JVC UX-G950VB User manual

SERVICE MANUAL
COPYRIGHT © 2008 Victor Company of Japan, Limited No.MB682<Rev.001>
2008/8
MICRO COMPONENT SYSTEM
MB682<Rev.001>20088SERVICE MANUAL
UX-G950VB, UX-G950VE, UX-G950VEN,
UX-G950VEV, UX-G950VEE, UX-G650B,
UX-G650E, UX-G650EN, UX-G650EV
COPYRIGHT © 2008 Victor Company of Japan, Limited
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)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
CA-UXG650
SP-UXG650
SP-UXG650
SP-UXG950V SP-UXG950VCA-UXG950V
SUPER VIDEO
SUPER VIDEO
UX-G950VB / UX-G950VE
UX-G950VEE / UX-G950VEV
UX-G950VEE
UX-G950V
UX-G650

1-2 (No.MB682<Rev.001>)
SPECIFICATION
UX-G950V
Amplifier section - CA-UXG950V
Output Power 160 W (80 W + 80 W) at 6 Ω(10% THD)
Audio Input AUDIO IN Stereo min. (Ø3.5 mm)
500 mV/47 kΩ(at “IN_LVL1”)
250 mV/47 kΩ(at “IN_LVL2”)
125 mV/47 kΩ(at “IN_LVL3”)
Audio input/output AV-Scart Input: TV Sound only
SUBWOOFER OUT 500 mV/10 kΩ
Digital output OPTICAL DIGITAL OUT -21 dBm to -15 dBm (660 nm ±30 nm)
Digital input USB MEMORY REC/PLAY
AV (SCART) Color system PAL (interlaced/progressive)
Composite video 1 V(p-p)/75 Ω
S-VIDEO Y (luminance) 1 V(p-p)/75 Ω
C (chrominance, burst) 0.3 V(p-p)/75 Ω
RGB 0.7 V(p-p)/75 Ω
VIDEO OUT
(COMPONENT) (Y) 1 V(p-p)/75 Ω
(PB/PR) 0.7 V(p-p)/75 Ω
Speaker impedance 6 Ω- 16 Ω
Tuner section
FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 522 kHz - 1 629 kHz
Disc player section
Playable disc •DVD Video/CD/VCD/SVCD/
•CD-R/CD-RW (CD/SVCD/VCD/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/DivX format)
•DVD-R/-RW (DVD-VR/DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/DivX format)
•+R/+RW (DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/DivX format)
•DVD-ROM (MP3/WMA/WAV format)
Dynamic range 80 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
USB section
Playable files MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/DivX format
USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass storage class
Compatible system FAT16, FAT32
Bus power supply DC 5 V=500 mA
General
Power requirements AC 230 V~, 50 Hz
Power consumption 155 W (at operation)
18 W (at standby)
1 W or less (at ECO mode)
Dimensions (approx.) 166 mm ×252 mm ×304 mm (W/H/D)
Mass (approx.) 5.4 kg

(No.MB682<Rev.001>)1-3
Specifications and appearance are subject to change without prior notice.
UX-G650
Specifications and appearance are subject to change without prior notice.
Speakers - SP-UXG950V
Speaker units Tweeter 4 cm cone x 1
Woofer 12 cm cone x 1
Impedance 6 Ω
Dimensions (approx.) 160 mm ×250 mm ×179 mm (W/H/D)
Mass (approx.) 2.2 kg each
Amplifier section
OUTPUT POWER 120 W (60 W + 60 W) at 6 Ω(10% THD)
Speakers/Impedance 6 Ω- 16 Ω
Audio input AUDIO IN 500 mV/47 kΩ(at “IN LVL1”)
250 mV/47 kΩ(at “IN LVL2”)
125 mV/47 kΩ(at “IN LVL3”)
Digital input USB MEMORY REC/PLAY
Tuner section
FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 522 kHz - 1629 kHz
Disc player section
Dynamic range 88 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
USB storage
USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass storage class
Compatible file system FAT16, FAT32
Bus power supply Max. 500 mA
Speakers
Speaker units 4 cm cone x 1
12 cm cone x 1
Impedance
Dimensions (approx.) 160 mm x 250 mm x 179 mm (W/H/D)
Mass (approx.) 2.2 kg each
General
Power requirements AC 230 V~, 50 Hz
Power supply to USB mass storage class device DC 5 V=500 mA
Power consumption 130 W (power on)
16 W (standby mode)
1 W or less (ECO Mode)
Dimensions (W x H x D) 166 mm x 252 mm x 304 mm
Mass 4.9 kg

