I've seen several requests online for the CMC6 schematic over the years.. but never seen one posted?
However, I have seen a couple of forum comments that suggest that the CMC6 schematic is almost identical to the CMC5 with the exception of a different LF roll off, and the addition of a voltage regulator. The CMC5 schematic is widely available online.
The block diagram on Page 8 of tends to suggest that maybe true? If so, it maybe possible to check that the voltages around the two output transistors are similar, to help eliminate those from your investigations? ....??
Although there are 6v2 zener ptortection diodes across the C-E junctions of the output transistors, I'm not sure they would necessarily protect the B-E junctions of those same transitors, in a 'hot plug' situation?
