Panasonic AG-MD830E Service Manual

4-3-19. S-VHS SUPER LlMITER ADJ.BOARD VIDEO 1 C.BATP TP3003(C-2)ADJ VR3007(C-2)TAPEINPUT SINEWAVE (7MHz 200mVp-p)MODE E-EM.EQ OSCILLOSCOPESPEC 4OOmVp-p + 20mVp-pNote: Prepare the oscilloscope which is type's morethan 1OOM Hz.[SET UP]S-VHS ON1. Set the signal generator (sine-wave) to 7MHz,200mVp-p and supply it to TP3004.2. Connect the 100MHz type's oscilloscope toTP3003.3. Adjust VR3007 so that the level becomes400mVp-p ± 20mVp-p as show in Figure E18.Figure E18400mVp-p±20mVp-p4-3-20. WHITE BALANCE ADJ.BOARD VIDEO 2 C.BATP VIDEO OUTADJ VR3302(D-1), VR3303(D-1)TAPE S-VHS SELF RECORDED TAPEINPUT COLOUR BAR SIGNALMODE PLAYM.EQ VECTORSCOPESPEC REFER TO FIG E19[SET UP]S-VHS SWINPUT SWONLINE1. Supply the colour bar signal to video input.2. Record the colour bar signal by S-VHS mode fora few minutes.3. Connect the vectorscope to video output.4. Playback the just recorded portion.5. Adjust VR3302 and VR3303 so that the point "C"becames center as shown in Figure E19 ..... CENTE,--_V-0, POINT CCENTERVECTORSCOPEFigure E194-3-21. PLAYBACK CHROMA LEVELADJ.BOARD VIDEO 2 C.BATP VIDEO OUTADJ VR3304(D-1 )TAPE S-VHS SELF RECORDED TAPEINPUT COLOUR BARMODE PLAYM.EQ WAVE FORM MONITORSPEC O.65Vp-p ± O.03Vp-p[SET UP] S-VHS SW: ON1. Supply the colour bar signal to video input andrecord it for a few minute.2. Connect the waveform monitor to video outputwith a 75Q termination.3. Playback the just recorded portion.4. Adjust VR3304 so that the cyan level becomesO.65Vp-p ± O.03Vp-p as shown in Figure E20.4-9VIDEO OUT(75Q)(H. RATE)r--r-r-.--...... - - - - - - -- - - - ~'-+-++--.Figure E20CYAN LEVEL0.65 ± 0.03V p-pCl)~zw~~Cl)=>...,Cl«..J«()a::~()W..JW