I recently picked up an Onkyo M508 that had low garbled output from one channel. Unfotunately I read the DC Offset sticky after I messed things up. I was attempting to adjust the idle current and adjusted the L401,402 "coils" instead of the bias pots. They look like little silver silver boxes with black plastic adj. screws on the left side of the power caps. The amp is now in protection mode and does not "wake up". Does anyone know what these adj. coils do and how to get them back to where they should be. If they need to be replaced how do I determine electrical values for new parts? They are listed in the service manual as NCH 4145. Any thoughts or suggestions would be much appreciated.
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