Panasonic PalmSight PV-L750 User manual

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.
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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
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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
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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
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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."
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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
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5.1.2. INTERCONNECTION OFEXTENSION CABLES
Fig. 1-2
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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
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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
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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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