Jvc UX-G357, UX-G355 Service Manual
SERVICE MANUAL
MICROCOMPONENTSYSTEM
MB699<Rev.003>200910SERVICE MANUAL
UX-G357E, UX-G357EN, UX-G357EV, UX-G357UT,
UX-G355B, UX-G355E, UX-G355EN, UX-G355EV,
UX-G355A, UX-G355US, UX-G355UB, UX-G355UW,
UX-G355UP, UX-G355UT
SP-UXG355
SP-UXG355
SP-UXG355
CA-UXG357
CA-UXG355
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REMO
RM-SUXG355R
(for Europe)
COPYRIGHT © 2009 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
COPYRIGHT © 2009 Victor Company of Japan, Limited
No.MB699<Rev.003>
2009/10
SPECIFICATION
For Europe
Amplifier section
OUTPUT POWER 60 W (30 W + 30 W) at 6 Ω (10% THD)
Speakers/Impedance 6 Ω - 16 Ω
Audio input AUDIO IN 500 mV/47 kΩ (at “LEVEL 1”)
250 mV/47 kΩ (at “LEVEL 2“)
125 mV/47 kΩ (at “LEVEL 3“)
Digital input USB MEMORY REC/PLAY
Tuner section
FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 522 kHz - 1 629 kHz
CD player section
Dynamic range 88 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
USB section
USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass storage class
Compatible file system FAT16, FAT32
Output power DC 5 V 500 mA
General
Power requirements AC 230 V , 50 Hz
Power consumption 30 W (power on)
8 W (standby)
1 W or less (ECO Mode)
Dimensions (W × H × D) 165 mm × 251 mm × 245 mm
Mass 1.9 kg
Speakers
Speaker units 10 cm cone × 1; 1.5 cm × 1
Impedance 6 Ω
Dimensions (approx.) 140 mm × 251 mm × 141 mm (W/H/D)
Mass (approx.) 1.3 kg each
Specifications and appearance are subject to change without prior notice.
1-2 (No.MB699<Rev.003>)
For Asia
Amplifier section
OUTPUT POWER 60 W (30 W + 30 W) at 6 Ω (10% THD)
Speakers/Impedance 6 Ω - 16 Ω
Audio input AUDIO IN 500 mV/47 kΩ (at “LEVEL 1”)
250 mV/47 kΩ (at “LEVEL 2”)
125 mV/47 kΩ (at “LEVEL 3”)
Digital input USB MEMORY REC/PLAY
Tuner section
FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range 531 kHz - 1 710 kHz (in 9 kHz spacing)
530 kHz - 1 710 kHz (in 10 kHz spacing)
CD player section
Dynamic range 88 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
USB section
USB specification Compatible with USB 2.0 Full Speed
Compatible device Mass storage class
Compatible file system FAT16, FAT32
Output power DC 5 V 500 mA
General
Power requirements AC 110 V-127 V/AC 220 V-240 V adjustable with the voltage selec-
tor, 50 Hz/60 Hz
AC 240 V , 50 Hz (only Australia)
AC 220 V , 50 Hz (only Hong Kong)
Power consumption 30 W (power on)
8 W (standby)
1 W or less (ECO Mode)
Dimensions (W × H × D) 165 mm × 251 mm × 245 mm
Mass 1.9 kg
Speakers
Speaker units 10 cm cone × 1; 1.5 cm × 1
Impedance 6 Ω
Dimensions (approx.) 140 mm × 251 mm × 141 mm (W/H/D)
Mass (approx.) 1.3 kg each
Specifications and appearance are subject to change without prior notice.
(No.MB699<Rev.003>)1-3
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.
1-4 (No.MB699<Rev.003>)
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 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.
Solder short land
(No.MB699<Rev.003>)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
1-6 (No.MB699<Rev.003>)
CAUTION:
DANGER:
INVISIBLE LASER RADIATION WHEN OPEN
DO NOT STARE INTO BEAM
INVISIBLE LASER RADIATION WHEN OPEN
AVOID DIRECT EXPOSER TO THE BEAM
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB699<Rev.003>)1-7
SECTION 3
DISASSEMBLY
3.1 Main body (Used figure are UX-G355E)
3.1.1 Removing the Rear cabinet (See Fig.1 to 4)
(1) Remove the four screws A attaching the Rear cabinet.
