Okay you can run an unbalanced signal into a balanced input but obviously it won't be balanced.
You need to have the wiring correct however.
The easiest way if you are not going to wire up your own cables might be a cable to convert the 1/4 jacks into XLR sockets and then another cable to take the phono output and turn it into an XLR plug.
Here is an example:
Note how the jacks on this cable are STEREO! This is because the stereo jack carries both the in phase and out of phase audio signal for a connection.
Heres a nice little box that does the same thing:
Once you have a cable like this then if you have a phono to XLR cable it will also be wired correctly as phono is unbalnaced and XLR is balanced.