For my Sony SLV-D500P... The tape player works fine as long as you manually record or play tapes. However the on-screen menu setup for the DVD or Tape or in general displays the horizontal bars like the old TV tuner dials (fine tune with separate buttons) My question is there an adjustment or variable piece that can be turned or replaced to bring the picture back? (fine tune). And/or is this circuit identified in the player or on the schematic? And if so which way do you turn it or replace it, after you have identified it? Greg