JVC JE3 Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB38520054

MX-JE3,MX-JE31

MX-JE3

Area suffix

US ------------------------ Singapore
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UY ------------------------ Argentina
UG --- Turkey,South Africa,Egypt
UE -----------------------------Turkey
UN ----------------------------- Asean

MX-JE31

(SP-MXJE3)

(CA-MXJE3) (SP-MXJE3)

Area suffix

UX -------------------- Saudi Arabia
UG --- Turkey,South Africa,Egypt
UN ----------------------------- Asean

(SP-MXJE31)

(CA-MXJE31) (SP-MXJE31)

TABLE OF CONTENTS

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

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

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

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.MB385

2005/4

SPECIFICATION

Amplifier section Output Power 80 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no

more than 10% total harmonic distortion.

Digital output OPTICAL DIGITAL

OUTPUT

Audio input sensitivity/
Impedance*1

VIDEO OUT Color system NTSC/PAL selectable

Speaker Terminals 6 Ω - 16 Ω (Main speakers)

Tuner section FM tuning range 87.50 MHz - 108.00 MHz

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

For Saudi Arabia only 531 kHz - 1 602 kHz (at 9 kHz)

Disc player section Playable disc DVD Video/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 , (ad-

Power consumption 125 W (at operation) (MX-JE3/JE31)

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

Mass (approx.) 8.0 kg

Speakers Type 3-Way 3-Speaker Bass Reflex Type (Magnetically Shielded

Speakers Woofer 15 cm cone × 1

Power handling capacity 80 W

Impedance 6 Ω

Frequency range 42 Hz - 29 000 Hz

Sound pressure level 83 dB/W

Dimensions (approx.) JE31: 205 mm × 335 mm × 250 mm (W/H/D)

Mass (approx.) JE31: 3.6 kg each

AUX 300 mV/47 kΩ
MIC 1/2 3.0 mV/50 kΩ

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

Midrange 5 cm cone × 1
Tweeter 2 cm dome × 1

-21 dBm to -15 dBm (660 nm ±30 nm)

C (chrominance, burst) : 0.286 V(p-p)/75Ω

530 kHz - 1 710 kHz (at 10 kHz)

530 kHz - 1 600 kHz (at 10 kHz)

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)

justable with the voltage selector), 50 Hz / 60 Hz

17 W (on standby)

type)

·m

JE3: 205 mm × 335 mm × 232 mm (W/H/D)

JE3: 3.5 kg each

*1: Measured at 1 kHz, with tape recording signal 300 mV

Design and specifications are subject to change without notice.

1-2 (No.MB385)

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.MB385)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.

Connector

Short land section

Pickup

1-4 (No.MB385)

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.MB385)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB385)

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

A

Fig.1

Metal cover

B

A

Fig.2

B

B

Fig.3

(No.MB385)1-7

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

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

wire from the connector CN103
(See Fig.5.)

(6) Disconnect the wire from the connector CN119

transformer board. (See Fig.5.)

Reference:

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

(7) 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 b of the holder board as before. (See Fig.5.)

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

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

(9) 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.)

(10) Release the claws a and 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 transformer board.

on the

on the speaker terminal

Plastic rivet

CN860

CN303

Speaker terminal board

CN880

Spacer

Earth wires

CN106

Parallel wire

Main board

C

Fig.4

Holder board

b

Wire

Parallel
wire

CN103

1-8 (No.MB385)

Tie band

wires

Transformer board

CN119

CN301

CN302

Main board

Wire clamp

Fig.5

Front panel assembly

D

D

Fig.6

Front panel assembly

Fig.7

a

E

F

a

E

(No.MB385)1-9

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

• Remove the metal cover.

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

wire from the connector CN21 on the main board. (See
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.)

• 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 screw H

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

on the main board. (See

Tuner

CN410 CN21 Main board

Video boardCard wires

Fig.8

Tuner

H

Video board

G

Rear panel

Fig.9

1-10 (No.MB385)

3.1.5 Removing the rear panel

(See Figs.10 and 11)

• 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 fifteen screws L attaching

the rear panel. (See Fig.11.)

Reference:

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

(4) 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

e e

L

Bottom chassis

d

L

K

Fig.11

(No.MB385)1-11

3.1.6 Removing the DVD mechanism assembly

r

r

(See Figs.12 and 13)

• 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
(See Fig.12.)

Reference:

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

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

Reference:

After connecting the card wires, fix them with the spacers
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.)

, CN511, CN513).

DVD mechanism assembly

M

Main board

Card wire

Center chassis

M

Space

Card
wires

Space

CN513CN11

CN511

f

Card wire

Fig.12

DVD mechanism assembly

Tray fitting

Fig.13

1-12 (No.MB385)

3.1.7 Removing the main board

(See Figs.14 and 15)

• 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

, CN880) on the forward side of the main board.

CN860

(See Figs.14 and 15.)

Reference:

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

(4) 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.)

(5) Disconnect the parallel wire from the connectors (CN220

) on the main board. (See Fig.15.)

CN221

(6) 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 CN216
minal board toward this side. (See Fig.14.)

Note:

When releasing the lock g, take care not to break it. (See
Fig.14.)

(7) Release the lock h of the connector CN201

board in the direction of the arrow 2 and disconnect the
main board from the connector CN201
the arrow 3. (See Fig.14.)

Note:

When releasing the lock h, take care not to break it. (See
Fig.14.)

, CN303, CN511, CN513,

. (See Fig.14.)

, CN302) on the forward

on the speaker ter-

on the primary

in the direction of

CN880

f

CN860

Plastic
rivet

CN303

Spacer

Earth wires

,

Main board

CN201

CN511

CN513

Card
wires

Main board

CN201

N

3

h

2

Primary board

Fig.14

Card wire

CN11

CN880

CN513

CN11

CN216

1

Speaker terminal
board

Main board

f

CN511

CN216

CN206

g

CN860

CN221

Main boardParallel wire

CN220

wires

CN303

CN301

CN302

Main board

Wire clamp

Fig.15

(No.MB385)1-13