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Canon imageCLASS MF642Cdw going Offline / AirPrint flapping / turning sleep off


I'm looking for some help setting up my new ImageCLASS MF642Cdw


1) Any idea how I can permanatly stop it from sleeping / hibernating / shutting down on it's own? I've checked the manual and the only settings I can find to adjust sleep time is to set it from 0-60 minutes. I want it to be on all the time


2) It's availibility over LAN via Bonjour / AirPrint isn't reliable. I networked the printer via ethernet and assigned it a manual IP address. When I go to add the printer in System Preferences it doesn't show up. I can sometimes get it to show by toggling off/on Airprint in the settings. None of the other Airprint/Bonjour printers on the network have this issue. This issue is affecting multiple machines, multiple OS X versions. Furthermore, even after I've added the printer, it shows as "offline" in OS X. 








Hi BuddhaCanon.

Bonjour/Airprint connections and drivers are designed and implemented exclusivley by Apple.  If those are not working for the MF642Cdw, try removing them and then reinstalling the printer using the Canon-produced drivers. They're available, free of charge, on the Drivers & Downloads page.


These drivers should also solve the problem with the printer not waking up from sleep mode.  If that doesn't, try enabling Power Saver in the Wireless LAN settings (this will make it more responsive to network communications):


<Menu>  <Preferences>  <Network>  <Wireless LAN Settings>  Read the displayed message  <OK>  <Power Save Mode>  Select <Off> or <On>  


If you need immediate assistance with this issue, please contact us using the numbers and information at


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We're returning the printer. Thank you.

This response makes absolutely NO sense. It is no wonder the previous poster returned the unit.


After a few months of ownership, My MF260 started exhibiting this faulty behavior where upon waking from sleep, it would not connect to the wireless network. The printer console showed the printer as connected to WiFi, but nothing could find it on the network. Checking the router for connected devices showed that the printer was in fact NOT connected to the WiFi network.


There is obviously something wrong with the printer's ability to wake up from sleep.

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