i was searching a service manual for ONKYO TX-NR555 found only user manual for it.
Then I check higher model TX-NR656 and found 555 model is part of it, as well as a few more models from the same batch.
can you please place the links for:
TX-NR555, TX-NR757,HT-R695, TX-RZ610, TX-RZ710, TX-RZ810
pointing to TX-NR656, since they use same schematics.
it would help other users to fine missing service manuals easier.