(See Fig.1)
(3) Remove the four screws C attaching the Rear cabinet.
(See Fig.3)
AA
C
Fig.1
(2) Remove the four screws B attaching the both side of the
Rear cabinet. (See Fig.2)
(4) Disengage two hooks a engaged Rear cabinet. (See Fig.4)
Fig.3
hook a
C
B
1-8 (No.MB699<Rev.003>)
Fig.4
Fig.2
3.1.2 Removing the SMPS board (See Fig.5)
(1) Disconnect the connector wires from MCU board connect-
ed to connectors CN2
(2) Remove the four screws D attaching the SMPS board.
and CN3 of the SMPS board.
CN2CN3
F
CN201CN210CN208
F
D
Fig.5
3.1.3 Removing the MCU board (See Fig.6, 7)
(1) Remove the two screws E attaching the PCB bracket. (See
Fig.6)
D
E
Fig.6
(2) Remove the three screws F attaching the MCU board. (See
Fig.7)
(3) Disconnect the card wire from Tuner pack connected to
connector CN201
(4) Disconnect the card wire from Display board Connected to
connector CN202
(5) Disconnect the connector wire from USB board connected
to connector CN210
(6) Disconnect the connector wire from CD board connected to
connector CN208
(7) Disconnect the card wire from CD board connected to con-
nector CN207
of the MCU board. (See Fig.7)
of the MCU board. (See Fig.7)
of the MCU board. (See Fig.7)
of the MCU board. (See Fig.7)
of the MCU board. (See Fig.7)
CN202 CN207
Fig.7
3.1.4 Removing the CD mechanism (See Fig.8 to 10)
(1) Disconnect the card wire from Pickup connected to con-
nector CN102
(2) Remove the four screws G attaching the CD mechanism.
(See Fig.9)
of the CD board. (See Fig.8)
CN102
Fig.8
G
G
Fig.9
(No.MB699<Rev.003>)1-9
(3) Disconnect the connector wire from Loader board connect-
ed to connector CN103 of the CD board. (See Fig.10)
(4) Disconnect the connector wire from Traverse mechanism
connected to connector CN104 of the CD mechanism.
(See Fig.10)
CN103
CN104
Fig.10
3.1.5 Removing the CD board (See Fig.11)
(1) Disconnect the connector wire from USB board connected
to connector CN114
(2) Remove the four screws H attaching the CD board.
CN114
of the CD board.
H
(2) Disengage two hooks b engaged both side of the Front
cabinet. (See Fig.13)
hook b
Fig.13
3.1.7 Removing the LCD board (See Fig.14)
(1) Remove the Volume knob.
(2) Remove the eleven screws K attaching the LCD board.
KK
H
Fig.11
3.1.6 Removing the Front cabinet (See Fig.12, 13)
(1) Remove the two screws J attaching the Front cabinet. (See
Fig.12)
J
Fig.12
Fig.14
3.1.8 Removing the USB board (See Fig.15)
(1) Remove the six screws L attaching the USB board.
L
L
Fig.15
1-10 (No.MB699<Rev.003>)
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.MB699<Rev.003>)1-11
Victor Company of Japan, Limited
Audio/Video Systems Division 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MB699<Rev.003>)
Printed in Japan
VSE
PARTS LIST
UX-G357E,UX-G357EN,UX-G357EV
UX-G357UT,UX-G355B,UX-G355E
UX-G355EN,UX-G355EV,UX-G355A
UX-G355US,UX-G355UB,UX-G355UW
UX-G355UP, UX-G355UT
MODEL MARK MODEL MARK MODEL MARK
AUX-G357E BUX-G357EN CUX-G357EV
UX-G357UT
UX-G355EN
UX-G355US
UX-G355UP
* All printed circuit boards and its assemblies are not available as service parts.
D E F
G H I
J K
M NUX-G355UT
UX-G355B UX-G355E
UX-G355EV UX-G355A
UX-G355UB UX-G355UW
- Contents -
Exploded view of general assembly and parts list (Block No.M1)
Electrical parts list (Block No.01~04)
Packing materials and accessories parts list (Block No.M3)
L
3- 2
3- 6
3-14
MB699PAR<Rev.003>
3-1
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