[time-nuts] 5370B stop trigger not working

[Cok]

According to the partlist A4U1 and A4U2 seems to be TL072CP opamps.
>
> jim77742 at gmail.com said:
>> I have gone through the troubleshooting process from the manual and it seems
>> to point to A4U2 (Schmidt trigger) being faulty.
> I'd put a scope on it to check.
>
>> Before I dive into this, does anyone have any advice? Most important being
>> the Schmidt trigger - where do I get one?
> You need more info - the manufacturer's part number or something like that.
>