JVC DX U10 Service Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB616<Rev.002>20084SERVICE MANUAL
DX-U10A, DX-U10US, DX-U10UX, DX-U10UG,
DX-U10UN, DX-U8US, DX-U8UX, DX-U8UG,
DX-U8UN, DX-U6US, DX-U6UX, DX-U6UG,
DX-U6UN, DX-U10UH
SP-DXU10W SP-DXU10W
SP-DXU10S SP-DXU10S
COPYRIGHT © 2008 Victor Company of Japan, Limited
SP-DXU10F SP-DXU10F
SP-DXU10W
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
CA-DXU10
SUPER VIDEO
CA-DXU6
SP-DXU6F SP-DXU6F
SP-DXU10C
SP-DXU10W
SP-DXU8S
SUPER VIDEO
CA-DXU8
SP-DXU10F
SP-DXU8S
SP-DXU10F
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
SP-DXU10C
COPYRIGHT © 2008 Victor Company of Japan, Limited
No.MB616<Rev.002>
2008/4
SPECIFICATION
DX-U10/DX-U8
Amplifier section Output Power FRONT SPEAKERS 150 W per channel, min. RMS, driven into 4 Ω at 1 kHz with
CENTER SPEAKER CA-DXU10 140 W per channel, min. RMS, driven into 6 Ω at 1 kHz with
CA-DXU8 50 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no
SURROUND SPEAKERS CA-DXU10 130 W per channel, min. RMS, driven into 6 Ω at 1 kHz with
CA-DXU8 50 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no
SUBWOOFERS 150 W, min. RMS, driven into 4 Ω at 63 Hz with no more than
Digital output OPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm ±30 nm)
Digital input USB memory
Audio input sensitivity/
Impedance
VIDEO OUT Color system PAL/PAL PROG/NTSC/NTSC PROG selectable
Speaker Terminals 4 Ω - 16 Ω (front speakers/subwoofers)
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)
AM (MW) tuning range for Saudi Arabia 531 kHz to 1 602 kHz (9 kHz)
Disc/file player section Region codes Middle East: 2
Playable disc DVD Video/DVD Audio/CD/VCD/SVCD
Playable file MP3, WMA, WAV, JPEG, MPEG-1, MPEG-2, ASF, DivX for-
Dynamic range 80 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
USB storage section USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass Storage Class
Compatible file system FAT16, FAT32
Bus power supply 5 V / 500 mA
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 requirement: For Australia AC 240 V , 50 Hz
Power consumption CA-DXU10 300 W (at operation) / 22 W (on standby)
Dimensions (W/H/D) (approx.) 185 mm × 460 mm × 370 mm
Mass (approx.) CA-DXU10 11.5 kg
AUX(STEREO) 400 mV/47 kΩ
MIC1/MIC 2 3.0 mV/50 kΩ
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance) : 1 V(p-p)/75 Ω
COMPONENT
(Interlace/Progressive)
CA-DXU8 270 W (at operation) / 21 W (on standby)
CA-DXU8 11.4 kg
no more than 10% total harmonic distortion.
no more than 10% total harmonic distortion.
more than 10% total harmonic distortion.
no more than 10% total harmonic distortion.
more than 10% total harmonic distortion.
10% total harmonic distortion.
C (chrominance, burst) : PAL : 0.3 V(p-p)/75 Ω
C (chrominance, burst) : NTSC : 0.286 V(p-p)/75 Ω
(Y) : 1 V(p-p)/75 Ω
(PB/PR) : 0.7 V(p-p)/75 Ω
6 Ω - 16 Ω (surround/center speakers)
530 kHz - 1 710 kHz (at 10 kHz)
530 kHz to 1 600 kHz (10 kHz)
South East Asia: 3
Central and South America, Australia: 4
CD-R/CD-RW (CD/VCD/SVCD/MP3/WMA/WAV/JPEG/
MPEG-1/MPEG-2/ASF/DivX format)
CD-ROM (MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/
DivX format)
DVD-R/-RW (DVD-VR/DVD Video/DVD Audio/MP3/WMA/
WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)
+R/+RW (DVD Video/DVD Audio/MP3/WMA/WAV/JPEG/
MPEG-1/MPEG-2/ASF/DivX format)
DVD-ROM (DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/
MPEG-2/ASF/DivX format)
mat
(adjustable with the voltage selector), 50 Hz / 60 Hz
Measured at 1 kHz, with tape recording signal 400 mV
Design and specifications are subject to change without notice.
