USB specificationCompatible with USB 2.0 Full Speed
Compatible deviceMass storage class
Compatible file systemFAT16, FAT32
Output powerDC 5 V 500 mA
General
Power requirementsAC 230 V , 50 Hz
Power consumption30 W (power on)
1.00 W or less (standby)
Dimensions (W × H × D)165 mm × 251 mm × 245 mm
Mass1.9 kg
Speakers
Speaker units10 cm cone × 1
Impedance6 Ω
Dimensions (approx.)140 mm × 251 mm × 141 mm (W/H/D)
Mass (approx.)1.3 kg each
Designs & specifications are subject to change without notice.
1-2 (No.MB729<Rev.004>)
For Asia
Amplifier section
OUTPUT POWER60 W (30 W + 30 W) at 6 Ω (10% THD)
Speakers/Impedance6 Ω - 16 Ω
Audio inputAUDIO IN500 mV/47 kΩ (at “LEVEL 1”)
250 mV/47 kΩ (at “LEVEL 2”)
125 mV/47 kΩ (at “LEVEL 3”)
Digital inputUSB MEMORY
Tuner section
FM tuning range87.50 MHz - 108.00 MHz
531 kHz - 1 710 kHz (in 9 kHz spacing)
530 kHz - 1 710 kHz (in 10 kHz spacing)
531 kHz - 1 602 kHz (in 9 kHz spacing) (only Saudi Arabia)
530 kHz - 1 600 kHz (in 10 kHz spacing) (only Saudi Arabia)
CD player section
Dynamic range88 dB
Signal-to-noise ratio85 dB
Wow and flutterImmeasurable
USB section
USB specificationCompatible with USB 2.0 Full Speed
Compatible deviceMass storage class
Compatible file systemFAT16, FAT32
Output powerDC 5 V 500 mA
General
Power requirementsAC 110 V-127 V/AC 220 V-240 V adjustable with the voltage selector, 50 Hz/60 Hz
AC 240 V , 50 Hz (only Australia)
Power consumption30 W (power on)
1.00 W or less (standby)
Dimensions (W × H × D)165 mm × 251 mm × 245 mm
Mass1.9 kg
Speakers
Speaker units10 cm cone × 1
Impedance6 Ω
Dimensions (approx.)140 mm × 251 mm × 141 mm (W/H/D)
Mass (approx.)1.3 kg each
Designs & specifications are subject to change without notice.
(No.MB729<Rev.004>)1-3
SECTION 1
PRECAUTION
1.1Safety 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 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
1.2Warning
(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.
1.3Caution
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.
1.4Critical 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.MB729<Rev.004>)
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued 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.
(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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 re-assembling.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) If mains voltage selector is provided, check setting for local voltage.
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.
(No.MB729<Rev.004>)1-5
1.6Preventing 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.
1.6.1 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.
1.7Handling 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.
1.8Attention 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 connector 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 part
1-6 (No.MB729<Rev.004>)
1.9Important 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
(No.MB729<Rev.004>)1-7
SECTION 2
A
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
3.1Main body (Used model: UX-G377E)
3.1.1 Removing the Top cover (See Fig.1, 2, 3, 4)
(1) Remove the four screws A attaching the Top cover. (See
Fig.1)
(2) Remove the four screws B attaching the Top cover. (See
Fig.2)
B
B
Fig.2
(3) Remove the two screws C and two screws D attaching both
side of the Top cover. (See Fig.3)
C
1-8 (No.MB729<Rev.004>)
Fig.1
D
Fig.3
(4) Disengage two hooks a engaged Top cover. (See Fig.4)
hook
a
Fig.4
3.1.2 Removing the MCU board (See Fig.5)
(1) Disconnect the connector wire from MCU board connected
to connector CN3
(2) Disconnect the card wire from Tuner pack connected to
connector CN201
(3) Remove the three screws E attaching the MCU board.
(4) Disconnect the card wire from Display board connected to
connector CN202
(5) Disconnect the connector wire from CD board connected to
connector CN208
(6) Disconnect the connector wire from USB board connected
to connector CN210 of the MCU board.
(7) Disconnect the connector wire from SMPS board connect-
ed to connector CN203
(8) Disconnect the card wire from CD board connected to con-
nector CN207 of the MCU board.
of the SMPS board.
of the MCU board.
of the MCU board.
of the MCU board.
of the MCU board.
CN3
3.1.3 Removing the SMPS board (See Fig.6)
(1) Disconnect the earth wire from Tuner pack connected to
post pin GND
(2) Remove the four screws F attaching the SMPS board.
(3) Disconnect the connector wire from Display board connect-
ed to connector CN5
(4) Disconnect the connector wire from USB board connected
to connector CN1
of the SMPS board.
of the SMPS board.
of the SMPS board.
GND
F
CN5
F
Fig.6
3.1.4 Removing the CD mechanism (See Fig.7, 8, 9, 10, 11)
(1) Remove the two screws G attaching the Back PCB brack-
et. (See Fig.7)
F
CN1
E
CN202 CN203
Fig.5
CN201
CN208
E
CN210
CN207
G
Fig.7
(2) Remove the four screws H attaching the CD mechanism.
(See Fig.8)
H
H
Fig.8
(No.MB729<Rev.004>)1-9
(3) Disconnect the connector wire from CD board connected to
connector of the Loader board. (See Fig.9)
(4) Disconnect the connector wire from CD board connected to
connector of Traverse mechanism. (See Fig.9)
connector of
loader board
(5) Solder the solder short part of the pickup. (See Fig.10)
connector of
traverse mechanism
Fig.9
solder short part
3.1.5 Removing the Front panel (See Fig.12, 13, 14)
(1) Remove the two screws J attaching the Front panel. (See
Fig.12)
J
Fig.12
(2) Disengage two hooks b engaged both side of the Front
panel. (See Fig.13)
hook b
Fig.10
(6) Disconnect the card wire from CD mechanism connected
to connector CN102
CN102
of the CD board. (See Fig.11)
Fig.11
Fig.13
(3) Disconnect the connector wire from USB board connected
to connector CN114
3.1.6 Removing the CD board (See Fig.15)
(1) Remove the four screws K attaching the CD board.
of the CD board. (See Fig.14)
CN114
Fig.14
1-10 (No.MB729<Rev.004>)
KK
Fig.15
3.1.7 Removing the Display board (See Fig.16)
(1) Remove the Volume knob.
(2) Remove the thirteen screws L attaching the Display board.
L
Fig.16
L
3.1.8 Removing the USB board (See Fig.17)
(1) Remove the six screws M attaching the USB board.
M
M
Fig.17
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.MB729<Rev.004>)1-11
Victor Company of Japan, Limited
Home & Mobile Electronics Business Group, Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
* All printed circuit boards and its assemblies are not available as service parts.
MODELMARK
BUX-G377EN
KUX-G375UPLUX-G375UT
MODELMARK
- 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)