JVC HX GX7 Diagram

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB16120043

HX-GX7

Area suffix

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

CA-HXGX7 SP-HXGX7SP-HXGX7

TABLE OF CONTENTS

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

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

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

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

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41

COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED

No.MB161

2004/3

SPECIFICATION

Amplifier section-CA-HXGX7

Output Power

SUBWOOFERS 180 W per channel, min. RMS, driven into 6 Ω at 63 Hz with no more than 10 %total

harmonic distortion.

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

harmonic distortion.

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

AUX 300 mV/47 kΩ
Speakers/impedance SUBWOOFERS 6 Ω - 16 Ω

MAIN SPEAKERS 6 Ω - 16 Ω

Tuner

FM tuning range 87.5 MHz - 108.0 MHz

AM tuning range 530 kHz - 1 710 kHz

CD player

CD capacity 5 discs

Dynamic range 87 dB

Signal-to-noise ratio 90 dB

Wow and flutter Immeasurable

MP3 recording format MPEG 1/2 Audio Layer 3

Max. Bit rate 320 kbps

Cassette deck

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

Wow and flutter 0.15 % (WRMS)

General

Power requirement AC 120 V , 60 Hz

Power consumption 245 W/310 VA (at operation) 26 W (on standby)

Dimensions (approx.) 205 mm × 370 mm × 432 mm (W/H/D) (8 1/8 in. × 14 5/8 in. × 17 1/0 16 in.)

Mass (approx.) 10.5 kg (23.2 lbs)

Speaker section-SP-HXGX7

Type 3-Way 4-Speaker Bass-Reflex Type

Speaker Systems Subwoofer 16 cm (6 5/16 in.) cone × 1

Woofer 12 cm (4 3/4 in.) cone × 2
Tweeter 5 cm (2 in.) cone × 1

Power handling capacity Subwoofer 360 (180 + 180) W

Main speaker 160 (80 + 80) W

Impedance Subwoofer 6 Ω

Main speaker 6 Ω

Frequency range Subwoofer 27 Hz - 1000 Hz

Main speaker 70 Hz - 25 000 Hz

Sound pressure level Subwoofer 78 dB/W·m

Main speaker 88 dB/W·m

Dimensions (approx.) 227 mm × 432 mm × 376 mm (W/H/D) (8 15/16 in. × 17 1/16 in. × 14 13/16 in.)

Mass (approx.) 8 kg (17.7 lbs) each

Design and specifications are subject to change without notice.

1-2 (No.MB161)

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.MB161)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 round

Card wire

1-4 (No.MB161)

Pickup

Flexible board

1.8 Importance administering point on the safety

F102

F101

8A-125V

8A-125V

3.15A-125V

F104

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 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 F104.
Ce sont des fusibles suretes qui functionnes rapide.

^

(No.MB161)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB161)

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

A

Metal cover

A

Fig.1

B

Fig.2

Metal cove

B

Fig.3

(No.MB161)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) Disconnect the earth wire from the chassis base. (See

Fig.6.)

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

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

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

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

(7) 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

Earth wire

b

Card wires

Fig.4

CN43

CN44

CN803

Chassis base

Chassis base

Front panel assembly

D

C

b

Earth wire

Fig.6

b

1-8 (No.MB161)

Fig.7

Chassis base

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.)

on the main board. (See

CN560

Tuner Main board

Fig.8

Card wires

E

Rear panel

Fig.9

(No.MB161)1-9

3.1.4 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, disconnect the wire

from the connector CN202
Fig.10.)

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

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

(3) Release the sections d and remove the rear cover. (See

Fig.11.)

(4) Remove the screw H and eleven screws J attaching the

rear panel. (See Fig.12.)

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

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

3.1.5 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, disconnect the wire

from the connector CN202
Fig.10.)

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

and two screws G attaching the rear cover. (See Fig.11.)
(3) Remove the two screws K attaching the fan. (See Fig.12.)
(4) Take out the fan from the main body.

on the bridge board. (See

on the bridge board. (See

Bridge board

CN202

Fig.10

G

F

d

Rear panel

J

Fan

J

d

d

Fig.11

Rear cove

J

K
HK

J

1-10 (No.MB161)

J

ee

Fig.12

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

• Prior to performing the following procedures, remove the metal

cover and rear panel.

