Fwd: [GreenKeys] ST-6 help?

[Eugene Hertz]

Tuning...

I found the tuning procedures on rtty.com.  But I am having trouble at the very first step! First step reads:

"FIRST - disconnect the audio input or short the input to ground. Put the voltmeter on test point 1 (output of the limiter op amp) and adjust the 25K pot on the input to pin 3 of OA-1 for zero volts DC on the meter. It will be difficult to do and the read in will not necessarily "hold", but do the best you can and forget about it"

I have made the assumption (yes, I know) that the board in question is the 170hz limiter (given the use of the words "limiter op amp")  This would seem to indicate board #4 from the left. However, I cannot easily identify the test point. Also, it mentions the 25k pot which is input to pin 3 of the chip.   However, on my board it appears the 25k pot actually connects to pin 5 on the chip.

So I am confused right out of the gate! any guidance much appreciated

Thanks
Eugene