We have a brand-new (1 day old) MFP6121/N in the office, connected to a linksys/cisco router via ethernet.
When we do not print/fax/copy/scan anything for a while, the printer goes to sleep mode. However, even if we do not print anything, every once in a while, the printer wakes up, warms up, and after warming up, waits for a few minutes and goes back to sleep.
Any ideas? we do not want the printer to wake up unnecessarily.
Today, we measured and found out that when the printer wakes up, it takes 5 mins to go to sleep (this is a printer configuration param), then, exactly after 15 minutes, the printer wakes up again. I do not understand why every 15 minutes the printer wakes up for no reason.