I agree with the others.
Mr Pippa went through all this with his ex too. He went to court after social services interviews and meetings, and the court decision went in his favour...overnight contact every other weekend plus holidays.
Your partner needs to write down what contact he would like to have, and an amicable decision should be sought. There is no reason whatsoever for his ex to deny contact, and as has already been said maintenance is nothing to do with contact.
The judge will look favourably on *absent parents* (I hate that term!) who do maintain their children financially, but they usually detest resident parents who use their children as bargaining tools.
I am sure your partner will be fine ~ however if contact is stopped during court proceedings (as often happens) make sure he documents this, keeps any evidence of phone conversations, letters etc and most importantly keeps the lines of communication open ~ he needs to prove that he has tried to keep contact with his child going despite his ex's behaviour.
Good luck, and please let us know how he gets on x