Panasonic AG-1980P Service Manual

Also see for ProLine AG-1980P: Operating instructions Service manual Operating instructions

3-3-7. S-VHS Y PB LEVEL ADJ.TP VIDEO OUTADJ. VR30005 (Y/C PACK : A-7 )MODE REC PLAYINPUT COLOR BARTAPE S-VHS BLANK TAPEM. EQ OSCILLOSCOPESPEC 1.0 ± 0.05Vp-p1 . Connect the oscilloscope to video output connectorwith 75 ohm terminated.2. Adjust VR30005 so that Y level is 1 ,0V ± 0.05Vp-p.(Refer to Fig. E7)VIDEO OUT(H.RATE) _J1.0Vp-p±0.05VIT.Fig. E73-3-8. COS EQ PEAK ADJ.TP CP3005 (MAIN C.B.A. : D-5 )ADJ. VR3002 (MAIN C.B.A. : H-6 )MODE STOPINPUT SWEEP SIGNAL (20mVp-p)TAPE S-VHS BLANK TAPEM. EQ OSCILLOSCOPESPEC 7.2 ± 0.2Vp-p1 . Connect the Service Circuit to CP3005 and supplythe sweep signal.2. Set the output of sweep generator to 20mVp-p with7.2Hz marker.3. Turn VR3001 to full counter-clockwise.4. Adjust VR3002 so that 7.2Hz is maximized.(Refer to Fig. E9)Note:Must be perform the S-VHS Frequency ResponseAdjustment, after this adjustment.3-3-9. S-VHS FREQUENCYRESPONSE ADJ.TP VIDEO OUTADJ. VR3001 (MAIN C.B.A. : H-6 )MODE REC => PLAYINPUT 30% SWEEP SIGNALTAPE S-VHS BLANK TAPEM. EQ OSCILLOSCOPESPEC lOOKHz : 4MHz = 5 : 3.5 +0°51 . Connect the oscilloscope to video output connector.2. Playback the just recorded portion,3. Adjust VR3001 so that the sweep signal is100 KHz:4MHz = 5:3.5 + 0°53-3