How long does the MF1538C take to warm up?
With Quick Startup mode ON, key operations can be performed on the touch panel display in 4 seconds or less, and copying can start in 12 seconds or less. With Quick Startup mode OFF, key operations are available in 75 seconds or less and copying can begin in 85 seconds or less. Recovery time from deep sleep mode with Eco recovery mode OFF is 10 seconds or less. (Page 19)
From the official Canon imageCLASS MF1538C Multifunction Laser Printer manual, page 19
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