Need help with HK 640

Hello, Happy New year to all or you.
I’m new with the forum (it’s my First post) but I’m reading you from a long time.

I need your support
my Harman Kardon HK640 power Xformer is gone.
Can I use some alternative one?
I can’t see the power details because i’m not good at this.
Can you help me please (voltages, etc...)
regards

Paolo