Mike Hi and welcome to AK!
According to the SM, only C006, C005 and C010 are oil caps on the power supply board. I believe these are usually OK to leave alone as they are very stable. If you go to the AK database you will find posts of the 2230 cap list and Service Manuals. If you run into issues or have questions with your unit, just start a new thread.
http://akdatabase.com/AKview/
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