Ok it is ths same designation on this amp. IC4C pin 1 is connected to pin 7 of HIP4080. Only difference is this op amp is labeled as a 2068DD. With black probe on rca shield I get:
Pin 1 1.38v
Pin 2 6.80v
Pin 3 6.69v
Pin 4 ground
Pin 5 6.69v
Pin 6 6.70v
Pin 7 6.86v
Pin 8 12.22v
Now shouldn't pin 1 be higher?
I also read 1.38 v on pin 7 of 4080.
Pin 1 1.38v
Pin 2 6.80v
Pin 3 6.69v
Pin 4 ground
Pin 5 6.69v
Pin 6 6.70v
Pin 7 6.86v
Pin 8 12.22v
Now shouldn't pin 1 be higher?
I also read 1.38 v on pin 7 of 4080.
The pin 1 voltage is OK. If you bridge pins 1 and 2, you should see voltage that's essentially identical to pin 3.
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