Re: DVD Player With Accessible Test Mode Menu


"Kevin" <kevin@xxxxxxxxxxxxxxxxxx> wrote in message
news:g6o645$i8h$1@xxxxxxxxxxxxxxxxxxxxxxxxx

Arfa, thanks for the information.

I purchased the service manual for a cheap Sony DVD Player, DVP-NS57P for
$7.99, which I downloaded from http://www.completeservicemanuals.com From
the service manual, I found that this DVD player does, in fact, have a
test mode, so I ordered 3 of the DVD players for the classes.

Kevin


In "Auto Adjust" mode - usually option 0 - some of the Sony models used to
tell you what they were doing on the screen such as "focus offset adjust" ,
whilst others just got on with it, and only told you whether a test and
adjustment of a parameter set, had passed or failed. The ones which told you
what was going on, used to put up a table of results at the end, which was
very useful for assessing the state of the laser. Most of the adjustments
ranged in value from 00 to FF, so you were usually looking for a setting
somewhere around the middle of that range, 2F or so. Any that came up
significantly different from that sort of value, usually indicated trouble.
It was interesting to see the differences in focus offset value that the
diagnostics had calculated, for layer 0 and layer 1.

If the players that you have ordered have this kind of display, you should
be able to use it as a good illustration in your classes.

Arfa


.

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