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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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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3. Insert the Flat Cableinto the Flat CableHolder
4. Insert the Flat CableHolder to the DD Cylinder Unit.
5. The "COMPATIBILITY ADJUSTMENT" shouldbe performed after
the replacement of the DD Cylinder Unit.
NOTE:
Incase that you have inserted the Flat CableHolder
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(FPCHolder) to the DD Cylinder Unitbefore inserting the Flat Cable
(Flexiblecard) into the Flat CableHolder. Pushing stopper portion
of the Flat CableHolder with asmall minus screw driver, remove
the Flat CableHolder whilepaying attention for not to scratch the
DD Cylinder and not to break the Head Chipas shownbelow.
6.2.4. FLATCARD CABLE INSTALLATION
Wheninstalling the Flat CardCable on the connector, install the Flat CardCable withthe cable
contacts facing the connectorcontacts.
6.3. REMOVALOFCASSETTE TAPE
Whenthe cassette tape couldnot be uninstalledfromanelectrical malfunction, there are two
ways toremove a cassette tape.
1. Removal bycompulsoryunloading.
A. Press FF and EJECTbutton simultaneouslyfor more than 3
seconds and set the Service Mode to 7.
B. Press STOPbutton inorder to unload the mechanism.
(Payattention to tape slack)
Service Mode Indication:
70L 00 (STOP) 70L A2(EJECT)
2. Removal bymanual operation byrotating the Loading Motor with
the batteries.
A. Disconnect the AC plug, and remove the Top Panel and the
Front Panel byreferring to the DisassemblyProcedures.
B. Connect one batterie(9V spec.)to the Loading Motor inseries
for supplying 9V to rotate the Loading Motor.
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C. Stop unloading just before unloading wouldbe completed.
D. Then the tape becomes slack.
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E. Rotate the S-Reel byasmall minus screwdriver to remove the
slack tape.
F. Then unload againto remove the cassette tape.
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3. Removal bymanual operations after uninstalling the mechanism.
A. Disconnect the AC plug remove the Top Panel, Front Panel and
the Mechanism byreferring to the DisassemblyProcedures.
B. Remove the Screw (S1) and remove the Loading Motor both.
C. Rotate the MainCam Gear counter-clockwise until just before
the unloading wouldbe completed.
D. Rotate the Capstan Motor clockwise to remove the slack tape.
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E. Rotate the MainCam Gear counter-clockwise againto remove
the cassette-tape.
F. Set the Position Switch to EJECTPOSITIONcertainly.
G. Install the Loading Motor and tighten screw (S1).
6.4. SELF-DIAGNOSIS&SERVICEINFORMATIONDISPLAY
Refertothe Service Manual forR4 MechanismChassis forEURO model (MAD0403002C2).
6.5. INTRODUCTIONOFVIDEO / HEAD CLEANING CASSETTE /
(POLISHING TYPE)
1. We are pleased to introduce PanasonicVideo Head Cleaning
Cassette, VFK0923FT [for service purposes] and VFK0923FSE [
for end users] for all VHS/SVHSVCPand VCR.
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2. These cleaning cassettes are exclusive removing the hard and
stickyclogging on video heads.
3. These improve the efficiencyof video head cleaning service and
shortening cleaning time for end users.
VFK0923FT
(ForService usage)
Type of Cassette Full VHS Cassette
Cleaning Time 10 Seconds/Time
Tape Length 20 m
Usabilityina Path 180 Times
VFK0823FSE
(Forend users)
Type of Cassette Full VHS Cassette
Cleaning Time 10 Seconds/Time
Tape Length 3.34 m
Usabilityina Path 30 Times
Note:
The tape material itselfisthe same inboth types.
7. DISASSEMBLING THE CASING AND CHECKING
PCBs
7.1. DISASSEMBLY PROCEDURE
7.2. CASING PARTS AND PCB POSITIONS
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7.3. TOPPANEL
1. Unscrew the Screws.
7.4. FRONTPANEL UNIT
1. Unscrew the Screw.
2. Remove the Tabs.
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Note:
When attaching Front Panel, inorder to hook Cassette Door
Opener Lever to Cassette Door, push up cassette door inthe
direction of arrow and insert afront panel.
7.5. FRONTJACK PCB UNIT
1. Unscrew the Screws.
2. Remove the Tabs.
7.6. FRONTSWITCH PCB UNIT
1. Release the Screws.
2. Remove the Tabs.
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7.7. VIDEO MECHANISM UNIT
1. Unscrew the Screws.
2. Disconnect the Cylinder Connector (A).
3. Disconnect the A/CHead Connector (B).
4. Disconnect the Connector (C).
5. Disconnect the Loading Motor Connector (D).
6. Remove the VHSMechansimUnit.
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