JVC UX-S59 Manuale utente
SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB409
2005/6
MICRO COMPONENT SYSTEM
MB40920056
UX-S59
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Area suffix
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
EV ------------- Eastern Europe
1-2 (No.MB409)
SPECIFICATION
Designs & specifications are subject to change without notice
Amplifier section Output Power 120 W (60 W + 60 W) at 6 Ω(10% THD)
Speakers/Impedance 6 Ω- 16 Ω
Audio Input AUX 400 mV/50 kΩ
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range
Dynamic range
522 kHz - 1 629 kHz
CD player section 85 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
General Power requirement AC 230 V , 50 Hz
Power consumption 125 W (at operation)
0.9 W (on standby)
Dimensions (approx.) 175 mm ×232 mm ×412 mm (W/H/D)
Mass (approx.) 6.6 kg
Speakers Type 2-way Bass reflex
Speaker units Woofer 10 cm cone ×1
Tweeter 4 cm cone ×1
Impedance 6 Ω
Dimensions (approx.) 144 mm ×231 mm ×201 mm (W/H/D)
Mass (approx.) 2.0 kg each
(No.MB409)1-3
SECTION 1
PRECAUTIONS
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 from visual 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 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, 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-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.).
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 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
1-4 (No.MB409)
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. Replace-
ment 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.MB409)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB409)
SECTION 3
DISASSEMBLY
3.1 Disassembly of Right plate left plate Top cover
• Replacement of the fuses and AMP IC .THMS RES. Transistor. 7808 IC.
3.1.1 Replacing the fuses
(See Fig.1)
• Prior to performing the following procedure, remove right plate,
left plate, top cover.
(1) Replace the fuses inside.
Caution:
Be sure to use fuses with the specified
Fig.1
3.1.2 Replacing the AMP IC
(See Fig.2)
• Prior to performing the following procedure, remove the right
plate, left plate, top cover.
(1) Remove the two screws Afrom the heat sink between AMP
IC.
(2) Remove the solder fixing the AMP IC.
3.1.3 Replacing the THMS RES
(See Fig.2)
• Prior to performing the following procedure, remove right plate,
left plate, top cover.
(1) Remove the one screw Bfrom head sink.
(2) Remove the solder fixing THMS RES.
3.1.4 Replacing the transistor
(See Fig.2)
(1) Remove the one screw Cfrom head sink.
(2) Remove the solder fixing the Transistor.
Fig.2
3.1.5 Replacing the 7808 IC
(See Fig.3)
(1) Remove the one screw Dfrom head sink.
(2) Remove the solder fixing 7808 IC.
Fig.3
T1.25AL 250V
THMS RES
C
BAAMP IC
Transistor
D
7808 IC
(No.MB409)1-7
3.1.6 Removing the transformer cover
(See Fig.4)
(1) Remove the ten screws Efrom top cover.
(2) Take off transformer cover from rear plate.
Fig.4
3.1.7 Removing the right plate
(See Fig.5)
(1) Remove the two screws Ffrom right plate.
(2) Take off right plate from main body.
Fig.5
3.1.8 Removing the left plate
(See Fig.6)
(1) Remove the two screws Gfrom left plate.
(2) Take off left plate from main body.
Fig.6
SPEAKERS IMPEDANCE:6 16
E
E
EE
Transformae
r
cover
F
Right plate
G
Left plate
1-8 (No.MB409)
3.1.9 Removing the top cover
(See Fig.7 to 9)
(1) Remove the two screws H1 (See Fig.7,8).
(2) Disengage the claws H2 on both side of the front cabinet
(See Fig.7, 8).
(3) Rotate top cover and let's away from main body (See
Fig.9).
Caution:
When you rotate top cover, must to slow raise, Don't to destroy
the two claws of front cabinet.
Fig.7
Fig.8
Fig.9
H1 Top cover
H2
H1
Top cover H2
(No.MB409)1-9
3.1.10 Removing the main board
(See Fig.10 to 13)
(1) Remove the two screws J1. (See Fig.10)
(2) Disconnect the FFC cables J2 from the connector CN661
on main board. (See Fig.10)
(3) Disconnect the FFC cables J3 from the connector CN402
on main board. (See Fig.11)
(4) Disconnect the FFC cables J4 from the connector CN681
on main board. (See Fig.12)
(5) Remove main board from AMP board after disconnect the
connector J319 and CN601. (SeeFig.13)
Fig.10
Fig.11
Fig.12
Fig.13
J1 J1
J2
J3
J4
J4
1-10 (No.MB409)
3.1.11 Removing the power board
(See Fig.14 to 16)
(1) Remove the two screws K1 from CD mechanism cover and
power board. (See Fig.14)
(2) Disconnect the wire K2 from the connector CN102 on the
AMP board. (See Fig.15)
(3) Disconnect the two wire K3 from the connector CN901 and
CN902. (See Fig.16)
Fig.14
Fig.15
Fig.16
Power board
K1
K2
K3
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