1-4 (No.MB682<Rev.001>)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety 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 per-
formed 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 characteris-
tics are often not evident fromvisual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
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, 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure theproduct
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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-typecapacitor 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.).
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 selectoris provided, check setting for local
voltage.
1.3 Caution
Burrs formedduring molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

(No.MB682<Rev.001>)1-5
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.
(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 conditionof the laser diode in the optical pickup. Thetester'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 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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Solder short land section

1-6 (No.MB682<Rev.001>)
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.
REPRODUCTION AND POSITION OF LABELS and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL and PRINT

(No.MB682<Rev.001>)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are UX-G950VE)
3.1.1 Removing the Metal cover (See Fig.1, 2)
(1) Remove the two screws Aattaching the Heat sink cover.
(See Fig.1)
(2) Remove the five screws Battaching the Metal cover. (See
Fig.1)
(3) Remove the two screws Cattaching the both side of Metal
cover. (See Fig.2)
Fig.1
Fig.2
A
B
B
B
B
B
C

1-8 (No.MB682<Rev.001>)
3.1.2 Removing the Front panel (see Fig.3 to 5)
(1) Disconnect the card wire from Front panel connected to
connector CN330 of the Micom board. (See fig.3)
(2) Remove the two screws Dattaching the both side of Front
panel. (See Fig.4)
(3) Disengage two hooks aengaged Front panel. (See Fig.4)
(4) Remove the two screws Eattaching the Front panel. (See
Fig.5)
(5) Disengage one hook bengaged Front panel. (See Fig.5)
Fig.3
Fig.4
Fig.5
3.1.3 Removing the Tuner pack (See Fig.6, 7)
(1) Disconnect the card wire from Tuner pack connected to
connector CN338 of the Micom board. (See Fig.6)
(2) Remove the two screws Fattaching the Tuner pack. (See
Fig.7)
Fig.6
Fig.7
CN330 hook a
D
EE hook b
CN338
F

(No.MB682<Rev.001>)1-9
3.1.4 Removing the Amp board (See Fig.8 to 10)
(1) Disconnect the Connector wire from Front jack board con-
nected to connector CN201 of the Amp board. (See Fig.8)
(2) Disconnect the card wire from Micom board connected to
connector CN204 of the Amp board. (See Fig.8)
(3) Disconnect the flat wires connected to connectors CN207
and CN208 of the Amp board. (See Fig.8)
(4) Disconnect the card wire from Micom board connected to
connector CN205 of the Amp board. (See Fig.8)
(5) Disconnect the card wire from DVD mechanism connected
to connector CN213 of the Amp board. (See Fig.8)
(6) Disconnect the flat wire from Front jack board connected to
connector CN203 of the Amp board. (See Fig.8)
(7) Disconnect the connector wire from Power transformer
connected to connector CN209 of the Amp board. (See
Fig.8)
(8) Disconnect the flat wire s from Power board connected to
connectors CN210, CN211 and CN212 of the Amp board.
(See Fig.8)
(9) Disconnect the connector wire from FAN connected to con-
nector CN206 of the Amp board. (See Fig.8)
(10) Remove the two screws Gattaching the Amp board. (See
Fig.8)
(11) Remove the two screws Hattaching the Heat sink bracket.
(See Fig.9)
(12) Remove the one screw Jattaching the Amp board. (See
Fig.9)
(13) Remove the two screws Kattaching the Speaker terminal.
(See Fig.10)
Fig.8
Fig.9
Fig.10
GG
CN201
CN207
CN208
CN205
CN204 CN203
CN213
CN209
CN212
CN211
CN210
CN206
J
H
K

