Panasonic NV-VP23EG User manual

ORDERNO.MAD0503001CE
DVDPlayer / Video Cassette Recorder
NV-VP23EG / NV-VP23EC / NV-VP23EP / NV-VP28EG / NV-
VP28EC / NV-VP33EG / NV-VP33EC / NV-VP33EB / NV-
VP33EBL / NV-VP33EP /
R4-MECHANISM
Colour
(K).......................Black Type
(S).......................Silver Type
SPECIFICATIONS
2005 Matsushita ElectricIndustrial CO., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
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1. INTRODUCTION
This service manual contains technical information whichwill allowservice personnel to
understand and service this model.
If the circuit is changedormodified, this information will be followedbysupplementaryservice
manual tobe filedwithoriginal service manual.
Note:
Adjustment procedures, DisassemblyProcedures and AssemblyProcedures forVCR
MechanismChassis are separate volume fromthis service manual. Please refertothe service
manual forR4 MechanismChassis forEURO model (MAD0403002C2).
Model No. Indication Mark
NV-VP23EG 23EG
NV-VP23EC 23EC
NV-VP23EP 23EP
NV-VP28EG 28EG
NV-VP28EC 28EC
NV-VP33EG 33EG
NV-VP33EC 33EC
NV-VP33EB 33EB
NV-VP33EBL 33EBL
NV-VP33EP 33EP
2. SAFETY PRECAUTIONS
2.1. GENERALGUIDELINES
1. Becareful during removing metal parts, sharp edges.
2. When servicing, observe the original lead dress. Ifashort circuit
isfound, replace all parts which have been overheated or
damaged bythe short circuit.
3. After servicing, see to itthat all the protective devices such as
insulation barriers, insulation papers shields are properly
installed.
4. After servicing, make the following leakage current checks to
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prevent the customer from being exposed to shock hazards.
2.1.1. LEAKAGE CURRENTCOLD CHECK
1. Unplug the AC cord and connect ajumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the
jumpered AC plug and each exposed metalliccabinet part on the
equipment such as screwheads, connectors, control shafts, etc.
When the exposed metallicpart has areturn path to the chassis,
the reading shouldbe between 1M and 5.2M .
When the exposed metal does not have areturn path to the
chassis, the reading must be infinity.
Figure 1
2.1.2. LEAKAGE CURRENTHOTCHECK (See Figure 1)
1. Plug the AC cord directlyinto the AC outlet. Donot use an
isolation transformer for thischeck.
2. Connect a1.5k , 10 watts resistor, inparallel with a0.15 F
capacitor, between each exposed metallicpart on the set and a
good earth ground such as awater pipe, as shownin Figure 1.
3. Use an AC voltmeter, with 1000 ohms/voltor more sensitivity, to
measure the potential across the resistor.
4. Check each exposed metallicpart, and measure the voltage at
each point.
5. Reverse the AC plug inthe AC outlet and repeat each of the above
measurements.
6. The potential at anypoint shouldnot exceed 0.75 volts RMS. A
leakage current tester (Simpson Model 229 or equivalent) maybe
used to make the hot checks, leakage current must not exceed 1/2
milliamp. Incase ameasurement isoutside of the limits specified,
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there isapossibilityof ashock hazard, and the equipment should
be repaired and rechecked before itisreturned to the customer.
3. PREVENTION OF ELECTRO STATIC DISCHARGE
(ESD) TO ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
Some semiconductor(solidstate) devices canbe damagedeasilybystatic electricity. Such
components commonlyare calledElectrostaticallySensitive (ES) Devices. Examples of typical
ES devices are integratedcircuits and some field-effect transistors and semiconductor"chip"
components. The following techniques shouldbe usedtohelpreduce the incidence of
component damage causedbyelectrostatic discharge (ESD).
1. Immediatelybefore handling anysemiconductor component or
semiconductor-equipped assembly, drainoff anyESDon your
bodybytouching aknownearth ground. Alternatively, obtainand
wear acommerciallyavailabledischarging ESDwrist strap, which
shouldbe removed for potential shock reasons prior to applying
power to the unitunder test.
2. After removing an electrical assemblyequipped with ES devices,
place the assemblyon aconductive surface such as alminum foil,
to prevent electrostaticcharge buildup or exposure of the
assembly.
3. Use onlyagrounded-tipsoldering iron to solder or unsolder ES
devices.
4. Use onlyan anti-staticsolder removal device. Some solder
removal devices not classified as "anti-static(ESDprotected)"
can generate electrical charge sufficient to damage ES devices.
5. Donot use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Donot remove areplacement ES device from its protective
package until immediatelybefore you are readyto install it. (Most
replacement ES devices are packaged with leads electrically
shorted together byconductive foam, aluminium foil or
comparableconductive material).
7. Immediatelybefore removing the protective material from the
leads of areplacement ES device, touch the protective material to
the chassisor circuitassemblyinto which the device will be
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installed.
Caution
Besure no power isapplied to the chassisor circuit, and observe
all other safetyprecautions.
8. Minimize bodilymotions when handling unpackaged replacement
ES devices. (Otherwise harmless motion such as the brushing
together of your clothes fabricor the lifting of your foot from a
carpeted floor can generate staticelectricity(ESD)sufficient to
damage an ES device).
4. PRECAUTION OF LASER DIODE
CAUTION: ACHTUNG:
This product utilizes a laserdiode withthe unit
turned“on”,
invisible laserradiation is emittedfromthe pickup
lens.
Wave length: 662 nm/785 nm
Maximumoutput radiation powerfrompickup: 100
W/VDE.
Laserradiation fromthe pickup lens is on a safety
level, if following precautions are followed:
Dieses Produkt enthält eine Laserdiode.
ImeingeschaltetenZustand wird
unsichtbare
Laserstrahlung von der
Lasereinheit ausgestrahlt.
Wellenlänge: 662 nm/785 nm
Maximale Strahlungsleistung der
Lasereinheit
/VDE.
Die Strahlung dereingeschalteten
Lasereinheit
ungefährlich, wenn
folgende Punkte beachtet werden:
1.Donot disassemble the optical pickup unit,
since radiation
fromexposedlaserdiode is dangerous.
1.Die Lasereinheit nicht zerlegen, da die
Strahlung
derfreigelegten
Laserdiode gefährlichist.
2.Donot adjust the variable resistoron the
pickup unit.
It was alreadyadjusted.
2.DenwerksseitigjustiertenEinstellregler
der
Lasereinheit nicht
verstellen.
3.Recommend not tolook at pickup lens. 3.Nicht indie Fokussierlinse blicken.
4.Donot look at the focus lens using optical
instruments. 4.Auchnicht mit optischenInstrumentenin
die
Fokussierlinse blicken.
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