Reference:

Remove the tuner as required.
(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.)

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

Fig.14.)

(3) 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 f of the
bridge board in the hole of the main board. (See Fig.14.)

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

, CN44, CN661, CN802,

on the main board to-

on the

Card wires

Card wires

Bridge board

CN802

CN44

Fig.13

f

Main board

CN803

CN661

CN43

Main board

L

CN217

L

f

CN501

Main board

g

Chassis base

Fig.14

(No.MB161)1-11

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

• Prior to performing the following procedures, remove the metal

cover, 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, disconnect the con-

nectors (CN600
amplifier boards from the connection board in the direction
of the arrow. (See Fig.16.)

(3) From the side of the main amplifier/subwoofer amplifier

boards, remove the tie band bundling the wires. (See
Fig.17.)

Reference:

After reassembling, bundle the wires with the tie band.
(See Fig.17.)

(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.)

, CN700) on the main amplifier/subwoofer

, CN208) on the bridge board.

Bridge board

Wires

CN206CN208

Fig.15

Main amplifier board

Subwoofer amplifier board

Heat sink

Connection board

Tie band

P

Q

CN606 CN700

Fig.16

Wires

M

N

1-12 (No.MB161)

Subwoofer amplifier board

Fig.17

Main amplifier board

3.1.8 Removing the connection board

r

(See Fig.18.)

• Prior to performing the following procedure, remove the metal

cover, 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 h and align the projection i of the chassis base to the hole
of the connection board.

R

Connection board

h

i

3.1.9 Removing the bridge board

(See Figs.19 and 20)

• Prior to performing the following procedures, remove the metal

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

from the connectors (CN206
bridge board. (See Fig.19.)

Reference:

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

(2) Disconnect the parallel wires from the connectors (CN201,

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

CN205

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

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

(4) Bend the claw j 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 (k,m)
in the hole of the bridge board. (See Fig.20.)

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

, CN208, CN214) on the

, fix the

Chassis base

Wires

CN206

CN208

Fig.18

Bridge board

CN205

CN213CN201

Fig.19

mk

S

R

n

Bridge board

Parallel wire

CN214

p

Wire holder

S

j

Fig.20

5CD change
mechanism
assembly

(No.MB161)1-13

3.1.10 Removing the 5CD changer mechanism assembly
(See Figs.21 and 23)

• Prior to performing the following procedures, remove the metal

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

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

(2) Take out the 5CD changer mechanism assembly from the

main body.

Reference:

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

(3) From the both and top sides of the 5CD changer mecha-

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

(4) From the top side of the 5CD changer mechanism assem-

bly, remove the three screws W and screw X attaching the
5CD changer mechanism assembly on the plastic chassis.

Reference:

• When reassembling, align the projections (q,r,s) of the plas­tic chassis to the holes of the 5CD changer mechanism as­sembly before attaching the screws W and X. (See Fig.23.)

• Align the projections t of the plastic chassis to the holes of
the main chassis before attaching the screw V. (See Fig.23.)

Front panel assembly

5CD changer mechanism assembly

T

Fig.21

Front panel assembly

5CD changer mechanism assembly

Wires

n

5CD changer
mechanism assembly

W

Main chassis

W

s

W

Fig.22

U

U

Fig.23

T

p

Plastic chassis

t

V

t

r

q

W

Earth wire

X

1-14 (No.MB161)

3.1.11 Removing the primary board

Y

Y

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

• Prior to performing the following procedures, remove the metal
cover, rear panel and main board.
(1) From the top side of the main body, disconnect the wires

from the connectors (CN206
bridge board. (See Fig.19.)

Reference:

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

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

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

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

screws T attaching the 5CD 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
5CD changer mechanism assembly.

(4) Take out the 5CD changer mechanism assembly with the

bridge board from the main body.

