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Digital equipment that has to interface with the analog world needs to support two different black levels. In analog, "black" is 7.5 IRE, which is sometimes referred to as setup. This has to do with the particulars of an NTSC signal. Digital gear has 0 IRE for black. There might be a menu adjustment available for this, it might switch based on analog or digital signal source (if that's supported on your machine) or it might not be adjustable by the user. Machines made when both systems were commonplace had to make some compromises.
If you can get access to a service manual, it will probably show what the design intent is, and outline adjustment procedures. You'll need a waveform monitor for this, and a vectorscope for color adjustments. If you choose digital/computer based options for these, using an interface, keep in mind that the particulars of that system may influence the accuracy of any measurements you make on the player.
Chip
Last edited by Chip Chester; 05-23-2016 at 08:11 AM.
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