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SERVICE MANUAL
No.20848
XV-521BK/523GD/522SL
XV-521BK/523GD/522SL
Contents
Safety precautions
Importance administering
point on the safety
Disassembly method
Main Adjustment
Troubleshooting
Precautions for service
Description of major ICs
1-2
1-3
1-4
1-14
1-21
1-22
1-23
VICTOR COMPANY OF JAPAN, LIMITED
OPTICAL DISC BUSINESS DIV. PERSONAL & MOBILE NETWORK BUSINESS UNIT
AV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan
DVD PLAYER
No.20848
Jul. 2000
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
Printed in Japan
200007 (S)
XV-521BK/523GD/522SL
B
EN
EG
ES
EE
U.K.
Northern Europe
Germany, France, Greece,
Netherlands, Switzerland
Spain, Italy
Russian Federation
Area Suffix
XV-521BK
B
EN
EG
ES
U.K.
Northern Europe
Germany, France, Greece,
Netherlands, Switzerland
Spain, Italy
Area Suffix
XV-523GD/522SL


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XV-521BK/523GD/522SL
1-2
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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XV-521BK/523GD/522SL
1-3
Dismantling and assembling the traverse unit
1. Notice regarding replacement of optical pickup
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 to the optical pickup or connected devices.
(Refer to the section regarding anti-static measures.)
1. Do not touch the area around the laser diode and actuator.
2. Do not check the laser diode using a tester, as the diode may easily be destroyed.
3. It is recommended that you use a grounded soldering iron when shorting or removing the laser diode.
Recommended soldering iron: HAKKO ESD-compatible product
4. Solder the land on the optical pickup's flexible cable.
Note : Short the land after shorting the terminal on the flexible cable using a clip, etc., when using an
ungrounded soldering iron.
Note : After shorting the laser diode according to the procedure above, remove the solder according
to the text explanation.
Shorting
Shot with the clip


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XV-521BK/523GD/522SL
1-4
Remove the four screws A on both side of the body.
Remove the two screws B on the back of the body.
Lift up the rear part of the top cover while pulling the
lower part of the sides, then detach upward.
1.
2.
3.
Disassembly method
< Main body>
Removing the top cover (See Fig.1)
Prior to performing the following procedure, remove
the top cover.
Remove the seven screws C
on the back of the
body.
1.
Removing the rear panel (See Fig.2)
Fig.1
Fig.2
Top cover
Rear panel
B
C
C
A 2
A 2
C
C


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XV-521BK/523GD/522SL
1-5
Prior to performing the following procedure, remove
the top cover.
by hand
Turn over the body. Insert a screwdriver into the hole
of the bottom chassis and turnit. The loading tray will
be ejected out of the front panel assembly.
Pull the loading tray toward the front.
Remove the fitting upward from the loading tray at
the joints b.
Push and return the loading tray.
1.
2.
3.
4.
Removing the fitting (See Fig.3 to 6)
To remove the front panel assembly
and the DVD mechanism assembly,
remove the fitting in advance.
ATTENTION:
Front panel
Front panel assembly
Loading tray
Hole
Bottom chassis
(Bottom)
Fig.3
Fig.4
Fig.5
Fig.6
Front panel assembly
Fitting
Joint b
Joint b
Loading tray
Loading tray
Front panel assembly
DVD mechanism assembly
TRAYOPEN