Panasonic NV-VP23EG Manuale utente

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

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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4.1. ABOUTLEAD FREE SOLDER(PbF)

This model uses leadfree solder(PbF). Forrepairuse onlyleadfree handsolder.

Caution:

Pbfree solderhas a highermelting point thanstandardsolder; Typicallythe melting point is 50 -

70~F(30 - 40~C) higher. Please use a high temperature soldering iron. Incase of the soldering

iron withtemperature control, please set it to700 +/-20~F(370 +/-10~C). Pbfree solderwill tend

tosplashwhenheatedtoo high (about 1100~F/ 600~C). Whensoldering orunsoldering, please

completelyremove all of the solderon the pins orsolderarea and be sure toheat the soldering

points withthe Pbfree solderuntil it melts enough.

5. PREVENTION OF STATIC ELECTRICITY

DISCHARGE

The laserdiode inthe traverse unit (optical pickup) maybrake downdue tostatic electricityof

clothes orhumanbody. Use due caution toelectrostatic breakdownwhenservicing and

handling the laserdiode.

5.1. GROUNDING FORELECTROSTATICBREAKDOWN

PREVENTION

Some devices suchas the DVD playeruse the optical pickup (laserdiode) and the optical

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pickup will be damagedbystatic electricityinthe working environment. Proceedservicing

works underthe working environment where grounding works is completed.

5.1.1. WORKTABLE GROUNDING

1. Put aconductive material (sheet) or iron sheet on the area where

the optical pickup isplaced, and ground the sheet.

5.1.2. HUMAN BODY GROUNDING

1. Use the anti-staticwrist strap to discharge the staticelectricity

form your body.

5.1.3. HANDLING OFOPTICALPICKUP

1. To keep the good qualityof the optical pickup maintenance parts

during transportation and before installation, the both ends of the

laser diode are short-circuited. After replacing the parts with new

ones, remove the short circuitaccording to the correct procedure.

(See thisTechnical Guide.)

2. Donot use atester to check the laser diode for the optical pickup.

Failure to do so will damage the laser diode due to the power

supplyinthe tester.

6. GENERAL DESCRIPTION

6.1. OPERATING INSTRUCTIONS

6.2. SERVICECAUTION

6.2.1. REPLACING IC6002/EEPROM

Whenthe EEPROM: IC6002 is replaced, applicable model code, option code and electrical

adjustment data will not be available.

Therefore, enterand/oradjust the necessarydata afterreplacing IC6002 byreferring following

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procedure.

STEP1.REPLACE THE IC6002

1. Remove the PCB with Mechanism unitbyreferring the

Disassemblyprocedure.

2. Disconnect the AC plug and replace the IC6002.

STEP2.INPUTTHE MODEL& OPTION CODE

1. Set up the applicablemodel code and option code byordering the

following table.

PROCEDURE F.I.P. DISPLAY

Turnon the Service Mode

1.Press the FF keyand the

EJECTkeysimultaneouslyfor

more than3 seconds.

Activate the Service Mode 2

2.While keepplacing FF key,

press the EJECTkeyintwice.

Activate the Entering Mode.

3.Press the EJECTkeyfor

more than3 seconds.

Set the Mode 2.

4.Press the CH UP keyin

twice.

Displaythe Setting Code.

5.Press the POWER Button to

turnthe poweron.

(Colon starts

flashing)

Enterthe Model and Option Code.

6.Service Screenis displayedon the monitor.

7.Set the applicable Model and Option code by

using REW, PLAY, STOP and FF keys on the

Remote Controller. (See Fig.S1 & S2)

Exit fromService Mode.

8.Press the POWER Button to

turnthe poweroff.

9. Press FF and EJECTkeys

simultaneouslyin6 times.

(Normal Indication)

Fig. S1 Service ScreenSample forNV-VP23EP

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Fig. S2 Model Code & Option Code

NOTE:

Since all electrical adjustments data is still not available, perform the Electrical Adjustment

continuously.

6.2.2. CYLINDER UNITREPLACEMENT

NOTE:

Replacing onlyUpper Cylinder unitof R4Mechanism can not be

performed, as securing of RTgap isimpossibleout of factory,

please replace the cylinder bywholeCylinder Unit. The

CompatibilityAdjustment shouldbe performed after replacement of

the DD Cylinder Unit.

1. Remove the Mechanism Unitfrom MainPCB / Chassisreferring to

"DisassemblyProcedure".

2. Unlock 2locking tabs on aside to release the Cylinder Flat Cable

as shown.

CAUTION:

Handlethe Cylinder Flat Cablewith care. When itdamaged, you

shouldreplace wholeCylinder unit.

3. Remove the REDscrew and GOLDscrew to disassemblethe

Cylinder Unit.

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NOTE:

When reassembling, perform the steps inthe reverse order, and

perform the COMPATIBILITY ADJUSTMENTcertainlyafter

CYLINDERUNITREPLACEMENT.

6.2.3. ATTENTION FOR REPLAYING THE DD CYLINDER

1. Put the gloves on your hands.

2. Turn the DD Cylinder Unitover.

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