[ICOM] bias setting on driver RD15HVF1

[hamop]

Group:
   Have one of the drivers out on the PROIII, the RD15HVF1. I do NOT have a tech manual. When I have installed the new driver transistor what is the bias setting procedure? There are bias pots for each driver and each final, so I assume the pots are set not for a specific bias voltage but for a certain current. Does anyone have a brief reference from the tech manual on setting biases on the driver/final board? Should I be looking for a ‘no power’ output current draw, at least for the drivers? Thanks  for any  suggestions!
San K5YY   ( late model 756 PROIII with MOSFETs, not bipolar finals )