Steven Tate
CEO Flat Forehead Soc.
At the bottom of the service manual are several pages of parts lists, organized by board. Look for the P800 section (power supply) and look for prefix C, like C801, then look for the ones that are electrolytic (the type is listed on the chart). These will correspond to the numbers on your board. It will give you values in capacitance and voltage rating. Next step is to compare what is on the board to the list. Occasionally they differ. When they do, go with what is on the board if it looks original (no sign of resoldering on the bottom). Do you have soldering/desoldering experience? If not, work on some throw away boards before diving into your Marantz. If you do decide to recap your power supply, a good cap type would be Nichicon PW series like rBuckner described. Get them from Mouser or Digikey. One last piece of advice: take good photos of the board before you change anything. Make a record of the negative side of every cap (usually has a stripe on that side of the cap), and when you remove a cap, compare the polarity to the silkscreen marking on the board. On rare occasions, the board is marked wrong. You want to replace polarity the way it was originally if it differs from the board markings, otherwise, things may go pop and sizzle. If you are new to this type of work, start by reading Echowars excellent primer here:
http://audiokarma.org/forums/index....udio-gear-eh-heres-the-tools-you-need.333423/
http://audiokarma.org/forums/index....udio-gear-eh-heres-the-tools-you-need.333423/