Capacitor types on FR 7710 amp 012835 board?

[vanceinatlance]

Greetings,
I could not find any info on this subject from my searches, so, here goes.
The fr7710 amplifier (board #012835 assy #012838a) has a capacitor C1 listed as 5Uf 25v on the schematic that I referenced from the supersite. On the other 012835 board from the same amp, capacitor C1 appears to be non polarized of the same value. The one I just pulled from my bad channel appears to be polarized?!? It appears to be an original capacitor. Does anyone know if this is supposed to be non polarized or not?
I understand I am working with dangerous and possibly deadly voltages/currents at my own risk. I waive any rights to hold anyone accountable for advise given to me from this site. If I hurt or kill myself working on any piano and or it's electronics it will be my sole fault (probably from my old shaky hands) and I will have lived a happy life doing what I love.
Any info will be appreciated very much!
Thanks,
Vance