v672/1 problem

[garp]

Hi everyone i have two v672 (one v672/1 and one v672/2 both with metal can ic labeled 709) that suddenly had same issue in a rack with v676a on same power supply. The v676a worked well but some smoke came out of the rack and the v 672  seemed to not pass audio anymore. it appears that r314 (47 ohms at the output of the ic301 ) was close to burn (even if not totally) ... any idea ?
Is there a source for this ic ? It is not the flat film one but a "transistor like" round metal can ( is it a metal version of the lm709 ?)

 

[synthiaks]

my first guess would be a uA709/LM709

Why is it suddenly doing strange stuff?

Original caps still in there?

First answer, as always... Recap!

/S

 

[NadMk]

If the resistor at the output of an OpAmp  gets hot is because it is drawing too much  current, maybe because of a shortcut.
What if you unplug the output conector?