[time-nuts] Help needed with HP 16700A

[Peter Loron]

Bizarre. So the problem follows the bad board? I may try swapping out  
the parts on the board anyway. looks like some tantalum caps, diodes,  
and a resistor or two...

Any pointers to what the values should be there? The service manual  
doesn't go into any of that detail...

Thanks.

-Pete

On Aug 4, 2009, at 1:18 PM, Mark Sims wrote:

>
> I have one of these with the same symptom.  The problem is with that  
> little interface board with the PS/2 connectors.  I can swap it with  
> one from another system and it works fine.
>
> The real problem is that board is just connectors and some EMI  
> filter R's and C's.  I replaced the PS/2 connectors and it does the  
> same thing.  I have checked all the other parts on the board and  
> buzzed out all the connections (including to the end of the  
> interface cable).  Everything checks out just fine...  everything  
> compares identical to the known good board...  still no worky...
>
> ----------------------------------------
>