JVC UX-J66V Service Manual
MB059200311
S
S
SERVICE MANUAL
MICRO COMPONENT SYSTEM
UX-J66V
COMPACT
1 32
4 65
7 98
10 +10
BASS
PREV. NEXT
CD
/SELECT
CD
UP
DOWN
TAPE FM/A M AUX
REV.
MODE FM MODE
PRGMRETURN
DIGITAL VIDEO
STANDBY/ON
DISPLAY
CLOCK
/TIMER
SLEEP
TREBLE
CANCELSET
STILL
COLOR
REPEATRANDOM
P-UXJ66V
P-UXJ66VCA-UXJ66V
Area Suffix
US ---------------- Singapore
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.MB059
2003/12
SPECIFICATION
Amplifier Output Power 90 W (45 W + 45 W) at 6 Ω (10% THD)
MAIN SPEAKERS 30 W (15 W + 15 W) at 6 Ω (10% THD)
Audio input sensitivity/Impedance (at 1 kHz) AUX 400 mV/48 kΩ
Speakers/Impedance 6 Ω - 16 Ω
Tuner FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range AM 10 kHz intervals 530 kHz - 1 710 kHz
AM 9 kHz intervals 531 kHz - 1 710 kHz
CD player Dynamic range 85 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
Cassette deck Frequency response Normal (type I) 60 Hz - 14 000 Hz
Wow and flutter 0.15% (WRMS)
Speaker Speaker units Subwoofer 13.5 cm cone × 1
Woofer 8.0 cm cone × 1
Tweeter 4.0 cm cone × 1
Impedance Subwoofer 6 Ω
Main speaker 6 Ω
Dimensions (approx.) 175 mm × 320 mm × 241 mm (W/H/D)
Mass (approx.) 3.7 kg each
General Power requirement AC 110 V/ 127 V/ 220 V/ 230 V - 240 V,
adjustable with the voltage selector 50 Hz/ 60 Hz
Power consumption 1350 W (at operation)
3.4 W (on standby)
Dimensions (approx.) 520 mm × 320 mm × 323.3 mm (W/H/D)
Mass (approx.) 12.9 kg
Design and specifications are subject to change without notice.
1-2 (No.MB059)
1.1 Safety Precautions
Good earth ground
d
AC VOLTMETER
SECTION 1
PRECAUTION
(1) This design of th is product contains special hardw are 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.).
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal resp onsibility 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 compone nts 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 iden tified 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 expose
metal part.
(No.MB059)1-3
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 dio de) 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 sh eet) 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 optica l
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 CD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector CN601
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.
1-4 (No.MB059)
Flexible wire
Shorting round
Shorting round
CN601 on
mechanism
board
1.8 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.
!
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 LABEL and PRINT
WARNING LABEL and PRINT
Caution label
(No.MB059)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB059)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the metal cover
(See Fig.1~3)
(1) Pull out the MIC volume knob on top of the body.
(2) Remove the six screws A on the back of the main body.
(3) Remove the two screws B on each side an d remove the
metal cover in the direction of the arrow.
Volume knob
Metal cover
A
A
A
B
Fig.2
Fig.1
Fig.3
B
(No.MB059)1-7
3.1.2 Removing the rear cover
r
(See Fig.4)
(1) Remove the two screws D attaching the rear cover.
D
Rear cove
Fig.4
1-8 (No.MB059)
3.1.3 Removing the rear panel / fan assembly
(See Fig.5,6)
• Prior to performing the following procedure, remove the metal
cover and the rear cover.
(1) Remove the fourteen screws E attaching the rear panel.
Release the two joints a on the rear side and the two joints
b on each side.
(2) Remove the two screws F attaching the fan bracket and
release the two joints d on the rear panel, and remove.
(3) Disconnect the wire from the connector CN908
board.
Reference:
The MIC volume board comes off.
3.1.4 Removing the MIC volume board
(See Fig.6)
• Prior to performing the following procedure, remove the metal
cover, the rear cover and the rear panel.
(1) Remove the two screws G attaching the MIC volume board
on the inside of the rear panel.
(2) Disconnect the wire from connector CN906
board on the back of the body.
on the main
on the main
F
E
E
EE
a
Rear panel
E
F
d
d
Fan assembly
E
E
b
Fig.5
CN906
Main board
Mic volum board
CN908
G
b
Rear panel
Fig.6
(No.MB059)1-9
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