1-10 (No.MB682<Rev.001>)
3.1.5 Removing the Rear panel (See Fig.11)
(1) Remove the seven screws Lattaching the Rear panel.
Fig.11
3.1.6 Removing the DVD mechanism (See Fig.12, 13)
(1) Disconnect the connector wire from Front jack board con-
nected to connector CN811 of the Front end board. (See
Fig.12)
(2) Disconnect the card wires connected to connectors
CN345, CN353 and CN361 of the Micom board. (See
Fig.13)
Fig.12
Fig.13
L
L
CN811
CN345
CN353
CN361

(No.MB682<Rev.001>)1-11
3.1.7 Removing the Micom board (See Fig.14)
(1) Remove the two screws Mattaching the Micom board.
Fig.14
3.1.8 Removing the Front jack board (See Fig.15)
(1) Remove the three screws Nattaching the Front jack board.
Fig.15
3.1.9 Removing the Power board (See Fig.16)
(1) Disconnect the connector wires from Power transformer
connected to connectors CN800, CN804 and CN805 of the
Power board.
(2) Remove the two screws Pattaching the power board.
Fig.16
3.1.10 Removing the FL board (See Fig.17)
(1) Disengage four hooks cengaged FL board.
Fig.17
M
N
P
CN800
CN805 CN804
hook c
hook c

1-12 (No.MB682<Rev.001>)
3.1.11 Removing the Function board (See Fig.18)
(1) Remove the Volume knob.
(2) Remove the nine screws Qattaching the Function board.
Fig.18
Q
Q

(No.MB682<Rev.001>)1-13
3.2 DVD mechanism
3.2.1 Removing the traverse mechanism
(See Fig.1 to 6)
(1) Remove the two screws Aattaching the tramecha holder
from top side of DVD mechanism assembly. (See Fig.1)
(2) Remove the two screws Battaching the DVD module
board. (See Fig.2)
(3) Remove the four screws Cattaching the CB holder and
take out it. (See Fig.3)
(4) Remove the four screws Dattaching the traverse mecha-
nism. (See Fig.4)
(5) Solder the solder part of DVD pick up. (See Fig.5)
(6) Disconnect the card wire from CN101 and CN201 on the
DVD module board. (See Fig. 6)
Caution:
• Solder the short land section on the DVD pickup before dis-
connecting the card wire from the connector on the DVD
pickup.If thecard wire is disconnected without attaching sol-
ders, the pickup may be destroyed by static electricity.
• When attaching the DVD pickup, be sure to remove solders
from the short land section after connecting the card wire to
the connector on the DVD pickup.
Fig.1
Fig.2
A
A
Clamper base
DVD mechanism assembly
B
B
DVD module board
DVD mechanism assembly

1-14 (No.MB682<Rev.001>)
Fig.3
Fig.4
Fig.5
Fig.6
CC
C
C
DVD module board
DD
Traverse mechanism assembly
DVD mechanism assembly
Solder short land section
CN101
CN201
DVD module board

(No.MB682<Rev.001>)1-15
3.2.2 Removing the pickup assembly
(See Fig.7 to 11)
(1) Remove the two rod springs pressing the guide shaft. (See
Fig.7)
(2) Remove the screw Eand Fattaching the spring holder.
(See Fig.8)
(3) Remove the read screw from traverse mechanism assem-
bly. (See Fig.9)
Caution:
When remove the lead screw, do not loss the middle
gear. (See Fig.10 and 11)
(4) Remove the bar spring pressing the shaft. (See Fig.10)
(5) Take out the pickup assembly from traverse mechanism
chassis by order. (See Fig.11)
Fig.7
Fig.8
Fig.9
Fig.10
Fig.11
ROD SPRING ROD SPRING
EF
Spring holder
Lead screw
Middle gear
(T.TABLE)
HOOK
(SHAFT)
(BAR SPRING)
order 1
order 2
order 3

