Technicolor - Thomson LDK 20(S) technical manual Introduction, Printed circuit boards

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Introduction

Printed circuit boards

The instructions given in this section are restricted to those modules which can be replaced at the first line level. After a printed circuit board has been replaced it is sometimes necessary to carry out adjustments to match the new boards to your camera and so maintain the performance levels. The relevant adjustment procedures are referenced in section 4.

The procedures for removing the modules should be followed in reverse order when remounting the units.

To remove a printed circuit board proceed as follows:

a.Open the side cover (see section 2).

b.Swing the black cover 1 of the printed circuit board open.

c.Pull horizontally on this cover to free the board from its connector and slide it clear of the camera.

1

3-2

Technical Manual LDK 20(S) - Studio Camera

Replacements

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Contents Technical Manual Declaration of Conformity LDK 20S Studio Camera Technical Manual Contents Service policy About This ManualPurpose of this manual Intended audienceSection Safety Instructions Safety Summary According to IEC65Earthing Cathode ray tubesTechnical Manual LDK 20S Studio Camera Safety Instructions Section Installation Local / Remote Power Supply Packing/UnpackingHardware Setup and Customization Location of adjustmentsInternal signals External signalTest Sawtooth Lens matching Dipswitch Settings External Aspect Ratio SwitchAnalogue Ch1-Ch2 Viewfinder Cadre Indication Cadre On/OffCadre appearance Audio / Intercom settings Audio microphone signalsIntercom headset signals Intercom microphone signalsPrivate Data Connectors and Cables VTR connectorTriax connector Viewfinder connector Pin female panel view part number 3922Camera headset connector Audio microphone connectorsAuxiliary connector Tracker communication connectorData connector Script light connector Cable connector part numbersSpecifications LDK20 Camera systemSection Replacements Introduction Printed circuit boardsFront module Filterwheel Cassette Power supply Section Adjustments Adjustments Test Equipment Set-up InstructionsExtender Board Setting-up the Camera Video Processor 1 BoardSync./Shading Board Black Offset Vertical sawtooth offsetZR111 ZR206Ampl R Ampl GTest Sawtooth Nominal Settings 15. Sawtooth amplitude Video outputDigital Video Processor Black Offset Level Digital Video Processor Subboard Gain DAC NtscZR525 X51 ZR541 Black off set Limiter sharp G MP500 ZR830 Output amplitude readjustment Gain VideoWhite limiter VF-Mon outputVideo Miscellaneous Board ZR85 ZR92Sync Ampl LevelVF sync. oscillator Output amplitudeB-Y white balance ZR85 ZR92 White Pulse Amplitude Video Mux outputVideo Miscellaneous Board White pulse amplitude Monitoring camera outputB/Y/VFCNT Black indicator level Indicator Indicator ZR90 StartEnd Stop ViewfinderZoom bar Focus barDummy X55Setting-up Black Shading CorrectionZR265 MP409 ZR465 ZR466ZR666 Dummy offset adjustment DC level adjustment at 45oCPulse compensation ZR237 ZR238ZR239 ZR637Edge clip level Edge gain correctionHor. sawtooth correction Nom. Exp Hor. sawtooth correction 1/1000 ExpSaw Black ZR208ZR214ZR211 Offset RSync/Shading Board White shading exposureVideo Miscellaneous Board Auto iris Encoder Board PAL ZR203 ChromaBalance Balance R14Set-up Black balanceCvbs amplitude Burst Phase ZR202Gain ZR211B-Y phase Burst phaseOsc. Preset ZR217 Sc-H PhaseZR209 BurstGenlock free-running preset Sc-H phase relationshipBurst amplitude Burst timingEncoder Board Ntsc White bar amplitude ZR205 MP8Smpte bar shift MP7 90 phase ZR201 AmplitudeZR207 ZR215Adjust the I and Q bars for an amplitude of 286mV 40 IRE Bar amplitudeAudio/Intercom LF Board ZMP0Audio 1 level Audio 1 limiterAudio 2 level Audio 2 limiterAudio/Intercom LF Board Cameraman intercom microphone Cameraman intercom microphone PLLimiter level camera microphone Cameraman intercom microphone TRSAudio/Intercom LF Board Audio/Intercom LF Board RTS Mode CH1 fork attenuation ProdCH2 fork attenuation ENG Pre Processor Board Gain Adjustment Pre-Processor BoardTechnical Manual LDK 20S Studio Camera Section Drawings Block Diagram Power Signals Block Diagram Video Signals 104 RZ 610 RZBlock Diagram Transmission Signals PanelBlock Diagram Control Signals Data BoardTechnical Manual LDK 20S Studio Camera