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Level 4

1,897 points

Help with Canon MX870 - scanner stopped working

Hi,

I bought a Canon Pixma MX870 printer/scanner a month or so ago and it was working fine up till this week. I had installed the Canon software and ran the OS X Software updpate when setting it up.

All of a sudden last week I couldn't print. It kept saying the printer couldn't be found. So I downloaded the Apple Canon printer software and reinstalled it thinking it couldn't do any harm. 😟 The printer is working again. The scanner not so much. If I do manage to get it to work (either by using the scanner from System preference > Print/Fax > and choosing open scanner or by using the MP Navigator it typically now will only work 1 time. After that it says "scanner not found" and sometimes if I close and reopen the scanner from Print/Fax it says "trying to open scanner session".

I know the MX870 is connected to the network. The blue wifi light is lit, it shows in the router's list of connected devicies, it also shows in Safari's list of Bonjour Devices.

I need this machine to scan and play nice with OS X - I need to scan more than print.

I ran Disk Warrior, ran chrons to do maintenance and fix permissions etc. I tried deleting and re- adding the scanner. That didn't work and I had to restore it from backup.

Anyone have any ideas on what to do next?

Thank you.

MBP 13 2.53gHZ/4mb RAM, PB G4 12, 1gHZ/768 mb RAM, OS X.3.9, Mac OS X (10.6.7), Touch 2 gen, Shuffle 1 gen, Nano 2 gen, PM7300/200 416 mb RAM OS

Posted on Jun 6, 2011 11:40 AM

18 replies

PAHU

Level 6

16,705 points

Apr 17, 2012 8:08 PM in response to jecboys

Yes, the printer component does not use Bonjour by default. It uses the Canon proprietary protocol.

With regards to the mDNSResponder, if you have Activity Monitor set to My Processes, you will not see this service. Change the drop menu to All Processes and check again.

Re the firewall, open System Prefs > Security > Firewall and check if it is ON - we want it OFF.

jecboys

Level 1

0 points

Apr 17, 2012 8:27 PM in response to PAHU

Thanks PAHU. I found the responder and the firewall was off. To make things even more interesting. I tried scanning from the scanner to the computer and was able to scan wirelessly to the Canon MP navigator EX without any trouble. I just can't find the scanner in the preferences area for printers and scanners. So it is connected and working but can't use the open scanner option that in in system preferences. Don't know why this is.

PAHU

Level 6

16,705 points

Apr 17, 2012 10:19 PM in response to jecboys

The Canon MP Navigator application uses the full scanner driver.

Image Capture and the scanner entry in Print & Scan use the ICA driver, which is like a mini driver built for Image Capture.

Yet neither driver influences your ability to see the scanner component on the network. This is a function of Bonjour but with the responder running and the firewall off, there must be some other reason for the scanner failing to appear, which at this moment I am not sure what that is. I'll have to do some more testing to see if I can recreate your symptom and get back to you later.

Help with Canon MX870 - scanner stopped working