1-2 (No.MB616<Rev.002>)
DX-U6
Amplifier section Output Power FRONT SPEAKERS 150 W per channel, min. RMS, driven into 4 Ω at 1 kHz with no more
than 10% total harmonic distortion.
SUBWOOFER 150 W, min. RMS, driven into 4 Ω at 63 Hz with no more than 10% t otal
harmonic distortion.
Digital output OPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm ±30 nm)
Digital input USB memory
Audio input sensitivity/
Impedance
VIDEO OUT Color system PAL/PAL PROG/NTSC/NTSC PROG selectable
Speaker Terminals 4 Ω - 16 Ω (main speakers/subwoofer)
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)
AM (MW) tuning range: For Saudi Arabia 531 kHz to 1 602 kHz (9 kHz)
Disc/file player section Region codes Middle East: 2
Playable disc DVD Video/DVD Audio/CD/VCD/SVCD
Playable file MP3, WMA, WAV, JPEG, MPE G-1, MPEG -2, ASF , DivX form at
Dynamic range 80 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
USB storage section USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass Storage Class
Compatible file system FAT16, FAT32
Bus power supply 5 V / 500 mA
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 , (adjustable
Power requirement: For Australia AC 240 V , 50 Hz
Power consumption 200 W (at operation)
Dimensions (W/H/D) (approx.) 185 mm × 460 mm × 370 mm
Mass (approx.) 10.5 kg
AUX 400 mV/47 kΩ
MIC1/MIC2 3.0 mV/50 kΩ
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance) : 1 V(p-p)/75 Ω
C (chrominance, burst) : PAL : 0.3 V(p-p)/75 Ω
C (chrominance, burst) : NTSC : 0.286 V(p-p)/75 Ω
COMPONENT
(Interlace/Progressive)
(Y) : 1 V(p-p)/75 Ω
(PB/PR) : 0.7 V(p-p)/75 Ω
16 Ω - 32 Ω (matrix surround speakers)
530 kHz - 1 710 kHz (at 10 kHz)
530 kHz to 1 600 kHz (10 kHz)
South East Asia: 3
Central and South America, Australia: 4
CD-R/CD-RW (CD/VCD/SVCD/MP3/WMA/WAV/JPEG/MPEG-1/
MPEG-2/ASF/DivX format)
CD-ROM (MP3/WMA/WAV/JPE G/MPEG-1/MPEG-2/ASF/DivX for-
mat)
DVD-R/-RW (D VD -VR/DVD Video/DVD Audio/MP3/WMA/WAV/
JPEG/MPEG- 1 /MPEG-2/ASF /D ivX format)
+R/+RW (DVD Video/DVD Audio/MP3/WMA/WAV/JPEG/MPEG -1/
MPEG-2/ASF/DivX format)
DVD-ROM (DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/
ASF/DivX format)
with the voltage selector), 50 Hz / 60 Hz
19 W (on standby)
Measured at 1 kHz, with tape recording signal 400 mV
Design and specifications are subject to change without notice.
(No.MB616<Rev.002>)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits an d compo nents spec ially f or saf ety purpos es. 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 respons ibility for p ersonal injury or p roperty
damage resulting therefro m.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are often not eviden t from visu al inspec tion nor ca n the
protection afforded by the m necessaril y be obtained by using replacement compo nents rated for higher vo ltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts Lis t of Se rvice Manual. Electrical components having such features
are identified by shadin g on the schema tics and by ( ) on
the Parts List in the Servic e Manual. The use of a s ubstitute
replacement whic h d oe s not ha ve the same safety c ha rac teristics 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, barri ers and the l ik e to b e se para ted 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, co ntrol shaf ts, etc.) to be sure t he prod uct
is safe to operate w ithou t dange r of el ectric al sh ock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tes t er" , me as ure t he l eak ag e current
from each exposed metal pa rts of the cabine t, particula rly any exposed metal part having a return path to the
chassis, to a know n good earth ground. Any le akage 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 mann er. C o nne ct a 1,50 0Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor betw een an exposed 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 essen tial that sa fety critic al com ponen ts ar e repl aced
by approved parts.
