Lexicon 200 chip U85 possibly faulty

[radardoug]

Hi all, does anyone have a working Lexicon 200 and the ability to read a preprogrammed chip in it? Its U85, a 74S287. Lexicons number is 350-03495. I have a Lexicon 200 in which the gain ranging is faulty, and after a lot of work on it, I think it is this chip.

 

[jensenmann]

I gave my L200 to a friend who is EE and has a programmer IIRC. If you pm me I´ll connect you with him. He´s a nice bloke, I´m pretty sure that he will help you.