MODU1 SLA1500 driverboard

[Bertje]

Hello,
From the Sinus Live SLA1500 like class d amps, i have a defective driverboard MODU1. But don't know the type of the defaced IC's on there.
I can see a 74HC00 on the right, Who know's the partnumbers of the other two IC's, opamp and comparator i think?

 

[Perry Babin]

See attached.

Before I had any information on these, I used an LM393 in the place of the 6271. The comparator relies on pull-up resistors (generally two 1k to 5v).

I've seen various differences. The TL072 has been given as an LM292 and as a 4560.

 

[Bertje]

Thanks a lot!