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UX-V50V
UX-V50GN
SERVICE MANUAL
MICRO COMPONENT SYSTEM
No.20874
Oct. 2000
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
UX-V50V
UX-V50GN
UX-V50V
UX-V50GN
Contents
Safety precautions
Important for laser products
Disassembly method
Main adjustment
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
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1-4
1-14
1-18
1-19
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Area Suffix
This service manual is printed on 100% recycled paper.
UB
US
UT
UX
UF
Hong Kong
Singapore
Taiwan
Saudi Arabia
China
AUTO REVERSE
A U T O
T A PE
SELECT
OR
DOWN
UP
MULTI CONTROL
TAPE
FM/AM
CD
STANDBY
PHONES
AUX
REC
REV.
MODE
AHB
PRO
TIMER
CLOCK
VERTICAL DISC
LOADING MECHANISM
VOLUME
CD
OPEN/CLOSE
REMOTE CONTROL RM-SUXV50E
CANCEL
TREBLE
FM/AM
FM
MODE
DISPLAY
SLEEP
AUX
TAPE
CD
CD
BASS
AHB
PRO
RANDOM
AUTO
PRESET
REPEAT
SELECT
SET
PROGRAM
VOLUME
T APE
MICRO COMPONENT SYSTEM
UX-V50V
VIDEO CD VERSION 2.0
VIDEO CD VERSION 2.0
SELECT
PREV
RETURN
NEXT
VCD
NUMBER
VOCAL
MASKING
ON
SCREEN
ECHO
V. INTRO
VCD NUMBER
UP
VCD NUMBER
DOWN
PREV
NEXT
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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 manufacturer`s
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 re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling 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, 1,000 ohms
per volt or more sensitivity in the following manner. Connect a 1,500
10W resistor paralleled by
a 0.15 F 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 eachexposed metal
part, particularly any exposed metal part having a
return path to the chassis, and meausre 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.).
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.
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
! 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.
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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
laserradiation and is equipped with safety switches
whichprevent 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.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO
: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
! CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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Pull out the MIC level knob on the back of the body.
Remove the seven screws A attaching the rear cover
on the back of the body.
Remove the two screws B attaching the rear cover
on the bottom of the body.
Unlock the speaker terminal and the antenna
terminal, then remove the rear cover backward with
releasing the hooks.
1.
2.
3.
4.
Disassembly method
<Main body>
Removing the rear cover
(See Fig.1 to 3)
Prior to performing the following procedure, remove
the rear cover.
Move the side panels in the direction of the arrow
and remove them backward.
1.
Removing the side panels
(See Fig.4 and 5)
Fig.2
Fig.1
Fig.3
Fig.4
Fig.5
Rear cover
A
A
A
A
Rear cover
B
B
Side panel (L)
Side panel (R)
MIC level knob
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Prior to performing the following procedure, remove
the rear cover and the side panels.
Disconnect the card wires from connector CN304
and CN305 on the main board on the left side of the
body.
Disconnect the wire from connector CN504 on the
tuner & function board on the right side of the body.
Remove the two screws C attaching the cassette
mechanism assembly on both sides of the body and
release the two joints a.
Remove the cassette mechanism assembly in the
direction of the arrow.
1.
2.
3.
4.
Removing
the
cassette
mechanism
assembly (See Fig.6 and 7)
Prior to performing the following procedure, remove
the rear cover, the side panels and the cassette
mechanism assembly.
Disconnect the card wire from connector CN303 and
the wire from CN306 and CN307 on the main board
respectively.
Disconnect the wire from connector CN902 on the
power transformer.
Remove the screw D attaching the main board on
the right side of the body.
Remove the screw E and the two screws F attaching
the heat sink on the back of the body.
1.
2.
3.
4.
Disconnect connector CN301 and CN302 on the
main board from the main body. Remove the main
board upward by releasing the two joints b in the
lower part of the main board.
5.
Removing the main board / the heat sink
(See Fig.8 to 10)
The heat sink can be removed even if
the main board is attached to the body.
ATTENTION:
Fig.6
Fig.7
Fig.8
Fig.9
C
C
CN304
CN305
Joint
a
Main board
Cassette mechanism assembly
Cassette mechanism assembly
Joint
a
CN303
CN307
CN306
Transformer board
CN902
Main board
Heat sink
Joint
b
Main board
CN302
CN301
Joint
b
D
Tuner & function board
CN504