Panasonic PalmSight PV-L750 Bedienungsanleitung

ORDERNO. MKE0001201C1

B15 (U.S.A.), B4(CANADA, PUERTO RICO)

Compact VHSCamcorder

PV-L750 / PV-L780 / PV-L850

SPECIFICATIONS

2000 Matsushita-Kotobuki Electronics Industries LTD. All rights

reserved. Unauthorized copying and distribution isaviolation of

law.

1. SAFETY PRECAUTIONS

GENERALGUIDELINES

1. IMPORTANTSAFETY NOTICE

There are special components used inthisequipment which are

important for safety. These parts are marked by inthe Schematic

Diagrams, CircuitBoard Layout, Exploded Viewsand

Replacement Parts List. Itisessential that these critical parts

shouldbe replaced with manufacturer's specified parts to prevent

X-RADIATION, shock, fire, or other hazards. Donot modifythe

original design without permission of manufacturer.

2. AnIsolation Transformer shouldalwaysbe used during the

servicing of AC Adaptor whose chassisisnot isolated from the

AC power line. Use atransformer of adequate power rating as this

protects the technician from accidents resulting inpersonal injury

from electrical shocks. Itwill also protect AC Adaptor from being

damaged byaccidental shorting that mayoccur during servicing.

3. When servicing, observe the original lead dress. Ifashort circuit

isfound, replace all parts which have been overheated or

damaged bythe short circuit.

4. After servicing, see to itthat all the protective devices such as

insulation barriers, insulation papers shields are properly

installed.

5. After servicing, make the following leakage current checks to

prevent the customer from being exposed to shock hazards.

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.

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 Wresistor, inparallel with a0.15 F

capacitor, between each exposed metallicpart on the set and a

good earth ground, as showninFigure 1.

3. Use an AC voltmeter, with 1M /Vor 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 VRMS. A

leakage current tester (Simpson Model 229 or equivalent) maybe

used to make the hot checks, leakage current must not exceed 1/2

mA. Incase ameasurement isoutside of the /limits specified,

there isapossibilityof ashock hazard, and the equipment should

be repaired and rechecked before itisreturned to the customer.

Figure. 1

2. 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 aluminum

foil, to prevent electrostaticcharge buildup or exposure of the

assembly.

3. Use onlyagrounded-tipsoldering iron to solder or unsolder ES

devices.

4. Use onlyan antistaticsolder removal device. Some solder

removal devices not classified as "antistatic(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, aluminum 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

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).

3. X-RADIATION (Model: A, C, D)

WARNING :

1. The potential source of X-Radiation inEVF sets isthe High

Voltage section and the picture tube.

2. When using apicture tube test jigfor service, ensure that jigis

capableof handling 10 kV without causing X-Radiation.

NOTE :

Itisimportant to use an accurate periodicallycalibrated high

voltage meter.

3. Measure the High Voltage. The meter (electrostatictype) reading

shouldindicate 2.2kV±0.1kV. Ifthe meter indication isout of

tolerance, immediate service and correction isrequired to prevent

the possibilityof premature component failure. To prevent an X-

Radiation possibility, itisessential to use the specified picture

tube.

4. OPERATION GUIDE

5. SERVICE NOTES (PLEASE READ)

5.1. SERVICENOTES

5.1.1. EXTENSION CABLES FOR SERVICE

NOTE:

1. When using the cassette tape:

A. Besure to remove acassette lidcover of cassette tape.

B. Besure to install the Lock Screw to Cassette UpUnit. After

servicing, be sure to remove the Lock Screw.

Refer to "HOW TO HOLD THE CASSETTE UPUNIT IN THE

DOWN POSITION WITHOUT CASSETTE COVER INSTALLED."

C. Select the H. SafetyDefeat inSERVICEMODE. Refer to "

SERVICE MODE SPECIFICATION (SELF-DIAGNOSTIC SYSTEM).

Or, connect asilicon diode on component side of the Main

C.B.A. as shownto defeat safetyfunction.

(Since Takeup Reel sensor, located on MainC.B.A. does not

work when opening MainC.B.A., the mechanism does not work

(Reel lock). Therefore, make sure to defeat Safetyfunction.)

2. Use extreme care so as not to applyanyexcessive pressure to

the Cylinder/Head Amp F.P.C. After servicing, be sure to place it

correctly. Refer to "Cylinder Ass'y"in"MECHANISM SECTION."

3. The LCD open/close SW. isfor changing between LCD Displayor

EVF Display. When turning on LCD Display, place some paper or

tape, etc. on LCD open/close SW. so that thisSW. staysON.

4. Use agrounded ESDwrist strap whiledisassembling the Lens

portion.

5. Use extreme care when unplugging or plugging inconnectors.

Fig. 1-1

5.1.2. INTERCONNECTION OFEXTENSION CABLES

Fig. 1-2

5.1.3. HOW TO HOLD THE CASSETTE UPUNITIN THE DOWN POSITION

WITHOUTCASSETTE COVER INSTALLED

The Cassette UpUnit will be inthe up position without the Cassette Coverinstalled.

To holdthe Cassette UpUnit inthe downposition without it, a Lock Screwis needed.

5.1.3.1. Howtoinstall the Lock Screw:

1. (With Cabinet Parts) Before installing the Lock Screw, slide the CF

Card Connector Unitas showninFig. 2-1.

2. Ifthe Lock Lever, showningray, isset to Position "A"(Nohole),

change Position "A"(Nohole) to Position "B"(Hole) as shownin

Fig. 2-2 bypushing Portion (a) as showninFig. 2-1.

Note:

Ifthe mechanism isinEJECTposition, the Lock Lever cannot be

changed to Position "B"bypushing Portion (a). Inthiscase, apply

the power to set the mechanism to STOPposition.

Fig. 2-1

Fig. 2-2

3. Install the Lock Screw inthe Hole(Threaded Holefor Lock Screw

access) inPosition "B".

4. Holddownthe Cassette UpUnit.

5. Confirm that Cassette UpUnitwill be heldinthe downPosition.

5.1.3.2. Lock Screwis requiredwhen:

1. performing "Tape InterchangeabilityAdjustment."

2. performing"PC-EVRAdjustment" with cassette tape.

3. servicing with cassette tapeinService Position. The procedure

below isrequired when the unitisinsafetydefeat mode.

A. Confirm that the Lock Lever, showningray, isset to Position

"A"as showninFig. 2-1, and that the mechanism isinthe

STOPposition.

B. Insert the cassette tape.

C. Push Portion (a) as showninFig. 2-1 whilekeeping the

Cassette UpUnitinthe downposition so the mechanism starts

loading. (Cassette DownSwitch isON.)

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