How to fix Error 690#, 691# in Canon MX Series Printers.

Description:

network related error

Resolution:

1) WLAN flexible cable condition (wrong or imperfect connection, connection at an angle, damage, etc.):

-> Re-connect the cable.

If the cable is damaged, replace it. Note that the WLAN flexible cable is not designated as a service part.

(2) If the error still occurs:

-> Replace the part(s) listed on the right (under “Parts to be replaced if the listed solutions are not effective”). 

If the above solution has not resolved your error, please contact Canon authorised service facility.