook stopper to unlock it in the di­rection of the arrow 1 and release four joints aa to detach

from the rack holder. (See Fig.29.)
(4) Release the rod from part ab. (See Fig.29.)
(5) Turn the gear 1 clockwise again to move the lifter assembly

upward. (See Fig.30.)
(6) Remove the lifter assembly from the DVD changer mecha-

nism assembly upward at the positions ac where the four

pins on the both sides of the lifter assembly fit to the notch-

es of the loader assembly. (See Fig.30.)
(7) Move the lifter assembly in the direction of the arrow and

release it from the hook. (See Fig.31.)

Gear 2

Hook stopper

aa

Rack holder

aa

z

aa

Lifter assembly

Gear 1

1

Hook stopper

Fig.29

Hook

aa

2

Rod(L)

ac

ab

ac

Hook

Gear 2

Lifter assembly

Fig.27

Gear 1

Gear 1

Lifter assembly

Loader assembly

Lifter assembly

Fig.30

ac

ac

Hook stopper

1-28 (No.MB188)

Hook

Fig.31

Hook

Fig.28

3.2.14 Removing the rack holder and sensor assembly

r

r

(See Figs.32 to 38)

• Prior to performing the following procedures, remove the tray
assemblies, side (L), side (R) assembly and lifter assembly.

Reference:

If the slide gear of the DVD changer mechanism assembly
places at joint ad of the rack holder, turn the gear 1 counter­clockwise to move the slide gear in the direction of the arrow.
Then Remove the rack holder. (See Figs.32 and 33.)
(1) Remove the three screws W attaching the rack holder and

release joint ad from the notch ae. (See Figs.32 and 34.)

Note:

When reattaching the rack holder, do not nip the wires
extending from the sensor assembly. (See Fig.32.)

(2) Remove the two screws X attaching the sensor assembly.

(See Figs.35 and 38.)

(3) Move the sensor assembly in the direction of the arrow to

release from the joint section af. (See Figs.35 and 38.)

(4) Remove the sensor spring attached to the bottom of the

sensor assembly from the boss ag on the slider. (See
Figs.35 and 36.)

(5) Remove the screw Y and Z attaching the sensor board and

SV. resister respectively. (See Fig.37.)

Reference:

Remove the soldered section aj on the sensor board as re­quired. (See Fig.37.)

Note:

• When reattaching the SV. resister, attach the slider to the

sensor bracket and fit the lever on the bottom of the SV. re­sister into slot ak of the sensor slider. (See Figs.36 and 37.)

• When reattaching the rack holder, turn the gear 1 clockwise

to move the slide gear and slide lever inside the body in the
direction of the arrow. (See Figs.32 and 38.)

• Let the wire extending from the sensor assembly through

notch ah to the bottom of the DVD changer mechanism as­sembly. (See Figs.35 and 38.)

• Fit pin am of the slide lever into hole ai of the slider on the

bottom of the sensor assembly while attaching the sensor
spring to the boss ag of the slider. (See Figs.36 and 38.)

• Joint section af of the sensor assembly to the notch an of the

DVD changer mechanism assembly. (See Fig.38.)

W

Rack holder

Slide gear

X

Rack holde

ad

Fig.33

Rack holde

ae

ad

Fig.34

ah

Sensor assembly

Slider

W

Wire

Slide gear

ad

W

Fig.32

Gear 1

ag

X

af

Sensor spring

Fig.35

(No.MB188)1-29

Slider

ak

ag

Sensor spring

Fig.36

ai

YZ

Sensor board

ak

SV. resister

Slider

aj

Sensor bracket

Fig.37

X

Sensor assembly

X

Sensor gear

an

1-30 (No.MB188)

af

am

Sensor spring

ai

ag

ah

Slide lever

Fig.38