(5) If mains voltage selector is pro vided, ch eck set ting for loc al
voltage.
1.3 Caution Burrs formed during molding ma y 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 di agra ms , 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.
1-4 (No.MB616<Rev.002>)
1.5 Preventing static electricity
Electrostatic discharge (ESD), w hi ch occurs w hen sta tic ele ct ricit y sto red i n the bod y, fa bric , etc. is discharged, ca n de stroy 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 th e laser dio de in the opt ical pi ckup. The tes ter's inte rnal power source ca n 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 nip pers, etc. afte r replacing th e optical pi ckup. For speci fic details, refe r to the
replacement procedure in th e t ext . R em ove the anti-static pin w he n re pla cing the traverse unit. Be c arefu l not to tak e to o l on g 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 card wire is disconnected from the connecto on the servo board. (If the card 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 card wire.
DVD changer mechanism assembly
DVD servo board
Switch board
DVD traverse mechanism assembly
(No.MB616<Rev.002>)1-5
1.8 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or 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 and PRINT
WARNING LABEL and PRINT
1-6 (No.MB616<Rev.002>)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB616<Rev.002>)1-7
SECTION 3
A
DISASSEMBLY
3.1 Main body (Using figures are DX-U10)
3.1.1 Removing the METAL COVER
(See Fig.1, 2)
(1) Remove the eight screws A attachi ng the METAL COVER.
(See Fig.1)
(2) Remove the six screws B attaching the both side of the
METAL COVER. (See Fig.2)
B
Fig.1
A
Fig.2
1-8 (No.MB616<Rev.002>)
3.1.2 Removing the DVD CHANGER MECHANISM assembly
(See Fig.3 to 6)
(1) Remove the two screws C attaching the DVD MECHA-
NISM assembly. (See Fig.3)
(2) Disconnect the card wires from DVD MECHANISM assem-
bly connected to conne ctor CN800
BOARD assembly. (See Fig.4)
(3) Disconnect the connector wire from USB board connected
to connec tor CN811
Fig.5)
(4) Disconnect the card wires from DVD BOARD assembly
connected to connector CN921
board assembly. (See Fig.6)
of the DVD BOARD assembly. (See
and CN810 of the MAIN
and CN930 of the VIDEO
CN811
Fig.5
C
Fig.3
C
CN921
CN930
Fig.6
CN800
Fig.4
CN810
(No.MB616<Rev.002>)1-9
3.1.3 Removing the VIDEO BOARD assembly
(See Fig.7, 8)
(1) Disconnect the card wire from MAIN BOARD assembly
connected to connector CN920 of the VIDEO BOARD assembly. (See Fig.7)
(2) Disconnect the card wi re from SURROUND AM P BOARD
assembly connected to connector CN931
BOARD assembly. (See Fig.7)
(3) Remove the three screws D attaching the VIDEO BOARD
assembly. (See Fig.8)
of the VIDEO
CN920 CN931
Fig.7
D
3.1.4 Removing the MECHA CHASSIS
(See Fig.9, 10)
(1) Remove the two screws E attaching the MECHA CHAS-
SIS. (See Fig.9)
(2) Remove the two screws F attaching the both side of
MECHA CHASSIS (See Fig.10)
Fig.8
E
Fig.9
F
Fig.10
1-10 (No.MB616<Rev.002>)
3.1.5 Removing the REAR COVER with FAN
(See Fig.11, 12)
(1) Remove the One screw G attaching the REAR COVER.
(See Fig.11)
(2) Disengage six hooks a engaged REAR COVER. (See
Fig.11)
(3) Disconnect the connector wir e from FA N connected to con-
nector CN304
(See Fig.12)
of the SURROUND AMP BOARD assembly.
G
hook
a
hook
a
Fig.11
Fig.12
(No.MB616<Rev.002>)1-11
CN304
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