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L56
DVD/VIDEO CD/CD
SERVICE MANUAL
PLAYER
PLAYER
DVD/VIDEO CD/CD
L56
1-2
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.
ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE
WITHOUT MANUFACTURER'S APPROVAL. UNAUTHORIZED EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL
MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING A.C. VOLTMETER
PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU
ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING
SAFETY CHECKS AND SERVICING GUIDELINES. TO DO
0.15uF
OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS
AND INJURY TO THE USER. GOOD EARTH GROUND PLACE THIS PROBE
SUCH AS THE WATER ON EACH EXPOSED
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR 10 WATT
PIPE. CONDUIT. ETC METAL PART
PROTECTION FROM A.C. LINE SHOCK. 1500 OHM
SAFETY CHECKS SUBJECT : GRAPHIC SYMBOLS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN
CORRECTED. A CHECK SHOULD BE MADE OF THE EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE
FOLLOWING. PRESENCE OF UNINSULATED "DANGEROUS VOLTAGE" WITHIN THE
PRODUCT'S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO
SUBJECT : FIRE & SHOCK HAZARD CONSTITUTE A RISK OF ELECTRIC SHOCK.
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS
SUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE
COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT LITERATURE ACCOMPANYING THE APPLIANCE.
ON THOSE MODULES WHICH ARE TRANSPORTED TO AND
FROM THE REPAIR SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE SUBJECT : TIPS ON PROPER INSTALLATION
DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,
SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER
OTHER HARDWARE HAVE BEEN REINSTALLED PER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED
ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE AIR FLOW.
OF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A
COLD SOLDER JOINTS, SOLDER SPLASHES OR SHARP FACTOR, NEAR STEAM RADIATORS WHERE STEAM
SOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSE LEAKAGE IS A FACTOR, ETC.
FOREIGN PARTICLES. 3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE
DETERIORATION TO PARTS AND COMPONENTS. FOR USE OF DECORATIVE SCARVES OR OTHER COVERINGS
FRAYED LEADS, DAMAGED INSULATION (INCLUDING A.C. WHICH MIGHT OBSTRUCT VENTILATION.
CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A
LAYOUT, LEAD LENGTH AND DRESS. COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING APPROVED MOUNTING INSTRUCTIONS A PRODUCT
TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS
TENSION AROUND PROTRUDING METAL SURFACES MUST ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN
BE AVOIDED. SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS
6. ALL CRITICAL COMPONENTS SUCH AS FUSES, THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS
FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM
REPLACED WITH EXACT FACTORY TYPES, DO NOT USE LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.
REPLACEMENT COMPONENTS OTHER THAN THOSE 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A
SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT PRODUCT ON SLOPING SHELF OR A TILTED POSITION,
MODIFICATIONS. UNLESS THE PRODUCT IS PROPERLY SECURED.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE
A.C.LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF ON ITS MOUNTING TO THE CART. CAUTION THE
THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART
TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP
IS SAFETY TO OPERATE WITHOUT DANGER OF PILE CARPETS.
ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR
TRANSFORMER DURING THIS TEST USE AN A.C. STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS
VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC
SENSITIVITY, IN THE FOLLOWING MANNER; CONNECT A MODEL OF TELEVISION RECEIVER OR GENERICALLY
1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD, APPROVED FOR USE WITH T.V.'S OF THE SAME OR
150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD LARGER SCREEN SIZE.
EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION
EXPOSED METALLIC PARTS, ONE AT A TIME. CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS
MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION SPROUTING FROM A SINGLE OUTLET CAN LEAD TO
OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE
MEASUREMENTS FOR EACH EXPOSED METALLIC PART. 1-3
SERVICING PRECAUTIONS
CAUTION : Before servicing the DVD player covered by this service Electrostatically Sensitive (ES) Devices
data and its supplements and addends, read and follow the SAFETY Some semiconductor (solid state) devices can be damaged easily by
PRECAUTIONS. NOTE : if unforeseen circumstances create conflict static electricity. Such components commonly are called
between the following servicing precautions and any of the safety Electrostatically Sensitive (ES) Devices. Examples of typical Es
precautions in this publication, always follow the safety precautions. devices are integrated circuits and some field effect transistors and
Remember Safety First: semiconductor chip components.
