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What do you mean by the "function lock" are you getting an error message?
The manual I'm looking at has no specs on the function lock feature. If my research turns something up I'll let you know in the mean time I'm going to open this backup to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.
did you hold function lock down for 2 full seconds?
Excellent..just rate service at top of page and I thank you