JVC UX-H9 Manuale utente
SERVICE MANUAL
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB107
2004/1
MICRO COMPONENT SYSTEM
MB10720041
UX-H9
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
TIMER SET
RANDOM SLEEP
INTRO
/
RDS SEARCH
STANDBY/ON
TIMER
ON/OFF
REMAIN
/RDS MODE
BEAT CUT
DISPLAY
/CLOCK SET
MUTING
RM-SUXH9R REMOTE CONTROL
SOUND
/BASS
CD
TAPE CD
VOLUME
TUNER
/BAND
REPEAT
ST/MONOPROGRAM
STANDBY/ON
STANDBY
OPEN
VOLUME
MICRO COMPONENT SYSTEM
UX-H9
CD SYNCHRO RECORDING
Area Suffix
E ------ Continental Europe
EN ------ Noerthern Europe
1-2 (No.MB107)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier Section
CA-UXH9
Output Power (IEC 268-3) 10 W (5 W + 5 W) at 4 Ω(10% THD)
Speakers/Impedance 4 Ω- 16 Ω
Tuner FM tuning range 87.50 MHz-108.00 MHz
AM (MW) tuning range 522 kHz-1 629 kHz
CD player Dynamic range 60 dB
Signal-to-noise ratio 60 dB
Wow and flutter Immeasurable
Cassette deck Frequency response Normal (type I):100 Hz-10 000 Hz
Wow and flutter 0.35 % (WRMS)
General Power requirement AC 230 V , 50 Hz
Power consumption 22 W (at operation)
3.0 W (on standby)
Dimensions (W/H/D) (approx.) 145 mm ×209 mm ×226 mm
Mass (approx.) 2.8 kg
Speaker Section
SP-UXH9
Type Full range Bass-reflex type
Speakers 10 cm cone ×1
Power handling capacity 5 W
Impedance 4 Ω
Frequency range 100 Hz to 15 kHz
Dimensions (W/H/D) (approx.) 135 mm ×209 mm ×152 mm
Mass (approx.) 1.3 kg each
(No.MB107)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 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)
0.15 F AC TYPE
1-4 (No.MB107)
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.MB107)1-5
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 CD players.
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 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 CD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector on the CD servo board. (If the
flexible wire is disconnected without applying solder, the CD 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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
1-6 (No.MB107)
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 compact disc 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 de
feated. 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 herein may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABEL and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
ADVARSEL: Usynlig laser-
strŒling ved Œbning, nŒr
sikkerhedsafbrydere er ude
af funktion. UndgŒ uds¾t-
telse for strŒling (d)
VARNING: Osynlig laser-
strŒlning nŠr denna del Šr
šppnad och spŠrren Šr
urkopplad. Betrakta ej
strŒlen. (s)
CAUTION: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
VARO: Avattaessa ja suo-
jalukitus ohitettaessa olet
alttiina nŠkymŠttšmŠlle
lasersŠteilylle. lŠ katso
sŠteeseen. (f)
(No.MB107)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-8 (No.MB107)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the Front panel assembly
(See Fig.1 ~ 5)
(1) Remove the two screws Aand the two screws Bon the
back of the body.
(2) Remove the four screws Con each side of the body.
(3) Remove the two screws Don the bottom of the body.
(4) Move the front panel assembly in the direction of the arrow
and detach. Disconnect the wire from connector CN860
and FM-ANT.
Caution:
When reassembling, set the tab “a” on the right and left side to
the groove, and move.
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
A
B
CD mechanism assembly
C
Front panel assembly
DFront panel assembl
y
Joint a
Joint a
Front panel
assembly
CD mechanism assembl
y
FM-ANT
CN860
(No.MB107)1-9
3.1.2 Removing the Main board
(See Fig.6 , 7)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Disconnect the wire from all connectors on the main board.
(2) Remove the two screws Eand release the joint b.
Fig.6
Fig.7
CN801
CN851
CN850
CN370
CN301
CN601CN602 CN260
Main board
CD mechanism
assembly
Front panel
assembly
E
Main board
CD mechanism
assembly
Front panel assembly
Joint b
1-10 (No.MB107)
3.1.3 Removing the CD mechanism assembly and the Switch board
(See Fig.8 ~ 10)
• Prior to performing the following procedure, remove the front
panel assembly and the main board.
(1) Cut off the four bands setting the wires.
(2) Disconnect the wire from connector on the CD open switch
and CN705 on the CD mechanism board.
(3) Remove the two screws Fon the front panel assembly.
(4) Release the joint dof the CD mechanism assembly.
(5) Remove the five screws Gattaching the switch board to the
CD mechanism assembly.
Fig.8
Fig.9
Fig.10
Band
F
F
Band
CN705
Open switch
connecter
CD mechanism
assembly
Front panel
assembly
Joint d
CD mechanism
assembly
Front panel assembly
G
GSwitch board
CD mechanism
assembly
Front panel
assembly
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