The following techniques should be used to help reduce the
General Servicing Precautions incidence of component damage caused by static electricity.
1. Always unplug the DVD player's AC power cord from the AC
power source before: 1. Immediately before handling any semiconductor component or
(1) Removing or reinstalling any component, circuit board, semiconductor-equipped assembly, drain off any electrostatic
module, or any other assembly. charge on your body by touching a known earth ground.
(2) Disconnecting or reconnecting any internal electrical plug or Alternatively, obtain and wear a commercially available
other electrical connection. discharging wrist strap device, which should be removed for
(3) Connecting a test substitute in parallel with an electrolytic potential shock reasons prior to applying power to the unit under
capacitor. test.
Caution : A wrong part substitution or incorrect polarity installation
of electrolytic capacitors may result in an explosion hazard. 2. After removing an electrical assembly equipped with ES devices,
place the assembly on a conductive surface such as aluminum
2. Do not spray chemicals on or near this DVD player or any of its foil, to prevent electrostatic charge buildup or exposure of the
assemblies. assembly.
3. Unless specified otherwise in this service data, clean electrical 3. Use only a grounded-tip soldering iron to solder or unsolder ES
contacts by applying an appropriate contact cleaning solution to devices.
the contacts with a pipe cleaner, cottontipped swab, or
comparable soft applicator. 4. Use only an antistatic solder removal device. Some solder
Unless specified otherwise in this service data, lubrication of removal devices not classified a "anti-static" can generate
contacts is not required. electrical charges sufficient to damage ES devices.
4. Do not defeat any plug/socket B+ voltage interlocks with which 5. Do not use freonpropelled chemicals. These can generate
instruments covered by this service manual might be equipped. electrical charge sufficient to damage ES devices.
5. Do not apply AC power to this DVD player and/or any of its 6. Do not remove a replacement ES device from its protective
electrical assemblies unless all solid-state device heat sinks are package until immediately before you are ready to install it. (Most
correctly installed. replacement ES devices are packaged with leads electrically
shorted together by conductive foam, aluminum foil, or
6. Always connect test instrument ground lead to the appropriate comparable conductive material).
ground before connecting the test instrument positive lead. Always
remove the test instrument ground lead last. 7. lmmediately before removing the protective material from the
leads of a replacement ES device, touch the protective material to
Insulation Checking Procedure the chassis or circuit assembly into which the device will be
Disconnect the attachment plug from the AC outlet and turn the installed.
power on. Connect an insulation resistance meter(500V) to the
blades of the attachment plug. The insulation resistance between Caution : Be sure no power is applied to the chassis or circuit, and
each blade of the attachment plug and accessible conductive parts observe all other safety precautions.
(Note 1) should be more than 1M-ohm.
Note 1 : Accessible Conductive Parts including Metal panels, Input 8. Minimize bodily motions when handing unpackaged replacement
terminals, Earphone jacks, etc. ES devices. (Normally harmless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a
carpeted floor can generate static electricity sufficient to damage
an ES device.)
1-4
DVD player/Outputs/Supplied Accessories
Power supply AC 230V / 50 Hz (EUROPE), AC 110V/60Hz (USA / CANADA)
Power consumption 15 W
Mass 3.3 kg
External dimensions (W X H X D) 285 x 103x 291 mm
Signal system PAL (EUR) , NTSC (USA / CANADA)
[DVD player]
Laser Semiconductor laser, wavelength 650 nm
Frequency range (audio) 4 Hz to 20 kHz
Signal-to-noise ratio (audio) More than 100 dB (EIAJ)
Dynamic range (audio) More than 95 dB (EIAJ)
Harmonic distortion (audio) 0.008 %
Wow and flutter Below measurable level (less than + 0.001 % (W.PEAK)) (EIAJ)
Operating conditions Temperature: 41