1-16 (No.MB682<Rev.001>)
3.2.3 Removing the feed motor assembly
(See Fig.12)
(1) Remove the one screw Gattaching the feed motor assem-
bly.
(2) Remove the feed motor wires from solder part of spindle
motor board.
Fig.12
3.2.4 Removing the spindle motor assembly
(See Fig.13)
(1) Remove the three screws Hattaching the spindle motor
from spindle motor board.
Fig.13
Lead screw
Middle gear
Solder part
G
Spindle motor
H

(No.MB682<Rev.001>)1-17
3.2.5 Removing the tray assembly
(See Fig.14 & 15)
(1) Remove the two screws Jattaching the clamper base.
(See Fig.14)
(2) Remove the one screw Kattaching the shaft guide from
bottom side. (See Fig.14)
(3) Remove the two screws Lattaching the shaft guide from
top side. (See Fig.15)
Caution:
When attach the tray assembly, boss of loading sub assembly
should attach to guide of bottom side at tray assembly. (See
Fig.15)
Fig.14
Fig.15
J
order 1
order 2
clamper base
K
[bottom side]
L

1-18 (No.MB682<Rev.001>)
SECTION 4
ADJUSTMENT
4.1 ATTENTION IN SERVICE OF DVD SECTION
(1) When pickup, Flash ROM ,DVD module board were changed, initialize EEPROM by all means.
(2) When full initialization was excuted, excute learning with a DVD test disc by all means.
Test disc : VT-501, VT-502
Learning method : It is adjusted automatically by normal playback of a DVD disc.
4.2 DVD/CD TEST MODE
CAUTION:
The operation please use the button of the main body.
(1) Press "DVD/CD" key + "STOP" key on panel, then AC in.
(2) FL display "T **# $&"
** is Destination
# is Region Code
$ is Learning Condition
& is Initialize Condition
(3) Press "MENU/PL" key repeatedly, until FL display "CHECK"
(4) Press number key on Remote Control "1-10, 0 and >=10"
Key 1 : "PLAYBACK"
Key 2 : "WOBBLE"
Key 3 : "TNO-1 SR"
Key 4 : "CDLD LSR"
Key 5 : "DVDLDLSR"
Key 6 : " JITX1 "
Key 7 : "EEP BWD"
Key 8 : "EEP FWD"
Key 9 : " TEMP "
Key 10 : " DVD-DL "
Key 0 : " MONITOR "
Key >=10 : " INIT "

(No.MB682<Rev.001>)1-19
4.3 SYSTEM MICOM TEST MODE
CAUTION:
The operation please use the button of the remote controller.
(1) In DVD/CD mode, press "SET" key + "9" key + "POWER" key repeatedly.
4.4 GENERAL
CAUTION:
The operation please use the button of the remote controller.
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
System Micom version
G650 : "51353 00" (1st issued)
G950V : "50852 01" (1st issued + ROM Corr)
Model name
eg : "G650"
eg : "G950V"
Set destination
eg: "V_U1_9K"
(FL ALL DISPLAY)
DVD/CD Micom version
"DVD 0268"
KEY INDICATION FUNCTION
SET + "10" + POWER COLD COLD START
(Initialization of set)
SET + "4" + POWER VOLUME20 -> VOL MAX Volume level to max by compulsion
SET + "9" + POWER Refer SYSCOM TEST Refer SYSCOM TEST
SET + ">=10" + POWER (FL ALL DISPLAY) FL all display
SET + "1" + POWER 00000:00 ->
TMP 0000 ->
L.DET 00 ->
V.DROP 0 ->
FAN 00 0 ->
Total DVD/CD mode play time by Hour:Minutes ->
Mecha temperature data ->
Spk level detect over trigger level by percentage, % ->
Volume level drop, 1, 2 then 3, each -2db ->
Fan level detect over trigger level by percentage, % and on(1)/off(0) ->

(No.MB682<Rev.001>)
VPT
Printed in Japan
Victor Company of Japan, Limited
Audio/Video Systems Division 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan