JVC MX-JD3 Service Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB32020049
MX-JD3
Area suffix
EE -------- Russian Federation
SP-MXJD3 SP-MXJD3CA-MXJD3
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-47
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.MB320
2004/9
SPECIFICATION
Amplifier section Output Power 100 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 -21 dBm to -15 dBm (660 nm ±30 nm)
Audio input sensitivity/Impedance (Measured at
1 kHz, with tape recording signal 300 mV)
VIDEO OUT Color system NTSC/PAL selectable
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance) : 1 V(p-p)/75Ω
COMPONENT (Interlace/
Progressive)
Speaker Terminals 6 Ω - 16 Ω(Main speakers)
Others AV COMPU LINK × 2 (Ø3.5) 16 Ω - 32 Ω (Surround speakers)
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)
Disc player section Playable disc DVD VIDEO/DVD AUDIO
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
Cassette deck section Frequency response Normal (type I) : 50 Hz - 14 000 Hz
Wow and flutter 0.15 % (WRMS)
General Power requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V ,
Power consumption 135 W (at operation) 17 W (on standby)
Dimensions (approx.) 265 mm × 335 mm × 352 mm (W/H/D)
Mass (approx.) 8.6 kg
Speakers Type 3-Way 3-Speaker Bass Reflex Type
Speaker Systems Woofer 15 cm cone × 1
Mid 5 cm cone × 1
Tweeter 2 cm dome × 1
Power handling capacity 100 W
Impedance 6 Ω
Frequency range 42 Hz - 37 000 Hz
Sound pressure level 83 dB/W·m
Dimensions (approx.) 205 mm × 337 mm × 240 mm (W/H/D)
Mass (approx.) 3.5 kg each
AUX : 300 mV/47 k Ω
MIC 1/2 : 3.0 mV/50 k Ω
C (chrominance, burst) : 0.286 V(p-p)/75Ω
(Y) : 1 V(p-p)/75Ω
(PB/PR) : 0.7 V(p-p)/75Ω
530 kHz - 1 710 kHz (at 10 kHz)
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)
(adjustable with the voltage selector), 50 Hz / 60 Hz
Design and specifications are subject to change without notice.
1-2 (No.MB320)
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.MB320)1-3
1.5 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.6 Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the
replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a
time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.
Short land section
Connector
Pickup
1-4 (No.MB320)
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.MB320)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB320)
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.MB320)1-7
3.1.2 Removing the front panel assembly
(See Figs.4 to 7)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the right side of the main body, remove the screw C
attaching the earth wires on the reverse side of the main
board. (See Fig.4.)
Reference:
After attaching the earth wires, fix them with a spacer as
before. (See Fig.4.)
(2) Remove the plastic rivet attaching the main board. (See
Fig.4.)
(3) From the inside of the main body, disconnect the card wires
from the connectors (CN303
ward side of the main board. (See Fig.4.)
(4) Remove the wire clamp fixing the wires and disconnect the
wires from the connector (CN301
side of the main body. (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 CN101
(See Fig.5.)
(6) Disconnect the wire from the connector CN119 on the
transformer board. (See Fig.5.)
Reference:
After connecting the wire, pass the wire through the slot
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 screw D
and screw D’ attach the front panel assembly to the main
body. (See Fig.6.)
Reference:
When attaching the screw D’, attach the earth wire with
it. (See Fig.6.)
(9) From the bottom side of the main body, remove the two
screws E and two screws F attaching the front panel assembly. (See Fig.7.)
(10) Release the claws a, 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 speaker terminal
Plastic rivet
CN860
CN303
Speaker terminal board
CN106 Parallel wire
Tie band
Transformer board
CN880
Spacer
CN119
wires
Main board
C
Earth wires
Fig.4
Holder board
b
Wire
Parallel
wire
CN101
CN301
CN302
Main board
Wire clamp
1-8 (No.MB320)
Fig.5
Front panel assembly
Fig.6
Front panel assembly
D'
D
a
Earth wire
E
Fig.7
F
a
E
(No.MB320)1-9
3.1.3 Removing the tuner
(See Figs.8 and 9.)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN21
Fig.8.)
(2) From the back side of the main body, remove the two
screws G attaching the tuner to the rear panel. (See Fig.9.)
3.1.4 Removing the video board
(See Figs.8 and 9.)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN410
Fig.8.)
(2) From the back side of the main body, remove the three
screws H attaching the video board to the rear panel. (See
Fig.9.)
on the main board. (See
on the main board. (See
Tuner
CN410 CN21 Main board
Video boardCard wires
Fig.8
H
G
Rear panel
Fig.9
1-10 (No.MB320)
3.1.5 Removing the rear panel
(See Figs.8 to 11)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the back side of the main body, remove the screw J
attaching the rear cover. (See Fig.10.)
(2) Release the sections c and remove the rear cover from the
rear panel. (See Fig.10.)
(3) Remove the two screws K and nineteen 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.MB320)1-11
3.1.6 Removing the DVD mechanism assembly
r
r
(See Figs.12 and 13)
• Prior to performing the following procedures, remove the metal
cover, tuner and video board.
(1) From the top side of the main body, remove the three
screws M attaching the DVD mechanism assembly on the
center chassis. (See Fig.12.)
(2) From the forward side of the main board, disconnect the
card wires from the connectors (CN11
(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.MB320)
3.1.7 Removing the main board
(See Figs.14 and 15)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board and rear panel.
(1) From the right side of the main body, remove the screw N
attaching the earth wires on the reverse side of the main
board. (See Fig.14.)
Reference:
After attaching the earth wires, fix them with a spacer as
before. (See Fig.14.)
(2) Remove the plastic rivet attaching the main board. (See
Fig.14.)
(3) From the inside of the main body, disconnect the card wires
from the connectors (CN11
CN860, CN880) on the forward side of the main board.
(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 body. (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
CN221) on the main board. (See Fig.15.)
(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 of the connector CN216
care not to break the lock. (See Fig.14.)
(7) Release the lock h of the connector CN201 on the primary
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 of the connector CN201
care not to break the lock. (See Fig.14.)
, CN303, CN511, CN513,
. (See Fig.14.)
, CN302) on the forward
on the speaker ter-
, take
in the direction of
, take
Main board
CN880
f
CN860
Plastic
rivet
CN303
Spacer
Earth wires
,
Main board
CN201 Primary board
CN511
CN513 CN11 CN880
Card
wires
CN11 CN513
CN201
N
3
h
2
Fig.14
Card wire
CN511
CN216
CN206 CN216
g
Speaker terminal
board
f
Main
1
board
CN860
CN221
Main boardParallel wire
CN220
wires
CN303
CN301
CN302
Main board
Wire clamp
Fig.15
(No.MB320)1-13
3.1.8 Removing the center chassis assembly
(See Fig.16)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board and rear panel.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN11
main body.
Reference:
When reassembly, pass the card wire through the section f of the main board before connecting the card wire
to the connector CN11
(2) Disconnect the wire from the connector CN105 on the
speaker terminal board.
(3) Remove the two screws P attaching the center chassis as-
sembly.
(4) Take out the center chassis assembly from the main body.
.
, CN511, CN513) on the
CN511
CN513
CN11
Card wire
Main board
f
3.1.9 Removing the fan
(See Fig.17)
• Prior to performing the following procedure, remove the metal
cover, tuner, video board, rear panel and center chassis assembly.
From the bottom side of the center chassis assembly, remove
the two screws Q attaching the fan.
Card
wires
CN105
Speaker terminal board
Fan
P
Wire
Center chassis assembly
Fig.16
Center chassis assembly
1-14 (No.MB320)
Q
Fig.17
3.1.10 Removing the transformer board
(See Fig.18)
• Prior to performing the following procedure, remove the metal
cover, tuner, video board, rear panel and center chassis assembly.
(1) From the top side of the main body, disconnect the wires
from the connectors (CN119
board.
(2) Disconnect the parallel wire from the connector CN101
the transformer board.
(3) Remove the four screws R attaching the transformer board
and take out the transformer board from the bottom chassis.
, CN250) on the transformer
on
R
3.1.11 Removing the speaker terminal board
(See Fig.19.)
• Prior to performing the following procedure, remove the metal
cover, tuner, video board, rear panel, main board and center
chassis assembly.
(1) From the top side of the main body, remove the tie band fix-
ing the parallel wire.
Reference:
After connecting the parallel wire, fix it with the new tie
band.
(2) Disconnect the parallel wire from the connector CN106
the speaker terminal board.
(3) Disconnect the parallel wire from the connector CN219
the primary board.
(4) Release the locks (i, j) of the connectors (CN205
and disconnect the speaker terminal board in an upward direction.
on
on
, CN214)
Power
cord
CN250
Speaker terminal board
CN205
R
Transformer board
Fig.18
i
j
CN101
CN119
CN214
Primary board
R
Wire
CN219
CN106
Speaker terminal board
Tie band
Fig.19
Parallel wire
(No.MB320)1-15
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