Video head cleaning, Condensation, Maintenance | Panasonic AJ-SD755

Video head cleaning

This unit is equipped with an auto head cleaning function which automatically reduces the amount of dirt on the video heads. However, in order to maximize the unit’s reliability, it is recommended that the video heads be cleaned as and when appropriate.

For further details on how to actually clean the heads, consult with one of our service companies or with your dealer.

Condensation

Condensation occurs due to the same principle involved when droplets of water form on a window pane of a heated room. It occurs when the unit or tape is moved between places where the temperature or humidity varies greatly or when, for instance:

O It is moved to a very humid place full of steam or a room immediately after it has been heated up.

O It is suddenly moved from a cold location to a hot or humid location.

When moving the unit to locations such as these, leave it standing for about 10 minutes rather than switching on the power immediately.

If condensation occurs in the unit, “E-20” will flash on the counter display and the cassette will be automatically ejected.

Leave the unit with the power on until “E-20” is cleared from the display.

Maintenance

Before starting any maintenance work, switch the power to OFF and, holding the plug, unplug the cord from the socket.

Use a soft cloth to clean the outside of the unit.

For stubborn dirt or stains, wipe the unit with a cloth that has been lightly dampened with well-diluted kitchen detergent and wrung out thoroughly.

After wiping off the dirt with the damp cloth, finish it off with a dry cloth.

<Note>

Do not use alcohol, benzene, thinners or any other solvents as they may affect the color of external parts or damage the unit’s coating.

Attaching the dust cover

2 Insert the end of the cover	Dust cover
2 Insert the end of the cover
under the metal plate on the
inside edge of the top of the
front panel.

1Insert the end of the cover under the metal plate on the inside edge of the top of the side panel.

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Panasonic AJ-SD755 Video head cleaning, Condensation, Maintenance, Attaching the dust cover, Insert the end of the cover

Contents

Operating Instructions Model No. AJ- P $ this Apparatus Must be Grounded Contents Introduction Features Dvcpro Parts and their functionsFront panel Video Stop button Play buttonREC button FF button JOG PlayerRecorder Shtl Preview Review Unity VAR Regen PresetOFF EXT Display panel REC INH Edit RECREC OUT Rear panelIN/OUT Cmonitor OUT connectors Parallel Remote connectorAnalog Audio OUT connectors = Signal GND terminal Recorder ConnectionsSource machine OFF Recorder AV monitor AV monitor Reference signal GeneratorConnections with editing controller Editing controller Cassettes TapesConsumer-use DV and Dvcam cassettes Cassette size Jog mode Jog/Shuttle Assemble Manual editingPreroll Insert When using the AJ-SD755 as the player Switch settings and adjustmentsWhen using the AJ-SD755 as the recorder Automatic editing deck-to-deck Match frame processing function Selecting the editing modeAssem How to calculate the duration Checking and previewing edit points Modifying edit points Re-registering an edit point Retry function Executing and reviewing automatic editingPost-rolling Auto tag function recorder side Audio split editing Between the audio in and OUT points $ Duration displayBetween the video in and OUT points Match frame processing system $ Releasing variable memory mode Variable memory editing operation procedure$ Selecting the variable memory mode Variable memory editing Changing the settings Setup initial settings Changing the file Setup menusSetting and releasing the lock mode System Loading user files Lock mode can be setLock mode can be set Counter display Menu screen Load/save Saving user files Menu screen System menu SYS SC/H SET UP LevelOffset Local User menu Basic User menu Basic Operation Memory stop function Eject SW REC INHLamp INH Interface Edit Auto Entry AUD EditAUD Edit OUT CF ADJ SEL Tape Protect Time Code SBC RUN ModeVitc OUT Vaux CCR Mode YC SEP ModeESR Mode INT SG CUT SetupCmpst Cmpst OUT Umid POS Umid GENINT CH1 OUT LV CH1 in LVCH2 in LV CH2 OUT LV User menu Audio DV Output DV PB ATTREC PT Mute REF Level REC LINE1 BlankADD Line REC LINE2 DET Number of lines which can be set for TeletextTeletext REC LINE13 Menu Time code Setting the internal time codeTime code/user bit User bit Vitc Setting the external time codeLTC Characters displayed Operation modeSuperimpose screen Display position REF Video input signal Video output signals and servo reference signalExternal synchronization of video output signals Internal synchronization Servo reference signal Fade is performed instantaneously to eliminate the noise Audio signal aAudio V fade function Audio recording channel Audio recording channel and monitor output selectionPrinted circuit board Monitor output channel Standard rack Fasten it to the rack with set screws Rack mountingRack-mounting adaptors Condensation Video head cleaningMaintenance Attaching the dust cover $ Displaying the Diag menu Error messagesDiag menu $ Warning information display $ Displaying the Hours Meter information $ Umid information display Invalid Video SIG High Error RateUnknown SIG Invalid Audio SIG Error messages Reel Rota VTR Stop TOO Fast Tension VTR Stop ErrorTorque VTR Stop Error Reel Connector specifications Hardware specificationsExternal interface specifications RS-232C interface Send format controller PC 5 VTR Software specifications ProtocolCommunication parameters Return format VTR 5 controller PC Error code table$ When the communication has terminated normally Command table $ Commands relating to operation control Request $ Commands relating to inquiriesCTL/TC Data STX QCD ETX Status STX QOP ETX Sdti signals Precautions to observe when using the Sdti signalsSource Reference signal Generator Sdti interface Remote OUT Connector signalsRemote IN/OUT RS-232C SUB 25-pin crossover cable supported Specifications Other Input/Output Connectors Western Zone Panasonic Broadcast & Television Systems CompanyEastern Zone Technical Support