Reference:

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

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

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

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

power cord from the connector CN200

, CN208, CN214) on the

, fix the

. (See Fig.25.)

Primary board

,

Chassis base

Fig.24

Primary board

CN200

3.1.12 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 (u, v) 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 AA attaching the FL board.

Reference:

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

on the

Z

Front panel assembly

w

u

Parallel wire

AA

Card wire

Chassis basePower cord

Fig.25

FL board

CN902

Fig.26

AA

Parallel wire

w

AAAA

v

(No.MB161)1-15

3.1.13 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 AB attaching the switch board.

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

x on the switch board to remove the parallel wire.

Reference:

When attaching the switch board, align the projections y in the
holes of the switch board before attaching the screws AB.

3.1.14 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 AC attaching the standby LED board.

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

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

Reference:

When attaching the standby LED board, align the projections
aa in the holes of the standby LED board before attaching the
screws AC.

3.1.15 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) Remove the nut attaching the encoder board. (See Fig.28.)
(3) From the inside of the front panel assembly, disconnect the

card wire from the connector CN902

Fig.26.)
(4) Remove the four screws AA, three screws AB and two

screws AC attaching the each board. (See Figs.26 and 27.)
(5) Take out the FL board with the switch and standby LED

boards.

Reference:

It is not necessary to remove the parallel wires.

(6) Remove the ten screws AD attaching the encoder board.

(See Fig.29.)

Reference:

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

on the FL board. (See

Front panel assembly

AB

y

y

AB

y

AB

y

Parallel wires

Switch board

Front panel assembly Knobs

Standby LED board

Fig.27

Fig.28

AD

AD

ab

AD

Fig.29

aa

Encoder boardFront panel assembly

AC

aa

AC

z

Nut

ab

AD

1-16 (No.MB161)

3.1.16 Removing the microphone board

r

(See Fig.30)

• 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 six

screws AE and screw AE’ attaching the microphone board.

Reference:

• When attaching the microphone board, align the projections

ac of the front panel assembly in the holes of the microphone
board before attaching the screws AE and AE’.

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

3.1.17 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 AF 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.

3.1.18 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 AG and two screws AH attaching the cassette
mechanism assembly.

Reference:

When attaching the cassette mechanism assembly, align the
projections (ad,ae) in the holes of the cassette mechanism as­sembly.

Microphone board

AE AE AE

ac

Front panel assembly

Front panel assembly

AG

ae

AG

ac

ac

Wire holde

AE'AE

Wire

Fig.30

Cassette mechanism assembly

Wire holder

ad

AH

Wire

AF

Headphone board

AH

Fig.31

(No.MB161)1-17

3.2 CD changer mechanism

r

3.2.1 Removing the tray assembly
(See Fig.1 ~ 5)

(1) Remove the two screws A from the top cover and release

the two joints a on both sides of the body.

(2) Remove the top cover with the two rods attached to the top

cover and lifter assembly respectively.
(3) Remove the open det lever on the left side of the body.
(4) Push part b of the slide (R) assembly on the right side of

the body to unlock the tray assembly. Draw out the trays to-

ward the front.

Attention:

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

(5) From top of the body, move the stopper tab c in the direc-

tion of the arrow and release. Pull out the tray assemblies

from the body.

Caution:

Remove the tray assembly from top tray 5 in order.

Attention:

When reattaching the sub tray of the tray assembly, or when
removing the CD remaining inside, refer to another section.

Top cover

Open det leve

Fig.3

c

A

a

Lifter assembly

a

Rod

Fig.1

Top cover

A

a

Tray assembly

(Tray 5)

b

Fig.4

Rod

Lifter assembly

1-18 (No.MB161)

a

Fig.2

Fig.5

3.2.2 Removing the servo control board
(See Fig.6 ~ 9)

Caution:

Solder the short-circuit point on the pickup before disconnect­ing the card wire extending from the pickup. If you do not follow
this instruction, the pickup may be damaged.
(1) Disconnect the card wire from connector CN251

wire from connector CN252
vo control board on the bottom of the body. Disconnect the
wire from joint d.

