JVC UX S57 Service Manual
SERVICE MANUAL
MICRO COMPONENT SYSTEM
MB21120045
UX-S57
Area suffix
A ------------------------ Australia
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe
CA-UXS57 SP-UXS57SP-UXS57
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.MB211
2004/5
SPECIFICATION
Amplifier Section-CA-UXS57 Output Power (IEC 268-3) 120 W (60 W + 60 W) at 6 Ω (10% THD)
Analog input sensitivity/Impedance (at 1 kHz) AUX/DVD:400 mV/48 kΩ
Speakers/Impedance 6 Ω - 16 Ω
Tuner FM tuning range 87.50 MHz-108.00 MHz
AM (MW) tuning range 522 kHz-1 629 kHz
CD player CD Capacity 5 CDs
Dynamic range 87 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
General Power requirement AC 230 V , 50 Hz
Power consumption 110 W (at operation)
17 W (on standby)
1.4 W (in power save mode)
Dimensions (W/H/D) (approx.) 175 mm × 240 mm × 378 mm
Mass (approx.) 7.4 kg
Speaker Section-SP-UXS57 Type 2-way bass-reflex type
Speakers Woofer 12 cm cone × 1
Tweeter 4 cm cone × 1
Power handling capacity 60 W
Impedance 6 Ω
Frequency range 53 Hz to 30 kHz
Sound pressure level 84 dB/W·m
Dimensions (W/H/D) (approx.) 145 mm × 239.5 mm × 202 mm
Mass (approx.) 2.2 kg each
Design and specifications are subject to change without notice.
1-2 (No.MB211)
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.MB211)1-3
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.
1-4 (No.MB211)
1.6 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.
1.6.1 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.
1.7 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.
1.8 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.
Card wire
Short round
Pickup
Card wire
CN601
Flexible board
Servo control board
(No.MB211)1-5
1.9 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)
1-6 (No.MB211)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB211)1-7
SECTION 3
r
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 3)
(1) From the back side of the main body, remove the six
screws A attaching the metal cover. (See Fig.1.)
(2) From the both sides of the main body, remove the two
screws B attaching the metal cover. (See Figs.2 and 3.)
(3) Remove the metal cover in the direction of the arrow while
extending the lower sections of the metal cover. (See
Figs.2 and 3.)
A
Metal cove
A
A
Fig.1
Metal cover
B
Fig.2
Metal cover
1-8 (No.MB211)
B
Fig.3
3.1.2 Removing the front panel assembly
(See Figs.4 to 6)
• Remove the metal cover.
(1) From the left side of the main body, disconnect the wire
from the connector CN104
(See Fig.4.)
Reference:
After connecting the wire to the connector CN104
wire with the spacer as before. (See Fig.4.)
(2) Disconnect the card wire from the connector CN700
micon board. (See Figs.4 and 5.)
Reference:
After connecting the card wire to the connector CN700
fix the card wire with the spacer as before. (See Fig.4.)
(3) From the top side of the main body, remove the screws C
attaching the front panel assembly. (See Fig.5.)
(4) From the bottom side of the main body, remove the two
screws D attaching the front panel assembly. (See Fig.6.)
(5) Release the two claws a and claw b from the both and bot-
tom sides of the front panel assembly, and remove the front
panel assembly in the direction of the arrow. (See Fig.6.)
Reference:
When attaching the front panel assembly, fit the micon board
to the notch c on the back side of the front panel assembly.
(See Fig.5.)
on the power supply board.
, fix the
on the
Front panel assembly
Card wire
Micon board
CN700
,
CN104
Power supply board
Wire
Spacer
Fig.4
Micon board
C
c
CN700
Card wire
Micon board
Front panel assembly
Fig.5
a
b
D
a
Front panel assembly
Fig.6
(No.MB211)1-9
3.1.3 Removing the rear panel
(See Fig.7)
• Remove the metal cover.
(1) From the back side of the main body, remove the five
screws E attaching the rear panel.
(2) Remove the screw F attaching the rear cover.
(3) Remove the rear panel from the chassis while extending
the sections d of the rear panel in the direction of the arrow.
Reference:
When removing the rear cover from the rear panel, remove the
screw F and two screws F’.
E
F'
Rear panel
E
F'
3.1.4 Removing the power supply board
(See Fig.8)
• Remove the metal cover.
(1) From the left side of the main body, remove the screw G
and screw H attaching the power supply board.
(2) Disconnect the connectors CN103
board toward this side.
(3) From the forward side of the power supply board, discon-
nect the wires from the connectors (CN100
).
CN104
Reference:
When attaching the screw G, attach the primary protector with
it.
3.1.5 Removing the tuner
(See Fig.8)
• Remove the metal cover.
(1) From the left side of the main body, disconnect the card
wire from the connector CN1
(2) From the back side of the main body, remove the two
screws J attaching the tuner.
Reference:
• After attaching the tuner, put the card wire on the section e
of the primary protector.
• When connecting the card wire to the connector CN1
card wire with the spacer as before.
on the power supply
to CN102,
on the tuner.
, fix the
J
CN101
CN100
d
CN1
Tuner
Wires
Spacer
F
Fig.7
Card wire
CN1
CN103
H
Fig.8
d
Rear cover
Power supply board
e
CN102
G
CN104
Wire
Primary protector
1-10 (No.MB211)
3.1.6 Removing the micon board
(See Figs.9 and 10)
• Remove the metal cover, front panel assembly and rear panel.
(1) From the top side of the main body, disconnect the card
wire from the connector CN766
Fig.9.)
Reference:
When connecting the card wire to the connector CN766
fix the card wire with the spacer as before.
(2) From the forward side of the micon board, disconnect the
wire from the connectors (CN750
board. (See Fig.9.)
Reference:
When reassembling, fix the wire with the wire holder after connecting the wire to the connector CN760
micon board as before. (See Fig.9.)
(3) From the right side of the main body, remove the three
screws K attaching the micon board. (See Fig.10.)
(4) Disconnect the connectors (CN761
board toward this side. (See Fig.10.)
(5) From the forward side of the micon board, disconnect the
card wire from the connectors CN765
on the micon board. (See
, CN760) on the micon
on the
, CN762) on the micon
. (See Fig.10.)
,
Micon board
CN766
Spacer
CN766
Card wire
CN750
Wire holder
Fig.9
K
Wires
CN760
Micon board
3.1.7 Removing the power amplifier board
(See Fig.11)
• Remove the metal cover, front panel assembly, rear panel,
power supply board and micon board.
(1) From the top side of the main body, remove the wire holder
and tie band fixing the wire 1.
(2) Remove the four screws L attaching the power amplifier
board.
Reference:
• When attaching the power amplifier board, align the sections
f of the main chassis in the slots of the power amplifier
board.
• After attaching the power amplifier board, pass the wire 1
through the section g of the power amplifier board.
• When reassembling, fix the wire 1 with the wire holder and
new tie band as before.
• When reassembling, pass the wire 2 through the section h
of the power amplifier board.
L
L
K
Wire 2
CN765
Card wire
g
Tie band
CN762
Fig.10
f
h
Wire holder
Fig.11
CN761
K
Power amplifier board
Wire 1
f
Main chassis
L
(No.MB211)1-11
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