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Repairing Hafler DH-120 Balance Adjustment

So I’m finishing up repairing one channel on this amp. Replaced the lateral mosfets with Exicon To3 outputs. Also replaced a few drivers and resistors. For an extra step, I replaced the electrolytic caps. and adjustment trim pots, on both driver boards. I measured the settings of the trimmers and pre-set the new trimmers before installation.
Since it is not recommended to set the balance (distortion) adjustment from the manual, has anyone found any instructions on how to do the adjustment with an oscilloscope. and DMM.??
Since I replaced some critical parts on the driver section, I think that the balance adjust may need to be checked or changed. The original trim pot. setting for the repaired channel may not apply any more.

Thanks, Bill

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