(2) Solder the short round point on the flexible board of the pick

up.

(3) Remove the four screws B and turn the servo control board

as shown in the figure.

(4) Disconnect the card wire from connector CN601

servo control board.Caution: Unsolder the short-circuit
point after reassembling.

Caution:

When reassembling, twist the wires to be connected to con­nector CN252

3.2.3 Removing the switch board
(See Fig.9)

(1) Disconnect the wires from connector CN252

on the servo control board.
(2) Remove the screw C attaching the switch board.
(3) Release the wires from the slot e of the switch board.

Caution:

When reassembling, let the wires through the slot e of the
switch board and twist them twice.

and CN253 twice.

Servo control board

, CN253 and CN602 on the ser-

and each

on the

and CN253

B

Card wire

Short round

Flexible board

Pickup

Fig.7

Card wire

CN601

CN602

d

B

Fig.6

CN253

CN252

B

CN251

Switch board

Servo control board

Fig.8

Servo control board

CN253

e

CN252

Switch board

C

Fig.9

(No.MB161)1-19

3.2.4 Removing the motor board
(See Fig.10 , 11)

• Prior to performing the following procedure, remove the servo

control board.
(1) Turn over the body and remove the two screws D. Move

the CD module bkt. in the direction of the arrow to release
two joints f.

(2) Unsolder the four soldered parts on the motor of the motor

board.

Caution:

If removing the motor board with the motor, you should
remove the screws attaching the motor from top of the

body(Refer to another section).
(3) Remove the two screws E attaching the motor board.
(4) Remove the spacer fixing the motor board and tray switch

board, and disconnect connector CN2

(5) Disconnect the card wire from connector CN1

board.

Caution:

When reconnecting the card wire, let the card wire through the
slot g of the motor board and attach it to the bottom of the body
using a double tape.

on the motor board.

on the motor

f

f

CD Module

braket

DD

Fig.10

Spacer

Soldering point

CN2

CN1

g

E

E

Motor

Double

face tape

Card wire

Fig.11

1-20 (No.MB161)

3.2.5 Removing the CD tramecha assembly
(See Fig.12)

• Prior to performing the following procedure, remove the servo

control board.
(1) Turn over the body and remove the three screws F attach-

ing the tramecha.

F

F

F

CD Tramecha assembly

Fig.12

(No.MB161)1-21

3.2.6 Removing the pickup
(See Fig.13 , 14)

• Prior to performing the following procedure, remove the servo

control board and CD tramecha assembly.
(1) From top of the CD tramecha assembly, turn the cam gear

in the direction of the arrow to move the pickup assembly
outward.

(2) Push down the stopper h in the direction of the arrow and

pull out the shaft.

(3) Release the joint i of the pickup assembly and mecha

base.

(4) Remove the screw G attaching the CD rack. Release the

four tabs j at the bottom of the CD rack.

Mecha base

h

Stopper

i

Pickup assembly

Shaft

Cam gear

ShaftShaft

Stopper

Fig.13

CD lack

G

Pickup

j

j

1-22 (No.MB161)

j

Fig.14

3.2.7 Removing the side (L)/ tray switch board

(See Fig.15 ~ 17)

• Prior to performing the following procedure, remove the tray

assembly.
(1) Remove the two screws H attaching the side (L) on top of

the body.

(2) From the side of the body, remove the spacer fixing the tray

switch board and motor board. Disconnect connector CN3

on the tray switch board and detach the side (L) upward.
(3) Remove the screw J attaching the tray switch board.
(4) Push the joint tab k of the side (L) in the direction of the ar-

row and remove the tray switch board outward, then re-

lease joint l.

H

Side (L)

H

Fig.15

H

H

CN3

Spacer

Side (L)

Fig.16

k

Side (L)

Tray switch board

Fig.17

l

J

(No.MB161)1-23

3.2.8 Removing the side (R) assembly
(See Fig.18 ~ 22)

• Prior to performing the following procedure, remove the tray

assembly.
(1) Push and release the two tabs m of the gear cover through

the two notches inside the side (R) assembly. Remove the
gear cover outward.

