"Being a member of the International Cricket Council (ICC) we are following the events there with interest. But we want to make it clear they do not affect the scheduled tour in September-October," Raja was quoted as saying by local daily The News.
Zimbabwe are due to play two Tests and five One-day Internationals in Pakistan.
"The PCB would start its preparations for hosting the Zimbabwe team on schedule and it would like them to come with a full strength side," he said.
Leaving the crisis to be settled by the Zimbabwean cricket authorities as it is "their internal matter" Raja said "like all other Test playing nations, we would like the crisis in Zimbabwe cricket to be resolved amicably as it would be good for international cricket."
Zimbabwe cricket plunged into turmoil six weeks back following the sacking of former captain Heath Streak and the strike of white professionals which followed.
The Zimbabwe Cricket Union (ZCU) first fired the 12 white cricketers for alleged breach of contract but on Friday withdrew their controversial decision and issued a fresh 21-day notice for the players to make themselves available to play.