SERVICE MANUAL
DVD VIDEO PLAYER
No.A0015
July, 2001
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
XV-M52SL
XV-M50BK
XV-M52SL
XV-M50BK
This service manual is printed on 100% recycled paper.
Contents
Safety precautions ------------------------ 1-2
Preventing static electricity ------------- 1-3
Precautions for Service ------------------ 1-4
Disassembly method -------------------- 1-5
Adjustment method ----------------------- 1-20
Description of major ICs ---------------- 1-24
DISC
SELECT
TV
DVD
PLAY
MODE
123
56
89
0
+10
10
7
4
3D
PHONIC
TV/VIDEO
CANCEL
SUBTITLE
ANGLE
TV1
TV2
TV3
TV4
TV5
TV6
TV7
TV8
TV9
TV -/--
TV0
MUTING
AUDIO
THEATER
POSITION
DIGEST
PREVIO
US
NEXT
CLEAR
STROBE
SLOW+
SLOW
TIT
LE
MEN
U
CHO
ICE
ENTER
RM-SXVM50J REMOTE CONTROL
CH+
SELECT
CH-
VOL
+
VOL
-
DIS
PL
AY
ZOOM
RETURN
TV
DVD
STANDBY/ON
DISC TITLE CHAP
RESUME THEATER
DVD
EACH
STANDBY
STANDBY/ON
PAUSE
PLAY
STOP
SKIP
DISC 3
DISC 2
DISC 1
DISC
3
DISC
2
DISC
1
3
2
1
DOLBY
D I G I T A L
PLAY & EXCHANGE
DVD / VIDEO CD / CD
10-bit/27MHz VIDEO D/A CONVERTER
XV-M50
DVD/CD PLAYER
Area Suffix
UJ ----------- U.S.military
[XV-M50BK]
Area Suffix
B ------------------------ U.K.
EN ----- Northern Europe
UN ------------------- Asean
US -------------- Singapore
UW -- Brazil,Mexico,Peru
[XV-M52SL]
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. (Except the JC version)
Model
XV-M50BK
XV-M52SL
Body color
Black
Silver
Each difference point
XV-M52SL/XV-M50BK
1-2
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.).
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
!
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.
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.
(Except the J and C version)
XV-M52SL/XV-M50BK
1-3
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.
1.1. Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
1.1.1. Ground the workbench
1. 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.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
1.1.3. Handling the optical pickup
1. 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 next page.)
2. 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.
1.2. 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. For specific details, refer to the replacement procedure in the text. 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. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
XV-M52SL/XV-M50BK
1-4
Precautions for Service
Handling of Traverse Unit and Laser Pickup
1. Do not touch any peripheral element of the pickup or the actuator.
2. The traverse unit and the pickup are precision devices and therefore must not be subjected to
strong shock.
3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the
internal power supply of the tester.)
4. When replacing the pickup, after mounting a new pickup, remove the solder on the short land
which is provided at the center of the flexible wire to open the circuit.
5. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the
characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body. Before repairing peripheral elements of the traverse
unit or pickup, be sure to take the following electrostatic protection:
1. Wear an antistatic wrist wrap.
2. With a conductive sheet or a steel plate on the workbench on which
the traverse unit or the pick up is to be repaired, ground the sheet
or the plate.
When you remove the traverse mechanism from the servo control substrate
The laser diode of pick-up might be destroyed by static electricity and set switch (S11) on the pick-up board
on "SHORT" side, please before removing the card wire from connector (CN10).
Moreover, please set switch (S11) on "OPEN" side after assembling and inserting the card wire in
connector (CN10) without fail at times.
When you remove the pick-up from the traverse mechanism
The laser diode of the pick-up might be destroyed by static electricity, and solder with part a, please before
extracting a flexible wire from connector (CN12).
Moreover, please remove solder in part a after inserting a flexible wire in connector (CN12).
CN12
CN10
OPEN
SHORT
SWITCH S11
Soldering part
Traverse
mechanism
Traverse
mechanism
Pick-up
XV-M52SL/XV-M50BK
1-5
Remove the two screws A attaching the top cover
on the back of the body.
Remove the four screws B attaching the top cover
on both sides of the body.
Pull the lower parts of the top cover sides and
remove the top cover in the direction of the arrow.
1.
2.
3.
Disassembly method
Removing the top cover (See Fig.1)
<Main body>
Prior to performing the following procedure, remove
the top cover.
Disconnect the wire from connector CN971 on the
power supply board.
Disconnect the card wire from connector CN703 on
the system control board.
Remove the three screws C
attaching the front
panel assembly on the bottom of the body.
Release the joint a on the bottom and the two joints
b on both sides of the body. Remove the front panel
assembly toward the front.
1.
2.
3.
4.
Removing the front panel assembly
(See Fig.2 to 5)
Fig.1
Fig.2
Fig.3
Fig.5
Fig.4
Top cover
B 2
B 2
A
Front panel assembly
CN971
CN703
Power supply board
System control board
C
C
C
Joint a
Front panel assembly
Joint b
Front panel assembly
Joint b