Questions on reference designators ? For those of you that have them screened or otherwise marked on you board; what do you use reference or component designators for in today's technology? I have found a few people who use them on a unloaded board to check first-piece if no overlay is present h them. Some say it is for orientation and others say it is for rework or field repair. With cost of screening reference designators on the board running between 2 and 8% of the cost, there must be a better reason Phil Hinton [log in to unmask] The mail list is provided by IPC using SmartList v3.05 To unsubscribe from this list at any time, send a message to: [log in to unmask] with <subject: unsubscribe> and no text.