(2) Remove the spring attached to part n of the hook on the

right side of the body.

(3) From top of the body, turn the 1 gear clockwise to move the

elevator cam rearward.Move the two slots o and joint p of
the elevator cam as shown in Fig.21 and remove the ele­vator cam outward.

(4) Remove the three screws K and detach the side (R) up-

ward.

Caution:

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

Side (R) assembly

m

Fig.20

K

Side (R)
assembly

K

Side (R) assembly

K

Fig.18

q

Spring

n

Elevator cam

o

o

p

Fig.21

K

Side (R) assembly

1 gear

Gear cover

1-24 (No.MB161)

Sprihg

K

n

Fig.22

Elevator com

Fig.19

3.2.9 Removing the lifter assembly

(See Fig.23 ~ 27)

• Prior to performing the following procedure, remove the tray

assembly and side (L)/ side (R) assembly.
(1) From top of the body, turn the 1 gear clockwise to move the

lifter assembly upward as shown in Fig.24.

(2) From top of the body, turn the 2 gear clockwise to move the

hook toward the front until it stops.

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

pushing the tab r of the hook stopper to unlock it. Release
four joints s to detach from the rack holder.
Release the rod from part t.

(4) Turn the 1 gear clockwise again to move the lifter assembly

upward.

(5) Remove the lifter assembly from the body upward at posi-

tion u where the four pins on the right and left sides of the
lifter assembly fit to the notches of the v.
Move the lifter assembly toward the front and release from
the hook.

2 gear

1 gear

Hook

t

s

Rod

s

s

r

s

Hook stopper

Fig.25

Lifter assembly

1 gear

u u

Hook stopper

Hook

2 gear

Fig.23

1 gear

Lifter
assembly

Lifter assembly

v

Lifter assembly

Fig.26

u

u

Hook stopper

Hook

Fig.24

v

Fig.27

(No.MB161)1-25

3.2.10 Removing the rack holder assembly/ sensor assembly
(See Fig.28 ~ 33)

• Prior to performing the following procedure, remove the tray

assembly, side (L)/ side (R) assembly, lifter assembly.

Attention:

If the slide gear of the body places at joint w of the rack holder
assembly, turn the 1 gear counterclockwise to move the slide
gear toward the front. Remove the rack holder assembly.
(1) Remove the three screws J attaching the rack holder as-

sembly. Release joint w from the notch.

Caution:

When reattaching the rack holder assembly, do not nip

the wire x extending from the sensor assembly.
(2) Remove the two screws M attaching the sensor assembly.
(3) Move the sensor assembly in the direction of the arrow to

release from the slot at joint y.

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

sembly from the boss z on the sensor slider.

(5) Remove the screw N and O attaching the sensor board and

SV resister respectively.If necessary, unsolder the sensor
board.

Caution:

When reattaching the SV resister, attach the sensor slider to
the sensor bracket and fit the lever on the bottom of the SV re­sister into slot a’ of the sensor slider.

Caution:

When reattaching the rack holder assembly, turn the 1 gear
clockwise to move the slide gear and slide lever inside the
body rearward.

• Let the wire extending from the sensor assembly through notch
x to the bottom of the body.

• Fit pin c’of the slide lever into hole b’ of the sensor slider on
the bottom of the sensor assembly while attaching the spring
to the boss z of the sensor slider.

• Engage joint y of the sensor assembly to the notch of the body.

Rack holder

assembly

Rack holder

assembly

L

w

L

1 gear

x

L

Fig.28

Rack holder

assembly

1-26 (No.MB161)

w

w

Fig.29

x

O

Soldering

SV resister

N

Sensor board

point

M

z

M

Sensor slider

y

a'

Fig.30

b'

Sensor assembly

Spring

Spring

a'

Slide gear

Sensor braket

Sensor slider

Fig.32

M

Sensor assembly

M

y

b'

z

z

Fig.31

c'

Spring

Fig.33

Slide lever

(No.MB161)1-27