Official comment
@Sameer > Sorry about that, I would contact the retailer for an exchange - if they're unwilling to provide a replacement, you'll need to contact a Pioneer DJ authorized service centre in your region to have your XZ repaired.
@Twisted > It's not a common issue and doesn't occur in batches, but we are aware of the fact that some have had this problem out of the box and have already changed the QC at production to verify they are assembled correctly.