At site C401 of main board. Cap is some kind of polymer electrolytic,
but rectangular, not cylindrical. Roughly 9/16"H x 1/2"W x 1/4"D,
black plastic case,
with flat sheets of polymer/plastic inside. Markings as follows:

S 5.5V
0.1F
- 6A +

This is on the output of a 7806 regulator (IC401). Cap was cracked,
regulator ran warm but works out of circuit. Did Denon actually intend
to use a 5.5V cap on a 6V rail, or is this an incorrect substitution?
Solder joints on cap appear to be factory, but the silkscreen for this
part is round.

Thanks,
Tony