[time-nuts] Re: TRAK Systems 8812 (marco bartoli)

[John]

My guess is that the 40 pin chip will be the special-programming 
Motorola 68k-series GPIB interface processor. Not normally available, 
although probably recoverable from scrapped gear. Will the programming 
be identical? I don't know.

John

nuts at lists.febo.com>> wrote:
> Even if I receives the six satellites correctly, apart from the week roll over issue, I never have the LOCKED led on the front panel.
> So seems PLL circuit doesn't work at all.
> If I try to set new value from the terminal  I got ok message as response, but on the display ( DAC REF 2050 OSC CAL OK) .. I did not find any DAC, and this is the reason why the reference voltage on the rubidium didn't change
> Since some ic are not in place, just the socket, I am start wondering if this are optional or not.
>
> Attached a picture of my 8812 main board, where some ic seems.to<http://seems.to> miss.
>
> U12, U25, U45, U46.
>
>
> Can some good soul, send me a picture or tell me which ic should be in place ??
>
> Thank You indeed