Panasonic WE-MV180A Service Manual

Also see for WEMV180A - VIDEO IMAGER: Operating instructions Operating instructions

53. Connection and Reference Levelsfor Adjustment3.1. Connection8 The Fig. 3-1 shows the connection diagram for theadjustment procedure.Fig. 3-18 Connect the Underscanned Colour Video Monitor to theComposite Video Output Connector of the WE-MV180Athrough the Vectorscope using the coaxial cables.8 Terminate the input terminal of the Underscanned ColourVideo Monitor with 75 Ω.8 Connect the RGB Video Output Connectors to the R, G, Band Sync Input Terminals of the RGB Colour VideoMonitor.8 Connect the S-Video Signal from the Video SignalGenerator to the S-Video Input Connector 1 or S-VideoInput Connector 2.8 Connect the probe of the Digital Voltmeter, Oscilloscopeor Frequency Counter at the desired Test Point in eachadjustment step.8 The adjustments should be done more than three minuteswarm-up.3.2. Reference Levels Confirmation forAdjustment S-Video Signal8 Supply 100% Colour Bar signal to the S-Video InputConnector 1.8 Select the A/V 1 mode by the Input Selector.8 Connect the Oscilloscope to TP14 on the Video Board andnote the signal level as reference (Vy) as shown in Fig. 3-2.Fig. 3-2VectorscopeUnderscannedColour VideoMonitor75 ΩVideo ImagerWE-MV180AVideoSignalGeneratorCN1VideoBoardInputBoardCompositeVideo OutRGB ColourVideo MonitorR OutG OutB OutSync OutS-VideoCompositeVideo8 Change the connection of the Oscilloscope to TP15 on theVideo Board and note the signal level as reference (Vc) asshown in Fig. 3-3.Fig. 3-3 Composite Video Signal8 Supply 100% Colour Bar signal to the Composite VideoInput Connector 1.8 Connect the Oscilloscope to TP16 on the Video Board andnote both Luminance signal level (Vycm) and Burst signallevel (Vccm) as reference as shown in Fig. 3-4.Fig. 3-44. Adjustment Procedure8 Refer to the Location of the Test Points andAdjusting Controls on the page 17.8 All adjustments should be made with the CeramicScrewdriver. Power Board(1) +12V AdjustmentTest Point: Pin 1 of CN14 (+12V) Power BoardPin 3 of CN14 (GND) Power BoardAdjust: VR1 (+12V) Power Board8 Connect the Digital Voltmeter to the pins 1 and 3 of CN14.8 Adjust VR1 to obtain between +12.1 and +12.2 V DC.S-Video SignalReference Y Signal (Vy)CompositeVideo SignalReferenceY Signal(Vycm)CompositeVideo SignalReferenceBurst Signal(Vccm)S-Video SignalReference Burst Signal(Vc)