https://support.usa.canon.com/kb/index?page=content&id=ART180349 https://ij.manual.canon/ij/webmanual/ErrorCode/TS3500%20series/EN/ERR/1686.html?ref=1686 https://ij.manual.canon/ij/webmanual/ErrorCode/TS3500%20series/EN/ERR/1688.html?ref=1688 If the printer’s d...